Jun Nishioka

Jun Nishioka.JPG

Jun Nishioka Ph.D                                                           

Pan-Okhotsk research center,

Institute of low temperature science,                      

Hokkaido University                                                        nishioka@lowte.hokudai.ac.jp

Sapporo, Japan.                                                                    

 

Education and Experience:

 

2005 – Present:   Associate Professor

           Institute of low temperature science, Hokkaido University, Hokkaido, Japan.

2001: Doctor of Philosophy

         Hokkaido University, Thesis title: “Application of size-fractionation method to study biogeochemical   

           dynamics of iron in the North Pacific Ocean”.

1999 – 2005:       Senior Researcher

         Central Research Institute of Electric Power Industry, Chiba, Japan

1998 – 1999:       Visiting Researcher

         Institute of Ocean Sciences, Victoria, Canada

1995 – 1998:       Researcher

         Central Research Institute of Electric Power Industry, Chiba, Japan

1993 – 1995:      Master degree

         Hokkaido University, Graduate school of Fisheries Science, Hokkaido, Japan.

1989 – 1993:       Bachelor degree

         Hokkaido University, Faculty of Fisheries Science, Hokkaido, Japan.

 

Additional Roles:

 

2017 Sep.– Present:         Member

 GEOTRACES Data Management committee

2017 Feb. – Present:        Member

 SOLAS Scientific steering committee

2016 – Present:   Associate member

 SCOR working group 151 – Iron model intercomparison project (FeMIP)

2015 – Present:   Councilor member

 The Oceanographic Society of Japan

2013 – Present:   Associate Editor

    Journal of Oceanography

2012 – 2014:                  

    Guest Editor; Progress in Oceanography

2011 – 2015:  Associate member

    SCOR working group on Biogeochemical Exchange Processes at the Sea-Ice Interfaces (BEPSII)

2007 – 2010:  Member

      WG22, Iron supply and its impact on biogeochemistry and ecosystems in the North Pacific, PICES

2005 – 2007:  Associate member

Iron Fertilization Experiment Advisory Panel, PICES

 

Ongoing :

Peer reviewer for Global Biogeochemical Cycles, Marine Chemistry, Polar Science, Biogeosciences, Deep Sea Research, Continental shelf Research, Journal of Geophysical Research, Journal of Experimental Marine Biology and Ecology, Journal of Oceanography, etc.

 

Research Interests:

Trace metal biogeochemical cycle in the Ocean, Polar oceanography and sea-ice biogeochemistry, Artificial and natural iron fertilization in the Ocean, Controlling mechanisms for primary production in the Ocean, Nutrient dynamics in the Ocean, Ocean mixing and biogeochemical cycle, North Pacific HNLC water formation,

 

 

Research field:

 

North Pacific, Arctic Ocean, Indian Ocean, Southern Ocean, Sea of Okhotsk

 

Involved projects:

1996 – 1999:          Open-Ocean Plankton Ecosystem study (Japan-Canada joint project)

2000:                      EisanEx, Iron fertilization experiment in the Southern Ocean (NIOZ visiting researcher)

2001:                      SEEDS, Iron fertilization experiment in the western subarctic Pacific (Japanese project)

2002:                      SERIES, Iron fertilization experiment in the eastern subarctic Pacific (Japan-Canada joint project)

2003 – 2008:          Oyashio time series Fe dynamics study (Japanese project)

2004:                      SEEDS II, Iron fertilization experiment in the western subarctic Pacific (Joint project Japan-Canada-US)

2005 – 2009:          Amur-Okhotsk Project (Joint project Japan-Russia-China)

2007 – 2011:          Western Pacific Air-Sea interaction Study (Japanese project)

2010 – 2015:          Okhotsk sea biogeochemical cycle (Japanese project)

2012 – 2015:          Sea-ice ecosystem and biogeochemistry (Japanese project)

2013 – 2015:          New Ocean Paradigm on its biogeochemistry, ecosystem and sustainable  (Japanese project)

2009 – Present:      Japanese GEOTRACES (International project)

2015 – Present:      Arctic Challenge for Sustainability Project (Japanese project)

2015 – Present:      Ocean mixing Processes -Impact on Biogeochemsitry, Climate and Ecosystem- (Japanese project)

 

 

Publications:

Total citations= 4322 (as of May 2021 from Researcher ID)

H-index= 32 (as of May 2021 from Researcher ID)

Nishioka, J., H. Obata, T. Hirawake, Y. Kondo, Y. Yamashita, K. Misumi, I. Yasuda, A review: iron and nutrient supply in the subarctic Pacific and its impact on phytoplankton production, J. Oceanogr., doi:10.1007/s10872-021-00606-5, (2021). 

Nomura, D., H. Abe, T. Hirawake, A. Ooki, Y. Yamashita, A. Murayama, K. Ono, J. Nishioka, Formation of dense shelf water associated with sea ice freezing in the Gulf of Anadyr estimated with oxygen isotopic ratio, Prog. Oceanogr., 10.1016/j.pocean.2021.102595, (2021). 

Tazoe, H., H. Amakawa, K. Suzuki, J. Nishioka, T. Hara, H. Obata, Determination of Nd isotopic composition in seawater using newly developed solid phase extraction and MC-ICP-MS, Talanta 232, doi:10.1016/j.talanta.2021.122435, (2021)

Sato, M., J. Nishioka, K. Maki, S. Takeda, Chemical speciation of iron in the euphotic zone along the Kuroshio Current, Mar. Chem. 233, doi:10.1016/j.marchem.2021.103966, (2021). 

Misumi, K., J. Nishioka, H. Obata, D. Tsumune, T. Tsubono, M. C. Long, K. Lindsay, J. K. Moore, Slowly Sinking Particles Underlie Dissolved Iron Transport Across the Pacific Ocean, Glob. Biogeochem. Cycles, doi:10.1029/2020GB006823, (2021). 

Kishi, S., K. I. Ohshima, J. Nishioka, N. Isshiki, S. Nihashi, S. C. Riser, The prominent spring bloom and its relation to sea-ice melt in the Sea of Okhotsk, revealed by profiling floats, Geophys. Res. Lett., doi:org/10.1029/2020GL091394, (2021). 

Mori, Y., J. Nishioka, S. Fujio, Y. Yamashita, Transport of dissolved black carbon from marginal sea sediments to the western North Pacific, Prog. Oceanogr., doi:10.1016/j.pocean.2021.102552. (2021). 

Yamashita, Y., T. Tosaka, R. Bamba, R. Kamezaki, S. Goto, J. Nishioka, I. Yasuda, T. Hirawake, J. Oida, H. Obata, H. Ogawa, Widespread distribution of allochthonous fluorescent dissolved organic matter in the intermediate water of the North Pacific, Prog. Oceanogr. 191, doi.org/10.1016/j.pocean.2020.102510, (2021). 

Alwi, W., K. H. Wong, H. Fukuda, H. Ogawa, A. Suzuki Mashio, Y. Kondo, J. Nishioka, H. Obata, Wide-range detection of Cu-binding organic ligands in seawater using reverse titration, Mar. Chem. 230, doi.org/10.1016/j.marchem.2021.103927 (2021).

Kondo, Y., R. Bamba, H. Obata, J. Nishioka, S. Takeda, Distinct profiles of size-fractionated iron-binding ligands between the eastern and western subarctic Pacific, Sci. Rep., doi.org/10.1038/s41598-021-81536-6, (2021).

Tanaka, T., D. Hasegawa, I. Yasuda, D. Yanagimoto, S. Fujio, H. Nakamura, R. Inoue, J. Nishioka, Enhanced vertical turbulent nitrate flux in the intermediate layer of the Kuroshio in the Tokara Strait, J. Oceanogr., doi.org/10.1007/s10872-020-00581-3, (2021). 

Dobashi, R., H. Ueno, Y. Okada, T. Tanaka, J. Nishioka, T. Hirawake, A. Ooki, S. Itoh, D. Hasegawa, Y. Sasai, H. Sasaki, I. Yasuda, Observations of anticyclonic eddies in the western subarctic North Pacific, J. Oceanogr., doi.org/10.1007/s10872-020-00586-y, (2021). 

Wong, K. H., H. Obata, T. Kim, Y. Kondo, J. Nishioka, New insights into the biogeochemical cycling of copper in the Subarctic Pacific: Distributions, size fractionation and organic complexation, Limnol. Oceanogr., doi:10.1002/lno.11695, (2021). 

Yasuda, I., S. Masuda, J. Nishioka, X. Guo, N Harada, S. Ito, T. Hibiya, H. Hasumi, Ocean mixing processes (OMIX): impact on biogeochemistry, climate and ecosystem, J. Oceanogr. 77(1), 1-1, doi:10.1007/s10872-020-00578-y, (2020). 

Miyazaki, Y., K. Suzuki, E. Tachibana, Y. Yamashita, A Müller, K. Kawana, J. Nishioka, New index of organic mass enrichment in sea spray aerosols linked with senescent status in marine phytoplankton, Sci. Rep., doi.org/10.1038/s41598-020-73718-5, (2020). 

Kawaguchi, Y., J. Nishioka, S. Nishino, S. Fujio, K. Lee, A. Fujiwara, D. Yanagimoto, H. Mitsudera, I. Yasuda, Cold water upwelling near the Anadyr Strait: Observations and Simulations, J. Geophys. Res.-Ocean, doi:10.1029/2020JC016238, (2020). 

Kanna, N., S. Sugiyama, Y. Fukamachi, D. Nomura, J. Nishioka, Iron supply by subglacial discharge into a fiord near the front of a marine-terminating glacier in northwestern Greenland, Glob. Biogeochem. Cycles, doi.org/10.1029/2020GB006567, (2020). 

Yan, D, K. Yoshida, J. Nishioka, M. Ito, T. Toyota, K. Suzuki, Response to sea ice melt indicates high seeding potential of the ice diatom Thalassiosira to spring phytoplankton bloom: A laboratory study on an ice algal community from the Sea of Okhotsk, Front. Mar. Sci., doi:10.3389/fmars.2020.00613 (2020).

Hirawake, T., M. Uchida, H. Abe, I. D. Alabia, T. Hoshino, S. Masumoto, A. Mori, J. Nishioka, B. Nishizawa, A. Ooki, A. Takahashi, Y. Tanabe, M. Tojo, M. Tsuji, H. Ueno, H. Waga, Y. Watanabe, A. Yamaguchi, Y. Yamashita, Response of Arctic biodiversity and ecosystem to environmental change: Findings from ArCS project, Polar Sci., doi.org/10.1016/j.polar.2020.100533, (2020). 

Inoue, M., R. Takehara, S. Hanaki, H. Kameyama, J. Nishioka, S. Nago, Distribution of radiocesium and radium isotopes in the western Bering Sea in 2018, Mar. Chem. 225, 103843, doi.org/10.1016/j.marchem.2020.103843, (2020). 

Nishioka, J., H. Obata, H. Ogawa, K. Ono, Y. Yamashita, K. Lee, S. Takeda, I. Yasuda, Sub-polar marginal seas fuel the North Pacific through the intermediate water at the termination of the global ocean circulation, Proc. Natl. Acad. Sci. USA, 117 (23) 12665-12673, doi:10.1073/pnas.2000658117, (2020). 

Kanna, N., D. Lannuzel, P. van der Merwe, J. Nishioka, Size fractionation and bioavailability of iron released from melting sea ice in the subpolar marginal sea, Mar. Chem., doi.org/10.1016/j.marchem.2020.103774, (2020).

Yamashita, Y., J. Nishioka, H. Obata, and H. Ogawa, Shelf humic substances as carriers for basin-scale iron transport in the North Pacific, Sci. Rep. 10, 4505, https://doi.org/10.1038/s41598-020-61375-7, (2020).

Yoshida, T., S. Nakamura, J. Nishioka, S. B. Hooker, and K. Suzuki, Community composition and photosynthetic physiology of phytoplankton in the western subarctic Pacific near the Kuril Islands with special reference to iron availability, J. Geophys. Res. – Biogeosciences, 125, e2019JG005525, doi: 10.1029/2019JG005525, (2020). 

 

Kuroda, H., Y. Toya, T. Watanabe, J. Nishioka, D. Hasegawa, Y. Taniuchi, A. Kuwata, Influence of coastal Oyashio water on massive spring diatom blooms in the Oyashio area of the North Pacific Ocean, Prog. Oceanogr. 175, 328-334, doi.org/10.1016/j.pocean.2019.05.004, (2019). 

Tanaka, T., D. Hasegawa, I. Yasuda, H. Tsuji, S. Fujio, Y. Goto, J. Nishioka, Enhanced vertical turbulent nitrate flux in the Kuroshio across the Izu Ridge, J. Oceanogr. 75, 2, 195-203, doi.org/10.1007/S10872-018-0500-2, (2019). 

Evans,L.K., J. Nishioka, Accumulation processes of trace metals into Arctic sea ice: distribution of Fe, Mn and Cd associated with ice structure, Mar. Chem., doi.org/10.1016/j.marchem.2018.11.011, (2019). 

Isada, T., A. Hattori-Saito, H. Saito, Y. Kondo, J. Nishioka, K. Kuma, H. Hattori, R. M. L. Mckay, K. Suzuki, Responses of phytoplankton assemblages to iron availability and mixing water masses during the spring bloom in the Oyashio region, NW Pacific, Limnol. Oceanogr. 64, 1, 197-216, doi.org/10.1002/lno.11031, (2019). 

Kanna,N., Y. Sibano, T. Toyota, J Nishioka, Winter iron supply processes fueling spring phytoplankton growth in a sub-polar marginal sea, the Sea of Okhotsk: Importance of sea ice and the East Sakhalin Current, Mar. Chem. 206, 109-120, doi.org/10.1016/j.marchem.2018.08.006, (2018). 

Evans,L.K., J. Nishioka, Quantitative analysis of Fe, Mn and Cd from sea ice and seawater in the Chukchi Sea, Arctic Ocean, Polar Sci. 17, 50-58, doi.org/10.1016/j.polar.2018.07.002 (2018).

 

Schlitzer (J. Nishioka, 287人中、176番目) et al., The GEOTRACES Intermediate Data Product 2017, Chem. Geol. 493, 210-223, doi.org/10.1016/j.chemgeo.2018.05.040 (2018). 

 

Miyazaki, Y., T. Yamashita, K. Kawana, E. Tachibana, S. Kagami, M. Mochida, K. Suzuki, and J. Nishioka, Chemical transfer of dissolved organic matter from surface seawater to sea spray water-soluble organic aerosol in the marine atmosphere, Sci. Rep. 8, 14861, doi.org/10.1038/s41598-018-32864-7, (2018). 

Mizuno, Y., J. Nishioka, T. Tanaka, Y. Tada, K. Suzuki, Y. Tsuzuki, A. Sugimoto, Y. Yamashita, Determination of the freshwater origin of Coastal Oyashio Water using humic-like fluorescence in dissolved organic matter, J. Oceanogr. 74, 509-521, doi:10.1007/s10872-018-0477-x, (2018). 

Yoshimura, T., J. Nishioka, H. Ogawa, A. Tsuda, Dynamics of particulate and dissolved organic and inorganic phosphorus during the peak and declining phase of an iron-induced phytoplankton bloom in the eastern subarctic Pacific, J. Mar. Syst. 177, 1-7, doi: 10.1016/j.jmarsys.2017.09.004 (2018).

Jing, H., S. Cheung, X. Xia, K. Suzuki, J. Nishioka, H. Liu, Geographic Distribution of Ammonia-Oxidizing Archaea along the Kuril Islands in the Western Subarctic Pacific, Front. Microbiol., 30, doi.org/10.3389/fmicb.2017.01247, (2017). 

Kim, T., H. Obata, J. Nishioka, T. Gamo, Distribution of dissolved zinc in the western and central subarctic pacific, Glob. Biogeochm. Cycles 31 (9) 1454-1468, doi: 10.1002/2017GB005711 (2017). 

Endo, H., H. hattori, T. Mishima, G. Hashida, H. Sasaki, J. Nishioka, K. Suzuki, Phytoplankton community responses to iron and CO2 enrichment in different biogeochemical regions of the Southern Ocean, Polar Biol. 40 (11), 2143-2159, doi: 10.1007/s00300-017-2130-3 (2017). 

Nishioka, J. and H. Obata, Dissolved iron distribution in the western and central subarctic Pacific - HNLC water formation and biogeochemical processes -, Limnol. Oceanogr., 2004-2022, doi.org/10.1002/lno.10548,(2017). 

Ito, M., K. I. Ohshima, Y. Fukamachi, G. Mizuta, Y. Kusumoto, J. Nishioka, Observations of frazil ice formation and upward sediment transport in the Sea of Okhotsk: A possible mechanism of iron supply to sea ice, J. Geophys. Res.-Ocean, doi: 10.1002/2016JC012198 (2017). 

Tazoe, H., H. Obata, M. Tomita, S. Namura, J. Nishioka, T. Yamagata, Z. Karube, M. Yamada, Novel method for low level Sr-90 activity detection in seawater by combining oxalate precipitation and chelating resin extraction, Geochem. J., 51, 3-197, doi.org/10.2343/geochemj.2.0441 (2017). 

Obata, H., J. Nishioka, T. Kim, K. Norisuye, S. Takeda, Y. Wakuta, T. Gamo, Dissolved iron and zinc in Sagami Bay and the Izu-Ogasawara Trench, J. Oceanogr. 73, 333-344, doi: 10.1007/s10872-016-0407, (2017). 

Nakanowatari, T., T. Nakamura, K. Uchimoto, J. Nishioka, H. Mitsudera, M. Wakatsuchi, Importance of Ekman transport and gyre circulation chamge on seasonal variation of surface dissolved iron in the western subarctic North Pacific, J. Geophys. Res.-Ocean 122, 4364-4391, doi: 10.1002/2016JC012354 (2017).

小畑 元、金 泰辰、西岡 純、 北太平洋亜寒帯における鉄の供給過程、 海の研究, 26(3), 79-93, (2017).

平譯 享、高尾信太郎、鈴木光次、西岡 純、渡邉 豊、伊佐田 智規、 衛星による海洋基礎生産力の推定、海の研究, 26(3), (2017). 

Tanaka, T., I. Yasuda, K. Kuma, J. Nishioka, Evaluation of the biogeochemical impact of iron-rich shelf water to the Green Belt in the southeastern Bering Sea, Conti. Shelf Res. 130-138, doi.org/10.1016/j.csr.2016.11.008 (2016). 

Lannuzel, D., M. Vancoppenolle, P. van der Merwe, J. de Jong, K. M. Meiners, M. Grotti, J. Nishioka, V. Schoemann, Iron in sea ice: Review and new insights, Elementa, 4: 000130, doi: 10.12952/journal.elementa.000130, (2016). 

Kanna N. and J. Nishioka, Bio-availability of iron derived from subarctic first-year sea ice, Mar. Chem. 186, 189-197, doi:org/10.1016/j.marchem.2016.09.009, (2016). 

Tanaka, K., N. Takesue, J. Nishioka, Y. Kondo, A. Ooki, K. Kuma, T. Hirawake, Y. Yamashita, The conservative behavior of dissolved organic carbon in surface waters of the southern Chukchi Sea, Arctic Ocean, during early summer, Sci. Rep. 6, doi: 10.1038/srep34123, (2016). 

Inoue, M., Y. Shirotani, S. Nagao, H. Kofuji, Y.N. Volkov, J. Nishioka, Migration of the FDNPP-derived 134Cs and 137Cs along with 226Ra and 228Ra concentrations across the northwestern North Pacific Ocean, J. Environ. Radioact. 162, 33-38, doi.org/10.1016/j.jenvrad.2016.05.011, (2016). 

Mawji, E., (J. Nishioka, 136人中81番目) et al., The GEOTRACES Intermediate Data Product 2014,Mar. Chem. 177, 1-8, (2015). 

Yamashita, Y., C. J. Lu, H. Ogawa, J. Nishioka, H. Obata, H. Saito, Application of an in situ fluorometer to determine the distribution of fluorescent organic matter in the open ocean, Mar. Chem. 177, 298-305 (2015).

Tsuda, A., H. Saito, H. Kasai, J. Nishioka, T. Nakatsuka, Vertical segregation and population structure of ontogenetically migrating copepods Neocalanus cristatus, N. flemingeri, N. plumchrus, and Eucalanus bungii during the ice-free season in the Sea of Okhotsk, J. Oceanogr. 71, 271-285 (2015). 

Miller, L. A., F. Fripiat, B. GT Else, J. S. Bowman, K. A. Brown, R. E. Collins, M. Ewert, A. Fransson, M. Gosselin, D. Lannuzel, K. M. Meiners, C. Michel, J. Nishioka, D. Nomura, S. Papadimitriou, L. M. Russell, L. L. Sørensen, D. N. Thomas, J.-L. Tison, M. A. van Leeuwe, M. Vancoppenolle, E. W. Wolff, J. Zhou, Methods for biogeochemical studies of sea ice: The state of the art, caveats, and recommendations, Elementa, 1-53, doi: 10.12952/journal.elementa.000038, (2015). 

Kim, T. H. Obata, T. Gamo, J. Nishioka, Sampling and onboard analytical methods for determining subnanomolar concentrations of zinc in seawater, Limnol. Oceanogr.: Methods, 13:1, 30-39 (2015). 

Ito, M., Y. W. Watanabe, M. Shigemitsu, J. Nishioka, Application of chemical tracers to an estimate of benthic denitrification in the Okhotsk Sea, J. Oceanogr. 70, 415–424, doi.org/10.1007/S10872-014-0241-9, (2014). 

Yoshimura, J. Nishioka, H. Ogawa, K. Kuma, H. Saito, A. Tsuda, Dissolved organic phosphorus production and decomposition during open ocean diatom blooms in the subarctic Pacific, Mar. Chem. 165, 45-54, doi:10.1016/j.marchem.2014.08.003, (2014). 

Hioki, N., K. Kuma, Y. Morita, R. Sasayama, A. Ooki, Y. Kondo, H. Obata, J. Nishioka, Y. Yamashita, S. Nishino, T. Kikuchi, M. Aoyama, Laterally spreading iron, humic-like dissolved organic matter and nutrients in cold, dense subsurface water of the Arctic Ocean, Sci. Rep. 4, 6775, doi:10.1038/srep06775, (2014). 

Kuma, K., R. Sasayama, N. Hioki, Y. Morita, Y. Isoda, T. Hirawake, K. Imai, T. Aramaki, T. Nakamura, J. Nishioka, N. Ebuchi, Chemical evidence for the origin of the cold water belt along the northeastern coast of Hokkaido, J. Oceanogr. 70:4, 126, 377-387 (2014). 

Nishioka, J., I. Yasuda, H. Liu, T. Nakatsuka, Y.N. Volkov, Biogeochemical and physical processes in the Sea of Okhotsk and the linkage to the Pacific Ocean; Preface, Prog. Oceanogr. 126, 1-7, doi:10.1016/j.pocean.2014.04.027, (2014). 

 

Nishioka, J., T. Nakatsuka, K. Ono, Y.N. Volkov, A. Scherbinin, T. Shiraiwa, Quantitative evaluation of iron transport processes in the Sea of Okhotsk, Prog. Oceanogr. 126, 180-193, doi:10.1016/j.pocean.2014.04.011, (2014). 

Yoshimura, T., K. Sugie, H. Endo, K. Suzuki, J. Nishioka, T. Ono, Organic matter production response to CO2increase in open subarctic plankton communities: Comparison of six microcosm experiments under iron-limited and -enriched bloom conditions, Deep Sea Res. I, 94, 1-14, doi:10.1016/j.dsr.2014.08.004, (2014).

Kanna, N., T. Toyota, J. Nishioka, Iron and macro-nutrient concentrations in sea ice and their impact on the nutritional status of surface waters in the southern Okhotsk Sea, Prog. Oceanogr. 126, 44-57, doi:10.1016/j.pocean.2014.04.012, (2014). 

Itoh, S., Y. Tanaka, S. Osafune, I. Yasuda, M. Yagi, H. Kaneko, S. Konda, J. Nishioka, Y.N. Volkov, Direct breaking of large-amplitude internal waves in the Urup Strait, Prog. Oceanogr. 126, 109-120, doi:10.1016/j.pocean.2014.04.014, (2014).

Itoh, H., J. Nishioka, A. Tsuda, Community structure of mesozooplankton in the western part of the Sea of Okhotsk in summer, Prog. Oceanogr. 126, 224-232, doi:10.1016/j.pocean.2014.05.008, (2014).

Tanaka, Y., I. Yasuda, S. Osafune, T. Tanaka, J. Nishioka, Y.N. Volkov, Internal tides and turbulent mixing observed in the Bussol Strait, Progr. Oceanogr. 126, 98-108, doi:10.1016/j.pocean.2014.04.009, (2014). 

Uchimoto, K., T. Nakamura, J. Nishioka, H. Mitsudera, K. Misumi, D. Tsumune, M. Wakatsuchi, Simulation of high concentration of iron in dense shelf water in the Okhotsk Sea, Prog. Oceanogr. 126, 194-210, doi:10.1016/j.pocean.2014.04.018, (2014). 

Suzuki, K., A. Hattori-Saito, Y. Sekiguchi, J. Nishioka, M. Shigemitsu, T. Isada, H. Liu, R.M.L. Mckay, Spatial variability in iron nutritional status of large diatoms in the Sea of Okhotsk with special reference to the Amur River discharge, Biogioscience 11, 2503-2517, doi:10.5194/bg-11-2503-2014, (2014). 

 

Nishioka, J., T. Nakatsuka, Y. W. Watanabe, I. Yasuda, K. Kuma, H. Ogawa, N. Ebuchi, A. Scherbinin, Y. N. Volkov, T. Shiraiwa and M. Wakatsuchi, Intensive mixing along an island chain controls oceanic biogeochemical cycles, Glob. Biogeochem. Cycles 27, 1–10, doi:10.1002/gbc.20088, (2013). 

Nishioka, J., Obata, H., Tsumune, D., Evidence of an extensive spread of hydrothermal dissolved iron in the Indian Ocean, Earth Planet. Sci. Lett. 361, 26-33, doi:org/10.1016/j.epsl.2012.040, (2013). 

Sugie, K., H. Endo, K. Suzuki, J. Nishioka, H. Kiyosawa and T. Yoshimura, Synergistic effects of pCO2 and iron availability on nutrient consumption ratio of the Bering Sea phytoplankton community, Biogioscience 10, 6309-6321, doi:10.5194/bg-10-6309-2013, (2013).

Yoshimura, T., K. Suzuki, H. Kiyosawa, T. Ono, H. Hattori, K. Kuma, J. Nishioka, Impacts of elevated CO2 on particulate and dissolved organic matter production: microcosm experiments using iron-deficient plankton communities in open subarctic waters, J. Oceanogr. 69, 601–618, DOI 10.1007/s10872-013-0196-2, (2013).

Shigemitsu, M., J. Nishioka, Y.W. Watanabe, Y. Yamanaka, T. Nakatsuka, Y.N. Volkov, Fe/Al ratios of suspended particulate matter from intermediate water in the Okhotsk Sea: Implications for long-distance lateral transport of particulate Fe, Mar. Chem. 157, 41-48, (2013). 

Sugie, K., J. Nishioka, K. Kuma, Y. N. Volkov, and T. Nakatsuka, Availability of particulate Fe to phytoplankton in the Sea of Okhotsk, Mar. Chem. 152, 20-31 (2013). 

Watanabe, Y. W., J. Nishioka, and T. Nakatsuka, Decadal time evolution of oceanic uptake of anthropogenic carbon in the Okhotsk Sea, Geophys. Res. Lett. 40, 1–5, doi:10.1002/grl.50113, (2013). 

Isada, T., T. Iida, H. Liu, S. Saitoh, J. Nishioka, T. Nakatsuka, and K. Suzuki, Influence of Amur River discharge on phytoplankton photophysiology in the Sea of Okhotsk during late summer, J. Geophys. Res.-Ocean 118, 4, 1995–2013, doi:10.1002/jgrc.20159, (2013). 

Kondo, Y., S. Takeda, J. Nishioka, M. Sato, H. Saito, K. Suzuki, K. Furuya, Growth stimulation and inhibition of natural phytoplankton communities by model organic ligands in the western subarctic Pacific, J. Oceanogr. 69, 1 97-115, doi: 10.1007/s10872-012-0160-6, (2013). 

Shigemitsu, M., T. Okunishi, J. Nishioka, H. Sumata, T. Hashioka, M. N. Aita, S. L. Smith, N. Yoshie, N. Okada, and Y. Yamanaka, Development of a one-dimensional ecosystem model including the iron cycle applied to the Oyashio region, western subarctic Pacific, J. Geophys. Res.-Ocean, doi:10.1029/2011jc007689, (2012).

Tanaka, T. I. Yasuda, K, Kuma, J. Nishioka, Vertical turbulent iron flux sustains the Green Belt along the shelf break in the southeastern Bering Sea, Geophys. Res. Lett. 39, L08603, doi:10.1029/2012gl051164, (2012).

Misumi, K., D. Tsumune, Y. Yoshida, K. Uchimoto, T. Nakamura, J. Nishioka, H. Mitsudera, F. Bryan, K. Lindsay, J. Moore, S. C. Doney, Mechanisms controlling dissolved iron distribution in the North Pacific: A model study, J. Geophys. Res.-Biogeosciences, doi:10.1029/2010JG001541 (2011). 

Uchimoto, K., T. Nakamura, J. Nishioka, H. Mitsudera, M. Yamamoto-Kawai, K. Misumi, and D. Tsumune, Simulations of chlorofluorocarbons in and around the Sea of Okhotsk: Effects of tidal mixing and brine rejection on the ventilation, J. Geophys. Res.-Ocean 116, C02034, doi:10.1029/2010JG001541, (2011). 

Nishioka, J., T. Ono, H. Saito, K. Sakaoka, T. Yoshimura, Oceanic iron supply mechanisms which support the spring diatom bloom in the Oyashio region, western subarctic Pacific, J. Geophys. Res.-Ocean 116, C02021, doi:10.1029/2010JC006321, (2011). 

杉山昌広、西岡 純、藤原正智、気候工学(ジオエンジニアリング)、天気 58、7、3-24、 (2011).

Itoh, S., I. Yasuda, M. Yagi, S. Osafune, H. Kaneko, J. Nishioka, T. Nakatsuka, Y. N. Volkov, Strong vertical mixing in the Urup Strait, Geophys. Res. Lett. 38, doi.org/10.1029/2011GL048507, (2011). 

Radchenko, V.I., Dulepova, E.P., Figurkin, A.L., Katugin, O.N., Ohshima, K., Nishioka, J., McKinnell, S.M., Tsoy, A.T., Status and trends of the Sea of Okhotsk region, 2003-2008, pp. 268-299 In S.M. McKinnell and M.J. Dagg [Eds.], Marine Ecosystems of the North Pacific Ocean, 2003-2008. PICES Special Publication 4, 393 p. (2010).

Jing, H., H. Liu, K. Suzuki, R. Sohrin, J. Nishioka, Community compositions of Bacteria and Archaea in the Sea of Okhotsk during summer, Aqua. Microbi. Ecol 61:191-204, https://doi.org/10.3354/ame01450, (2010). 

Tsuda, A., K. Fukami, H. Kiyosawa, K. Suzuki, S. Takeda, J. Nishioka, Mac Takahashi, K. Johnson, C.S.Wong, Response of lower trophic organisms to nutrient input ant effects on carbon budjet: a mesocosm experiment, Plankton Benthos Res. 5(4), 144-155 (2010).

Boye, M., J. Nishioka, P. Croot, P. Laan, K. R. Timmermans, V. H. Strass, S. Takeda, H. J. W. de Baar, Significant portion of dissolved organic Fe-complexes in fact is Fe colloids, Mar. Chem. 122, 20-27, doi: 10.1016/j.marchem.2010.09.001, (2010). 

Yoshimura T, J. Nishioka, K. Suzuki, H. Hattori, H. Kiyosawa, Y. W. Watanabe, Impacts of elevated CO2 on phytoplankton community composition and organic carbon dynamics in nutrient-depleted Okhotsk Sea surface waters. J. Exp. Mar. Biol. Ecol. 395, 191-198, doi: 10.1016/j.jembe2010.09.001, (2010).

 

Ito, S., I. Yasuda, T. Nakatsuka, J. Nishioka, Y. N. Volkov, Fine- and microstructure observations in the Urup Straight, Kuril Islands, during August 2006, J. Geophys. Res. 115 (8) C08004, doi:10.1029/2009JC005629, (2010). 

Yoshimura, T., J. Nishioka, T. Nakatsuka, Iron nutritional status of the phytoplankton assemble in the Okhotsk Sea during summer, Deep Sea Res. I, doi: 10.1016/j.dsr.2010.08.003, (2010). 

Yamashita, Y., R. M. Cory, J. Nishioka, K. Kuma, E. Tanoue, R. Jaffe, Fluorescence characteristics of dissolved organic matter in the deep waters of the Okhotsk Sea and northwestern North Pacific Ocean, Deep Sea Res. II 57 (16), 1478-1485, (2010). 

Nomura, D., J. Nishioka, M. A. Granskog, A. Krell, S. Matoba, T. Toyota, H. Hattori, K. Shirasawa, Nutrient distributions associated with snow and sediment-laden layers in sea ice of the southern Sea of Okhotsk, Mar. Chem. 119, 1-8, (2010). 

Hattori, A., J. Nishioka, T. Ono, R. M. L. McKay, K. Suzuki, Iron deficiency in micro-sized diatom in the Oyashio region of the western subarctic Pacific during spring, J. Oceanogr. 66, 105-115, (2010). 

Yoshie, N., K. Suzuki, A. Kuwata, J. Nishioka, H. Saito, Temporal and spatial variations in photosynthetic physiology of diatoms during the spring bloom in the western subarctic Pacific, Mar. Ecol. Prog. Ser. 399:39-52, https://doi.org/10.3354/meps08329, (2010). 

Nishioka, J., S. Takeda, Y. Kondo, H. Obata, T. Doi, D. Tsumune, C. S. Wong, W. K. Johnson, A. Tsuda, Changes in iron concentrations and bio-availability during an open ocean mesoscale iron enrichment experiment in the western subarctic pacific, SEEDS II, Deep Sea Res. II, doi:10.1016/j.dsr2.2009.06.006, (2009). 

Saito, H., A. Tsuda, Y. Nojiri, T. Aramaki, H. Ogawa, T. Yoshimura, K. Imai, I. Kudo, J. Nishioka, T. Ono, K. Suzuki, S. Takeda, Biogeochemical cycling of N and Si during the mesoscale iron-enrichment experiment in the western subarctic Pacific (SEEDS II), Deep Sea Res. II, doi:10.1016/j.dsr2.2009.06.010, (2009). 

Suzuki, K., H. Saito, T. Isada, A. Hattori-Saito, H. Kiyosawa, J. Nishioka, R. M. L. McKay, A. Kuwata, A. Tsuda, Community structure and photosynthetic physiology of phytoplankton in the northwest subarctic pacific during in situ iron fertilization experiment (SEEDS-II), Deep Sea Res. II, doi:10.1016/.dsr2.2009.06.001, (2009). 

Nakatsuka, S., K. Okamura, S. Takeda, J. Nishioka, M. L. Firdaus, K. Norisuye, Y. Sohrin, Behaviors of dissolved and particulate Co, Ni, Cu, Zn, Cd, and pB during a mesoscale Fe enrichment experiment (SEEDS II) in the western north Pacific, Deep Sea Res. II, doi:10.1016/j.dsr2.2009.06.008, (2009).

Yoshimura, Y., H. Ogawa, K. Imai, T. Aramaki, Y. Nojiri, J. Nishioka, A. Tsuda, Dynamics and elemental stoichiometry of carbon, nitrogen, and phosphorus in particulate and dissolved organic pools during a phytoplankton bloom induced by in situ iron enrichment in the western subarctic Pacific (SEED II), Deep Sea Res. II, doi:10.1016/j.dsr2.2009.06.011 (2009). 

Higgins, J. L., I. Kudo, J. Nishioka, A. Tsuda, S. W. Wilhelm, The response of the virus community to the SEEDS II mesoscale iron fertilization, Deep Sea Res. II, doi:10.1016/j.dsr2.2009.06.005, (2009). 

Tsumune, D., J. Nishioka, A. Shimamoto, Y. W. Watanabe, T. Aramaki, Y. Nojiri, S., Takeda, A. Tsuda, T. Tsubono, Physical behaviors of the iron-fertilized patch in SEEDS II, Deep Sea Res. II, doi:10.1016/j.dsr2.2009.07.004, (2009). 

Watanabe, Y. W, J. Nishioka, S. Shigemitsu, A. Mimura, T. Nakatsuka, Influence of riverine alkalinity on carbonate species in the Okhotsk Sea, Geophys. Res. Lett. 36(15), doi:10.1029/2009GL038520, (2009).

Liu, H., K. Suzuki, J. Nishioka, R. Sohrin, T. Nakatsuka, Phytoplankton growth and microzooplankton grazing in the Sea of Okhotsk during late summer of 2006, Deep Sea Res. I, 56(4), 561-570, doi:10.1016/j.dsr.2008.12.003, (2009).

Ooki, A, J. Nishioka, T. Ono, S. Noriki, Size dependence of iron solubility of Asian mineral dust particles, J. Geophys. Res. 114, D03202, doi:10.1029/2008JD010804, (2009). 

Kondo, Y., S. Takeda, J. Nishioka, H. Obata, K. Furuya, W. K. Johnson, and C. S. Wong, Organic iron (III) complexing ligands during an iron enrichment experiment in the western subarctic North Pacific, Geophys. Res. Lett. 35, L12601, doi:10.1029/2008GL033354, (2008). 

Tsuda, A., S. Takeda, H. Saito, J. Nishioka, I. Kudo, Y. Nojiri, K. Suzuki, M. Uematsu, M. L. Wells, D. Tsumune, T. Yoshimura, T. Aono, T. Aramaki, W. P. Cochlan, M. Hayakawa, K. Imai, T. Isada, Y. Iwamoto, W. K. Johnson, S. Kameyama, S. Kato, H. Kiyosawa, Y. Kondo M. Levasseur, R. Machida, I. Nagao, F. Nakagawa, T. Nakanishi, S. Nakatsuka, A. Narita, Y. Noiri, H. Obata, H. Ogawa, T. Ono, T. Sakuragi, M. Sasakawa, M. Sato, A. Shimamoto, H. Takata, C. G. Trick, Y. W. Watanabe, C. S. Wong, N. Yoshie, Evidence for the grazing hypothesis: grazing reduces phytoplankton responses of the HNLC ecosystem to iron enrichment in the western subarctic Pacific (SEED II). J. Oceanogr. 63: 983-994 (2007). 

 

Nishioka, J., T. Ono, H. Saito, et al., T. Nakatsuka, S. Takeda, T. Yoshimura, K. Suzuki, K. Kuma, S. Nakabayashi, D. Tsumune, H. Mitsudera, W. K. Johnson, A. Tsuda, Iron supply to the western subarctic Pacific, importance of iron export from the Sea of Okhotsk, J. Geophys. Res. 112, C10012, doi:10.1029/2006JC004055, (2007). 

Yoshimura, T, J. Nishioka, H. Saito, S. Takeda, A. Tsuda and M. L. Wells, Distributions of particulate and dissolved organic and inorganic phosphorus in North Pacific surface waters., Mar. Chem. 103, 1-2, 112-121, (2007). 

 西岡 純、北太平洋における鉄の存在状態と鉄が生物生産におよぼす影響に関する研究、海の研究 15、1、19-36、(2006).

Wong, C.S. W.K. JohnsonN. Sutherland, J. Nishioka, D.A. Timothy, M. Robert, S. Takeda, Iron speciation and dynamics during SERIES, a mesoscale iron enrichment experiment in the NE Pacific, Deep Sea Res. II 53, 20-22, 2075-2094, (2006). 

Kudo, I., Y. Noiri, H. Kyosawa, J. Nishioka and A. Tsuda, Phytoplankton community response to Fe and temperature gradient in the NE (SERIES) and NW(SEED) subarctic Pacific Ocean, Deep Sea Res. II 53, 20-22, 2201-2213, (2006). 

Iwade, S., K. Kuma, Y. Isoda, M. Yoshida, I. Kudo, J. Nishioka and K. Suzuki, Effect of high iron concentrations on iron uptake and growth of a coastal diatom Chaetoceros sociale. Aquatic. Microbial. Ecol. 43, 177-191, (2006). 

Tsuda, A, H. Saito, J. Nishioka, T. Yoshimura, T. Ono, Y. Noiri, I. Kudo, Mesozooplankton responses to iron enrichment during the diatom bloom and declining periods in the NE Pacific (SERIES), Deep Sea Res. II, 53, 20-22, 2281-2296, (2006). 

 Saito H., A. Tsuda, Y. Nojiri, J. Nishioka, S. Takeda, H. Kiyosawa, I. Kudo, Y. Noiri, T. Ono, Y. Taira, K. Suzuki, T. Yoshimura, P. W. Boyd, M. Levasseur, Nutrients and phytoplankton dynamics during the stationary to declining phases of the phytoplankton bloom induced by iron-enrichment in the eastern subarctic Pacific, Deep Sea Res. II, 53, 20-22, 2168-2181 (2006).

Saito, H, T. Ohta, K. Suzuki, J. Nishioka, A. Tsuda, Role of heterotrophic dinoflagellate Gyrodinium sp. in the fate of an iron induced diatom bloom. Geophys. Res. Lett. 33, L09602, doi:10.1029/2005GL025366, (2006).

De Baar, H., P. W. Boyd, K. H. Coale, M. R. Landry, A. Tsuda, P. Assmy, D. C. E.Bakker, Y. Bozec, R. T. Barbar, M. A. Brzezinski, K. O. Buesseler, M. Boye, P. L. Croot, F. Gervais, M. Y. Gorbunov, P. J. Harrison, W. T. Hiscock, P. Laan, C. Lancelot, C. Law, M. Levasseur, A. Marchetti, F. J. Millero, J. Nishioka, Y. Nojiri, T. van Oijen, U. Riebesell, M. J. A. Rijkenberg, H. Saito, S. Takeda, K. R. Timmermans and M. J. W. Veldhuis, Synthesis of 8 Iron Fertilization Experiments: from the Iron Age in the Age of Enlightenment, J. Geophis. Res.-Ocean, doi: 10.1029/2004JC002601, (2005). 

Boye, M., J. Nishioka, P. L. Croot, P. Laan, K. R. Timmermans and H .J. W. de Baar, Major deviation of iron complexation during 22 days of a mesoscale iron enrichment in the open Southern Ocean, Mar. Chem. 96, 257-271, (2005). 

Nishioka, J., S. Takeda, H. J. W. de Baar, Patric Laan, P. L. Croot, M. Boye, K. R. Timmermans, Change in the concentrations of iron in different size fractions during an iron fertilization experiment in the open Southern Ocean, Mar. Chem. 95, 51-63, (2005). 

Croot, P. L., P. Laan. J. Nishioka, V. Strauss, M. Boye, K. Timmermanss, R. G. Bellerby, L. Goldson, P. Nightingale, H. J. W. de Baar, Spatial and Temporal distribution of Fe (II) and H2O2 during EisenEx, an open ocean mesoscale iron enrichment, Mar. Chem. 95, 65-88, (2005). 

Ramaiah, N., S. Takeda, K. Furuya, T. Yoshimura, J. Nishioka, T. Aono, Y. Nojiri, K. Imai, I. Kudo, H. Saito and A. Tsuda, Effect of iron enrichment on the dynamics of transparent exopolymer particles in the western subarctic Pacific, Prog. Oceanogr. 64, 253-262, (2005). 

Tsumune, D., J. Nishioka, A. Shimamoto, S. Takeda and A. Tsuda, Physical behavior of the SEEDS iron-fertilized patch by sulphur hexafluoride tracer release, Prog. Oceanogr. 64, 111-128, (2005). 

Noiri, Y., I. Kudo, H. Kiyosawa, J. Nishioka, A. Tsuda, Influence of iron and temperature on growth, nutrient utilization ratios and phytoplankton species composition in the western subarctic Pacific Ocean during the SEEDS experiment, Prog. Oceanogr. 64. 149-166, (2005). 

Tsuda A., H. Kiyosawa, A. Kuwata, M. Mochizuki, N. Shiga, H. Saito, S. Chiba, K., Imai, J. Nishioka, T. Ono, N. Lundholm, Responses of diatoms to iron-enrichment in the western subarctic Pacific, and comparison of species composition with those of surrounding area, Prog. Oceanogr. 64. 189-206, (2005). 

Kudo, I., Y. Noiri, K. Imai, Y. Nojiri, J. Nishioka and A. Tsuda, Primary productivity and nitrogenous nutrient assimilation dynamics during the Subarctic Pacific Iron Experiment for Ecosystem Dynamics Study (SEEDS), Prog. Oceanogr. 64, 207-222, (2005). 

Kinugasa M, T. Ishita , Y. Sohrin , K. Okamura , S. Takeda , J. Nishioka and A. Tsuda, Dynamics of trace metals during the subarctic Pacific iron experiment for ecosystem dynamics study (SEEDS2001), Prog. Oceanogr.64, 129-148, (2005). 

Tsuda, A., H. Saito, J. Nishioka and T. Ono, Mesozooplankton responses to iron-fertilization in the western subarctic Pacific (SEEDS2001), Prog. Oceanogr. 64, 237-252, (2005). 

van Oijen, T., M. J. W. Veldhuis, M. Y. Gorbunov, J. Nishioka, M. A. van Leeuwe, H. J. W. de Baar, Enhanced carbonhydrate production by Southern Ocean phytoplankton in response to in situ iron fertilization, Mar. Chem. 93(1) 33-52, (2004). 

Takata, H., K. Kuma, S. Iwade, Y. Yamajyoh, A. Yamaguchi, S. Takagi, K. Sakaoka, Y. Yamashita, E. Tanoue, T. Midorikawa, K. Kimura and J. Nishioka, Spatial variability of iron in the surface water of the northwestern North Pacific Ocean, Mar. Chem. 86 139-157, (2004). 

Boyd, P. W., C. S. Law, C. S. Wong, Nojiri, Y., A. Tsuda, M. Levasseur, S. Takeda, R. Rivkin, P. J. Harrison, R. Strzepek, J. Gower, R. M. Mckay, E. Abraham, M. Arychuk, J. Barwell-Clarke, W. Crawford, M. Hale, K. Harada, K. Johnson, H. Kiyosawa, I. Kudo, A. Marchetti, W. Miller, J. Needoba, J. Nishioka, H. Ogawa, J. Page, M. Robert, H. Saito, A. Sastri, N. Sherry, T. Soutar, N. Sutherland, Y. Taira, F. Whitney, S. E. Wong, T. Yoshimura, The decline and fate of an iron-induced subarctic phytoplankton bloom, Nature 428, 549-553, (2004). 

Nishioka, J., S. Takeda, I. Kudo, D. Tsumune, T. Yoshimura, K. Kuma and A. Tsuda, Size-fractionated iron and iron-limitation processes in the subarctic NW Pacific, Geophys. Res. Lett. 30, 1730, doi:10.1029/2002GL016853, (2003).

Tsuda, A., S. Takeda, H. Saito, J. Nishioka, Y. Nojiri, I. Kudo, H. Kiyosawa, A. Shiomoto, K. Imai, T. Ono, A. Shimamoto, D. Tsumune, T. Yoshimura, T. Aono, A. Hinuma, M. Kinugasa, K. Suzuki, Y. Sohrin, Y. Noiri, H. Tani, Y. Deguchi, N. Tsurushima, H. Ogawa, K. Fukami, K. Kuma, T. Saino, A mesoscale iron enrichment in the western subarctic Pacific induces large centric diatom bloom, Science 300, 958-961, (2003). 

Tani, H., J. Nishioka, K. Kuma, H. Takata, Y. Yamashita, E. Tanoue and T. Midorikawa, Iron (III) hydroxide solubility and humic-type fluorescent organic matter in the deep water column of Okhotsk Sea and the northwestern North Pacific Ocean, Deep Sea-Res. I 50, 1063-1078, (2003). 

Ono, T., K. Tadokoro, T. Midorikawa, J. Nishioka and T. Saino, Multi-decadal decrease of net community production in western subarctic North Pacific, Geophys. Res. Lett. 29, 8, 10.1029/2001 GL014332, (2002). 

Suzuki, K., A. Tsuda, H. Kiyosawa, S. Takeda, J. Nishioka, T. Saino, M. Takahashi, C. S. Wong. Grazing impact of microzooplankton on a diatom bloom in a mesocosm as estimated by pigment-specific dilution technique, J. Exp. Mar. Biol. Ecol. 271, 99-120, (2002). 

池谷 透、中谷誠治、深堀芳雄、西岡 純、武田重信、川延京子、高橋正征、海洋深層水による亜熱帯表層水の肥沃化効果の屋外メソコスム実験による検証(Evaluation of Fertilization Effects of Deep Ocean Water on Surface Water Phytoplankton community by Mesocosm Experiments in Subtropical Ocean)、海洋深層水研究 2: 73-86、(2001).

Nishioka. J., S. Takeda and C. S. Wong, Change in the concentrations of iron in different size fractions during a phytoplankton bloom in controlled ecosystem enclosures, J. Exp. Mar. Biol. Ecol. 258, 237-255, (2001).

Nishioka, J., S. Takeda, C. S. Wong and W. K. Johnson, Size-fractionated iron concentrations in the northeast Pacific Ocean: distribution of soluble and small colloidal iron, Mar. Chem. 74, 157-179, (2001). 

Nishioka, J., S. Takeda, Change in the concentrations of iron in different size fractions during growth of the Oceanic diatom Chaetoceros sp.: importance of small colloidal iron, Mar. Biol. 137:231-238, (2000).

Matsunaga, K., J. Nishioka, K. Kuma, K. Toya and Y. Suzuki, Riverine Input of Bioavailable Iron Supporting Phytoplankton Growth in Kesennuma Bay (Japan), Water Res. 32(11), 3436-3442, (1998). 

Kuma, K, A. Katsumoto, J. Nishioka and K. Matsunaga, Size-fractionated iron concentrations and Fe(III) hydroxide solubilities in various coastal waters, Est. Coast. Shelf Sci. 47: 275-283, (1998).

Kuma, K, J. Nishioka and K. Matsunaga, Controls on iron(III) hydroxide solubility in seawater: The influence of pH and natural organic chelators, Limnol. Oceanogr. 41: 396-407, (1996). 

 

 

 

Field Experience:

April 2021

Okhotsk sea expedition (Hakodate-Kushiro) aboard the Shinsei-maru, Cruise PI

December 2020

Okhotsk sea expedition (Tokyo-Tokyo) aboard the Hakuho-maru

February 2020          

Okhotsk sea, sea-ice expedition (Otaru-Otaru) aboard the Soya

October 29-December 18 2019          

South east Pacific and Southern Ocean (Honolulu- Puntarenas) aboard the Hokko-maru 

 

September 2019          

Off Akkeshi (Kushiro-Kushiro) aboard the Ushio-maru

February 2019         

Okhotsk sea, sea-ice expedition (Otaru-Otaru) aboard the Soya

July-Sep 2018

Western Bering Sea, (Otaru-Otaru), aboard the Prof. Multanovsky, Cruise PI

January 2018

Oyashio-area, western subarctic Pacific (Kushiro-Kushiro) aboard the Hokko-maru

Oct-Nov 2017         

Western subarctic-subtropical North Pacific, (Tokyo-Tokyo) aboard the Hakuho-maru

June-Aug 2017         

Subarctic North Pacific, GEOTRACES (Tokyo-Vancouver) aboard the Hakuho-maru

February 2017       

Okhotsk sea, sea-ice expedition (Otaru-Otaru) aboard the Soya

December 2016         

Western subtropical North Pacific (Tokyo-Tokyo) aboard the Hakuho-maru

November  2016      

Okhotsk Sea (Hakodate-Abashiri) aboard the Oshoro-maru

June-July  2016       

Western subarctic North Pacific (Tokyo-Hachnohe) aboard the Oshoro-maru

December 2015        

Kuroshio-area, western North Pacific (Nagasaki-Tokyo) aboard the Hakuho-maru

March 2015                

Oyashio-area, western North Pacific (Tokyo-Tokyo) aboard the Hakuho-maru, Cruise PI

December 2014 – January 2015         

Southern Ocean-South Pacific, GEOTRACES (Tokyo- Auckland) aboard the Hakuho-maru

June – July 2014         

East Kamchatka Current (Otaru-Otaru) aboard the Prof. Multanovsky, Cruise PI

February 2014         

Okhotsk sea, sea-ice expedition (Otaru-Otaru) aboard the Soya

January 2014

Oyashio-area, western subarctic Pacific (Kushiro-Kushiro) aboard the Hokko-maru

November 2013         

Okhotsk sea (Otaru-Otaru) aboard the Oshoro-maru

June – July 2013         

Arctic Ocean (Duch-Hurber-Hakodate) aboard the Oshoro-maru

February 2013         

Okhotsk sea, sea-ice expedition (Otaru-Otaru) aboard the Soya

August – October 2012         

Subarctic North Pacific, GEOTRACES (Tokyo-Vancouver) aboard the Hakuho-maru

July 2012         

Subarctic-subtropical western North Pacific (Tokyo-Pohnpei) aboard the Hakuho-maru

February 2012         

Okhotsk sea, sea-ice expedition (Otaru-Otaru) aboard the Soya

July – August 2011         

Okhotsk sea, East Kamchatka (Otaru-Otaru) aboard the Prof. Gordienko, Cruise PI

June 2011         

Japan Sea (Hakodate-Akita) aboard the Oshoro-maru

February 2011         

Okhotsk sea, sea-ice expedition (Otaru-Otaru) aboard the Soya

October – November 2010         

Japan sea - North Pacific (Nagasaki-Hakodate) aboard the Oshoro-maru

October 2010         

Oyashio-areaa, western subarctic Pacific (Kushiro-Kushiro) aboard the Hokko-maru

May – June 2010         

Okhotsk Sea  (Otaru-Otaru) aboard the Prof. Khromov, Cruise PI

February 2010         

Okhotsk sea, sea-ice expedition (Otaru-Otaru) aboard the Soya

November 2009 – January 2010         

Indian Ocean, GEOTRACES (Cochin-Cape Town) aboard the Hakuho-maru

August – September 2009         

Subarctic North Pacific, Bering Sea (Tokyo-Duch Hurber) aboard the Hakuho-maru

June 2009         

Subarctic North Pacific (Hakodate-Duch Hurber) aboard the Oshoro-maru

February 2009         

Oyashio-area, western subarctic Pacific (Hakodate-Hakodate) aboard the Oshoro-maru

July – September 2008        

Western subarctic Pacific (Tokyo-Tokyo) aboard the Hakuho-maru

January 2008        

Oyashio-area, western subarctic Pacific (Kushiro-Kushiro) aboard the Hokko-maru

October 2007        

Oyashio-area, western subarctic Pacific (Kushiro-Kushiro) aboard the Hokko-maru

August – September 2007        

Okhotsk Sea, IPY-GEOTRACES  (Otaru-Otaru) aboard the Prof. Khromov, Cruise PI

May 2007        

Oyashio-area, western subarctic Pacific  (Hakodate-Hakodate) aboard the Oshoro-maru

January 2007       

Oyashio-area, western subarctic Pacific (Kushiro-Kushiro) aboard the Hokko-maru

August – September 2006        

Okhotsk Sea, IPY-GEOTRACES  (Otaru-Otaru) aboard the Prof. Khromov, Cruise PI

January 2006       

Oyashio-area, western subarctic Pacific (Kushiro-Kushiro) aboard the Hokko-maru

December 2005       

Oyashio-area, western subarctic Pacific (Kushiro-Kushiro) aboard the Hokko-maru

October 2005       

Oyashio-area, western subarctic Pacific (Hakodate-Hakodate) aboard the Oshoro-maru

January 2005       

Oyashio-area, western subarctic Pacific (Kushiro-Kushiro) aboard the Hokko-maru

July – August 2004       

Western subarctic Pacific, SEEDS II Fe fertilization experiment (Tokyo-Tokyo) aboard the Hakuho-maru

January 2004       

Oyashio-area, western subarctic Pacific (Kushiro-Kushiro) aboard the Hokko-maru

September – October 2003       

Subarctic North Pacific (Tokyo-Tokyo) aboard the Hakuho-maru

May 2003      

Oyashio-area, western subarctic Pacific (Shiogama-Shiogama) aboard the Wakataka-maru

April 2003      

Oyashio-area, western subarctic Pacific (Shiogama-Shiogama) aboard the Wakataka-maru

March 2003      

Oyashio-area, western subarctic Pacific (Hakodate-Hakodate) aboard the Oshoro-maru

February 2003      

Oyashio-area, western subarctic Pacific (Hakodate-Hakodate) aboard the Oshoro-maru

January 2003       

Oyashio-area, western subarctic Pacific (Kushiro-Kushiro) aboard the Hokko-maru

August – September 2002       

Eastern subarctic Pacific (Sidney-Sidney) aboard the J. P. Tully

June – August 2002       

Eastern subarctic Pacific, SERIES Fe fertilization experiment (Duch-Hurber- Vancouver) aboard the Kaiyo-Maru

June – August 2001       

Western subarctic Pacific, SEEDS I Fe fertilization experiment (Tokyo-Tokyo) aboard the Kaiyo-Maru

October – December 2000       

Southern Ocean, EisenEX Fe fertilization experiment (CapeTown- CapeTown) aboard the POLARSTERN

May – June 2000       

Western subarctic Pacific, Okhotsk Sea (Mutsu-Mutsu) aboard the Mirai

February 1999       

Eastern subarctic Pacific (Sidney-Sidney) aboard the J. P. Tully

August – September 1998       

Eastern subarctic Pacific (Sidney-Sidney) aboard the J. P. Tully

June 1998       

Eastern subarctic Pacific (Sidney-Sidney) aboard the J. P. Tully

December 1997       

Western subarctic Pacific (Shiogama- Shiogama) aboard the Daigo-Kaiko-maru

August – September 1997       

Eastern subarctic Pacific (Sidney-Sidney) aboard the J. P. Tully

August 1995       

Western subarctic Pacific (Shimizu-Yokohama) aboard the Sogen-maru

July 1994       

Western subarctic Pacific (Hakodate-Hakodate) aboard the Hokusei-maru

June – August 1993       

Western subarctic Pacific, Indian Ocean (Hakodate-Hakodate) aboard the Oshoro-maru