[1] Paper published in English 

*Peer-reviewed international journal with IF, 
+ Peer-reviewed book 

*303. Morita, M., Kajita, H., Okazaki, A., Ueda, N., Umeda, K., Uchida, E.,  Kawahata, H. (2024) Evaluation of carbon flux through groundwater and river water at the western foothills of Mt. Chokai. Geochemical J., GJ24021 

*302. Nitzsche, K.N., Yoshimura, T., Ishikawa, N.F. , Kawahata, H., Ogawa, N.O., Suzuki, K., Araoka, D., and Ohkouchi, N. (2024) Zinc isotope fractionation during the sorption of Zn to minerals and organic matter in sediment cores affected by anthropogenic pollution. Applied Geochemistry, 169, 106047. 

*301. Nitzsche, K.N., Ishikawa, N.F. , Yoshimura, T., Kajita, H., Kawahata, H., Ogawa, N.O., Suga, H.  and Ohkouchi, N. (2024) Historical trend of polycyclic aromatic hydrocarbons in a sediment core from Osaka Bay during the Meghalayan. Holocene, 34, 860 - 869． 

2023 

*300. Inoue M., Fukushima A., Chihara M., Genda A., Ikehara M., Okai T., Kawahata, H., Siringan F.P., and Suzuki A. (2023) Natural and Anthropogenic Climate Variability Signals in a 237-Year-Long Coral Record From the Philippines. Paleoceanography and Paleoclimatology, 38, e2022PA004540. 

*299. Xiao, J., Zhao, Z., Bouchez, J., Ma, X., Pogge von Strandmann, P.A.E., Araoka, D., Yoshimura, T., Zakir, H.H.M., Kawahata, H., and Jin, Z., (2023)Geothermal input significantly influences riverine and oceanic boron budgets. Earth and Planetary Science LettersVolume 621, Article number 118397. 

*298. Kinoshita, S., Kuroyanagi, A., Kawahata, H., Fujita, K., Ishimura, T., Suzuki, A., Kano, H., Kubota, Y. Sasaki, O., and Nishi, H. (2023) Constant shell density of hyaline large benthic foraminifers under thermal stress. Marine Micropaleontology, 181, 102232.  

*297. Kajita, H., Isaji, Y., Kato, R., Nishikkura, Y. Murayama, M,, Ohkouchi, N., Yanga, S., Zheng, H., Wang, K., Nakanishi, T., Sasaki, T., Maeda, A., Suzuki, A., Yamanaka, T. and Kawahata, H. (2021) Biomarkers in the rock outcrop of the Kazusa Group reveal palaeoenvironments of the Kuroshio region. (2023) Climatic change around the 4.2 ka event in coastal areas of the East China Sea and its potential influence on prehistoric Japanese people. Palaeogeography, Palaeoclimatology, Palaeoecology, 609, 111310. 

2022 

*296. Maeda, A., Kuroyanagi, A., Iguchi, A., Gaye, B., Rixen, T., Nishi, H. and Kawahata, H. (2022) Seasonal variation of fluxes of planktic foraminiferal tests collected by a time-series sediment trap in the central Bay of Bengal during three different years. Deep Sea Research Part I: 183, 103718. 

*295. Hossain, H.M.Z., Kawahata, H., Sampei, Y., Feakins, S.J., and Ratnayake, A.S. (2022) Organic matter and sedimentary accumulation rates in a transect of cores in the Bay of Bengal offshore Bangladesh and Andaman Sea offshore Myanmar. Marine and Petroleum Geology 142, 105769 

*294. Kinoshita, S., Wang, Q., Kuroyanagi, A , Murayama, M., Ujiié, Y., and Kawahata, H. (2022) Response of planktic foraminiferal shells to ocean acidification and global warming assessed using micro-X-ray computed tomography. Paleontological Research 26 (4), 390-404 

*293. Nitzsche, K. Yoshimura, T., Ishikawa, N.F., Kajita, H., Kawahata, H., Ogawa, N., Suzuki, K., Yokoyama, Y. and Ohkouchi, N. (2022) Metal contamination in a sediment core from Osaka Bay during the last 400 years. Progress in Earth and Planetary Science 9 (1), 1-19  

*292. Eom, J., Yoshimura, T., Akizawa, N., Wakaki, S., Ishikawa, T., Takazawa, E., Yamaoka, K. and Kawahata, H. (2022) The magnesium isotopic compositions of the crust and mantle: A study on the Oman ophiolite. Chemical Geology, 606, 606, 120969. 

*291. Kajita, H., Nakazawa, T. Utsunomiya, M., Ohkouchi, N., Sato, M., Harada, N. and Kawahata, H. (2022) Long-chain alkenones in the Shimosa Group reveal palaeotemperatures of the Pleistocene interglacial Palaeo-Tokyo Bays. Progress in Earth and Planetary Science 9 (1), 1-13 

*290. Ota, Y., Kawahata, H., Kuroda, J., Suzuki, A., Abe-Ouchi, A., Jimenez-Espejo, F.J. (2022) Millennial-scale variability of Indian summer monsoon constrained by the western Bay of Bengal sediments: Implication from geochemical proxies of sea surface salinity and river runoff. Global Planetary Change, 208, 103719. 

2021 

*289. Kajita, H., Maeda, A., Utsunomiya, M., Yoshimura, T., Ohkouchi, N.,, Suzuki, A., Kawahata, H., (2021) Biomarkers in the rock outcrop of the Kazusa Group reveal palaeoenvironments of the Kuroshio region. Communications Earth & Environment, 2, 82. 

*288. Yoshimura, T., Araoka, D., Kawahata, H., Hossain, H.M.Z., Ohkouchi, N. (2021) The Influence of Weathering, Water Sources, and Hydrological Cycles on Lithium Isotopic Compositions in River Water and Groundwater of the Ganges–Brahmaputra–Meghna River System in Bangladesh. Frontiers in Earth Science, 2021, 9, 668757. 

*287. Yoshimura, T., Wakaki, S., Kawahata, H., ...Ishikawa, T., Ohkouchi, N. (2021) Stable Strontium Isotopic Compositions of River Water, Groundwater and Sediments From the Ganges–Brahmaputra–Meghna River System in Bangladesh. Frontiers in Earth Science, 2021, 9, 592062 

*286. Akizawa, N., Miyake, A., Igami, Y., Tsuchiyama, A., Asanuma, H., Kogiso, T., Wakaki, S., Ishikawa, T., Arai, S., Eom, J., Kawahata, H., Aze, T., and Yokoyama, Y. (2011) Crustal anorthosite formation by deep‐seated hydrothermal circulation beneath fast‐spreading axis: Constraints from chronological approach, Sr isotope, and fluid–chromite. Island Arc 30 (1), e12423. 

*285. Kuroyanagi, A., Irie, T., Kinoshita, S., Kawahata, H., Suzuki, A., Nishi, H., Sasaki, O., Takashima, R., Fujita, K. (2021) Decrease in volume and density of foraminiferal shells with progressing ocean acidification. Scientific Reports, 11, 19988. DOI: 10.1038/s41598-021-99427-1 

*284. Kinoshita, S., Kuroyanagi, A., Kawahata, H., Fujita, K., Ishimura, T., Suzuki, A., Sasaki, O., Nishi, H. (2021) Temperature effects on the shell growth of a larger benthic foraminifer (Sorites orbiculus): Results from culture experiments and micro X-ray computed tomography. Marine Micropaleontol., 163, 101960. DOI: 10.1016/j.marmicro.2021.101960 

2020 

*283. Kajita, H., Harada, N., Yokoyama, Y., Sato, M,, Ogawa, N., Miyairi, Y., Sawada, C., Suzuki, A., and Kawahata, H. (2020) High time-resolution alkenone paleotemperature variations in Tokyo Bay during the Meghalayan: Implications for cold climates and social unrest in Japan. Quaternary Science Reviews 230, 106-160. (1) 

*282. Kajita, H., Nakamura, H., Ohkouchi, N., Harada, N., Sato, Miyako, Tokioka, S., and Kawahata, H. (2020) Genomic and geochemical identification of the long-chain alkenone producers in the estuarine Lake Takahoko, Japan: Implications for temperature reconstructions. Organic Geochemistry, Elsevier, 142, 103980. (0) 

*281. Kajita H., Ota Y., Yoshimura T., Araoka D., Manaka T., Ouyang Z., Iwasaki S., Yanase T., Inamura A., Uchida E., Zheng H., Yang Q., Wang K., Suzuki A., and Kawahata, H. (2020) Seasonal and spatial variations of chemical weathering in the Mekong Basin: From the headwaters to the lower reaches. Aquatic Geochemistry, Springer, 26, 137-159. (0) 

*280. Eom, J., Yoshimura, T., Araoka, D., Gamo, T., and Kawahata, H. (2020) Magnesium isotopic composition of submarine vent fluids from arc and back-arc hydrothermal systems in the western Pacific. Chemical Geology, 119767 (1) 

*279. Sun, Y., Ishikawa, N., Ogawa, N.O., Kawahata, H., Takano, Y. and Ohkouchi, N. (2020) A method for stable carbon isotope measurement of underivatized individual amino acids by multi-dimensional HPLC and EA/IRMS. Rapid Communications in Mass Spectrometry, 34, e8885. 

*278. Yoshimura, T., Wakaki, S., Ishikawa, T., Gamo, T., Araoka, D., Ohkouchi, B.N., and Kawahata, H. (2020) A systematic assessment of stable Sr isotopic compositions of vent fluids in Arc/Back-arc hydrothermal systems: Effects of host rock type, phase separation, and overlying sediment. Frontiers in Earth Science, 2020, 8, 591711. doi: 10.3389/feart.2020.591711 

*277. Kuroyanagi, A., Kawahata, H., Ozaki, K., Suzuki, A., Nishi, H. and Takahima, R. (2020) What drove the evolutionary trend of planktic foraminifers during the Cretaceous: Oceanic Anoxic Events (OAEs) directly affected it ? Marine Micropaleontology, 161, 101924. DOI: 10.1016/j.marmicro.2020.101924. 

2019 

*276. Kawahata, H. (2019) Climatic reconstruction at the Sannai-Maruyama site between Bond events 4 and 3 Implication for the collapse of the society at 4.2 ka event -. Progress in Earth and Planetary Science, 6: 63 /doi.org/10.1186/s40645-019-0308-8. (1) 

*275. Kawahata, H., Fujita, K., Iguchi, A, Inoue, M., Iwasaki, S., Kuroyanagi, A., Maeda, A., Manaka, T., Moriya, K., Takagi, H., Toyofuku, T., Yoshimura, T., Suzuki, A. (2019) Perspective on the response of marine calcifiers to global warming and ocean acidification – Behavior of corals and foraminifera in a high CO2 world “hot house”. Progress in Earth and Planetary Science 6: 5, doi10.1186/s40645-018-0239-9. (13) 

*274. Ota, Y., Kuroda, J., Yamaguchi, A., Suzuki, A., Araoka, D., Ishimura, T., NGHP Expedition, JAMSTEC Science Team, Kawahata, H. (2019) Monsoon-influenced variations in plankton community structure and upper-water column stratification in the western Bay of Bengal during the past 80 ky. Palaeogeography, Palaeoclimatology, Palaeoecology, 521, 138-150. (2) 

*273. Ota, Y., Kawahata, H., Kuroda, J., Yamaguchi, A., Suzuki, A., Araoka, D., Abe‐Ouchi, A., Yamada, Y., Ijiri, A., Kanamatsu, T., Kinoshita, M., Moe, K. T., Lin, W., Saito, S., Sanada, Y., Hamada, Y., Nakamura, Y., Shinmoto, Y., Wu, H. Y., Ahagon, N., Aoike, K., Iijima, K., Machiyama, H., Tejada, M. L., Umetsu, K., Usui, Y., Yamamoto, Y., Yoshikawa, S., Jimenez‐Espejo, F., Haraguchi, S., Komai, N., Suga, H., Abe, N., Gupta, L., Hirose, T., Masaki, Y., Nomura, S., Sugihara, T., Tanikawa, W., Kubo, Y., Maeda, L., Toczko, S. (2019). Indian monsoonal variations during the past 80 kyr recorded in NGHP‐02 Hole 19B, western Bay of Bengal: Implications from chemical and mineral properties. Geochemistry, Geophysics, Geosystems, 20, 148-165, . https://doi.org/10.1029/2018GC007772 (2) 

*272. Manaka, T., Zakir HM, Yoshimura, T., Suzuki, A., and Kawahata, H. (2019) Monthly changes in pCO2 in the Ganges River: implications for carbon release from soil to the atmosphere via inland waters. Journal of Agricultural Meteorology, 75, 47-55. (1) 

*271. Kuroyanagi, A., Toyofuku, T., Nagai, Y., Kimoto, K., Nishi, H., Takashima, R., and Kawahata, H. (2019). Effect of euxinic conditions on planktic foraminifers: Culture experiments and implications for past and future environments. Paleoceanography and Paleoclimatology, 34, 54-62. https://doi.org/10.1029/2018PA003539 (3) 

*270. Isaji, Y., Kawahata, H., Ogawa, N.O., Kuroda, J., Yoshimura, T., Jiménez-Espejo, F.J., Makabe, A., Shibuya, T., Lugli, S., Santulli, A., Manzi, V., Roveri, M., and Ohkouchi, N. (2019) Efficient recycling of nutrients in modern and past hypersaline environments. Scientific Report, 9, 1-12. (5) 

*269. Isaji, Y., Kawahata, H., Takano, Y., Ogawa, N.O., Kuroda, J., Yoshimura, T., Lugli, S., Manzi, V., Roveri, M., and Ohkouchi, N. (2019) Diazotrophy drives primary production in the organic-rich shales deposited under a stratified environment during the Messinian salinity crisis (Vena del Gesso, Italy). Frontiers in Earth Science, 7, 85. (1) 

*268. Isaji, Y., Yoshimura, T., Araoka, D., Kuroda, J., Ogawa, N.O.. Kawahata, H. and and Ohkouchi, N. (2019) Magnesium isotope fractionation during synthesis of chlorophyll a and bacteriochlorophyll a of benthic phototrophs in hypersaline environments. ACS Earth and Space Chemistry, 3, 1073-1079, doi:10.1021/acsearthspacechem.9b00013. (2) 

*267. Isaji, Y., Yoshimura, T., Kuroda, Tamenori, Y., Jiménez-Espejo, F.J.; Lugli, S., Manzi, V., Roveri, M., Kawahata, H., and Ohkouchi, N. (2019) Biomarker records and mineral compositions of the Messinian halite and K–Mg salts from Sicily. Progress in Earth and Planetary Science, 6: 1. 

*266. Yoshimura, T., Maeda, A., Tamenori, Y., Suzuki, A., Fujita, K., and Kawahata, H. (2019) Partitioning and chemical environments of minor elements in individual large benthic foraminifera cultured in temperature-controlled tanks. Frontiers in Earth Science, 7, 124. (0) 

*265. Maeda, A., Yoshimura, T., Araoka, D., Suzuki, A., Tamenori, Y., Fujita, K., Toyofuku, T., Ohkouchi, N., and Kawahata, H. (2019) Magnesium isotopic composition of tests of large benthic foraminifers: implications for biomineralization. Geochemistry, Geophysics, Geosystems, 20, 4046-4058, https://doi.org/10.1029/2019GC008314. (0) 

*264. Yamaoka, K., Wang, Q., Kawahata, H., and Suzuki, A. (2019) Experimental study to assess the pH effect on metal release from Fe-Mn nodules and pelagic clays. Proceedings of the 29th International Ocean and Polar Engineering Conference (ISOPE-2019), 92-97. 

2018 

*263. Ota, Y., Kawahata, H., Kuroda, J., Yamaguchi, A., Suzuki, A., Araoka, D., Abe‐Ouchi, A., Yamada, Y., Ijiri, A., Kanamatsu, T., Kinoshita, M., Moe, K. T., Lin, W., Saito, S., Sanada, Y., Hamada, Y., Nakamura, Y., Shinmoto, Y., Wu, H. Y., Ahagon, N., Aoike, K., Iijima, K., Machiyama, H., Tejada, M. L., Umetsu, K., Usui, Y., Yamamoto, Y., Yoshikawa, S., Jimenez‐Espejo, F., Haraguchi, S., Komai, N., Suga, H., Abe, N., Gupta, L., Hirose, T., Masaki, Y., Nomura, S., Sugihara, T., Tanikawa, W., Kubo, Y., Maeda, L., Toczko, S. (2018). Indian monsoonal variations during the past 80 kyr recorded in NGHP‐02 Hole 19B, western Bay of Bengal: Implications from chemical and mineral properties. Geochemistry, Geophysics, Geosystems, 19. https://doi.org/10.1029/2018GC007772 (0) 

*262. Kajita, H., Kawahata, H., Wang, K., Zheng, H., Yang, S., Ohkouchi, N., Utsunomiya, M., Zhou, B., Zheng, B. (2018) Extraordinary cold episodes during the mid-Holocene in the Yangtze delta: Interruption of the earliest rice cultivating civilization. Quaternary Science Reviews, 201, 418-428. (10) 

*261. Maeda, A., Fujita, K., Horikawa, K., Suzuki, A., Yoshikazu, O. and Kawahata, H. (2018) Calibration between temperature and Mg/Ca and oxygen isotope ratios in high- magnesium calcite of asexually reproduced juveniles of large benthic foraminifera. Micropaleontology, 143, 63-69. (1) 

*260. Inoue, M., Nakamura, T., Tanaka, Y., Suzuki, A., Yokoyama, Y., Kawahata, H., Sakai, K., and Gussone, N. (2018) A simple role of coral-algal symbiosis in coral calcification based on multiple geochemical tracers. Geochimica et Cosmochimica Acta, 235, 76-88. (5) 

*259. Wang, Q., Kawahata, H., Yamaoka, K. and Suzuki, A. (2018) Potential influence of ocean acidification on deep-sea Fe–Mn nodules and pelagic clays: an improved assessment by using artificial seawater. Aquatic Geochemistry, 24, 307-322.  (1) 

*258. Kessarkar, P.M., Naqvi, S.W.A., Thamban,M., Fernandes, L.L., Siebert, C., Rao, V.P., Kawahata, H., Ittekkot, V. and Frank M. (2018) Variations in denitrification and ventilation within the Arabian Sea oxygen minimum zone during the Holocene. Geochemistry, Geophysics, Geosystems, 19, 2179-2193. (4) 

*257. Yoshimura, T., Araoka, D., Tamenori, Y., Kuroda, J., Kawahata, H. and Ohkouchi, N. (2018) Lithium, magnesium and sulfur purification from seawater using an ion chromatograph with a fraction collector system for stable isotope measurements. Journal of Chromatography, 1531, 157-162, DOI: 10.1016/j.chroma.2017.11.052. (5) 

2017 

*256. Kawahata, H., Matsuoka, M., Togami, A., Harada, N., Murayama, M., Yokoyama, Y., Miyairi,Y., Matsuzaki, H., and Tanaka, Y. (2017) Climatic change and its influence on human society in western Japan during the Holocene. Quaternary International, 440, 102-117. DOI:10.1016/j.quaint.2016.04.013. 

*255. Kawahata, H., Ishizaki, Y., Kuroyanagi, A., Suzuki, A., and Ohkushi, K. (2017) Quantitative reconstruction of temperature at Jomon site in the Incipient Jomon period in northern Japan and its implication for the production of early pottery and stone arrowheads. Quaternary Science Reviews, 157, 66-79, DOI: 10.1016/j.quascirev.2016.12.009. 

*254. Wang, Q., Kawahata, H., Manaka, T., Yamaoka, K. and Suzuki, A. (2017) Potential influence of ocean acidification on deep-sea Fe–Mn nodules: results from leaching experiments. Aquatic Geochemistry, 23, 233-246, DOI: 10.1007/s10498-017-9320-z. 

*253. Isaji, Y., Kawahata, H., Kuroda, J., Yoshimura, T., Ogawa, N.O., Suzuki, A., Shibuya, T., Francisco J. Lugli, S.J., Santulli, A., Manzi, V., Roveri, M. and Ohkouchi, N. (2017) Biological and physical modification of carbonate system parameters along the salinity gradient in shallow hypersaline solar salterns in Trapani, Italy. Geochimica et Cosmochimica Acta, 208, 354-367, DOI: 10.1016/j.gca.2017.04.013. 

*252. Manaka, T., Araoka, D., Yoshimura, T., Hossain, H.M.Z., Nishio, Y., Suzuki, A. and Kawahata, H. (2017) Downstream and seasonal changes of lithium isotope ratios in the Ganges–Brahmaputra river system. Geochemistry, Geophysics, Geosystems, 18, 3003-3015, DOI: 10.1002/2016GC006738. 

*251. Zakir, H.M.Z., Kawahata, H., Manaka, T., and Otani, S. (2017) Geochemical characteristics of major rivers sediments in Myanmar and Thailand: implications for source area weathering and provenance. Erde-Geochemistry, 77, 443-458. DOI: 10.1016/j.chemer.2017.07.005. 

*250. Ota, Y., Kawahata, H., Sato, T. and Seto, K. (2017) Flooding history of Lake Nakaumi, western Japan, inferred from sediment records spanning the past 700 years. Journal of Quaternary Science, 32, 1063–1074, DOI:10.1002/jqs.2982. 

*249. Ota, Y., Kawahata, H., Murayama, M., Inoue, M., Yokoyama, Y., Miyairi, Y., Aung, T., Hossain, H.M.Z., Suzuki, A., Kitamura, A. and Moe, K.T. (2017) Effects of intensification of the Indian Summer Monsoon on northern Andaman Sea sediments during the past 700 years. Journal of Quaternary Science, 32, 528–539, DOI: 10.1002/jqs.2947. 

*248. Yoshimura, T., Tamenori, Y., Suzuki A., Kawahata, H., Iwasaki, N., Hasegawa, H., Nguyen, T.L., Kuroyanagi, A., Yamazaki T., Kuroda J. and Ohkouchi, N. (2017) Altervalent substitution of sodium for calcium in biogenic calcite and aragonite. Geochimica et Cosmochimica Acta, 202, 21-38, doi: 10.1016/j.gca.2016.12.003. 

*247. Iwasaki, S., Kimoto, K., Kuroyanagi, A., and Kawahata, H. (2017) Horizontal and vertical distributions of planktic foraminifera in the subarctic Pacific. Marine Micropaleontology, 130, 1-14, DOI: 10.1016/j.marmicro.2016.12.001. 

*246. Maeda, A., Fujita, K., Horikawa, K., Suzuki, A., Yoshimura, T., Tamenori, Y., and Kawahata, H. (2017) Evaluation of oxygen isotope and Mg/Ca ratios in high-magnesium calcite from benthic foraminifera as a proxy for water temperature. Journal of Geophysical Research, 122, 185-199. DOI: 10.1002/2016JG003587. 

2016 

*245. Iryu, Y., Kuramoto, K., Satoh, M., Matsumoto, J., Yoshioka, S., Kawahata, H. and Tada, R. [Editorial] (2016) A review by the chief editors of some of the most popular papers published by PEPS in 2014-2015. Progress in Earth and Planetary Science, 3, doi: 10.1186/s40645-016-0079-4. 

*244. Araoka, D., Nishio, Y., Gamo, T., Yamaoka, K. and Kawahata, H. (2016) Lithium isotopic systematics of submarine vent fluids from arc and back-arc hydrothermal systems in the western Pacific. Geochemistry, Geophysics, Geosystems, 17, 3835-3853. 

*243. Yoshimura, T., Kuroda, J., Lugli, S., Tamenori, Y., Ogawa, N. O., Jiménez‐Espejo, F. J., Isaji, Y., Roveri, M., Manzi, V., Kawahata, H. and Ohkouchi, N. (2016). An X‐ray spectroscopic perspective on Messinian evaporite from Sicily: Sedimentary fabrics, element distributions, and chemical environments of S and Mg. Geochemistry, Geophysics, Geosystems, 17(4), 1383-1400. doi:10.1002/2015GC006233. 

*242. Iwasaki, S., Inoue, M., Suzuki, A., Sasaki, O., Kano, H., Iguchi, A., Sakai, K. and Kawahata, H. (2016) The role of symbiotic algae in the formation of the coral polyp skeleton: 3-D morphological study based on X-ray microcomputed tomography. Geochemistry, Geophysics, Geosystems, 17, doi:10.1002/2016GC006536. 

*241. Takagi, H., Moriya, K., Ishimura, T., Suzuki, A., Kawahata, H. and Hirano, H. (2016) Individual migration pathways of modern planktic foraminifers: Chamber-by-chamber assessment of stable isotopes. Paleontological Research, 20, 268-284. 

2015 

*240. Takagi, H., Moriya, K., Ishimura, T., Suzuki, A., Kawahata, H. and Hirano, H. (2015) Exploring photosymbiotic ecology of planktic foraminifers from chamber-by-chamber isotopic history of individual foraminifers. Paleobiology, 41, 108-121. 

*239. Irizuki T., Kobe, M., Ohkushi, K., Kawahata, H. and Kimoto, K. (2015) Centennial- to millennial-scale change of Holocene shallow marine environments recorded in ostracode fauna, northeast Japan. Quaternary Research, 84, 467-480. 

*238. Yoshimura, T., *Izumida, H., Nakashima, R., Ishimura, T., Shikazono, N., Kawahata, H. and Suzuki, A. (2015) Stable carbon isotope values in dissolved inorganic carbon of ambient waters and shell carbonate of the freshwater pearl mussel (Hyriopsis sp.). Journal of Paleolimnology, DOI: 10.1007/s10933-015-9834-6. 

*237. Yoshimura, T., Tamenori, Y., Takahashi, O., Nguyen, L. T., Hasegawa, H., Iwasaki, N., Kuroyanagi, A., Suzuki, A. and Kawahata, H. (2015) Mg coordination in biogenic carbonates constrained by theoretical and experimental XANES. Earth and Planetary Science Letters, 421, 68-74. doi:10.1016/j.epsl.2015.03.048. 

*236. Inoue, M., Gussone, N., Koga, Y., Iwase, A., Suzuki, A., Sakai, K. and Kawahata, H. (2015) Controlling factors of Ca isotope fractionation in scleractinian corals evaluated by temperature, pH and light controlled culture experiments. Geochimica et Cosmochimica Acta, 167, 80–92. 

*235. Isaji, Y., Kawahata, H., Ohkouchi, N., Murayama, M., and Tamaki, K. (2015) Varying responses to Indian monsoons during the past 220 kyr recorded in deep-sea sediments in inner and outer regions of the Gulf of Aden. Journal of Geophysical Research: Oceans, 120(11), 7253–7270. DOI: 10.1002/2015JC010982. 

*234. Isaji, Y., Kawahata, H., Ohkouchi, N., Murayama, M., and Tamaki, K. (2015) Terrestrial environmental changes around the Gulf of Aden over the last 210 kyr deduced from the sediment n-alkane record: Implications for the dispersal of Homo sapiens. Geophysical Research Letter, 42, 1880–1887. doi: 10.1002/2015GL063196. 

*233. Manaka, T., Otani, S., Inamura, A., Suzuki, A., Aung, T., Roachanakanan, R., Ishiwa, T. and Kawahata, H. (2015) Chemical weathering and long-term CO2 consumption in the Ayeyarwady and Mekong river basins in the Himalayas. Journal of Geophysical Research: Biogeosciences, DOI 10.1002/2015JG002932. 

*232. Manaka, T., Ushie, H., Araoka, D., Inamura, A., Suzuki, A., Hossain, H. M. Zakir. and Kawahata, H. (2015) Spatial and seasonal variation in surface water pCO2 in the Ganges, Brahmaputra, and Meghna Rivers on the Indian subcontinent. Aquatic Geochemistry, 21, 437-458, DOI 10.1007/s10498-015-9262-2. 

*231. Kawahata, H., Nomura, R., Matsumoto, K. and Nishi, H. (2015) Linkage of rapid acidification process and extinction of benthic foraminifera in the deep sea at the Paleocene/Eocene transition. Island Arc, doi:10.1111/iar.12106. 

*230. Yamaoka, K., Matsukura, S., Ishikawa, T., and Kawahata, H. (2015) Boron isotope geochemistry of the hydrothermally altered oceanic crust and ore deposit from the Troodos ophiolite, Cyprus. Chemical Geology, 396, 61-73. 

*229. Yamaoka, K., Hong, E., Ishikawa, T., Gamo, T., and Kawahata, H. (2015) Boron isotopic geochemistry of vent fluids from arc/back-arc seafloor hydrothermal systems in the western Pacific. Chemical Geology, 392, 9-18. 

2014 

*228. Tamenori, Y., Yoshimura, T., Nguyen, T. L., Hasegawa, H., Suzuki, A., Kawahata, H. and Iwasaki, N. (2014) Identification of the chemical form of sulfur compounds in the Japanese pink coral (Corallium elatius) skeleton using μ-XRF/XAS speciation mapping. Journal of Structural Biology, 186, 214-223. 

*227. Yoshimura, T., Suzuki, A., Tamenori, Y. and Kawahata, H. (2014) Micro-X-ray fluorescence-based comparison of skeletal structure and P, Mg, Sr, O and Fe in a fossil of the cold-water coral Desmophyllum sp., NW Pacific. Geo-Marine Letters, 34, 1-9. doi:10.1007/s00367-013-0347-x. 

*226. Yoshimura, T., Tamenori, Y., Kawahata, H. and Suzuki, A. (2014) Fluctuations of sulfate, S-bearing amino acids and magnesium in a giant clam shell. Biogeosciences, 11, 3881-3886. 

*225. Inoue, M., Ishikawa, D., Miyaji, T., Yamazaki, A., Suzuki, A., Yamano, H., Kawahata, H., and Watanabe, T. (2014) Evaluation of Mn and Fe in coral skeletons (Porites spp.) as proxies for sediment loading and reconstruction of 50 yrs of land use on Ishigaki Island, Japan. Coral Reefs, 33, 363-373. 

*224. Ohki, S., Irie, T., Inoue, M., Shinmen, K., Kawahata, H., Nakamura, T., Kato, A., Nojiri, Y., Suzuki, A., Sakai, K., R. van Woesik (2014) Calcification responses of symbiotic and aposymbiotic corals to near-future levels of ocean acidification. Biogeosciences, 10, 1–8, doi:10.5194/bg-10-1-2013. 

*223. Kawahata, H., Yamashita, S., Yamaoka, K., Okai, T., Shimoda, G., and Imai, N. (2014) Heavy metal pollution in Ancient Nara, Japan, during the eighth century. Progress in Earth and Planetary Science, 1, 1-15, doi:10.1186/2197-4284-1-15. 

*222. Araoka, D., Kawahata, H., Takagi, T., Watanabe, Y., Nishimura, K. and Nishio, Y. (2014) Lithium and strontium isotopic systematics in playas in Nevada, USA: constraints on the origin of lithium. Mineralium Deposita, 39, 371-379. 

2013 

*221. Liu, G., Kojima, K., Yoshimura, K., Okai, T., Suzuki, A., Oki, T., Siringan, F.P., Yoneda, M. and Kawahata, H. (2013) A model-based test of accuracy of seawater oxygen isotope ratio record derived from a coral dual proxy method at southeastern Luzon Island, the Philippines. Journal of Geophysical Research: Biogeosciences, 118, 853–859, DOI: 10.1002/jgrg.20074. 

*220. Sagawa, T., Kuroyanagi, A., Irino, T., Kuwae, M. and Kawahata, H. (2013) Seasonal variations in planktonic foraminiferal flux and oxygen isotopic composition in the western North Pacific: Implications for paleoceanographic reconstruction. Marine Micropaleontology, 100, 11-20. doi: 10.1016/j.marmicro.2013.03.013. 

*219. Yamamoto, M., Kishizaki, M., Oba, T. and Kawahata, H. (2013) Intense winter cooling of the surface water in the northern Okinawa Trough during the last glacial period. Journal of Asian Earth Sciences, 69, 82-92. 

*218. Yoshimura, T., Tamenori, Y., Iwasaki, N., Hasegawa, H., Suzuki, A. and Kawahata, H. (2013) Magnesium K-edge XANES spectroscopy of geological standards. Journal of Synchrotron Radiation, 20, 734–740, doi:10.1107/S0909049513016099, 20, 734-740. 

*217. Yoshimura, T., Tamenori, Y., Suzuki, A., Nakashima, R., Iwasaki, N., Hasegawa, H. and Kawahata, H. (2013) Element profile and chemical environment of sulfur in a giant clam shell: insights from μ-XRF and X-ray absorption near-edge structure. Chemical Geology, 352, 170-175. 

*216. Ohki, S., Irie, T., Ioue, M., Shinmen, K., Kawahata, H., Nakamura, T., Kato1, A., Nojiri, Y., Suzuki, A., Sakai, K. and van Woesik, R. (2013) Symbiosis increases coral tolerance to ocean acidification. Biogeosciences Discussion, 10, 7013-7030. 

*215. Manaka, T., Ushie, H., Araoka, D., Inamura, A., Suzuki, A. and Kawahata, H. (2013) Rapid alkalization in Lake Inawashiro, Fukushima, Japan: implications for future changes in the carbonate system of terrestrial waters. Aquatic Geochemistry, 19, 281-302, DOI 10.1007/s10498-013-9195-6. 

*214. Araoka, D., Yokoyama, Y., Suzuki, A., Goto, K., Miyagi, K., Miyazawa, K., Matsuzaki, H., and Kawahata, H. (2013) Tsunami recurrence revealed by Porites coral boulders in the southern Ryukyu Islands, Japan. Geology, 41, 1139-1142, doi:10.1130/G34415.1. 

*213. Tanaka, Y., Iguchi, A., Inoue, M., Mori, C., Sakai, K., Suzuki, A., Kawahata, H. and Nakamura, T. (2013) Microscopic observation of symbiotic and aposymbiotic juvenile corals in nutrient-enriched seawater. Marine Pollution Bulletin, 68, 93-98. 

*212. Kuroyanagi, A., da Rocha, R.E., Bijima, J., Spero, H.J., Russell, A.D., Eggins, S.M. and Kawahata, H. (2013) Effect of dissolved oxygen concentration on planktonic foraminifera through laboratory culture experiments and implications for oceanic anoxic events. Marine Micropaleontology, 101, 28-32. 

*211. Hayashi, E., Suzuki, A., Nakamura, T., Iwase, A., Ishimura, T., Iguchi, A., Sakai, K., Okai, T., Inoue, M., Araoka, D., Murayama, S. and Kawahata, H. (2013) Growth-rate influences on coral climate proxies tested by a multiple colony culture experiment. Earth Planetary Science Letters, 362, 198-206. 

2012 

*210. Inoue, M., Shinmen, K., Kawahata, H., Nakamura, T., Tanaka, Y., Kato, A., Shinzato, C., Iguchi, A., Kan, H., Suzuki, A. and Sakai, K. (2012) Estimate of calcification responses to thermal and freshening stresses based on culture experiments with symbiotic and aposymbiotic primary polyps of a coral, Acropora digitifera. Global and Planetary Change, 92–93, 1–7. 

*209. Yokoyama, Y., Okubo, J., Miyairi, Y., Obrochta, S., Demboya, N., Makino, Y. and Kawahata, H. (2012) Holocene sea-level change and Antarctic melting history derived from geological observations and geophysical modeling along the Shimokita Peninsula. Geophysical Research Letters, 39, L13502, doi:10.1029/2012GL051983. 

*208. Hathorne, E., Felis, T., Suzuki, A., Kawahata, H., and Cabioch, G. (2013) Lithium in the aragonite skeletons of massive Porites corals: A new tool to reconstruct tropical sea surface temperatures. Paleoceanography, 28, 143-152, doi:10.1029/2012PA002311. 

*207. Yamaoka，K., Ishikawa, T., Matsubaya, O. Ishiyama, D., Nagaishi, K., Hiroyasu, Y., Chiba, H. and Kawahata, H. (2012) Boron and oxygen isotope systematics for a complete section of oceanic crustal rocks in the Oman ophiolite. Geochimica et Cosmochimica Acta, 84, 543–559. 

2011 

*206. Yasuhara, M., Hunt, G., Cronin, T.M., Hokanishi, N., Kawahata, H., Tsujimoto, A. and Ishitake, M. (2011) Climatic forcing of Quaternary deep-sea benthic communities in the North Pacific Ocean. Paleobiology, 38, 162-179. 

*205. Kuroyanagi, A., Kawahata, H. and Nishi, H. (2011) Seasonal variation in the oxygen isotopic composition of different-sized planktonic foraminifer Neogloboquadrina pachyderma (sinistral) in the northwestern North Pacific and implications for reconstruction of the paleoenvironment, Paleoceanography, 26, PA4215, doi:10.1029/2011PA002153. 

*204. Iguchi, A., Ozaki, S., Nakamura, T., Inoue, M., Tanaka, Y., Suzuki, A., Kawahata, H. and Sakai, K. (2011) The effect of acidified seawater on coral calcification and symbiotic algae of a massive coral Porites australiensis. Marine Environmental Research, 73, 32-36. 

*203. Hikami, M., Fujita, K., Kuroyanagi, A., Irie, T., Ushie, H., Nojiri, Y., Suzuki, A., and Kawahata, H. (2011) Contrasting ocean acidification responses of calcification between two coral reef benthic foraminiferal species Marginopora kudakajimensis and Calcarina gaudichaudii. Geophysical Research Letters, 38, Doi:10.1029/2011GL048501. 

*202. Nakazawa, T., Ueno, K., Kawahata, H., and Fujikawa, M. (2011) Gzhelian-Asselian Palaeoaplysina-microencruster reef community in the Taishaku and Akiyoshi limestones, SW Japan: Implications for the Late Paleozoic reef evolution on mid-Panthalassan atolls. Palaeogeography, Palaeoclimatology, Palaeoecology, 310, 378-392. 

*201. Fujita, K., Hikami, M., Suzuki, A., Kuroyanagi, A., Sakai, K., Kawahata, H., and Nojiri, Y. (2011) Effects of ocean acidification on calcification of symbiont-bearing reef foraminifers. Biogeosciences, 8, 2089-2098, doi:10.5194/bg-8-2089-2011.   

*200.  *Izumida, H., *Yoshimura, T., Suzuki, A., Nakashima, R., Ishimura, T., Yasuhara, M., Inamura, A., Shikazono, N. and Kawahata, H. (2011) Biological and water chemistry controls on Sr/Ca, Ba/Ca, Mg/Ca and delta 18O profiles in freshwater pearl mussel Hyriopsis sp. Paleogeography Paleoclimatology Paleoecology, 309, 298-308. 

*199. Yoshimura, T., Tanimizu, M., Inoue, M., Suzuki, A., Iwasaki, N. and Kawahata, H. (2011) Mg isotope composition of hermatypic and deep-sea corals. Analytical & Bioanalytical Chemistry, 401, 2755–2769. 

*198. Izozaki, Y., Aljinovic, D. and Kawahata, H. (2011) The Guadalupian (Permian) Kamura event in European Tethys. Palaeogeography Palaeoclimatology Palaeoecology, 308, 12–21. 

*197. Inoue, M., Suwa, R., Suzuki, A., Sakai, K. and Kawahata, H. (2011) Effects of seawater pH on growth and skeletal U/Ca ratios 2 of Acropora digitifera coral polyps. Geophysical Research Letters, 38, L12809, doi:10.1029/2011GL047786. 

*196. Yokoyama, Y., Suzuki, A., Siringan, F., Maeda, Y., Abe‐Ouchi, A., Ohgaito, R., Kawahata, H. and Matsuzaki, H. (2011) Mid‐Holocene palaeoceanography of the northern South China Sea using coupled fossil‐modern coral and atmosphere‐ocean GCM model. Geophysical Research Letters, 38, L00F03, doi:10.1029/2010GL044231. 

*195. Liu, Z., Zheng, J., Yamada, M., Pan, S. and Kawahata, H. (2011) Plutonium characteristics in sediments of Hiroshima Bay in the Seto Inland Sea in Japan. Journal of Radio analytical & Nuclear Chemistry. DOI 10.1007/s10967-011-1025-y. 

*194. Kawahata, H., Minoshima, K., Ohshima, H. and Kuroyanagi, A.（2011）Terrestrial - ocean environmental change in the northwestern Pacific from the glacial times to Holocene. Asian Earth Science, 40, 1189-1202. 

*193. Watanabe, T., Suzuki, A., Kawashima, T., Minobe, S., Kameo, K., Minoshima, K., Aguilar, Y.M., Wani, R., Kawahata, H. and Kase, T. (2011) Pliocene El Niño: Coral evidence of robust interannual variabilities during warm period. Nature, 471, 209-211. 

*192. Toyofuku, T., Suzuki, M., Suga, H., Sakai, S., Suzuki, A., Ishikawa, T., Nooijer, L.J., Schiebel, R., Kawahata, H. and Kitazato, H. (2011) Mg/Ca and d18O in the brackish shallow-water benthic foraminifer Ammonia ‘beccarii’. Marine Micropaleontology, 78, 113-120. 

2010 

*191. Musashi, M., Isozaki, Y. and Kawahata, H. (2010) An Early–Middle Guadalupian (Permian) isotopic record from a mid-oceanic Carbonate buildup: Akiyoshi Limestone, Japan. Global Planetary Change, 73, 114-122. 

*190. Felis, T., Suzuki, A., Kuhnert, H., Rimbu, N. and Kawahata, H. (2010) Pacific Decadal Oscillation documented in a coral record of North Pacific winter temperature since 1873. Geophysical Research Letters, 37, L14605, doi:10.1029/2010GL043572. 

*189. Araoka, D., Inoue, M., Suzuki, A., Yokoyama, Y., Edwards, R.L., Cheng, H., Matsuzaki, H., Kan, H., Shikazono, N. and Kawahata, H. (2010) Historic geohazard events confirmed by high-resolution U/Th dating of emerged massive Porites boulders at Ishigaki Island in the Ryukyus, Japan. Geochemistry, Geophysics, Geosystems, 11, Q06014, doi:10.1029/2009GC002893. 

*188. Mishima, M., Suzuki, A., Nagao, M., and Kawahata, H. (2010) Abrupt shift toward cooler condition in the Earliest 20th Century Detected in a 165-year Coral Record from Ishigaki Island, Southwestern Japan. Geophysical Research Letters, 37, L15609, doi:10.1029/2010GL043451. 

*187. Inoue, M., Harada, M., Suzuki, A., Kawahata, H., Matsuzaki, H., and Yokoyama, Y. (2010) Trace element variations in fossil corals from Tahiti collected by IODP Expedition 310: Reconstruction of marine environments during the last deglaciation (15 to 9 ka). Marine Geology, 271, 303-306. 

*186. Ando, A., Nakano, T., Kawahata, H., Yokoyama, Y. and Khim, B.K. (2010) Seawater Sr isotope ratios on a glacial–interglacial timescale: An application of latest high-precision thermal ionization mass spectrometry. Geochemical Journal, 44, 347-357. 

*185. Yoshimura, T., Kawahata, H., Nakashima, R., Suzuki, A., and Tomioka, N. (2010) Oxygen and carbon isotope records of cultured freshwater pearl mussel Hyriopsis sp. shell from Lake Kasumigaura, Japan. Journal of Paleolimnology, 43, 437-448, doi: 10.1007/s10933-009-9341-8. 

*184. Ushie, H., Kawahata, H., Suzuki, A., Murayama, S. and Inoue, M. (2010) Enhanced riverine carbon flux from carbonate catchment to the ocean: a comparative hydrogeochemical study in Ishigaki and Iriomote Islands, southwestern Japan. Journal Geophysical Research, 115, G02017. 

2009 

*183. Kuroyanagi, A. Kawahata, H., Suzuki, A., Fujita, K. and Irie, T. (2009) Impacts of ocean acidification on large benthic foraminifers: Results from laboratory experiments. Marine Micropaleontology, 73, 190–195. 

*182．Ito, M., Yamaoka, K., Masuda, H., Kawahata, H., and Gupta, LP., (2009) Thermal stability of amino acids in biogenic sediments and aqueous solutions at seafloor hydrothermal temperatures. Geochemical Journal, 43, 331- 341. 

*181．Kawahata, H., Minoshima, K., Ishizaki, Y., Yamaoka, K., Gupta, L.P., Nagao, M. and Kuroyanagi, A. (2009) Comparison of settling particles and sediments at IMAGES coring site in the northwestern North Pacific - effect of resuspended particles on paleorecords -. Sedimentary Geology, 222, 254-262. 

*180．Chang, Y.P., Chen, M.T., Yokoyama, Y., Matsuzaki, H., Thompson, W.G., Kao, S.J., and Kawahata, H. (2009) Monsoon hydrography and productivity changes in the East China Sea during the past 100,000 years: Okinawa Trough evidence (MD012404). Paleoceanography,24, PA3208, doi:10.1029/2007PA001577. 

*179. Felis, T., Suzuki, A., Kuhnert, H., Dima, M., Lohmann, G. and Kawahata, H. (2009) Subtropical coral reveals abrupt early 20th century freshening in the western North Pacific Ocean. Geology, 37, 527-530, doi: 10.1130/G25581A.1. 

*178. Isono, D., Yamamoto, M., Irino, T., Oba, T., Murayama, M., Nakamura, T. and Kawahata, H. (2009) The 1,500-year climate oscillation in the mid-latitude North Pacific during the Holocene. Geology, 37, 591–594. 

*177. Mishima, M., Kawahata, H., Suzuki, A., Inoue, M., Okai, T. and Omura, A. (2009) Reconstruction of Paleoenvironment at 16 ka in the last glacial period by Faviidae coral collected from Ryukyus, southwestern Japan. Journal of Quaternary Science, doi:10.1002/jqs.1268. 

*176. Ishizaki, Y., Ohkushi, K., Ito, T. and Kawahata, H. (2009) Abrupt changes of intermediate-water oxygenation in the northwestern Pacific during the last 27 kyr. Geo-Marine Letters, 29, 125-131. 

*175. Nakazawa, T., Ueno, K., Kawahata, H., Fujikawa, M. and Kashiwagi, K. (2009) Facies stacking patterns in high-frequency sequences influenced by long-term sea-level change on a Permian Panthalassan oceanic atoll: An example from the Akiyoshi Limestone, SW Japan. Sedimentary Geology, 214, 35-48. 

*174. Kawahata, H., Yamamoto, H., Ohkuchi, K., Yokoyama, Y., Kimoto, K., Ohshima, H. and Matsuzaki, H. (2009) Changes of environments and human activity at the Sannai-Maruyama ruins in Japan during the mid-Holocene Hypsithermal climatic interval. Quaternary Science Reviews, 28, 964-974. 

*173. Kuwae, M., Hayami, Y., Oda, H,, Yamashita, A., Amano, A., Kaneda, A., Ikehara, M., Inouchi, Y., Omori, K., Takeoka, H. and Kawahata, H. (2009) Using foraminiferal Mg/Ca ratios to produce an ocean warming trend in the 20th century from coastal shelf sediments in the Bungo Channel, southwest Japan. The Holocene, 19, 285-294, doi: 10.1177/0959683608100573. 

*172. Takeuchi, M., Ono, Y., Itouga, M., Gupta, L.P., Sakakibara, H., Ota, H. and Kawahata, H. (2009) Chemistry of fly ash and cyclone ash leachate from waste materials and effects of ash leachates on bacterial growth, nitrogen-transformation activity, and metal accumulation. Journal of Hazardous Materials, 165, 967-973. 

*171. Takashima, R., Nishi, H., Hayashi, K., Okada, H., Kawahata, H., Yamanaka, T., Mampuku, M. (2009) Litho-, bio- and chemostratigraphy across the Cenomanian/Turonian boundary (OAE 2) in the Vocontian Basin of southeastern France. Palaeogeography, Palaeoclimatology, Palaeoecology, 273, 61-74. 

2008 

*170. Itaki, T., Minoshima, K. and Kawahata, H. (2008) Radiolarian flux at an IMAGES site at the western margin of the subarctic Pacific and its seasonal relationship to the Oyashio Cold and Tsugaru Warm currents. Marine Geology, 255, 131-148. 

*169. Chang, Y.P., Wang, W.L., Yokoyama, Y., Matsuzaki, H., Kawahata, H. and Chen, M.T. (2008) Millennial-scale planktic foraminifer faunal variability in the East China Sea during the past 40,000 years (IMAGES MD012404 from the Okinawa Trough). Terrestrial Atmospheric and Oceanic Sciences, 19, 389-401. 

168. Kawahata, H. (2008) Impact of toxic chemicals on the tropical and subtropical coastal environments by human activity. In: Department of Natural Environmental Studies Graduate School of Frontier Sciences, The University of Tokyo (ed.) Natural Environmental Studies for Sustainability, The University of Tokyo (Tokyo), 201-211. 

167. Inoue, M. Suzuki, A., Nohara, M. and Kawahata, H. (2008) Assessment of marine pollution in tropical and subtropical region using trace elements in coral skeletons, In: Alfred B. Gore (ed.) Environmental Research at the Leading Edge, Nova Science Publishers (New York), 267-292. 

*166. Kitada, Y., Kawahata, H., Suzuki, A. and Oomori, T. (2008) Distribution of pesticides and bisphenol A in sediments collected from rivers adjacent to coral reefs. Chemosphere, 71, 2082-2090. 

*165. Ando, A., Kaiho, K., Kawahata, H. and Kakegawa, T. (2008) Timing and magnitude of Early Aptian extreme warmth: Unraveling secular d18O variation in indurated pelagic carbonates at Deep Sea Drilling Project Site 463, central Pacific Ocean. Palaeogeography, Palaeoclimatology, Palaeoecology, 260, 463-476. 

*164. Kuroyanagi, A., Kawahata, H., Nish, N. and Honda, M.C. (2008) Seasonal to interannual changes in planktonic foraminiferal assemblages in the northwestern North Pacific: sediment trap results encompassing a warm period related to El NiNo. Palaeogeography, Palaeoclimatology, Palaeoecology, 262, 107-127. 

*163. Kuroyanagi, A., Tsuchiya, M., Kawahata, H. and Kitazato, H. (2008) Paleo-environmental implications of two genotypes of the planktonic foraminifer Globigerinoides ruber (white). Marine Micropaleontology, 68, 236-243. 

*162. Tsunoda, T., Kawahata, H., Suzuki, A., Minoshima, K. and Shikazono, N. (2008) East Asian Monsoon to El Niño/Southern Oscillation: a shift in the winter climate of Ishigaki Island accompanying the 1988/1989 regime shift, based on instrumental and coral records. Geophysical Research Letter, 35, 12, L13708. 

*161. Omata, T., Suzuki, A., Sato, T., Minoshima, K., Nomaru, E., Murakami, A., Murayama, S., Kawahata, H. and Maruyama, T. (2008) Effect of photosynthetic light intensity on carbon isotope composition in the coral skeleton: Long-term culture of Porites spp.. Journal of Geophysical Research, 113, G02014. 

*160. Suzuki, A., Yokoyama, Y., Kanda, H., Minoshima, K., Matsuzaki, H., Hamanaka, N. and Kawahata, H. (2008) Identification of 1771 Meiwa Tsunami deposits using a combination of radiocarbon dating and oxygen isotope microprofiling of emerged massive Porites boulders. Quaternary Geochronology, 3, 226-234. 

*159. Suzuki, A., Nakamura, T., Yamasaki, H. Minoshima, M. and Kawahata, H. (2007) Influence of water-flow on skeletal isotopic compositions of the branching coral Pocilopora damicornis. Coral Reefs, 27, 209-218. 

2007 

*158. Ohkushi, K., Uchida, M., Aoki, K., Yoneda, M., Ikehara, K., Minoshima, K., Kawahata, H., Tada, R., Murayama, M., Shibata, Y. (2007) Radiocarbon marine reservoir ages in the northwestern Pacific off Hokkaido Island, Japan, during the last deglacial period. Radiocarbon, 49, 963-968. 

*157. Yamaoka, K., Kawahata, H., Gupta, L.P., Ito, M. and Masuda, H. (2007) Thermal stabilities of amino acids in siliceous ooze under alkaline hydrothermal conditions. Organic Geochemistry, 38, 1897-1909. 

*156. Thamban, M., Kawahata, H. and Purnachandra Rao, V. (2007) Indian summer monsoon variability during the Holocene as recorded in sediments of the Arabian Sea: Timing and implications. Journal of Oceanography, 63, 1009-1020. 

*155. Inoue, M., Suzuki, A., Nohara, M., Hibino, K. and Kawahata, H. (2007) Empirical assessment of coral Sr/Ca and Mg/Ca ratios as climate proxies using colonies grown at different temperatures. Geophysical Research Letters, 34, 12, L12611. 

*154. Yoneda, M., Uno, H., Shibata, Y., Suzuki, R., Kumamoto, Y., Yoshida, K., Sasaki, T., Suzuki, A., and Kawahata, H. (2007) Radiocarbon marine reservoir ages in the western Pacific estimated by pre-bomb molluscan shells. Nuclear Instrument Method B, 259, 432-437. 

*153. Minoshima, K., Kawahata, H., Irino, T., Ikehara, K., Aoki, K., Uchida, M., Yoneda, M. and Shibata, Y. (2007) Deep water ventilation in the northwestern North Pacific during the last deglaciation and the early Holocene (15-5 cal. kyr B.P.) based on AMS 14C dating. Nuclear Instrument Method B, 259, 448-452. 

*152. Minoshima, K., Kawahata, H. and Ikehara, K. (2007) Changes in biological production in the mixed water region (MWR) of the northwestern North Pacific during the last 27 kyr. Palaeogeography, Palaeoclimatology, Palaeoecology, 254, 430-447. 

*151. Yamamura, M., Kawahata, H., Matsumoto, K., Takashima, R. and Nishi, H. (2007) Paleoceanography of the northwestern Pacific during the Albian. Palaeogeography, Palaeoclimatology, Palaeoecology, 254, 477-491. 

*150. Chen, Z.Q., Tong, J., Kaiho, K. and Kawahata, H. (2007) Onset of biotic and environmental recovery from the end-Permian mass extinction within 1-2 million years: A case study of the Lower Triassic of the Meishan section, South China. Palaeogeography, Palaeoclimatology, Palaeoecology, 252, 176-187. 

*149. Gupta, L.P. and Kawahata, H. (2007) ENSO related variations in biogeochemistry of AA and HA in settling particles along the equatorial Pacific Ocean. Journal of Oceanography, 63, 695-709. 

*148. Moriya, K., Wilson, P.A., Friedrich, O., Erbacher, J. and Kawahata, H. (2007) Testing for ice-sheets during the mid-Cretaceous greenhouse using glassy foraminiferal calcite from the mid-Cenomanian tropics on Demerara Rise. Geology, 35, 615-618. 

*147. Takeuchi, M., Kawahata, H., Gupta, L.P., Kita, N., Morishita, Y., Ono, Y., Komai, T. (2007) Arsenic Resistance and Removal by Marinomonas communis. J. Biotechnology Research, 127, 434-442. 

*146. Isozaki, Y., Kawahata, H. and Ota, A. (2007) A unique carbon isotope record across the Guadalupian-Lopingian (Middle-Upper Permian) boundary in mid-oceanic paleo-atoll carbonates: The high-productivity “Kamura event” and its collapse in Panthalassa. Global Planetary Change, 55, 21-38. 

*145. Gupta, L.P., Suzuki, A. and Kawahata, H. (2007) Endolithic aspartic acid as a proxy of fluctuations in coral growth. JGR Biogeosciences, 112 (G1): Art. No. G01001. 

2006 

*144. Gupta, L.P., Suzuki, A. and Kawahata, H. (2006) Aspartic acid concentrations in coral skeletons as recorders of past disturbances of metabolic rates. Coral Reefs, 25, 599-606. 

+143. Kawahata, H. (2006) Settling particles in the central North Pacific. In Kawahata, H. and Awaya, Y. (ed.) Global Climate Change and Response of Carbon cycle in the Equatorial Pacific and Indian Oceans and Adjacent Landmasses, Elsevier Oceanography Series Vol. 73, Elsevier (Amsterdam), 107-133. 

+142. Gupta, L.P. and Kawahata, H. (2006) Understanding biogeochemical processes in the Pacific Ocean on the basis of labile components of settling particles. In Kawahata, H. and Awaya, Y. (ed.) Global Climate Change and Response of Carbon cycle in the Equatorial Pacific and Indian Oceans and Adjacent Landmasses, Elsevier Oceanography Series Vol. 73, Elsevier (Amsterdam), 135-156. 

+141. Suzuki, A., Gagan, M.K. Kan, H., Edward, A., Siringane, F.P. Yonedaf, M., Kawahata, H. (2006) Coral records of the 1990s in the tropical northwest Pacific: ENSO, mass coral bleaching, and global warming. In Kawahata, H. and Awaya, Y. (ed.) Global Climate Change and Response of Carbon cycle in the Equatorial Pacific and Indian Oceans and Adjacent Landmasses, Elsevier Oceanography Series Vol. 73, Elsevier (Amsterdam), 211-238. 

*140. Ando, A., Kawahata, H. and Kakegawa, T. (2006) Sr/Ca ratios as indicators of varying modes of pelagic carbonate diagenesis in the ooze, chalk and limestone realms. Sedimentary Geology, 191, 37-53. 

*139. Kaiho, K., Chen, Z.-Q., Kawahata, H., Kajiwara, Y, and Sato, H. (2006) Close-up of the end-Permian mass extinction horizon recorded in the Meishan section, South China: Sedimentary, elemental and biotic characterization with a negative shift of sulfate sulfur isotope ratio. Palaeogeography, Palaeoclimatology, Palaeoecology, 239, 396-405. 

*138. Gupta, L.P., Kawahata, H., Takeuchi, M., Ohta, H. and Ono, Y. (2006) Impact of changes in redox conditions on leaching of some elements from MSW fly ash. Resource Geology, 56, 191-196. 

*137. Kawahata, H., Inoue, M., Nohara, M. and Suzuki, A. (2006) Stable isotope and chemical composition of pearls - Biomineralization in cultured pearl oysters in Ago Bay, Japan -. Journal of Oceanography, 62, 405-412. 

*136. Inoue, M., Hata, A., Suzuki, A., Nohara, M., Sikazono, N., Wyss, Y., Hantro, W.S., Donghuai, S. and Kawahata, H. (2006) Distribution and temporal changes of lead in the surface seawater in the western Pacific and adjacent seas derived from coral skeletons. Environmental Pollution, 144, 1045−1052. 

*135. Ito, M., Gupta, L.P., Masuda, H. and Kawahata, H. (2006) Thermal stability of amino acids in seafloor sediment in aqueous solution at high temperature. Organic Geochemistry, 37, 177-188. 

134. Omata, T., Suzuki, A. and Kawahata, H. (2006) Kinetic and metabolic isotope effects in coral skeletons. Proceedings of the 10th International Coral Reef Symposium, 557-566. 

133. Kitada, Y., Kawahata, H., Suzuki, A. and Oomari, T. (2006) Concentrations of nonylphenol and bisphenol A in the Okinawa Islands using liquid chromatography electrospray tandem mass spectrometry. Proceedings of the 10th International Coral Reef Symposium, 810-818. 

132. Suzuki, A., Hibino, K., Iwase, A. and Kawahata, H. (2006) Influences of metabolism and growth variations on skeletal oxygen and carbon isotope ratios in cultured Porites corals: temperature-controlled experiments. Proceedings of the 10th International Coral Reef Symposium, 547-556. 

*131. Sakamoto, T., Ikehara, M., Uchida, M., Aoki, K., Shibata, Y., Kanamatsu, T., Harada, N., Iijima, K., Katsuki, K., Asahi, H., Takahashi, K., Sakai, H. and Kawahata, H. (2006) Millennial-scale variations of sea-ice expansion in the southwestern part of the Okhotsk Sea during the past 120 kyr: Age model and ice-rafted debris in IMAGES Core MD01-2412. Global and Planetary Change, 53, 58-77. 

*130. Kawahata, H., Nohara, M., Aoki, K., Minoshima, K. and Gupta, L.P. (2006) Biogenic and abiogenic sedimentation in the northern East China Sea in response to sea-level change during the Late Pleistocene. Global and Planetary Change, 53, 108-121. 

*129. Gupta, L.P. and Kawahata, H. (2006) Downcore diagenetic changes in organic matter and implications for paleoproductivity estimates. Global and Planetary Change, 53, 122-136. 

*128. Kuroyanagi, A., Kawahata, H., Narita, H., Ohkushi, K. and Aramaki, T. (2006) Global and Planetary Change". The title of the manuscript is "Reconstruction of paleoenvironmental changes based on the planktonic foraminiferal assemblages off Shimokita in the northwestern North Pacific. Global and Planetary Change, 53, 92-107. 

*127. Omata, T., Suzuki, A., Kawahata, H. Nojima, S. and Hata, A. (2006) Oxygen and carbon stable isotope systematics in coral near its latitudinal limit: the coral response to low thermal stress. Global and Planetary Change, 53, 137-146. 

2005 

*126. Gupta, L.P., Kawahata, H., Takeuchi, M., Ohta, H. and Ono, Y. (2005) Temperature and pH dependence of some metals leaching from fly ash of municipal solid waste. Resources Geology, 55, 357-372. 

*125. Chang, Y.P., Wu, S.M., Wei, K.Y., Murayama, M., Kawahata, H. and Chen, M.T. (2005) Foraminiferal oxygen isotope stratigraphy and high-resolution organic carbon, carbonate records from the Okinawa Trough - (IMAGES MD012404 and ODP site 1202). Tetterstrial Atmospheric and Oceanic Sciences, 16, 57-73. 

*124. Takano, Y., Gupta, L.P., Kawahata, H., Marumo, K. (2005) Characterization of water-extractable amino acids in the sub-surface of semi-permafrost environments. Bulletin of the Chemical Society of Japan, 78, 1994-1999. 

*123. Yoshikawa, C., Nakatsuka, T. and Kawahata, H. (2005) Transition of low-salinity water in the Western Pacific Warm Pool recorded in the nitrogen isotopic ratios of settling particles. Geophysical Research Letters, 32, L14615. 

*122. Suzuki, A., Hibino, K., Iwase, A. and Kawahata, H. (2005) Intercolony variability of skeletal oxygen and carbon isotope signatures of cultured Porites corals: temperature-controlled experiments. Geochimica et Cosmochimica Acta, 69, 4453-4462. 

*121. Omata, T., Suzuki, A., Kawahata, H. and Okamoto, M. (2005) Annual fluctuation in stable carbon isotope of coral skeletons: The relative intensities of kinetic and metabolic isotope effects. Geochimica et Cosmochimica Acta, 69, 3007-3016. 

*120. Kawahata, H. (2005) Stable isotopic composition of two morphotypes of Globigerinoides ruber (white) in the subtropical gyre in the North Pacific. Paleontological Research, 9, 27-35. 

*119. Takano, Y., Marumo, K., Ebashi, T., Gupta, L.P., Kawahata, H., Kobayashi, K., Yamagishi, A. and Kuwabara, T. (2005) In situ ore formation experiment: amino acids and amino sugars trapped in artificial chimneys on deep-sea hydrothermal systems at Suiyo Seamount, Izu-Bonin Arc, Pacific Ocean. Bulletin of the Chemical Society of Japan. 78, 638-651. 

*118. Takano, Y., Marumo, K., Ebashi, T., Gupta, L. P., Kawahata, H., Yamagishi, A., Kobayashi, K., and Kuwabara, K. (2005) Addendum to [Bull. Chem. Soc. Japan., 78, 638-651 (2005)], Bulletin of Chemical Society of Japan, 78, 2082. 

*117. Ijiri, A., Wang, L., Oba, T. Kawahata, H., Huang, Chen-Yu, Huang, Chi-Yue (2005) Paleoenvironmental changes in the northern area of the East China Sea during the past 42,000 years. Palaeogeography, Palaeoclimatology, Palaeoecology, 219, 239-261. 

*116. Jickells, T., An, Z.S., Andersen, K.K., Baker, A.R., Bergametti, G., Brookes, N., Cao, J.J., Boyd, P.W., Duce, R.A., Hunter, K.A., Kawahata, H., Kubilay, N., LaRoche, J., Liss, P.S., Mahowald, N., Prospero, J.M., Ridgwekkm A.J., Tegen, I., and Torres, R. (2005) Global iron connections between desert dust, ocean biogeochemistry and climate. Science, 308, 67-71. 

2004 

*115. Kawahata, H. Ohta, H., Inoue, M., Suzuki, A. (2004) Endocrine disrupter nonylphenol and bisphenol A contamination in Okinawa and Ishigaki Islands, Japan - within coral reefs and adjacent river mouths -. Chemosphere, 55, 1519-1527. 

*114. Kawahata, H. and Ohshima, H. (2004) Vegetation and environmental record in the northern East China Sea. Global and Planetary Change, 41, 251-273. 

*113. Watanabe, T., Suzuki, A., Kawahata, H., Kan, H. and Ogawa, S. (2004) A 60-year isotopic record from a mid-Holocene fossil giant clam (Tridacna gigas) in the Ryukyu Islands: physiological and paleoclimatic implications. Palaeogeography, Palaeoclimatology, Palaeoecology, 212, 343-354. 

*112. Kuroyanagi, A. and Kawahata, H. (2004) Vertical distribution of living planktonic foraminifera in the Japan Sea and northwestern North Pacific Ocean. Marine Micropaleontology, 53, 173-196. 

*111. Takano, Y., Gupta, L.P., Kawahata, H., Marumo, K., Ishikawa, Y. and Kobayashi, K. (2004) Glucosamine and galactosamine in terrestrial organic matter and their correlation with other biochemical indicators. Bulletin of the Chemical Society of Japan, 77, 729-732. 

*110. Isozaki, Y., Yao, J., Matsuda, T., Sakai, H., Ji, Z., Shimizu, N., Kobayashi, N., Kawahata, H., Nishi, H., Takano, M. and Kubo, T. (2004) Stratigraphy of the middle-upper Permian and lowermost Triassic at Chaotian, Sichuan, China - Record of late Permian double mass extinction event -. Proceeding of Japan Academy, Ser. B., 80, 10-16. 

*109. Inoue, M., Suzuki, A., Nohara, M., Kan, H., Edward, A., and Kawahata, H. (2004) Coral skeletal tin and copper concentration at Pohnpei, Micronesia: Possible index for marine pollution by toxic anti-biofouling paints. Environmental Pollution, 129, 399-407. 

*108. Inoue, M., Nohara, M., Jab, H., and Suzuki, A. Kawahata, H. (2004) Concentrations of trace elements in carbonate reference materials coral JCp-1 and giant clam JCt-1 by inductively coupled plasma mass spectrometry. Geostandards and Geoanalytical Research, 28, 411-416. 

+107. Kawahata, H. and Gupta, L.P. (2004) Settling particles flux in response to El Nino/ Southern Oscillation (ENSO) in the equatorial Pacific. In Global environmental change in the ocean and on land (Shiomi, M. and Kawahata, H. ed.) Terra, Tokyo, 95-108. 

+106. Gupta, L.P. and Kawahata, H. (2004) Particulate amino acids and biogeochemical processes in the equatorial Pacific Ocean during the 1999–2001 La Nina event. In Global environmental change in the ocean and on land. In Global environmental change in the ocean and on land (Shiomi, M. and Kawahata, H. ed.) Terra-Pub, Tokyo, 109-120. 

+105. Suzuki, A., Kawahata, H. (2004) Reef water CO2 system and carbon production of coral reefs: Topographic control of system-level performance. In: Global Environmental Change in the Ocean and on land" (Shiomi, M. and Kawahata, H. ed.) Terra-Pub, Tokyo, 229-248. 

2003 

*104. Suzuki, A., Gagan, M.K., Fabricius, K., Isdale, P.J., Yukino, I., Kawahata, H. (2003) Skeletal isotope microprofiles of growth perturbations in Porites corals during the 1997-1998 mass bleaching event. Coral Reefs, 22, 357-369. 

*103. Eguchi, N.O., Ujiie, H and Kawahata, H. (2003) Seasonal variations in planktonic foraminifera at three sediment traps in the Subarctic, Transition and Subtropical zones of the central North Pacific Ocean. Marine Micropaleontology, 48, 149-163. 

*102 Kawahata, H., Oshima, H., Shimada, C. and Oba, T. (2003) Terrestrial - oceanic environmental change in the southern Okhotsk Sea during the Holocene. Quaternary International, 108, 67-76. 

*101. Kawahata, H. and Gupta, L.P. (2003) El Nino/ Southern Oscillation (ENSO) related variations in particle export fluxes in the western and central equatorial Pacific. Journal of Oceanography, 59, 663-670. 

*100. Gupta, L.P. and Kawahata, H. (2003) Vertical and latitudinal variations in amino acid fluxes and compositions of settling particles along 175°E in the North Pacific Ocean. Tellus B, 55, 445-455. 

*99. Suzuki, A. and Kawahata, H. (2003) Oceanic CO2 system and carbon budget of coral reef systems: an overview of observations in the fringing reefs, barrier reefs and atolls in the Indo-Pacific regions. Tellus B, ,55, 428-444. 

*98. Gupta, L.P. and Kawahata, H. (2003) Biogeochemical nature of settling POM in the Southwest Pacific: amino acids and hexosamines. Mar. Freshwater Research, 54, 259-270. 

*97. Moriya, K., Nishi, H., Kawahata, H., and Tanabe, K. (2003) Demersal habitat of Late Cretaceous ammonoids: Evidence from oxygen isotopes for the Campanian (Late Cretaceous) northwestern Pacific thermal structure. Geology, 31, 167-170. 

*96. Gupta, L.P. and Kawahata, H. (2003) Variations in Nature and Content of Organic Matter in the Hess Rise core during the last 220,000 yr: Amino acids and Hexosamines. Quaternary Research, 60, 394-403. 

*95. Ohkushi, K., Suzuki, A., Kawahata, H. and Gupta, L.P. (2003) Glacial-interglacial deep-water changes in the Northwestern Pacific inferred from individual foraminiferal d18O and d13C. Marine Micropaleontology, 48, 281-290. 

94. Kawahata, H. (2003) Fluctuations in the ocean environment within the equatorial Western Pacific during the Late Pleistocene. In Marine Environment: The past, present and future. The Fuwen Press, Kaohsiung, ISBN 957-555-601-1, 26-34. 

2002 

*93. Maeda, R., Kawahata, H. and Nohara, M. (2002) Fluctuation of biogenic and abiogenic sedimentation on the Shatsky Rise in the western North Pacific during the late Quaternary. Marine Geology, 189, 197-214. 

*92. Kuroyanagi, A., Kawahata, H., Nishi, H. and Honda, M.C. (2002) Seasonal change of planktonic foraminifera in the northwestern North Pacific Ocean. Deep-Sea Research II., 49, 5627-5646. 

*91. Kawahata, H. (2002) Settling and suspended particles in the Pacific. Deep-Sea Research II., 49, 5647-5664. 

*90. Gupta, L.P. and Kawahata, H. (2002) Impact of ENSO on the flux and composition of POM in the WPWP: Amino acids and hexosamines. Deep-Sea Research II., 49, 2769-2782. 

*89. Kawahata, H., Nishimura, A. and Gagan, M. (2002) Seasonal change in foraminiferal production in the western equatorial Pacific warm pool: evidence from sediment trap experiments. Deep-Sea Research II, 49, 2783-2801. 

*88. Kawahata, H. and Ohshima, H. (2002) Small latitudinal shift in the Kuroshio Extension during the glacial times evidenced by pollen transportation. Quaternary Science and Reviews, 21, 1705-1717. 

*87. Kawahata, H. (2002) Shifts in oceanic and atmospheric boundaries in the Tasman Sea (Southwest Pacific) during the Late Pleistocene: Evidence from organic carbon and lithogenic fluxes. Palaeogeography Palaeoclimatology Palaeoecology, 184, 225-249. 

*86. Okai, T., Suzuki1, A., Kawahata, H., Terashima, S. and Imai, N. (2002) Preparation of New GSJ Geochemical Reference Material: Coral JCp-1. Geostandard Newsletters, 26, 95-99. 

*85. Kawahata, H., Maeda, R. and Ohshima, H. (2002) Fluctuations in the terrestrial - ocean environments in the western equatorial Pacific during Late Pleistocene. Quaternary Research, 57, 1-11. 

2001 

*84. Tanaka, Y. and Kawahata, H. (2001) Seasonal occurrence of coccoliths in sediment traps from West Caroline Basin, equatorial West Pacific Ocean. Marine Micropaleontology, 43, 273-284. 

*83. Kaiho, K., Kajiwara, Y.,Nakano, T., Miura, Y., Kawahata, H., Tazaki, K., Ueshima, M., Chen, Z., and Shi, G.R. (2001) End-Permian catastrophe by a bolide impact: evidence of a gigantic release of sulfur from the mantle. Geology, 29, 815-818. 

*82. Suzuki, A., Gagan, M.K., De Deckker, P., Omura, A., Yukino, I. and Kawahata, H. (2001) Last interglacial coral record of enhanced insolation seasonality and seawater 18O enrichment in the sub-tropical northwestern Pacific. Geophysical Research Letters, 28, 3685-368. 

*81. Suzuki, A., Kawahata, H. and Ayukai, T. (2001) The Oceanic CO2 System and Carbon Budget in the Great Barrier Reef, Australia. Geophysical Research Letters, 28, 1,243-1,246. 

*80. Kawahata, H., Nohara, M. Ishizuka, H., Hasebe, S. and Chiba, H. (2001) Sr Isotope Geochemistry and Hydrothermal Alteration of the Oman Ophiolite. J. Geophysical Research, 106, 11,083-11,099. 

79. Aoki, S., Kohyama, N. and Kawahata, H. (2001) Clay mineralogy in samples from two sediment traps and a sediment core from the west Caroline Basin. Clay Science, 11, 417-430. 

2000 

*78. Kawahata, H. and Ishizuka, T. (2000) Amino acids in interstitial waters from ODP Sites 689 and 690 on the Maud Rise, Antarctic Ocean. Geochemical Journal, 34, 247-261. 

*77. Kawahata, H., Yukino, I. and Suzuki, A. (2000) Terrestrial influence on the Shiraho fringing reef, Ishigaki Island, Japan: high carbon input relative to phosphate. Coral Reefs, 19, 172-178. 

*76. Kawahata, H., Suzuki, A. and Ohta, H. (2000) Export Fluxes in the Western Pacific Warm Pool. Deep-Sea Research -I, 47, 2061-2091. 

*75. Suzuki, A., Kawahata, H., Tanimoto, Y., Tsukamoto, H., Gupta, L.P. and Yukino, I. (2000) Skeletal isotopic record of a Porites coral during the 1998 mass bleaching vent. Geochemical Journal, 34, 321-329. 

*74. Toyofuku, T., Kitazato, H., Kawahata, H., Tsuchiya, M. and Nohara, M. (2000) Evaluation of Mg/Ca thermometry in formianifera -comparison between experimental results and measurements in nature -. Paleoceanography, 15, 456-464. 

*73. Kawahata, H. and Murayama, M. (2000) Radiocarbon of settling particles from the hemipelagic region. Nuclear Instruments and Methods B, 172, 485-489. 

*72. Ohkushi, K., Thomas, E. and Kawahata, H. (2000) Abyssal benthic foraminifera from the Northwestern Pacific (Shatsky Rise) during the last 298 kyr. Marine Micropaleontology, 38, 119-147. 

*71. Kawahata, H., Suzuki, A., Ayukai, T. and Goto, K. (2000) Distribution of the fugacity of carbon dioxide in the surface seawater of the Great Barrier Reef. Marine Chemistry, 72, 257-272. 

*70. Gupta, L.P. and Kawahata, H. (2000) Amino acid and hexosamine compositions and flux of sinking particulate matter into the equatorial Pacific at 175° longitude. Deep-Sea Research -I, 47, 1938-1960. 

*69. Kawahata, H. and Ohta, H. (2000) Sinking and suspended particles in the Southwest Pacific. Marine Freshwater Research, 51, 113-126. 

*68. Kawahata, H., Okamoto, T., Matsumoto, E. and Ujiie, H. (2000) Fluctuations of eolian flux and ocean productivity in the mid-latitude north Pacific during the last 200 kyr. Quaternary Science and Reviews, 19, 1279-1291. 

67. Kuroyanagi, A. Kawahata, H., Nishi, H. and Honda, M. (2000) Seasonal change of Planktonic Foraminifera in the Northwestern North Pacific Ocean. Proceeding of Techno-Ocean '2000 International Symposium. In Techno-Ocean '2000 Organizing Committee (Eds.), Kobe, 859-862. 

66. Gupta, L.P. and Kawahata, H. (2000) El Nino influenced changes in the biogeochemical nature and flux of settling particulates at 175°E in the equatorial Pacific. Proceeding of Techno-Ocean '2000 International Symposium. In Techno-Ocean '2000 Organizing Committee (Eds.), Kobe, 885-888. 

1999 

*65. Ohkouchi, N., Kawamura, K., Kawahata, H., and Okada, H. (1999) Depth ranges of alkenone production in the Central Pacific Ocean. Global Biogeochemical Cycles 13, 695-704. 

*64. Ohkouchi, N., Kawamura, K. and Kawahata, H. (1999) Distribution of three- to seven-ring polynuclear aromatic hydrocarbons on the deep sea floor in the central Pacific. Environmental Science Technology, 33, 3086-3090. 

*63. Kaiho, K., Kajiwara, Y., Tazaki, K., Ueshima, M., Takeda, N., Kawahata, H., Arinobu, T., Ishiwatari, R., Hirai, A. and Lamolda, M.A. (1999) Rapid decrease in oceanic primary productivity and dissolved oxygen levels at the Cretaceous/Tertiary boundary and subsequent warming at Caravaca, Spain. Paleoceanography, 14, 511-524. 

*62. Kawahata, H. (1999) Fluctuations in the ocean environment within the Western Pacific Warm Pool during Late Pleistocene. Paleoceanography, 14, 639-652. 

*61. Kawahata, H., Suzuki, A. and Goto, K. (1999) PCO2 spatial distribution in coral reefs of Majuro Atoll, Marshall Islands. Geochemical Journal, 33, 295-303. 

*60. Suzuki, A., Saito, I. and Kawahata, H. (1999) Temperature - skeletal d18O relationship of Porites australiensis from Ishigaki Islands, the Ryukyus, Japan. Geochemical Journal, 33, 419-428. 

*59. Eguchi, N., Kawahata, H. and Taira, A. (1999) Seasonal response of planktonic foraminifera to the ocean surface condition: Sediment trap results from the northcentral Pacific Ocean. Journal of Oceanography, 55, 681-691. 

*58. Suzuki, A. and Kawahata, H. (1999) Partial pressure of carbon dioxide in coral reef lagoon waters: comparative study of atolls and barrier reefs in the Indo-Pacific Oceans. Journal of Oceanography, 55, 731-745. 

*57. Kawahata, H., Ohkushi, K. and Hatakeyama, Y. (1999) Comparative Late Pleistocene paleoceanographic changes in the mid latitude boreal and austral western Pacific. Journal of Oceanography, 55, 747-761. 

56. Kawahata, H., Suzuki, A., Ayukai, T. and Goto, K. (1999) Distribution of surface seawater partial CO2 pressure in the Great Barrier Reef - Potential source of CO2 by coral reef ecosystem -. Proceedings of the 2nd International Symposium CO2 in the oceans, Tsukuba, January 1999, CGER-I037-'99, CGER/NIES, Tsukuba, Japan, 421. 

1998 

*55. Kawahata, H., Suzuki, A. and Ahagon, N. (1998) Biogenic sediments in the West Caroline Basin, the western equatorial Pacific during the last 330 kyr. Marine Geology, 149, 155-176. 

*54. Kawahata, H., Suzuki, A. and Ohta, H. (1998) Sinking particles between the Equatorial and Subarctic regions (0N-46N) in the Central Pacific. Geochemical Journal, 32, 125-133. 

*53. Yamazaki, T. and Kawahata, H. (1998) Organic carbon flux controls the morphology of magnetofossils in marine sediments. Geology, 26, 1064-1066. 

*52. Kawahata, H., Yamamuro, M. and Ohta, H. (1998) Seasonal and vertical variations of sinking particle fluxes in the West Caroline Basin. Oceanologica Acta, 21, 521-532. 

51. Eguchi, N., Kawahata, H. and Taira, A. (1998) Seasonal Succession of Planktonic Foraminifera in the Central North Pacific Ocean Proceeding of Techno-Ocean '96 International Symposium. In Techno-Ocean '98 Organizing Committee (Eds.), Kobe, 193-196. 

50. Kawahata, H., Saito, I. and Suzuki, A. (1998) Terrestrial inputs potentially influence carbon cycle and metabolism in the Shiraho reef. Proceeding of Techno-Ocean '98 International Symposium. In Techno-Ocean '98 Organizing Committee (Eds.), Kobe, 381-384. 

49. Kawahata, H. (1998) Land-ocean interaction in the equatorial western Pacific during the late Pleistocene. International workshop on ultra-long-term cryogenic preservation network of biological and environmental specimens. Proceedings of international workshop on ultra-long-term cryogenic preservation network of biological and environmental specimens In T. Shibata and T. Eto, eds., 138-143, Osaka, Japan. 

1997 

*48. Ohkouchi, N., Kawamura, K., Kawahata, H. and Taira, A. (1997) Latitudinal distributions of terrestrial biomarkers in the sediments from the central Pacific. Geochimica et Cosmochimica Acta, 61, 1911-1918. 

*47. Kawahata, H., Suzuki, A. and Goto, K. (1997) High PCO2 in the lagoonal surface water of Palau Barrier Reef and Majuro Atoll - Coral reef ecosystem works as a source of atmospheric CO2 -. Coral Reefs, 16, 261-266. 

*46. Kawahata, H. and Eguchi, N. (1997) Paleoproductivity in the North Fiji Basin during the late Pleistocene. Journal of Oceanography, 53, 355-364. 

*45. Kawahata, H., Kusakabe, M. and Scott, S.D. (1997) Sulfate in plagiogranites from the Troodos ophiolite, Cyprus. Geochemical Journal, 31, 119-124. 

*44. Kawahata, H. Ahagon, N. and Eguchi, N. (1997) Carbonate preservation variation in the deep sea of the Caroline Basin during the last 300kyr. Geochemical Journal, 31, 85-103. 

43. Suzuki, A., Kawahata, H., and Goto, K. (1997) Reef Water CO2 system and carbon cycle in Majuro Atoll, the Marshall Islands in the Central Pacific. Proceedings of the 8th International Coral Reef Symposium, 971-976. 

42. Kawahata, H. and Ohta, H. (1997) Carbon removal rate with sinking particles along 175°E in the Western Pacific. Proceeding of the Third International Conference on Asian Marine Geology, Cheju, October, 17-21. 

1996 

*41. Kawahata, H. and Eguchi, N. (1996) Biogenic sediments in the Eauripik Rise of the equatorial western Pacific during the last 265kyr. Geochemical Journal, 30, 201-215. 

40. Toyofuku, T., Kitazato, H. and Kawahata, H. (1996) Planktonic foraminifer in sinking particle obtained from middle latitude. Proceeding of Techno-Ocean '96 International Symposium. In Techno-Ocean '96 Organizing Committee, eds., 561-566, Kobe, Japan. 

39. Eguchi, N., Ujiie, H. and Kawahata, H. (1996) Planktonic foraminifer in sinking particle obtained from middle latitude. Proceeding of Techno-Ocean '96 International Symposium. In Techno-Ocean '96 Organizing Committee, eds., 329-333, Kobe, Japan. 

38. Okamoto, T., Matsumoto, E., and Kawahata, H. (1996) The fluctuation of eolian dust in the Northwest Pacific during past 150kyr. Proceeding of Techno-Ocean '96 International Symposium. In Techno-Ocean '96 Organizing Committee, eds., 323-327, Kobe, Japan. 

37. Suzuki, A., Kawahata, H. and Goto, K. (1996) Coral reefs work as a source of CO2 -Majuro Atoll, South Male Atoll of Maldives, Palau Barrier Reef-. Proceeding of Techno-Ocean '96 International Symposium. In Techno-Ocean '96 Organizing Committee, eds., 305-310, Kobe, Japan. 

36. Kawahata, H., Ohta, H. and Suzuki, A. (1996) Organic carbon flux by sinking particles in the Western Pacific. Proceeding of Techno-Ocean '96 International Symposium. In Techno-Ocean '96 Organizing Committee, eds., 335-340, Kobe, Japan. 

+35. Kawahata, H., Suzuki, A., Eguchi, N. and Ohta, H. (1996) Export production in the western Pacific. Proceeding of Oceanology 96, 3, 243-255, Spearhead Exhibitions Ltd., New Malden Surray, UK. 

1995 

*34. Kawahata, H., Eguchi, N. and Suzuki, A. (1995) The record of late Pleistocene biogenic sedimentation in the western Pacific. Proc. 8th International water-rock interaction, 255-258, Balkema, Rotterdam. 

*33. Ohkouchi, N., Kawahata, H., Okada, M., Murayama, M. and Taira, A. (1995) Benthic foraminifera cadmium record from western equatorial Pacific. Marine Geology, 127,167-180. 

1994 

*32. Ohkouchi, H., Kawahata, H., Murayama, M., Okada, M., Nakamura, T. and Taira, A. (1994) Was deep water formed in the North Pacific during the late Quaternary? : cadmium evidence from the northwest Pacific. Earth Planetary Science Letters, 124, 185-194. 

31. Ohkouchi, N., Kawamura,K, Kawahata, H., and Taira, A. (1994) Organic geochemistry of deep sea sediments: how it contributes to the paleoceanography. In Tsunogai S. et al., Proceedings of the 1994 Sapporo IGBP Symposium, 533-538. 

30. Kawahata, H., Suzuki A., and Ahagon, H. (1994) The fluctuation of the mass accumulation rate of organic carbon as well as primary productivity during the last 300 kyr in the West Caroline Basin, the western equatorial Pacific. In Tsunogai S. et al., Proceedings of the 1994 Sapporo IGBP Symposium, 539-544. 

29. Kawahata, H. (1994) Sinking particulate matter and the vertical carbon flux through the water column in the West Caroline Basin. In Yoshida, K. et al., Proceeding of Techno-Ocean '94 International Symposium, Kobe, 427-431. 

1993 

*28. Chudaev, O.V., Kurnosov, V.B., Kawahata, H., Khanchuk, A.I., Petrachenko, E.D., and Ratkin, V.V. (1993) Hydrothermal metamorphism of extrusive-dike complex in the Kuyul ophiolitic terrace of North Kamchatka and ore formation. Resource Geology Special Issue, No.17, 132-137. 

*27. Kawahata, H. and Ishizuka, T. (1993) Amino acids in the sediments and interstitial waters from ODP Holes 677B and 678B in the Panama Basin. Oceanologica Acta, 16, 373-379. 

1992 

+26. Kawahata, H. and Ishizuka, T. (1992) Amino acids in the interstitial waters from ODP Sites 790 and 791 in the Izu-Bonin Island Arc. In Taylor, B., Fujioka, K. et al., Initial Reports of ODP, 126, Washington (U.S.Govt. Printing Office), 531-540. 

1991 

25. Kawahata, H., Scott, S.D., and Iiyama, J.T. (1991) The chemical and isotopic composition of hydrothermal solutions which produced greenstones in DSDP Hole 504B, Costa Rica Rift. In Troodos 87, Ophiolites and Oceanic Lithosphere. eds. by Constantinou, G. and Robinson, P.T., Geological Survey of Cyprus, p.733. 

24. Kawahata, H., Aoki, S., Scott, D.S., and Ishizuka, T. (1991) Geochemistry of sediments from Sites 677 and 678. Bulletin Geological Survey of Japan, 42, 199-220. 

Before 1990 

*23. Kawahata, H. and Scott, D.S. (1990) Strontium isotopes and water-rock interaction of the Agrokipia 'B' stockwork deposit in the Troodos ophiolite, Cyprus: a fossil subseafloor ore body. Geochemical Journal, 24, 349-356. 

*22. Kawahata, H. (1990) Chemical properties and evolution of mid-ocean ridge hydrothermal systems - Flow system approach -. Geochemical Journal, 23, 255-268. 

+21. Ishizuka, T., Kodama, Y., Kawahata, H., and Ittekkot, V. (1990) Preliminary data on dissolved heavy metals in interstitial water from the Bay of Bengal, Leg 116. In Cochran, J.R., Stow, D.A.V. et al., Initial Reports of ODP, 116, Washington (U.S.Govt. Printing Office), 145-154. 

+20. Ishizuka, T., Ittekkot, V., and Kawahata, H. (1990) Geochemistry of amino acids in the interstitial water, Leg 116. In Cochran, J.R., Stow, D.A.V. et al., Initial Reports of ODP, 116, Washington (U.S.Govt. Printing Office), 141-144. 

+19. Kawahata, H., Ishizuka, T., and Nagao, T. (1990) Amino acids in the interstitial waters from ODP Site 695 in the Weddell Sea, Antarctic Ocean. In Barker, P.F., Kennett, J.P. et al., Initial Reports of ODP, 113, Washington (U.S.Govt. Printing Office), 179-187. 

*18. Becker, K., Sakai, A., Adamson, A.C., Alexandrovich, J., Alt, J.C., Anderson, R.N., Bideau, D., Gable, R., Herzig, P.M. Herzig, Houghton, S., Ishizuka, H., Kawahata, H., Kinoshita, H., Langseth, M.G., Lovell, M.A., Malpas, J., Masuda, H., Merrill, R.B., Morin, R.H., Mottl, M.J., Pariso, J.E., Pezard, P., Phillips, J., Sparks, J. and Uhlig, S. (1989) Drilling Deep into young oceanic crust, Hole 504B, Costa Rica Rift. Reviews of Geophysics, 27, 79-102. 

+17. Kawahata, H. and Ishizuka, T. (1989) Organic property of sediments and amino acids in interstitial waters from the flank of Costa Rica Rift, Galapagos Spreading Center (ODP Sites 677 and 678). In Becker, K., Sakai, J. et al., Initial Reports of ODP, 111, Washington (U.S. Govt. Printing Office), 215-225. 

16. Kawahata, H., Scott, S.D., and Kusakabe, M. (1989) Hydrothermal fluids in oceanic crust-seawater interaction from Troodos ophiolite. Proceedings of the 6th International Symposium on Water-Rock Interaction/Malvern. 373-375. 

*15. Kawahata, H. and Shikazono, N. (1988) Sulfur isotope and total sulfur studies of basalts and greenstones from Hole 504B, Costa Rica Rift: Implications for hydrothermal alteration. Canadian Mineralogist, 26, 555-565. 

+14. Becker, K., Sakai, H., Merrill, R.B., Adamson, A.C., Alt, J.C., Anderson, R.N., Bideau, D., Gable, R., Herzig, P.M., Houghton, S., Ishizuka, H., Kawahata, H., Kinoshita, H., Lovell, M.A., Malpas, J., Masuda, H., Morin, R.H., Mottle, M.J., Pariso, J.E., Pezard, P., Phillips, J., Sparks, J. and Uhling, S. (1988) Costa Rica Rift 3. Site 504: Costa Rica Rift. Proceedings of the Ocean Drilling Program, Part A, 111, 253-346. 

+13. Becker, K., Sakai, H., Merrill, R.B., Adamson, A.C., Alt, J.C., Anderson, R.N., Bideau, D., Gable, R., Herzig, P.M., Houghton, S., Ishizuka, H., Kawahata, H., Kinoshita, H., Lovell, M.A., Malpas, J., Masuda, H., Morin, R.H., Mottle, M.J., Pariso, J.E., Pezard, P., Phillips, J., Sparks, J. and Uhling, S. (1988) Costa Rica Rift 3. Site 504: Costa Rica Rift. Proceedings of the Ocean Drilling Program, Part A, 111, 35-251. 

+12. Becker, K., Sakai, H., Merrill, R.B., Adamson, A.C., Alt, J.C., Anderson, R.N., Bideau, D., Gable, R., Herzig, P.M., Houghton, S., Ishizuka, H., Kawahata, H., Kinoshita, H., Lovell, M.A., Malpas, J., Masuda, H., Morin, R.H., Mottle, M.J., Pariso, J.E., Pezard, P., Phillips, J., Sparks, J. and Uhling, S. (1988) Costa Rica Rift 1. Introduction and Explanatory Notes. Proceedings of the Ocean Drilling Program, Part A., 111, 5-21. 

*11. Shikazono, N. and Kawahata, H. (1987) Compositional differences in chlorite from hydrothermally altered rocks and hydrothermal ore deposits. Canadian Mineralogist, 25, 465-474. 

*10. Kawahata, H., Kusakabe, M., and Kikuchi, Y. (1987) Strontium, oxygen, and hydrogen isotope geochemistry of hydrothermally altered rocks in DSDP Hole 504B, Costa Rica Rift. Earth Planetary Science Letters, 85, 343-355. 

+9. Leg 111 Scientific Drilling Party (including Kawahata) (1987) Costa Rica Rift hole deepened and logged. Geotimes, 8, 14-16. 

+8. Leg 111 Shipboard Scientific Party (including Kawahata) (1987) Ocean Drilling Program. New from a deepening hole. Nature, 325, 482-485. 

*7. Fujii, S., Nasu, N., Smith, A.J., Fuji, N., Mizutani, Y., Shimakura, M., K., Igarashi, C., Muramoto, J., Takemura, T., Shimoda, T., Sam, B.J., Fujioka, K., Mappa, H., Kawahata, H., Kong, Y., and Tanaka, T. (1986) Submerged forest off Nyuzen, Kurobegawa alluvial fan, Toyama Bay, Central Japan. Boreas, 15, 265-277. 

*6. Ishizuka, T., Ittekkot, V., Degens, E.T. and Kawahata, H. (1986) Preliminary data on dissolved organic carbon and sugar in interstitial water from the Mississippi Fan and Orca and Pigmy Basins, Deep Sea Drilling Project Leg 96. Initial Reports of DSDP, 96, Washington (U.S. Govt. Printing Office), 729-732. 

*5. Ishizuka, T., Kawahata, H. and Aoki, S. (1986) Interstitial water geochemistry and clay mineralogy of the Mississippi fan and Orca and Pigmy basins, Deep Sea Drilling Project Leg 96. Initial Reports of DSDP, 96, Washington (U.S. Govt. Printing Office), 711-728. 

*4. Kawahata, H., Fujioka, K. and Ishizuka, T. (1985) Sediments and interstitial water at Sites 582 and 584, the Nankai Trough and the Japan Trench landward slope. Initial Reports of DSDP, 87, Washington (U.S. Govt. Printing Office), 865-875. 

*3. Kinoshita, H., Furuta, T. and Kawahata, H. (1985) Magnetic properties and alteration in basalt, Hole 504B, Deep Sea Drilling Project Leg 83. Initial Reports of DSDP, 83, Washington (U.S. Govt. Printing Office), 331-338. 

*2. Kawahata, H. and Furuta, T. (1985) Sub-sea-floor hydrothermal alteration in the Galapagos Spreading Center. Chemical Geology, 49, 259-274. 

*1. Nasu, N., Fujii, S., Fujioka, K., Igarashi, C., Kawahata, H., Mappa, H., Konishi, K., Tanaka, T. and Shimoda, T. (1983) Remnants of an ancient forest on the continental shelf of northwest Japan. Boreas, 12, 13-16.