Publication List

Original Papers (click here)
Reports, Proceedings, etc. (click here)
Books (click here)
Awards (click here)
Patents (click here)

Original Papers

(152) Tsunogai, U., T. Miyauchi, T. Ohyama, D.D. Komatsu, M. Ito, and F. Nakagawa, Quantifying nitrate dynamics in a mesotrophic lake using triple oxygen isotopes as tracers, Limnology and Oceanography, in press.

(151) Suzuki, Y., K. Ino, A. Hernsdorf, U. Konno, M. Kouduka, K. Yanagawa, M. Sunamura, A. Hirota, Y. Togo, K. Ito, A. Fukuda, T. Iwatsuki, T. Mizuno, D. Komatsu, U. Tsunogai, T. Ishimura, Y. Amano, B. Thomas, J. Banfield, and S. Kato (2018) Ecological and genomic profiling of anaerobic methane-oxidizing archaea in a deep granitic environment. The ISME Journal, 12, 31–47.

(150) Toki, T., K. Kawamura, U. Tsunogai, and T. Gamo (2017) Microbial metabolism inferred from chemical and isotopic compositions of pore water around a banana discovered on the deep-sea floor, JAMSTEC Report of Research and Development, 25, 1-12.

(149) 角皆 潤 (2017) 「高感度安定同位体質量分析に基づく海洋地球化学の革新(第31回海洋化学学術賞石橋賞受賞記念論文)」 海洋化学研究, Vol. 30, Issue 1, 3-17.
[contents] [pdf]

(148) Toki, T., D. Iwata, U. Tsunogai, D.D Komatsu, Y. Sano, N. Takahata, H. Hamasaki, J. Ishibashi (2017) Formation of gas discharging from Taketomi submarine hot spring off Ishigaki Island in the southern Ryukyu Islands, Japan. Journal of Volcanology and Geothermal Research, 330, 24-35.

(147) Miyakawa, K., E. Ishii, A. Hirota, D.D Komatsu, K. Ikeya, U. Tsunogai (2017) The role of low-temperature organic matter diagenesis in carbonate precipitation within a marine deposit. Applied Geochemistry, 76, 218–231.

(146) Tsunogai, U., L. Cheng, M. Ito, D. D. Komatsu, F. Nakagawa, and H. Shinoara (2016) Remote determinations on fumarole outlet temperatures in an eruptive volcano. Geophysical Research Letters, 43, 22, 11620-11627.

(145) Toki, T., A. Hamamoto, M. Tawata, J. Miyazaki, K. Nakamura, M. Abe, K. Takai, Y. Sano, N. Takahata, U. Tsunogai, J. Ishibashi (2016) Methanogens in H2-rich hydrothermal fluids resulting from phase separation in a sediment-starved, basalt-hosted hydrothermal system. Chemical Geology, 447, 30, 208-218.

(144) Nobuhara, T., D. Onda, T. Sato, H. Aosawa, T. Ishimura, A. Ijiri, U. Tsunogai, N. Kikuchi, Y. Kondo, and S. Kiel (2016) Mass occurrence of the enigmatic gastropod Elmira in the Late Cretaceous Sada Limestone seep deposit in southwestern Shikoku, Japan. Paläontologische Zeitschrift, 90, 4, 701–722.

(143) Sadekov, A., K. Darling, T. Ishimura, C. Wade, K. Kimoto, A. Singh, P. Anand, D. Kroon, S. Jung, G. Ganssen, R. Ganneshram, U. Tsunogai, and H. Elderfield (2016) Geochemical imprints of genotypic variants of Globigerina bulloides in the Arabian Sea. Paleoceanography, 31, 10, 1440–1452.

(142) Toki, T., M. Itoh, D. Iwata, S. Ohshima, R. Shinjo, J. Ishibashi, U. Tsunogai, N. Takahata, Y. Sano, T. Yamanaka, A. Ijiri, N. Okabe, T. Gamo, Y. Muramatsu, Y. Ueno, S. Kawagucci, and K. Takai (2016) Geochemical characteristics of hydrothermal fluids at Hatoma Knoll in the southern Okinawa Trough. Geochemical Journal, 50, 6, 493-525.

(141) Wen, H.-Y., Y. Sano, N. Takahata, Y. Tomonaga, A. Ishida, K. Tanaka, T. Kagoshima, K. Shirai, J. Ishibashi, H. Yokose, U. Tsunogai, T.F. Yang (2016) Helium and methane sources and fluxes of shallow submarine hydrothermal plumes near the Tokara Islands, Southern Japan. Scientific Reports, 6,  Article number: 34126, doi:10.1038/srep34126.

Kagoshima, T., Y. Sano, N. Takahata1, A. Ishida, Y. Tomonaga, E. Roulleau, D. L. Pinti, T. P. Fischer, T. Lan, Y. Nishio and U. Tsunogai (2016) Spatial and temporal variations of gas geochemistry at Mt. Ontake, Japan. Journal of Volcanology and Geothermal Research, 325, 179-188.

(139) Yamazaki, A., T. Watanabe, U. Tsunogai, F. Iwase, H. Yamano (2016) A 150-year variation of the Kuroshio transport inferred from coral nitrogen isotope signature. Paleoceanography, 31, 6, 838-846.

Tsunogai, U., T. Miyauchi, T. Ohyama, D.D. Komatsu, F. Nakagawa, Y. Obata, K. Sato, and T. Ohizumi (2016) Accurate and precise quantification of atmospheric nitrate in streams draining land of various uses by using triple oxygen isotopes as tracers. Biogeosciences, 13, 3441-3459.
[abstract] [pdf]

(137) Ino, K., U. Konno, M. Kouduka, A. Hirota, Y. Togo, A. Fukuda, D. Komatsu, U. Tsunogai, A.S. Tanabe, S. Yamamoto, T. Iwatsuki, T. Mizuno, K. Ito, Y. Suzuki (2016) Deep Microbial Life in High-Quality Granitic Groundwater from Geochemically and Geographically Distinct Underground Boreholes. Environmental Microbiology Reports, 8, 2, 285-94.

(136) Tsunogai, U., and F. Nakagawa (2016) Tracing the origin and fate of atmospheric nitrate by using stable isotopes. Earozoru Kenkyu, Vol.31, No.1, p.5-14 (in Japanese with English abstract).

(135) The GEOTRACES Group (2015) The GEOTRACES Intermediate Data Product 2014. Marine Chemistry, 177, 1-8.

(134) Ishibashi, J., U. Tsunogai, T. Toki, N. Ebina, T. Gamo, Y. Sano, H. Masuda, H. Chiba (2015) Chemical composition of Hydrothermal fluids in the central and southern Mariana trough backarc basin. Deep-Sea Research Part II, 121, 126-136.

(133) Gamo, T., K. Okamura, H. Hatanaka, H. Hasumoto, D. Komatsu, M. Chinen, M. Mori, J. Tanaka, A. Hirota, U. Tsunogai, K. Tamaki (2015) Hydrothermal plumes in the Gulf of Aden, as characterized from light transmission, Mn, Fe, CH4 and δ13C-CH4 anomalies. Deep-Sea Research Part II, 121, 62-70.

(132) Yamanaka, T., H. Nagashio, R. Nishio, K. Kondo, T. Noguchi, K. Okamura, T. Nunoura, H. Makita, K. Nakamura, H. Watanabe, K. Inoue, T. Toki, K. Iguchi, U. Tsunogai, R. Nakada, S. Ohshima, S. Toyoda, J. Kawai, N. Yoshida, A. Ijiri, and M. Sunamura (2015) Tarama Knoll: Geochemical and Biological Profiles of Hydrothermal Activity. In: Subseafloor Biosphere Linked to Hydrothermal Systems: TAIGA Concept, Ishibashi, J., Okino, K., Sunamura, M. (Eds.), pp.497-504, Springer Japan, DOI: 10.1007/978-4-431-54865-2_40.

(131) Toki, T., J. Ishibashi, T. Noguchi, M. Tawata, U. Tsunogai, T. Yamanaka, and K. Nakamura (2015) Chemical and Isotopic Compositions of Hydrothermal Fluids at Snail, Archaean, Pika, and Urashima Sites in the Southern Mariana Trough. In: Subseafloor Biosphere Linked to Hydrothermal Systems: TAIGA Concept, Ishibashi, J., Okino, K., Sunamura, M. (Eds.), pp.587-602, Springer Japan, DOI: 10.1007/978-4-431-54865-2_45.

Yamazaki, A., T. Watanabe, U. Tsunogai, H. Hasegawa, and H. Yamano (2015) The coral δ15N record of terrestrial nitrate loading varies with river catchment land use. Coral Reefs, 34, 1, 353-362.

(129) Suzuki, Y., U. Konno, A. Fukuda, D.D. Komatsu, A. Hirota, Y. Togo, N. Morikawa, H. Hagiwara, D. Aosai, T. Iwatsuki, U. Tsunogai, S. Nagao, K. Ito, T. Mizuno (2014) Biogeochemical Signals from Deep Microbial Life in Terrestrial Crust, PLoS ONE, 9(12), e113063, doi:10.1371/journal.pone.0113063.

(128) Toki, T., R. Higa, A. Ijiri, U. Tsunogai and J. Ashi (2014) Origin and transport of pore fluids in the Nankai accretionary prism inferred from chemical and isotopic compositions of pore water at cold seep sites off Kumano. Earth Planets and Space, 66, 137.
[abstract] [PDF link: 1.1 MB] [doi:10.1186/s40623-014-0137-3]

(127) Tsunogai, U., Komatsu, D. D., Ohyama, T., Suzuki, A., Nakagawa, F., Noguchi, I., Takagi, K., Nomura, M., Fukuzawa, K., and Shibata, H. (2014) Quantifying the effects of clear-cutting and strip-cutting on nitrate dynamics in a forested watershed using triple oxygen isotopes as tracers. Biogeosciences, 11, 5411–5424.
[abstract] [PDF link: 2.1 MB] [doi:10.5194/bg-11-5411-2014]

(126) Zhang, D., C. Zhang, Z. Li, D. Suzuki, D.D Komatsu, U. Tsunogai, and A. Katayama (2014) Electrochemical Stimulation of Microbial Reductive Dechlorination of Pentachlorophenol Using Solid-State Redox Mediator (Humin) Immobilization. Bioresource Technology, 164, 232–240.

(125) Tanimoto, H., S. Kameyama, Y. Omori, S. Inomata and U. Tsunogai (2014) High-Resolution Measurement of Volatile Organic Compounds Dissolved in Seawater Using Equilibrator Inlet-Proton Transfer Reaction-Mass Spectrometry (EI-PTR-MS). In: Western Pacific Air-Sea Interaction Study (Eds. M. Uematsu, Y. Yokouchi, Y. W. Watanabe, S. Takeda, and Y. Yamanaka), pp. 89-115, doi:10.5047/w-pass.a02.001, TERRAPUB.

(124) Kawada, Y., T. Toki, M. Kinoshita, M. Joshima, R. Higa, T. Kasaya, U. Tsunogai, K. Nishimura, K. Kisimoto (2014) Tracing geologically constrained fluid flow pathways using a combination of heat flow measurements, pore water chemistry, and acoustic imaging near the deformation front of the Nankai Trough off the Muroto Peninsula, Japan. Tectonophysics, 618, 121-137.

(123) Notsu, K., R. Sohrin, H. Wada, T. Tsuboi, H. Sumino, T. Mori, U. Tsunogai, P.A. Hernandez, Y. Suzuki, R. Ikuta, K. Oorui, M. Koyama, T. Masuda, N. Fujii (2014) Leakage of magmatic-hydrothermal volatiles from a crater bottom formed by a submarine eruption in 1989 at Teishi Knoll, Japan. Journal of Volcanology and Geothermal Research, 270,  90-98.

(122) Toki, T., R. Higa, A. Tanahara, A. Ijiri, U. Tsunogai, J. Ashi (2013) Origin of pore water in Kumano mud volcanoes. Chikyukagaku (Geochemistry), Vol.47, No.4, 257-274 (in Japanese with English abstract).

(121) Katsuyama, C., Nashimoto, H., Nagaosa, K., Ishibashi, T., Kinoshita, T., Yoshikawa, H., Aoki, K., Asano, T., Sasaki, Y., Sohrin, R., Komatsu, D., Tsunogai, U., Kimura, H., Suwa, Y., Kato, K. (2013) Occurrence and potential activity of denitrifiers and methanogens in groundwater at 140 m depth in Pliocene diatomaceous mudstone of northern Japan. FEMS Microbiology Ecology, 86, 532–543.

(120) Kameyama, S., H. Tanimoto, S. Inomata, H. Y. Inoue, U. Tsunogai, A. Tsuda, M. Uematsu, M. Ishii, and D. Sasano (2013) Strong relationship between dimethyl sulfide and net community production in the western subarctic Pacific. Geophysical Research Letters, 40, 3986–3990.

(119) Yamazaki, A., T. Watanabe, N. Takahata, Y. Sano, and U. Tsunogai (2013) Nitrogen isotopes in intra-crystal coralline aragonites. Chemical Geology, 351, 276–280.

(118) Tsunogai, U., D.D. Komatsu, and F. Nakagawa (2013) Remote temperature sensing on volcanic fumaroles using HIReTS: Applications to Satsuma-Iwojima volcano, Japan. Bulltein of the Volcanological Society of Japan, 58, 3, 443-459 (in Japanese with English abstract).
[abstract (Nagoya Repository)] [PDF link (Nagoya Repository): 1.2 MB]

(117) Nakagawa, F., A. Suzuki, S. Daita, T. Ohyama, D.D. Komatsu and  U. Tsunogai (2013) Tracing atmospheric nitrate in groundwater using triple oxygen isotopes: Evaluation based on bottled drinking water. Biogeosciences, 10, 3547-3558.
[abstract] [PDF link: 1680 kB] [doi:10.5194/bg-10-3547-2013]

(116) Yamanaka, T., K. Maeto, H. Akashi, J. Ishibashi, Y. Miyoshi, K. Okamura, T. Noguchi, Y. Kuwahara, T. Toki, U. Tsunogai, T. Ura, T. Nakatani, T. Maki, K. Kubokawa, H. Chiba (2013) Shallow submarine hydrothermal activity with abundant magmatic water producing talc chimneys in the Wakamiko Crater of Kagoshima Bay, southern Kyushu, Japan. Journal of Volcanology and Geothermal Research, 258, 74–84.

(115) Issa, T. Ohba, F. Wilson, Y. Yoshida, F. Alain, M. Kusakabe, U. Tsunogai, Y. Oginuma, C. T. Boris, G. Tanyileke, S. Nkamdjou, H. Satake and J.V. Hell (2013) Contribution of methane to total gas pressure in deep waters at lakes Nyos and Monoun (Cameroon, West Africa). Geochemical Journal, 47, 3, 349-362.
[abstract] [doi:10.2343/geochemj.2.0250]

(114) Konno, U., M. Kouduka, D.D. Komatsu, K. Ishii, A. Fukuda, U. Tsunogai, K. Ito, and Y. Suzuki (2013) Novel microbial populations colonized in deep granitic groundwater from Grimsel Test Site, Switzerland. Microbial Ecology, 65, 3, 626-637.

(113) Kitagawa, T., T. Ishimura, R. Uozato, K. Shirai, Y. Amano, A. Shinoda, T. Otake, U. Tsunogai, and S. Kimura (2013) Otolith δ18O of Pacific bluefin tuna (Thunnus orientalis) as an indicator of ambient water temperature. Marine Ecology Progress Series, 481, 199–209.

(112) Toki, T., R. Honda, K. Oomine, D. Iwata, U. Tsunogai, D.D. Komatsu, Y. Sano, N. Takahata, J. Ishibashi, M. Kinoshita, H. Yamashiro (2012) The origin of methane in crustal fluids around the Ryukyu Islands. Chikyukagaku (Geochemistry), 46, 257-274 (in Japanese with English abstract).

(111) von Glasow, R., T. Jickells, A. Baklanov, G.R. Carmichael, T. Church, L. Gallardo, C. Hughes, M. Kanakidou, P. Liss, L. Mee, R. Raine, P. Ramachandran, R. Ramesh, K. Sundseth, U. Tsunogai, M. Uematsu, and T. Zhu (2012) Megacities and large urban agglomerations in the Coastal ZoneInteractions between atmosphere, land and marine ecosystems. AMBIO, 42, 13-28.

(110) Tsunogai, U., K. Maegawa, S. Sato, D.D. Komatsu, F. Nakagawa, T. Toki, and J. Ashi (2012) Coseimic massive methane release from a submarine mud volcano. Earth and Planetary Science Letters, 341-344, 79-85.

(109) Ishimura, T., U. Tsunogai, S. Hasegawa, F. Nakagawa, T. Oi, H. Kitazato, H. Suga, and T. Toyofuku (2012) Variation in stable carbon and oxygen isotopes of individual benthic foraminifera: tracers for quantifying the magnitude of isotopic disequilibrium. Biogeosciences, 9, 4353-4367.
[abstract] [PDF link: 3321 kB]

(108) Ijiri, A., N. Harada, A. Hirota, U. Tsunogai, N.O. Ogawa, T. Itaki, B.-K. Khim, M. Uchida (2012) Biogeochemical processes involving acetate in sub-seafloor sediments from the Bering Sea shelf break. Organic Geochemistry, 48, 47-55.
[abstract] [doi:10.1016/j.orggeochem.2012.04.004]

(107) Kato, S., K. Nakamura, T. Toki, J. Ishibashi, U. Tsunogai, A. Hirota, M. Ohkuma, and A. Yamagishi (2012) Iron-based microbial ecosystem on and below the seafloor: a case study of hydrothermal fields of the Southern Mariana Trough. Frontiers in Microbiology, 3, 89, doi: 10.3389/fmicb.2012.00089.
[abstract] [doi:10.3389/fmicb.2012.00089]

(106) Kawagucci, S., Y.T. Yoshida, T. Noguchi, M.C. Honda, H. Uchida, H. Ishibashi, F. Nakagawa, U. Tsunogai, K. Okamura, Y. Takaki, T. Nunoura, J. Miyazaki, W. Lin, H. Kitazato, and K. Takai (2012) Disturbance of deep-sea environments induced by the M9.0 Tohoku Earthquake. Scientific Reports, 2, 270, doi:10.1038/srep00270.
[abstract] [doi:10.1038/srep00270]

(105) Toki, T., Y. Uehara, K. Kinjo, A. Ijiri, U. Tsunogai, H. Tomaru, J. Ashi (2012) Methane production and accumulation in the Nankai accretionary prism: Results from IODP Expeditions 315 and 316. Geochemical Journal, 46, 89-106.

[abstract] [doi:10.2343/geochemj.1.0155]

(104) Gamo, T., U. Tsunogai, A. Hirota, N. Nakayama, D.-J. Kang, and K.-R. Kim (2012) First measurements of methane and its carbon isotope ratio in the Japan Sea (East Sea). Marine Chemistry, 128-129, 92-99.
[abstract] [doi:10.1016/j.marchem.2011.10.006]

(103) Yamazaki, A., T. Watanabe and U. Tsunogai (2011) Nitrogen isotopes of organic nitrogen in reef coral skeletons as a proxy of tropical nutrient dynamics. Geophys. Res. Lett., 38, L19605, doi:10.1029/2011GL049053.
[abstract] [doi:10.1029/2011GL049053]

(102) Komatsu, D.D., U. Tsunogai, K. Kamimura, U. Konno, T. Ishimura, and F. Nakagawa (2011) Stable hydrogen isotopic analysis of nanomolar molecular hydrogen by automatic multi-step gas chromatographic separation. Rapid Communications in Mass Spectrometry, 25, 3351-3359.
[abstract] [doi:10.1002/rcm.5231]

(101) Tsunogai, U., K. Kamimura, S. Anzai, F. Nakagawa, and D.D. Komatsu (2011) Hydrogen isotopes in volcanic plumes: Tracers for remote temperature sensing of fumaroles. Geochimica et Cosmochimica Acta, 75, 4531-4546.

(100) Kameyama, S., H. Tanimoto, S. Inomata, K. Suzuki, D.D. Komatsu, A. Hirota, U. Konno, and U. Tsunogai (2011) Application of PTR-MS to incubation experiments of the marine diatom Thalassiosira pseudonana. Geochemical Journal, 45, 355-363.
[abstract] [PDF link: 448 kB] [doi:10.2343/geochemj.1.0127]

(99) Nakada, R., Y. Takahashi, U. Tsunogai, G. Zheng, H. Shimizu, and K.H. Hattori (2011) A geochemical study on mud volcanoes in the Junggar Basin, China. Applied Geochemistry, 26, 1065-1076.
[abstract] [doi:10.1016/j.apgeochem.2011.03.011]

(98) Tsunogai, U., S. Daita, D.D. Komatsu, F. Nakagawa, and A. Tanaka (2011) Quantifying nitrate dynamics in an oligotrophic lake using Δ17O. Biogeosciences, 8, 687-702.
[abstract] [PDF link: 1068 kB]
[doi:10.5194/bg-8-687-2011] [HUSCAP link]

(97) Saito, T., O. Stein, U. Tsunogai, K. Kawamura, T. Nakatsuka, T. Gamo, and N. Yoshida (2011) Stable carbon isotope ratios of ethane over the North Pacific: atmospheric measurements and global chemical transport modeling. Journal of Geophysical Research, 116, D02308, doi:10.1029/2010JD014602.
[abstract] [doi:10.1029/2010JD014602]

(96) Toki, T., K. Maegawa, U. Tsunogai, S. Kawagucci, N. Takahata, Y. Sano, J. Ashi, M. Kinoshita, and T. Gamo (2011) Gas chemistry of pore fluids from Oomine Ridge on the Nankai accretionary prism. in: Accretionary Prisms and Convergent Margin Tectonics in the Northwest Pacific Basin (eds. Y Ogawa, R. Anma and Y. Dilek), Springer, 247-262.
[doi:10.1007/978-90-481-8885-7 (book)] [doi:10.1007/978-90-481-8885-7_12 (article)]

(95) Gay, A., Y. Takano, K.W.P. Gilhooly III, C. Berndt, Heeschen, N. Suzuki, S. Saegusa, F. Nakagawa, U. Tsunogai, S.Y. Jiang, M. Lopez (2010) Geophysical and geochemical evidence of large scale fluid flow within shallow sediments in the eastern Gulf of Mexico, offshore Louisiana. Geofluids, 11, 34-47.
[abstract] [doi:10.1111/j.1468-8123.2010.00304.x]

(94) Watsuji, T., S. Nakagawa, S. Nemoto, M. Kitada, S. Tsuchida, J. Kakuta, T. Toki, A. Hirota, U. Tsunogai and K. Takai (2010) Diversity and Function of Epibiotic Microbial Communities on the Galatheid Crab, Shinkaia crosnieri. Microbes and Environments 25, 288-294.
[abstract] [doi:10.1264/jsme2.ME10135]

(93) Kameyama, S. H. Tanimoto, S. Inomata, U. Tsunogai, A. Ooki, S. Takeda, H. Obata, M. Uematsu (2010) High-resolution measurement of multiple volatile organic compounds dissolved in seawater using equilibrator inlet-proton transfer reaction-mass spectrometry (EI-PTR-MS). Marine Chemistry, 122, 59-73.


(92) Nakayama, N., J. Ashi, U. Tsunogai, T. Gamo, and M. Tanahashi (2010) Sources of pore water in a Tanegashima mud volcano inferred from chemical and stable isotopic studies. Geochemical Journal, 44, 561-569.
[abstract] [pdf link: 296kB] [doi:10.2343/geochemj.1.0094]

(91) Kawagucci, S., K. Shirai, T.F. Lan, N. Takahata, U. Tsunogai, Y. Sano, and T. Gamo (2010) Gas geochemical characteristics of hydrothermal plumes at the HAKUREI and JADE vent sites, the Izena Cauldron, the Okinawa Trough. Geochemical Journal, 44, 507-518.
[abstract] [pdf link: 580kB] [doi:10.2343/geochemj.1.0100]

(90) Gamo, T., U. Tsunogai, S. Ichibayashi, H. Chiba, H. Obata, T. Oomori, T. Noguchi, E. T. Baker, T. Doi, M. Maruo and Y. Sano (2010) Microbial carbon isotope fractionation to produce extraordinarily heavy methane in aging hydrothermal plumes over the southwestern Okinawa Trough. Geochemical Journal, 44, 477-487.
[abstract] [pdf link: 2.6MB] [doi:10.2343/geochemj.1.0097]

(89) Tsunogai, U., A. Kosaka, N. Nakayama, D.D. Komatsu, U. Konno, S. Kameyama, F. Nakagawa, H. Sumino, K. Nagao, K. Fujikura, and H. Machiyama (2010) Origin and fate of deep-sea seeping methane bubbles at Kuroshima knoll, Ryukyu forearc region, Japan. Geochemical Journal, 44, 461-476.
[abstract] [pdf link: 1.4MB] [doi:/10.2343/geochemj.1.0096] [HUSCAP abstract] [HUSCAP PDF link]

(88) Noguchi, I., Hayashi, K., Kato, T., Yamaguchi, T., Akiyama, M., Otsuka, H., Sakai, S., Takagi, K., Fukazawa, T., Shibata, H., Fujinuma, Y., Saigusa, N., Shimotori, M., Endo, M., Yago, H., Matsuda, K., Tsunogai, U. and Hara, H. (2010) Atmospheric Behavior of Nitrous Acid and Nitrogen Dioxide in Northern Japan. Journal of Japan Society for Atmospheric Environment, 45, 153-165 (in Japanese with English abstract).
[J-STAGE PDF link: 1.5MB]

(87) Fukuda, A., H. Hagiwara, T. Ishimura, M. Kouduka, Y. Amano, U. Tsunogai, Y. Suzuki, T. Mizuno (2010) Geomicrobiological Properties of Ultra-Deep Granitic Groundwater from the Mizunami Underground Research Laboratory (MIU), Central Japan. Microbial Ecology, 60, 214-225.
[abstract] [doi:10.1007/s00248-010-9683-9]

(86) Hirota, A., U. Tsunogai, D. D. Komatsu, and F. Nakagawa (2010) Simultaneous determination of δ15N and δ18O of N2O and δ13C of CH4 in nanomolar quantities from a single water sample. Rapid Communications in Mass Spectrometry, 24, 1085-1092.
[abstract] [doi:10.1002/rcm.4483]

(85) Konno, U., U. Tsunogai, D.D. Komatsu, S. Daita, F. Nakagawa, A.Tsuda, T. Matsui, Y.-J. Eum and K. Suzuki, (2010) Determination of total N2 fixation rates in the ocean taking into account both the particulate and filtrate fractions. Biogeosciences, 7, 2369-2377.

[abstract] [PDF link: 1388 kB] [doi:10.5194/bg-7-2369-2010] [HUSCAP abstract]

(84) Tsunogai, U., D.D. Komatsu, S. Daita, G.A. Kazemi, F. Nakagawa, I. Noguchi, and J. Zhang (2010) Tracing the fate of atmospheric nitrate deposited onto a forest ecosystem in eastern Asia using Δ17O. Atmospheric Chemistry and Physics, 10, 1809-1820.
[abstract] [PDF link: 1598 kB]
[doi:10.5194/acp-10-1809-2010] [HUSCAP abstract]

(83) Nunoura, T., H. Oida, M. Nakaseama, A. Kosaka, S.B. Ohkubo, T. Kikuchi, H. Kazama, S.H. Tanabe, K. Nakamura, M. Kinoshita, H. Hirayama, F. Inagaki, U. Tsunogai, J. Ishibashi, and K. Takai (2010) Archaeal diversity and distribution along thermal and geochemical gradients in hydrothermal sediments at the Yonaguni Knoll IV, the Southern Okinawa Trough. Applied and Environmental Microbiology, 76, 4, 1198-1211.

(82) Kato, K., K. Nagaosa, H. Kimura, C. Katsuyama, K. Hama, T. Kunimaru, U. Tsunogai and K. Aoki (2009) Unique distribution of deep groundwater bacteria constrained by geological setting. Environmental Microbiology Reports, 1, 569-574.
[abstract] [doi:10.1111/j.1758-2229.2009.00087.x]

(81) Kameyama, S., H. Tanimoto, S. Inomata, U. Tsunogai, A. Ooki, Y. Yokouchi, S. Takeda, H. Obata, and M. Uematsu (2009) Equilibrator inlet-proton transfer reaction-mass spectrometry (EI-PTR-MS) for fast and sensitive measurements of dimethyl sulfide in seawater. Analytical Chemistry, 81, 9021-9026.

(80) Miyazaki, J., R. Higa, T. Toki, J. Ashi, U. Tsunogai, T. Nunoura, H. Imachi, and K. Takai (2009) Molecular characterization of potential nitrogen fixation by anaerobic methane oxidizing archaea in the methane-seep sediments at the No. 8 Kumano Knoll in the Kumano Basin, off shore of Japan. Applied and Environmental Microbiology, 75, 7153-7162.

(79) Hirota, A., A. Ijiri, D.D. Komatsu, S.B. Ohkubo, F. Nakagawa, and U. Tsunogai (2009) Enrichment of nitrous oxide in a water column in the Bering and Chukchi Sea area. Marine Chemistry, 116, 47-53.

(78) Ijiri, A., U. Tsunogai, T. Gamo, F. Nakagawa, T. Sakamoto, and S. Saito (2009) Enrichment of adsorbed methane in authigenic carbonate concretions. Geo-Marine Letters 29, 301-308.

(77) Kameyama, S., U. Tsunogai, F. Nakagawa, M. Sasakawa, D.D. Komatsu, A. Ijiri, J. Yamaguchi, T. Horiguchi, H. Kawamura, A. Yamaguchi, and A. Tsuda (2009) Enrichment of alkanes within a phytoplankton bloom during an in situ iron enrichment experiment in the western subarctic Pacific. Marine Chemistry 115, 92-101.

(76) Tohjima, Y., K. Katsumata, I. Morino, H. Mukai, T. Machida, I. Akama, T. Amari, and U. Tsunogai (2009) Theoretical and experimental evaluation of the isotope effect of NDIR analyzer on atmospheric CO2 measurement. Journal of Geophysical Research 114, D13302, doi:10.1029/2009JD011734.
[abstract] [doi:

(75) Saito, T., K. Kawamura, U. Tsunogai, T.-Y. Chen, H. Matsueda, T. Nakatsuka, T. Gamo, M. Uematsu, and B.J. Huebert (2009) Photochemical histories of non-methane hydrocarbons inferred from their stable carbon isotope ratio measurements over East Asia. Journal of Geophysical Research 114, D11303, doi:10.1029/2008JD011388.
[abstract] [doi:10.1029/2008JD011388]

(74) Kimoto, K., T. Ishimura, U. Tsunogai, T. Itaki, Y. Ujiie (2009) Living triserial planktic foraminifera Gallitellia vivans (Cushman): distribution, stable isotopes, and paleoecological implications. Marine Micropaleontology 71, 71-79.

(73) Suzuki, R., T. Suko, H. Yoshioka, M. Takahashi, K. Nanba, U. Tsunogai, N. Takeno, K. Ito (2009) Biogeochemical profiles in deep sedimentary rocks in an inland fore-arc basin, Central Japan. Chemical Geology 259, 107-119.

(72) Kumagai, H., K. Nakamura, T. Toki, T. Morishita, K. Okino, J. Ishibashi, U. Tsunogai, S. Kawagucci, T. Gamo, T. Shibuya, T. Sawaguchi, N. Neo, M. Joshima, T. Sato, and K. Takai (2008) Geological background of the Kairei and Edmond hydrothermal fields along the Central Indian Ridge: Implications of their vent fluids' distinct chemistry. Geofluids 8, 239-251.

(71) Suzuki, R., Ishibashi J., Nakaseama M., Konno, U., Tsunogai, U., Gena, K., Chiba, H. (2008) Diverse range of mineralization induced by phase separation of hydrothermal fluid: Case study of the Yonaguni Knoll IV hydrothermal field in the Okinawa Trough back-arc basin. Resource Geology 58, 267-288.

(70) Kawagucci, S., K. Okamura, K. Kiyota, U. Tsunogai, Y. Sano, K. Tamaki, and T. Gamo (2008) Methane, manganese, and helium-3 in newly discovered hydrothermal plumes over the Central Indian Ridge, 18-20°S. Geochemistry, Geophysics, Geosystems., 9, Q10002, doi:10.1029/2008GC002082.

(69) Toki, T., U. Tsunogai, J. Ishibashi, M. Utsumi, and T. Gamo (2008) Methane enrichment in low-temperature hydrothermal fluid from the Suiyo Seamount in the Izu-Bonin Arc of the western Pacific Ocean. Journal of Geophysical Research 13, B08S13, doi:10.1029/2007JB005476.
[abstract] [doi:

(68) Naraoka, H., T. Naito, T. Yamanaka, U. Tsunogai, and K. Fujikura (2008) A multi-isotope study of deep-sea mussels at three different hydrothermal vent sites in the northwestern Pacific. Chemical Geology 255, 25-32.


(67) Takai, K., K. Nakamura, T. Toki, U. Tsunogai, M. Miyazaki, H. Hirayama, S. Nakagawa, T. Nunoura and K. Horikoshi (2008) Highest temperature limit for growth and isotopically heavy CH4 by a hyperthermophilic methanogen under high pressures cultivation. Proc. Nat. Acad. Sci. U.S.A. 105, 10949-10954.
[abstract] [doi:10.1073/pnas.0712334105]

(66) Kawagucci, S., U. Tsunogai, S. Kudo, F. Nakagawa, H. Honda, S. Aoki, T. Nakazawa, M. Tsutsumi, and T. Gamo (2008) Long-term observation of mass-independent oxygen isotope anomaly in stratospheric CO2. Atmospheric Chemistry and Physics 8, 6189-6197.
[abstract] [PDF link: 664 kB]

(65) Ishimura, T., U. Tsunogai, and F. Nakagawa (2008) Grain-scale heterogeneities in the stable carbon and oxygen isotopic compositions of the international standard calcite materials (NBS19, NBS18, IAEA-CO-1, and IAEA-CO-8). Rapid Communications in Mass Spectrometry, 22, 1925-1932.

(64) Uchida, M., K. Ohkushi, K. Kimoto, F. Inagaki, T. Ishimura, U. Tsunogai, T. TuZino, Y. Shibata (2008) Radiocarbon-based carbon source quantification of anomalous isotopic foraminifera in glacial sediments in the western North Pacific. Geochemistry, Geophysics and Geosystems, 9, Q04N14, doi:10.1029/2006GC001558.

(63) Komatsu, D.D., T. Ishimura, F. Nakagawa, and U. Tsunogai (2008) Determination of the 15N/14N, 17O/16O, and 18O/16O ratios of nitrous oxide by using continuous-flow isotope ratio mass spectrometry. Rapid Communications in Mass Spectrometry, 22, 1587-1596.
[abstract] [doi:10.1002/rcm.3493]

(62) Tsunogai, U., T. Kido, A. Hirota, S.B. Ohkubo, D.D. Komatsu, F. Nakagawa (2008) Sensitive determinations of stable nitrogen isotopic composition of organic nitrogen through chemical conversion to N2O. Rapid Communications in Mass Spectrometry, 22, 345-354.
[abstract] [doi:10.1002/rcm.3368]

(61) Sasakawa, M., U. Tsunogai, S. Kameyama, F. Nakagawa, Y. Nojiri, A. Tsuda (2008) Carbon isotopic characterization for the origin of excess methane in subsurface seawater. Journal of Geophysical Research, 113, C03012, doi: 10.1029/2007JC004217.

(60) Inomata, S., H. Tanimoto, S. Kameyama, U. Tsunogai, H. Irie, Y. Kanaya, and Z. Wang (2008) Technical Note: Determination of formaldehyde mixing ratios in polluted air with PTR-MS: Laboratory experiments and field measurements. Atmospheric Chemistry and Physics 8, 273-284.
[abstract] [PDF link: 1081 kB]

(59) Toki, T., U. Tsunogai, T. Gamo, and M. Tanahashi (2007) Geochemical study of pore fluid in surface sediment at the Daini-Atsumi Knoll. Journal of Geochemical Exploration 95, 29-39.

(58) Hirono, T., U. Tsunogai, K. Maegawa, T. Toki, M. Tanimizu, W. Soh, W. Lin, E.-C. Yeh, S.-R. Song, and C.-Y. Wang (2007) Chemical and isotopic characteristics of interstitial fluids within the Taiwan Chelungpu fault. Geochem. J., 41, 97-102.
[abstract] [PDF link: 1.2 MB]

(57) Kim, Y.-S., N. Tanaka, F. Nakagawa, U. Tsunogai, M. Ueyama, Y. Harazono (2007) Assessment of winter fluxes of CO2 and CH4 in boreal forest soils of central Alaska estimated by the profile method and the chamber method: a diagnosis of methane emission and implications for the regional carbon budget. Tellus, 59B, 223-233.

(56) Hongo, Y., H. Obata, T. Gamo, M. Nakaseama , J. Ishibashi, U. Konno, S. Saegusa, S. Ohkubo and U. Tsunogai (2007) Rare Earth Elements in the hydrothermal system at Okinawa Trough back-arc basin. Geochem. J. 41, 1-15.
[abstract] [PDF link: 1.2 MB]

(55) Kim, J.-H., M.-H. Park, U. Tsunogai, T.-J. Cheong, B.-J. Ryu, Y.-J. Lee, H.-C. Han, J.-H. Oh and H.-W. Chang (2007) Geochemical characterization of the organic matter, pore water constituents and shallow methane gas in the eastern part of the Ulleung Basin, East Sea (Japan Sea). Island Arc, 16, 93-104.

(54) Oba M., Sakata S. and Tsunogai U. (2006) Polar and neutral isopranyl glycerol ether lipids as biomarkers of archaea in near-surface sediments from the Nankai Trough. Organic Geochemistry 37, 1643-1654.

(53) Inagaki, F., M.M.M. Kuypers, U. Tsunogai, J. Ishibashi, K. Nakamura, T. Treude, S. Ohkubo, M. Nakaseama, K. Gena, H. Chiba, H. Hirayama, T. Nunoura, K. Takai, B.B. J?rgensen, K. Horikoshi and A. Boetius (2006) Microbial community in a sediment-hosted CO2 lake of the southern Okinawa Trough hydrothermal system. Proc. Nat. Acad. Sci. U.S.A., 103, 14164-14169.

(52) Konno, U., U. Tsunogai, F. Nakagawa, M. Nakaseama, J. Ishibashi, T. Nunoura, K. Nakamura (2006) Liquid CO2 venting on seafloor: Yonaguni IV Knoll hydrothermal system, Okinawa Trough. Geophys. Res. Lett. 33, L16607, doi:10.1029/2006GL026115.
[abstract] [doi:

(51) Toki, T., T. Gamo, and U. Tsunogai (2006) Origins of hydrocarbons at Sagara oil field, Central Japan. Island Arc 15, 285-291.
[doi:10.1111/j.1440-1738.2006.00528.x ]

(50) Gamo, T., J. Ishibashi, U. Tsunogai, K. Okamura, and H. Chiba (2006) Unique geochemistry of submarine hydrothermal fluids from arc-backarc settings of the western Pacific. In: Back-Arc Spreading Systems: Geological, Biological, Chemical and Physical Interactions (ed by D. Christie), Geophysical Monograph Serise 166, Americal Geophysical Union, p.147-161.
[contents] [abstract][doi:10.1029/166GM08]

(49) Arakawa, S., T. Sato, R. Sato, J. Zhang, T. Gamo, U. Tsunogai, A. Hirota, Y. Yoshida, R. Usami, F. Inagaki and C. Kato (2006) Molecular phylogenetic and chemical analyses of the microbial mats in deep-sea cold seep sediments at the northeastern Japan Sea. Extremophiles 10, 311-319.

(48) Saegusa, S., U. Tsunogai, F. Nakagawa, and S. Kaneko (2006) Development of a multi-bottle gas-tight fluid sampler WHATS II for Japanese submersibles/ROVs. Geofluids 6, 234-240.

(47) Nakagawa, T., K. Takai, Y. Suzuki, H. Hirayama, U. Konno, U. Tsunogai and K. Horikoshi (2006) Geomicrobiological exploration and characterization of a novel deep-sea hydrothermal system at the TOTO caldera in the Mariana Volcanic Arc. Environ. Microbiol. 8, 37-49.

(46) Ishimura, T., A. Ijiri, K. Abe, and U. Tsunogai (2005) Characteristics of calcareous concretions with Calyptogena sp. in the Miocene Morai Formation, Hokkaido, Journal of Geological Society of Japan 111, 3, VII-VIII (in Japanese).

(45) Shakirov, R.B., A.I. Obzhirov, A.N. Salyuk, N. Biebow,V.E. Terekhova, U. Tsunogai and H. Shoji (2005) Classification of anomalous methane fields in the Sea of Okhotsk. Polar Meteorology and Glaciology 19, 50-66.

(44) Tsunogai, U., F. Nakagawa, T. Gamo and J. Ishibashi (2005) Stable isotopic compositions of methane and carbon monoxide in the Suiyo hydrothermal plume, Izu-Bonin arc: Tracers for microbial consumption/production. Earth Planet Sci. Lett. 237, 326-340.

(43) Kawagucci, S., U. Tsunogai, S. Kudo, F. Nakagawa, H. Honda, S. Aoki, T. Nakazawa and T. Gamo (2005) An analytical system for determining δ17O in CO2 using continuous flow-isotope ratio MS. Analytical Chemistry 77, 4509 -4514.

(42) Kameyama, S., U. Tsunogai, T. Gamo, J. Zhang, M. Suzuki, and Y. Koyama (2005) Geochemical studies on submarine groundwater discharges in Toyama Bay using methane as a tracer. Chikyukagaku (Geochemistry) 39, 131-140 (in Japanese with English abstract).
[abstract] [PDF link: 401 kB] [HUSCAP abstract] [HUSCAP PDF link]

(41) Ishibashi, J., K. Nakamura, K. Okamura, K. Shitashima, T. Toki, U. Tsunogai (2005) Development of sampling devices and monitoring systems to study the geochemical environment within active hydrothermal fields. Oceanogr. Japan, 14, 251-266 (in Japanese with English abstract).

(40) Tsunogai, U., F. Nakagawa, and K. Okamura (2005) Geochemical studies on the microbial activities within the Suiyo seamount hydrothermal plume, Izu-Bonin arc. Oceanogr. Japan, 14, 279-295 (in Japanese with English abstract).

(39) Komatsu, D.D., U. Tsunogai, J. Yamaguchi, F. Nakagawa (2005) A selective unsaturated hydrocarbon subtraction technique for stable carbon isotopic analysis of atmospheric methyl chloride, methyl bromide, and C2 - C5 saturated hydrocarbons using continuous-flow isotope ratio mass spectrometry. Rapid Commun. Mass Spectrom. 19, 477-483

(38) Nakagawa, F., U. Tsunogai, D.D. Komatsu, K. Yamada, N. Yoshida, J. Moriizumi, K. Nagamine, T. Iida, Y. Ikebe (2005) Automobile exhaust as a 13C- and D-enriched source of atmospheric methane in urban areas. Organic Geochem. 36, 727-738.

(37) Ishimura, T., U. Tsunogai, and T. Gamo (2004) Stable carbon and oxygen isotopic determination of sub-microgram quantities of CaCO3 to analyze each individual foraminiferal shell. Rapid Commun. Mass Spectrom. 18, 2883-2888.
[abstract] [doi:10.1002/rcm.1701]

(36) Inagaki, F., U. Tsunogai, M. Suzuki, A. Kosaka, H. Machiyama, K. Takai, T. Nunoura, K.H. Nealson, and K. Horikoshi (2004) Characterization of C1-metabolizing prokaryotic communities by pmoA, mmoX, mxaF, mcrA and 16S rRNA Genes in methane seep habitats at the Kuroshima Knoll, the Southern Ryukyu Arc. Appl. Enviorn. Microbiol. 70, 7445-7455.
[abstract] [doi:10.1128/AEM.70.12.7445-7455.2004]

(35) Toki, T., U. Tsunogai, T. Gamo, S. Kuramoto, and J. Ashi (2004) Detection of low-chloride fluids beneath a cold seep field on the Nankai accretionary wedge off Kumano, south of Japan. Earth and Planetary Science Letters 228, 37-47.

(34) Gamo, T., H. Masuda, T. Yamanaka, K. Okamura, J. Ishibashi, E. Nakayama, H. Obata, K. Shitashima, Y. Nishio, H. Hasumoto, M. Watanabe, K. Mitsuzawa, N. Seama, U. Tunogai, F. Kouzuma and Y. Sano (2004) Discovery of a new hydrothermal venting site in the southernmost Mariana Arc: Al-rich hydrothermal plumes and white smoker activity associated with biogenic methane. Geochemical Journal 38, 527-534.
[abstract] [PDF link: 137 kB]

(33) Takai, K., T. Gamo, U. Tsunogai, N. Nakayama, H. Hirayama, K. Nealson, and K. Horikoshi (2004) Evidence for a hydrogen-based hyperthermophilic subsurface lithoautotrophic microbial ecosystem (HyperSLiME) beneath an active deep-sea hydrothermal field. Extremophiles 8, 269-282, doi: 10.1007/s00792-004-0386-3.

(32) Nakagawa, F., U. Tsunogai, N. Yoshida, and T. Gamo (2004) Stable isotopic compositions and fractionations of carbon monoxide at coastal and open ocean stations in the Pacific. J. Geophys. Res. 109, C06016, doi: 10.1029/2001JC001108.
[abstract] [doi:10.1029/2001JC001108]

(31) Jeong, K.S., J.H. Cho, S.R. Kim, S. Hyun and U. Tsunogai (2004) Geophysical and geochemical observations on actively seeping hydrocarbon gases on the south-eastern Yellow Sea continental shelf. Geo-Marine Letters 24, 53-62.

(30) Shinohara, M., E. Araki, M. Kamata, M. Kinoshita, M. Kyo, K. Kuroki, Y. Kosuge, S. Kobayashi, S. Konno, T. Goto, S. Saito, M. Suzuki, T. Takahashi, K. Tadokoro, U. Tsunogai, K. Tezuka, K. Namba, S. Nishi, R. Hino, H. Mikada, N. Morita, C. Yoshida and H. Ito (2003) Long-term monitoring using deep seafloor boreholes in seismogenic zone. Bull. Earthquake Res. Inst. 78, 205-218.
[PDF link: 6.1 MB]

(29) Tsunogai, U., Y. Hachisu, D.D. Komatsu, F. Nakagawa, T. Gamo and K. Akiyama (2003) An updated estimation of the stable carbon and oxygen isotopic compositions of automobile CO emissions. Atmospheric Environment 37, 4901-4910.

(28) Toki, T., U. Tsunogai, T. Gamo, and M. Minakawa (2003) Geochemical exploration of volcanic activity on the sea floor using CH4 as a tracer: Miyakejima volcano, Japan. Bull. Volcano. Soc. Japan 48, 63-67 (in Japanese with English abstract).

(27) Ijiri, A., U. Tsunogai and T. Gamo (2003) Simple method for oxygen-18 determination of milligram quantities of water using NaHCO3 reagent. Rapid Commun. Mass Spectrom. 17, 1472-1478.
[abstract] [doi:10.1002/rcm.1081]

(26) Yamanaka, T., C. Mizota, H. Satake, F. Kouzuma, T. Gamo, U. Tsunogai, T. Miwa, K. Fujioka (2003) Stable Isotope Evidence for a Putative Endosymbiont-Based Lithotrophic Bathymodiolus sp. Mussel Community Atop a Serpentine Seamount, Geomicrobiology Journal 20, 3, 185-197.

(25) Tsunogai, U., T. Toki, N. Nakayama, T. Gamo, H. Kato and S. Kaneko (2003) WHATS: a new multi-bottle gas-tight sampler for sea-floor vent fluids. Chikyukagaku (Geochemistry) 37, 3, 101-109 (in Japanese with English abstract).
[abstract (ciNii)] [PDF link (ciNii)] [abstract (HUSCAP)] [PDF link (HUSCAP)]

(24) Nakagawa, F., U. Tsunogai, N. Yoshida, and D.D. Adams (2003) Stable isotopic compositions of bacterial light hydrocarbons in marginal marine sediments, In: Land and marine hydrogeology (eds. M. Taniguchi, K. Wang, T. Gamo), Elsevier Science, 141-150.

(23) Ijiri, A., T. Sakamoto, U.Tsunogai, T. Gamo, S. Saito, and K. Suehiro (2003) Authigenic carbonates at sites 1150 and 1151, In: Proc. ODP Scientific Results, Vol. 186 (eds. Suehiro K., I.S. Sackes, I.S. Acton, and M. Oda), Ms. 186SR-109.
[PDF link (113 kB)]

(22) Tsunogai, U., F. Nakagawa, D.D. Komatsu, and T. Gamo (2002) Stable carbon and oxygen isotopic analysis of atmospheric carbon monoxide using CF-IRMS by isotope-ratio monitoring of CO. Anal. Chem. 74, 5695-5700.
[abstract] [doi:10.1021/ac020290x]

(21) Saito, T., U. Tsunogai, K. Kawamura, T. Nakatsuka, and N. Yoshida (2002) Stable carbon isotopic compositions of light hydrocarbons over the western North Pacific and implication for their photochemical ages. J. Geophys. Res. 107, D4, doi: 10.1029/2000JD000127.
[abstract] [doi:10.1029/2000JD000127]

(20) Toyoda, S., N. Yoshida, T. Miwa, Y. Matsui, H. Yamagishi, U. Tsunogai, Y. Nojiri, N. Tsurushima (2002) Production mechanism and global budget of N2O inferred from its isotopomers in the western North Pacific. Geophys. Res. Lett. 29, 3, doi: 10.1029/2001GL014311.


(19) Tsunogai, U., N. Yoshida and T. Gamo (2002) Carbon isotopic evidence for methane using sulfate reduction in sediment beneath seafloor cold seep vents at Nankai Trough. Marine Geology 187, 145-160.
[abstract] [doi:10.1016/S0025-3227(02)00263-3]

(18) Henry, P., S. Lallemant, K. Nakamura, U. Tsunogai, S. Mazzotti, and K. Kobayashi (2002) Surface expression of fluid venting at the toe of the Nanakai wedge and implication for flow paths. Marine Geology 187, 119-143.

(17) Tsunogai, U.(2002) Stable carbon isotopic studies of volatile components in seafloor venting hydrothermal and cold seep fluids, using CF-IRMS. Chikyukagaku (Geochemistry) 36, 51-63 (in Japanese with English abstract).
[contents] [abstract (ciNii)] [PDF link (ciNii)] [abstract (HUSCAP)] [PDF link (HUSCAP)]

(16) Gamo, T., H. Chiba, T. Yamanaka, T. Okudaira, J. Hashimoto, S. Tsuchida, J. Ishibashi, S. Kataoka, U. Tsunogai, F. Kouzuma, K. Okamura, Y. Sano, R. Shinjo (2001) Chemical characteristics of newly discovered black-smoker fluid venting and its effluent dispersion at the Rodriguez Triple Junction, Indian Ridge. Earth and Planetary Science Letters 193, 371-379.

(15) Toki, T., T. Gamo. T. Yamanaka, J. Ishibashi, U. Tsunogai, and O. Matsubayashi (2001) Methane migration from the Nankai Trough accretionary prism. Bulletin of the Geological Survey of Japan, 52, 1-8 (in Japanese with English abstract).
[PDF link (900 kB)]

(14) Tsunogai, U., F. Nakagawa, Y. Hachisu and N. Yoshida (2000) Stable carbon and oxygen isotopic analysis of carbon monoxide in natural waters, Rapid Commun. Mass Spectrom. 14, 1507-1512.

(13) Tsunogai, U., N. Yoshida, J. Ishibashi and T. Gamo (2000) Carbon isotopic distribution of methane in deep-sea hydrothermal plume, Myojin Knoll Caldera, Izu-Bonin arc: Implications for microbial methane oxidation in ocean and applications to heat flux estimation, Geochim. Cosmochim. Acta 64, 2439-2452.

(12) Nishimura, R., U. Tsunogai, J. Ishibashi, H. Wakita and Y. Nojiri (1999) Origin of 13C-enriched methane in the crater lake Towada, Japan. Geochemical Journal 33, p.277-283.
[abstract] [PDF link (1.9 MB)] [doi:10.2343/geochemj.33.277]

(11) Tsunogai, U., N. Yoshida and T. Gamo (1999) Carbon isotopic compositions of C2-C5 hydrocarbons and methyl chloride in urban, coastal and maritime atmosphere over western-North Pacific, J. Geophys. Res. 104, p.16,033-16,039.
[abstract] [doi:10.1029/1999JD900217]

(10) Sato, M., U. Tsunogai, J. Ishibashi, K. Notsu and H. Wakita (1999) Carbon isotope measurement of extremely low amounts of CH4: Application to volcanic gases from Satsuma-Iwojima, Japan. Analytical Sciences 15, 513-516.
[abstract] [PDF link: 44 kB]

(09) Tsunogai, U., J. Ishibashi, H. Wakita and T. Gamo (1998) Methane-rich plumes in Suruga Trough (Japan) and their carbon isotopic characterization, Earth and Planetary Science Letters 160, p. 97-105.
[abstract] [doi:10.1016/S0012-821X(98)00075-2]

(08) Y. Minai, U. Tsunogai, H. Takahashi, J. Ishibashi, R. Matsumoto and T. Tominaga (1997) Neutron activation analysis of deep sea sediments from the regions near Japan. Journal of Radioanalytical and Nuclear Chemistry 216, p.265-277.

(07) Tsunogai, U. and H. Wakita (1996) Anomalous ground water changes: Possible precursors of the Hyogo-ken Nanbu Earthquake, Japan. J. Phys. Earth 44, p.381-390.
[abstract] [PDF link: 1.1 MB]

(06) Tsunogai, U., J. Ishibashi, H. Wakita, T. Gamo, T. Masuzawa, T. Nakatsuka, Y. Nojiri and T. Nakamura (1996) Fresh water seepage and pore water recycling on the seafloor: Sagami Trough Subduction Zone, Japan. Earth and Planetary Science Letters 138, p.157-168.

(05) Johansen, A., D. Sornette, H. Wakita, U. Tsunogai and W.I. Newman (1996) Discrete Scaling in Earthquake Precursors: Evidence from the Kobe Earthquake, Japan. Journal de Physique I France 6, 1391-1402.
[abstract] [PDF link: 739 kB]

(04) Tsunogai, U. and H. Wakita (1995) Precursory chemical change in ground water: Kobe Earthquake, Japan. Science 269, p.61-63.
[abstract] [doi:10.1126/science.269.5220.61]

(03) Nakashima, K., H. Sakai, H. Yoshida, H. Chiba, Y. Tanaka, T. Gamo, J. Ishibashi and U. Tsunogai (1995) Hydrothermal mineralization in the Mid-Okinawa Trough. In Biogeochemcal Processes and Ocean Flux in the Western Pacific (eds. H. Sakai and Y. Nozaki), pp. 487-508, TERRAPUB, Tokyo.
[PDF link: 2.8 MB]

(02) 渡辺一樹、芝田 厚、梶村 徹、石橋純一郎、角皆 潤、青木正博、中村光一 (1994) 海底火山とそれに伴う海底熱水鉱床の調査手法、 海洋調査技術, 6 , 29-44.

(01) Tsunogai, U., J. Ishibashi, H. Wakita, T. Gamo, K. Watanabe, T. Kajimura, S. Kanayama and H. Sakai (1994) Peculiar features of Suiyo Seamount hydrothermal fluids, Izu-Bonin Arc: Differences from subaerial volcanism. Earth and Planetary Science Letters 126, 289-301.
[abstract] [doi: 10.1016/0012-821X%2894%2990113-9]

# Please use the contact information below to request Reprints or E-Prints (pdf) of the listed papers.
If you would like to request Reprints, please write your contact information as well.

Urumu Tsunogai
Graduate School of Environmental Studies, Nagoya University
Room 311, Common Bldg. Environmental Studies, Furo-cho, Chikusa-ku, Nagoya 464-8601, JAPAN
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Reports, Proceedings, etc.

(44) 角皆 潤, 中川 書子 (2014) 同位体環境科学第3講:安定同位体比によるプロセス解析. 大気環境学会誌, 第49巻, 第5号, A63-A7.
[doi:10.11298/taiki.49.A63] [PDF link (J-stage): 1.5 MB]

(43) Saito, H., Suzuki, N., and Tsunogai, U. (2013) Data report: carbon isotope compositions of methane in void gas samples from IODP Expedition 315 Site C0001, Nankai Trough, offshore Japan. In Kinoshita, M., Tobin, H., Ashi, J., Kimura, G., Lallemant, S., Screaton, E.J., Curewitz, D., Masago, H., Moe, K.T., and the Expedition 314/315/316 Scientists, Proc. IODP, 314/315/316: Tokyo (Integrated Ocean Drilling Program Management International, Inc.).
[doi: 10.2204/iodp.proc.314315316.209.2013]

(42) 角皆 潤・小松 大祐・代田 里子・中川 書子・野口 泉・張 勁 (2010)「三酸素同位体組成を指標に用いた大気沈着窒素ー森林生態系間相互作用の定量的評価法」低温科学、第68巻, 107-120.
[abstract] [PDF: 1.3 MB]

(41) 石村豊穂・角皆 潤 (2009)「高感度安定同位体組成定量法を用いた生物源炭酸塩の微小領域における安定同位体比分散の解明とその応用」月刊地球 31(11), p.604-609.

(40) 渡邊 剛、岨 康輝、白井厚太朗、石村豊穂、坂井三郎、横山一己、角皆 潤、佐野有司 (2008)「シャコガイ殻の同位体比、微量元素分析ーシャコガイ殻は日単位の環境変動を記録しているのかー」月刊地球、Vol.30,No.7 316-320

(39) Ishimura, T., Matthew, D.H., Takashima, R., Hirose M., Gautam, P., Nishi, H., Tsunogai, U. (2008) Experimental Study of the Use of the Stable Isotopic Composition of Calcareous Microfossils in Shallow Marine Sediments for Reconstructing Paleoenvironment, and a Comparison with the MART Index. Proceedings of the International Symposium, The Origin and Evolution of Natural Diversity (1-5 October 2007, Sapporo, Japan), 109-114.
[PDF link: 188 kB]

(38) 角皆 潤・中川書子・笹川基樹・亀山宗彦 (2006) 安定同位体組成を指標に用いた大気-海洋間の物質循環解析、山中 勤 (編) : 環境循環系診断のための同位体トレーサー技術電子モノグラフ No. 2, 筑波大学陸域環境研究センター, 47-53
[PDF link: 188 kB]

(37) 土岐知弘・角皆 潤・蒲生俊敬(2005)「時系列採水装置による南海トラフ付加体の地球化学的観測」月刊地球/号外 51, p. 204-212.

(36) 芦 寿一郎・青池 寛・中村 恭之・斎藤 実篤・倉本 真一・木下 正高・森田 澄人・角皆 潤・小島 茂明・アンリ ピエール(2004)遠州灘沖第2渥美海丘の地質構造と冷湧水, JAMSTEC深海研究, 24, 1-11 (海洋科学技術センター).

(35) 石橋純一郎・島 伸和・石井浩介・岡村 慶・海宝由佳・加賀谷昌弘・亀尾 桂・辻野 匠・角皆 潤・徳山英一・中川書子・中村光一・中村泰之・西村清和・野田雅一・東 陽介・丸茂克美・村上文敏・山本富士夫・山中寿朗・渡辺正晴 (2003) 水曜海山海底熱水活動の分布・様式と地殻構造の関連性の解明−KR01-15かいれい調査航海序報−,JAMSTEC深海研究, 22,115-123 (海洋科学技術センター).

(34) Tsunogai, U., F. Nakagawa , D. D. Komatsu, and T. Gamo (2003) Stable carbon and oxygen isotopic analysis of trance atmospheric CO and its application to KIE determination during oxidation by soil, 第13回大気化学シンポジウム研究集会講演集(名古屋大学太陽地球研究所), p. 204-207.

(33) 山口潤子・角皆 潤・中川書子・小松大祐・蒲生俊敬・秋山賢二「炭素安定同位体組成を用いた大気中ベンゼンの起源と挙動に関する研究」 第13回大気化学シンポジウム研究集会講演集(名古屋大学太陽地球研究所), p.129-132.

(32) 角皆 潤「熊野灘の泥の山」北海道大学広報誌リテラ・ポプリ、第15号、p.11-12(2003)
[web link]

(31) 藤倉克則・ 青木美澄・藤原義弘・一林信亮・今村牧子・石橋純一郎・岩瀬良一・加藤憲二・小坂紋子・町山栄章・三宅裕志・宮崎淳一・溝田智俊・森本祐介・長沼 毅・中 山典子・岡本和洋・大越健嗣・大越和加・奥谷喬司・佐藤知子・Laszlo G. Toth・土田真二・ 角皆 潤・若松弥記・渡裕美・山中寿朗・山本啓之 (2003)「しんかい2000 システム」による南西諸島海域 鳩間海丘・黒島海丘の化学合成生態系調査(生物・地球化学統合調査)」JAMSTEC深海研究(海洋科学技術センター) 22,21-30.

(30) 山中寿朗・溝田智俊・佐竹洋・蒲生俊敬・上妻史宣・三輪哲也・藤岡換太郎・角皆 潤 (2003)「マリアナ前弧・蛇紋岩海山山頂に発達する化学合成生物群集の安定同位体地球化学」JAMSTEC深海研究(海洋科学技術センター), 22,15-20.

(29) 芦 寿一郎・倉本 真一・森田 澄人・角皆 潤・後藤 秀作・小島 茂明・岡本 拓士・石村 豊穂・井尻 暁・土岐 知弘・工藤 新吾・浅井 聡子・内海 真生 (2002)「熊野沖南海トラフ付加プリズムの地質構造と冷湧水−−YK01-04 Leg2熊野沖調査概要−−」JAMSTEC深海研究 20,1-8 (海洋科学技術センター).

(28) 角皆 潤「研究者だより」日産財団ニュース、第27号、p.7(2002)
[web link]

(27) 斉藤拓也、角皆 潤(2002)「海洋大気中の揮発性炭化水素の測定とその応用」 月刊海洋 34, No.3, p. 202-207

(26) 角皆 潤(2002)「地震発生帯掘削孔における化学計測:意義と課題」月刊地球/号外 36, p. 182-186.

(25) 角皆 潤(2002)「地殻変動をはかる」ぶんせき 2002年10月号, p. 29-33.

(24) 角皆 潤、上妻史宜、中山典子、蒲生俊敬、金子 将(2002)「潜水調査船用多連式ガスタイト海底湧水採取装置の開発と応用」JAMSTEC深海研究 21, 91-95.

(23) 角皆 潤(2001)「冷湧水の起源について」 月刊地球 23, No.12, p. 846-851.

(22) Kuramoto, S., Ashi, J., Greinert, J., Gulick S., Ishimura, T., Morita, S., Nakamura, K., Okada, M., Okamoto, T., Rickert, D., Saito, S., Suess, E., Tsunogai, U., Tomosugi, T. (2001) Surface Observations of Subduction Related Mud Volcanoes and Large Thrust Sheets in the Nankai Subduction Margin; Report on YK00-10 and YK01-04 Cruise, JAMSTEC J. Deep Sea Research 19,131-139 (Japan Marine Science and Technology Center).

(21) Nakagawa, F., U. Tsunogai, T. Gamo, N. Yoshida (2001) Stable Isotopic Studies of Carbon Monoxide in Seawater. Proceedings of the 1st International Symposium on Isotopomers, 283-284.

(20) Yoshida, N., U. Tsunogai, S. Toyoda, F. Nakagawa (1999) Isotopomer analysis of methane and nitrous oxide for the study of their geochemical cycles, Proceedings of the Second International Symposium ”Non-CO2 greenhouse gases: Scientific understanding, control and implementation” 185-188.

(19) 角皆 潤、脇田 宏、芦寿一郎、蒲生俊敬 (1997) 南海トラフ・竜洋海底谷冷湧水の化学組成, JAMSTEC深海研究13, p. 503-508.

(18) 角皆 潤(1997)海洋におけるメタンプルームの炭素安定同位体比測定、月刊地球号外18, p.93-98.

(17) 角皆 潤、石橋純一郎、脇田 宏、蒲生俊敬(1996)島弧火成活動により放出される熱水溶存メタンの起源:海底熱水系と陸上の熱水系の比較、月刊地球号外 16, p.34-39.

(16) 角皆 潤、石橋純一郎、脇田 宏、蒲生俊敬、飯笹幸吉、リチャード・フィスケ、仲 二郎 (1995) 伊豆・小笠原弧、北ベヨネーズ海底カルデラの熱水活動、JAMSTEC深海研究 11, p.333-339.

(15) 飯笹 幸吉・フィスケ リチャード S.・仲 二郎・角皆 潤(1995):明神海丘(北ベヨネース海底カルデラ)の熱水活動に伴う鉱化作用,JAMSTEC深海研究,11, p.341-350.

(14) 石橋純一郎、大森 保、園田 朗、ジョン・ラプトン、デイヴィド・バターフィールド、下島公紀、角皆 潤、ケヴィン・ロー、ジョージス・パラディス、ジェームス・ジェンドロン、ゲリー・マソス (1995) 「しんかい6500」による南部東太平洋海膨海底熱水活動の地球化学的研究、JAMSTEC深海研究 11, p. 157-165.

(13) 角皆 潤、脇田 宏 (1995) 兵庫県南部地震前の地下水の化学組成の変化、月刊地球/号外 13, 190-193.

(12) Fujioka, K., G. Massoth, C.d. Ronde, A. Tanaka-Nakano, J. Gendron, M. Kinoshita, A. Nisizawa, O. Okano, G. Paradis, K. Roe, M. Shinohara, K. Shitashima, U. Tsunogai and N. Ytow (1995) MODE'94: Active Hydrothermal Systems of a Super-fast Spreading Ridges, Southern East Pacific Rise (13�。58'S to 18�。26'S). InterRidge News 4, p. 7-10.

(11) Sakai, H., S. Kanayama, K. Nakashima, U. Tsunogai, J. Ishibashi and H. Chiba (1995) Carbon sources of the hydrothermal water actives in the mid-Okinawa Trough, Izu and Ogasawara, Japan. J. Mineral. Petrol. 15, p. 63-71.

(10) 角皆 潤、石橋純一郎、脇田 宏、蒲生俊敬、増沢敏行、中塚 武 (1994) 相模湾初島南東沖「冷湧水」の起源:「しんかい2000」第721潜航の結果、 JAMSTEC深海研究 10, p. 395-403.

(09) 石橋 純一郎, 角皆 潤, 脇田 宏, 渡辺 一樹, 梶村 徹, 芝田 厚, 藤原 義弘, 橋本 惇 (1994) 伊豆小笠原弧,七曜海山列の海底熱水系の主要成分組成. JAMSTEC深海研究 10, p. 89-97.

(08) 蒲生 俊敬, 千葉 仁, フライヤー パトリシア, 石橋 純一郎, 石井 輝秋, ジョンソン リン E., ケリー ケヴィン, 益田 晴恵, 太田 秀, レイゼンバッハ アナ ルイーズ, ロナ ピーター A., 柴田 次夫, 玉岡 迅, 田中 宏明, 角皆 潤, 山口 寿之, 藤岡 換太郎 (1994): 「しんかい6500」によるマリアナ海域潜航調査1992(Y9204航海):中部熱水域の再訪及び南部海域における熱水ベントの発見. JAMSTEC深海研究 10, p. 153-162.

(07) 中島 和夫, 酒井 均, 金山 晋司, 石橋 純一郎, 角皆 潤 (1994): 沖縄トラフ,クラムサイト周辺の熱水変質と溶存気体成分組成:「しんかい2000」第678潜航報告. JAMSTEC深海研究 10, p. 281-290.

(06) 蒲生 俊敬, 石橋 純一郎, 下島 公紀, 中塚 武, 角皆 潤, 増沢 敏行, 酒井 均, 満沢 巨彦 (1994) 東部南海トラフ付加体における冷湧水の化学的性質(KAIKO−TOKAI計画):「しんかい6500」潜航#113報告. JAMSTEC深海研究 10, p. 343-352.

(05) 角皆 潤、石橋純一郎、脇田 宏、渡辺一樹、梶村 徹、橋本 惇 (1993) 伊豆小笠原弧、水曜海山・木曜海山の海底熱水系の溶存気体組成、 しんかいシンポジウム報告書 9, p. 91-103.

(04) 益田 晴恵・蒲生 俊敬・フライヤー パトリシア・石井 輝秋・ジョンソン リン E.・田中 宏明・角皆 潤・松本 哲志・升本 真二・藤岡 換太郎 (1993) 南部マリアナトラフの主要化学成分からみた火成作用と地形との関係,しんかいシンポジウム報告書, 9, ,181-189 (海洋科学技術センター).

(03) 千葉 仁・中島 和夫・蒲生 俊敬・石橋 純一郎・角皆 潤・酒井 均(1993) 沖縄トラフ南奄西海丘の海底熱水活動:熱水の地球化学的特徴,しんかいシンポジウム報告書,9, 271-282,(海洋科学技術センター).

(02) Gamo, T., H. Chiba, P. Fryer, J. Ishibashi, T. Ishii, L.E. Johnson, K. Kelly, H. Masuda, S. Ohta, A.-L. Reysenbach, P.A. Rona, T. Shibata, J. Tamaoka, H. Tanaka, U. Tsunogai and T. Yamaguchi (1993) Revisits to the mid-Mariana Trough hydrothermal site and discovery of new venting in the southern Mariana region by the Japanese submersible Shinkai 2000. InterRidge News 2, 11-14.

(01) 中島 和夫・酒井 均・吉田 広樹・千葉 仁・田中 善孝・蒲生 俊敬・石橋 純一郎・角皆 潤(1993)「沖縄トラフ伊平屋凹地と南奄西海丘の熱水性 沈殿物の鉱物組成と流体包有物:「しんかい2000」第621潜航報告及び第487潜航と第622潜航の熱水性沈殿物について」しんかいシンポジウム報告書 9, 253-269 (海洋科学技術センター).


角皆 潤・蒲生俊敬 (2016)「10.4 間隙水の採取と分析」(日本地質学会「海洋底科学の基礎」編集委員会編「海洋底科学の基礎」p.233-241)(共立出版)



「生物学辞典」(石川 統・黒岩常祥・塩見正衞・松本忠夫・守 隆夫・八杉貞雄・山本正幸編、東京化学同人、2010)[contents]


角皆 潤 (2008)「第11章 炭素循環と環境変化」(沢田健・綿貫豊・栃内新・馬渡峻輔編「地球の変動と生物進化」、300ページ、2008年3月31日刊行、北海道大学出版、ISBN:978-4-8329-8184-3)、p.239-257[contents]

角皆 潤 (2007)「メタンハイドレートと地球環境」(地球化学講座第7巻「環境の地球化学」第5章)(倍風館)、161-182.

角皆 潤ほか84名 (2007)「環境化学」(第5版実験化学講座20-2巻)(丸善).

角皆 潤 (2001) 「海底のメタンは陰の主役」(海洋学会編「海と環境-海が変わると地球が変わる-」p.159-170)、講談社サイエンティフィック

吉田尚弘・角皆 潤・豊田 栄・河村圭美(訳) (1998) 「地球環境の未来を探る-水・物質サイクルの変動と変化-」(丸善出版)


The 31th Oceanochemistry Award, Research Institute for Oceanochemistry Foundation: 2016
[第31回海洋化学学術賞(石橋賞)(一般財団法人 海洋化学研究所2016年04月23日)]

The Geochemical Society of Japan Award for Young Researchers, The Geochemical Society of Japan: 2000

The 13th and 14th Murao Award for Science, The Murao Scholarship Foundation: 1997

Recipient of the Bounty for Presentation at ICOG-8, The Mass Spectrometry Society of Japan: 1994

Tracing atmospheric Benzene using stable isotopes as tracers: 2005

In-situ analyzer of fluid dissolved greenhouse gases: 2003
Multi-bottle gas-tight seawater sampler (WHATS): 2002