Jonaotaro ONODERA


Jonaotaro ONODERA

Institute of Arctic Climate and Environment Research (IACE),
Research Institute for Global Change (RIGC)
Senior Scientist


Institute of Arctic Climate and Environment Research (IACE),
Research Institute for Global Change (RIGC), JAMSTEC
2-15 Natsushima-cho, Yokosuka 237-0061, JAPAN

Research Interests

  • Monitoring on material transportation and marine ecosystems in Pacific Arctic Ocean
  • Biological oceanography (diatoms, silicoflagellates), micropaleontology, paleoceanography

Curriculum Vitae

1979 birth in Iwate Pref. Japan
2001 B.Sc., Geology, Shinshu University
2003 M.Sc., Earth & Planetary Sciences, Kyushu University
2006 D.Sc., Earth & Planetary Sciences, Kyushu University
2006-2007 JSPS Research Fellow at Kyushu University
2007-2010 Postdoc researcher at Center for Advanced Marine Core Research, Kochi University
2010-2012 JSPS Research Fellow at Paleceanography research team, RIGC, JAMSTEC
2012-2014 Scientist at Paleceanography research team, RIGC, JAMSTEC
2014-2019 Senior Scientist at Marine Ecosystem Dynamics Research Group, RCGC, JAMSTEC
2019- Senior Scientist at Arctic Marine Ecosystem Research Group, IACE, RIGC, JAMSTEC


  • 43. Kawaguchi, Y., Itoh, M., Fukamachi, Y., Moriya, E., Onodera, J., Kikuchi, T., Harada, N. (in press) A year-round observation of sea-ice drift and near-inertial internal waves in the Northwind Abyssal Plain, Arctic Ocean. Polar Science (in press)
  • 42. Tokuhiro, K., Abe, Y., Matsuno, K., Onodera, J., Fujiwara, A., Harada, N., Hirawake, T., Yamaguchi, A. (2019) Seasonal phenology of four dominant copepods in the Pacific sector of the Arctic Ocean: Insights from statistical analyses of sediment trap data. Polar Science 19, 94-111. doi: 10.1016/j.polar.2018.08.006
  • 41. Fujiwara, A. Nishino, S., Matsuno, K., Onodera, J., Kawaguchi, Y., Hirawake, T., Suzuki, K., Inoue, J., Kikuchi, T. (2018) Changes in phytoplankton community structure during wind‑induced fall bloom on the central Chukchi shelf. Polar Biology 41, 1279-1295. doi: 10.1007/s00300-018-2284-7
  • 40. Asahi, H., Takahashi, K., Okazaki, Y., Onodera, J. (2018) Paleoceanography of the Bering Sea advanced by IODP Expedition 323: significant roles playing for global circulation and climate change. Journal of Geological Society of Japan 124, 17-34. (in Japanese with English abstract)
  • 39. Watanabe, E., Onodera, J., Itoh, M., Nishino, S., Kikuchi, T. (2017) Winter transport of subsurface warm water toward the Arctic Chukchi Borderland. Deep-Sea Research I 128, 115-130. doi: 10.1016/j.dsr.2017.08.009
  • 38. Iwasaki, S., Takahashi, K., Kanematsu, Y., Asahi, H., Onodera, J., Ravelo, A.C. (2016) Paleoproductivity and paleoceanography of the last 4.3 Myrs at IODP Expedition 323 Site U1341 in the Bering Sea based on biogenic opal content. Deep-Sea Research II 125-126, 145-154, doi: 10.1016/j.dsr2.2015.04.005
  • 37. Kato, Y., Onodera, J., Suto, I., Teraishi, A., Takahashi, K. (2016) Pliocene and Pleistocene paleoceanography in the western subarctic Pacific based on diatom analysis of ODP leg 145 Hole 884B and IODP expedition 323 Holes U1341B and U1343E. Deep-Sea Research II 125-126, 29-37, doi: 10.1016/j.dsr2.2015.04.004
  • 36. Onodera J., Nagatomo, R. Takahashi, K. (2016) Diatoms, silicoflagellates, and ebridians at Site U1341 on the western slope of Bowers Ridge, IODP Expedition 323. Deep-Sea Research II 125-126, 8-17. doi: 10.1016/j.dsr2.2013.03.025
  • 35. Onodera, J., Watanabe, E., Nishino, S., Harada, N. (2016) Distribution and vertical fluxes of silicoflagellates, ebridians, and the endoskeletal dinoflagellate Actiniscus in the western Arctic Ocean. Polar Biology 39, 327-341, doi: 10.1007/s00300-015-1784-y
  • 34. Teraishi, A., Suto, I., Onodera, J., Takahashi, K. (2016) Diatom, silicoflagellate and ebridian biostratigraphy and paleoceanography in IODP 323 Hole U1343E at the Bering slope site. Deep-Sea Research II 125-126, 18-28. doi:10.1016/j.dsr2.2013.03.026
  • 33. Horikawa, K., Martin, E.E., Basak, C., Onodera, J., Seki, O., Sakamoto, T., Ikehara, M., Sakai, S., Kawamura, K. (2015) Pliocene cooling enhanced by flow of low-salinity Bering Sea water to the Arctic Ocean. Nature Communications 6, 7587, doi: 10.1038/ncomms8587
  • 32. Ikenoue, T., Bjørklund, K.R., Kruglikova, S.B., Onodera, J., Kimoto, K., Harada, N. (2015) Flux variations and vertical distributions of siliceous Rhizaria (Radiolaria and Phaeodaria) in the western Arctic Ocean: indices of environmental changes. Biogeosciences 12, 2019-2046. doi: 10.5194/bg-12-2019-2015
  • 31. Matsuno, K., Yamaguchi, A., Fujiwara, A., Onodera, J., Watanabe, W., Harada, N., Kikuchi, K. (2015) Seasonal changes in the population structure of dominant planktonic copepods collected using a sediment trap moored in the western Arctic Ocean. Journal of Natural History 49, 2711-2726. doi: 10.1080/00222933.2015.1022613
  • 30. Nishino, S., Kawaguchi, Y., Inoue, J., Hirawake, T., Fujiwara, A., Futsuki, R., Onodera, J., Aoyama, M. (2015) Nutrient supply and biological response to wind-induced mixing, inertial motion, internal waves, and currents in the northern Chukchi Sea. Journal of Geophysical Research: Oceans 120, 1975-1992. doi: 10.1002/2014JC010407
  • 29. Onodera, J., Watanabe, E., Harada, N., Honda, M.C. (2015) Diatom flux reflects water-mass conditions on the southern Northwind Abyssal Plain, Arctic Ocean. Biogeosciences 12, 1373-1385. doi:10.5194/bg-12-1373-2015
  • 28. Watanabe, E., Onodera, J., Harada, N., Aita, M.N., Ishida, A., Kishi, M.J. (2015) Wind-driven interannual variability of sea ice algal production in the western Arctic Chukchi Borderland. Biogeosciences 12, 6147–6168. doi: 10.5194/bg-12-6147-2015
  • 27. Yokoi, N., Matsuno, K., Ichinomiya, M., Yamaguchi, A., Nishino, S., Onodera, J., Inoue, J., Kikuchi, T. (2016) Short-term change in a microplankton community in the Chukchi Sea during autumn: consequences of a strong wind event. Biogeosciences 13, 913-923, doi: 10.5194/bf-13-913-2016
  • 26. Matsuno, K., Yamaguchi, A., Fujiwara, A., Onodera, J., Watanabe, E., Imai, I., Chiba, S., Harada, N., Kikuchi, T. (2014) Seasonal changes in mesozooplankton swimmers collected by sediment trap moored at a single station on the Northwind Abyssal Plain in the western Arctic Ocean. Journal of Plankton Research 36, 490-502. doi: 10.1093/plankt/fbt092
  • 25. Onodera, J., Ohashi, A., Takahashi, K., Honda, M.C. (2014) Time-series variation of diatom valve ¬fluxes at Station K2 in the western Subarctic Pacific. Diatom 30, 104-121. (in Japanese with English abstract)
  • 24. Watanabe, E., Onodera, J., Harada, N., Honda, M.C., Kimoto, K., Kikuchi, T., Nishino, S., Matsuno, K., Yamaguchi, A., Ishida, A., Kishi, M.J. (2014) Enhanced role of eddies in the Arctic marine biological pump. Nature Communications 5, Art. No. 3950, doi: 10.1038/ncomms4950 (Corrigendum: Nature Communications 6, Art. No. 8441)
  • 23. Onodera, J. (2013) Sinking flux and paleoceanographic study of diatoms and silicoflagellates in the western North Pacific, Bering Sea, and the Arctic Ocean. Oceanography in Japan 22, 47-69. (in Japanese with English abstract)
  • 22. Onodera, J., Takahashi, K. (2012) Oceanographic conditions influencing silicoflagellate flux assemblages in the Bering Sea and North Pacific Ocean during 1990-1994. Deep-Sea Research II 61-64, 4-16.
  • 21. Okazaki, Y., Sagawa, T., Asahi, H., Horikawa, K., and J. Onodera (2012) Ventilation changes in the western North Pacific since the last glacial period. Climate of the Past 8, 17-24.
  • 20. Onodera, J., Okazaki, Y., Takahashi, K., Okamura, K., Murayama, M. (2011) Distribution of polycystine Radiolaria, Phaeodaria and Acantharia in the Kuroshio Current off Shikoku and Tosa Bay during Cruise KT07-19 in August 2007. Memoirs of the Faculty of Science, Kyushu University. Series D, Earth and Planetary Sciences 32(3), 39-61.
  • 19. Onodera, J., Takahashi, K., Onishi, H., and M. Yanada (2009) Diatom floral fluxes a Stations AB and SA in the Bering Sea and the northern Subarctic Pacific, 1990-1998. Oceanography in Japan18, 307-322. (in Japanese with English abstract)
  • 18. Ogawa, J., Takahashi, K., Yamanaka, T., and J. Onodera (2009) Significance of euxinic condition in the middle Eocene paleo-Arctic basin: A geochemical study on the IODP Arctic Coring Expedition 302 sediments. Earth and Planetary Science Letters 285, 190-197.
  • 17. Takahashi, K., Onodera, J., and Y. Katsurada (2009) Relationship between time-series diatom fluxes in the central and western equatorial Pacific and ENSO-associated migrations of the Western Pacific Warm Pool. Deep-Sea Research I 56, 1298–1318.
  • 16. Onodera, J., Takahashi, K., Kobayashi, F., Ono, I., and Y. Katsurada (2009) Diatom sinking fluxes in the western and central Equatorial Pacific during 1999-2002: Summary and data. Memoirs of the Faculty of Sciences, Kyushu University, Series D, Earth and Planetary Sciences 32, 15-44.
  • 15. Onodera, J., and K. Takahashi (2009) Long-term diatom fluxes in response to oceanographic conditions at Stations AB and SA in the central subarctic and the Bering Sea, 1990-1998. Deep-Sea Research I 56, 189-211.
  • 14. Takahashi, K., Onodera, J., and K. Katsuki (2009) Significant populations of seven-sidedDistephanus (Silicoflagellata) in the sea-ice covered environment of the central Arctic Ocean, summer 2004. Micropaleontology 55(2-3), 313-325.
  • 13. Katsuki, K., Takahashi, K., Onodera, J., Jordan, R.W., and I. Suto (2009) Living diatoms in the vicinity of the North Pole, summer 2004. Micropaleontology 55(2-3), 137-170.
  • 12. Onodera, J., and K. Takahashi (2009) Middole Eocene ebridians from the central Arctic Basin.Micropaleontology 55(2-3), 187-208.
  • 11. Onodera, J., and K. Takahashi (2009) Taxonomy and biostratigraphy of middle Eocene silicoflagellates in the central Arctic Basin. Micropaleontology 55(2-3), 209-248.
  • 10. Onodera, J., Takahashi, K., and R.W. Jordan (2008) Eocene silicoflagellate and ebridian paleoceanography in the central Arctic Ocean. Paleoceanography 23, PA1S15.
  • 09. Swann, G.E.A., Leng, M.J., Sloane, H.J., Maslin, M.A., and J. Onodera (2007) Diatom oxygen isotopes: Evidence of a species effect in the sediment record. Geochemistry Geophysics Geosystems8, Q06012.
  • 08. Onodera, J., and K. Takahashi (2007) Diatoms and siliceous flagellates (silicoflagellates, ebridians, and endoskeletal dinoflagellate Actiniscus) from the Subarctic Pacific. Memoirs of the Faculty of Sciences, Kyushu University. Series D, Earth and Planetary Sciences 31, 105-136.
  • 07. Brinkhuis, H., Schouten, S., Collinson, M.E., Sluijs, A., Sinninghe Damsté, J.S., Dickens, G.R., Huber, M., Cronin, T.M., Onodera, J., Takahashi, K., Bujak, J.P., Stein, R., van der Burgh, J., Eldrett, J.S., Harding, I.C., Lotter, A.F., Sangiorgi, F., van Konijnenburg-van Cittert, H., de Leeuw, J.W., Matthiessen, J., Backman, J., Moran, K., and the Expedition 302 Scientists (2006) Episodic fresh surface waters in the Eocene Arctic Ocean. Nature 441, 606-609.
  • 06. Moran, K., Backman, J., Brinkhuis, H., Clemens, S.C., Cronin, T., Dickens, G.R., Eynaud, F., Gattacceca, J., Jakobsson, M., Jordan, Michael Kaminski, M., King, J., Koc, N., Krylov, A., Martinez, N., Matthiessen, J., McInroy, D., Moore, T.C., Onodera, J., O’Regan, M., Pälike, H., Rea, B., Rio, D., Sakamoto, T., Smith, D.C., Stein, R., St John, K., Suto, I., Suzuki, N., Takahashi, K., Watanabe, M., Yamamoto, M., Farrell, J., Frank, M., Kubik, P., Jokat, W., and Y. Kristoffersen (2006) The Cenozoic palaeoenvironment of the Arctic Ocean. Nature 441, 601-605.
  • 05. Okazaki, Y., Onodera, J., Takahashi, K., and M.C. Honda (2005) Temporal and spatial flux changes of radiolarians in the northwestern Pacific Ocean during 1997-2000. Deep-Sea Research II, 52, 2240-2274.
  • 04. Onodera, J., Katsuki, K., Takahashi, K., and R.W. Jordan (accepted) LM Atlas of Diatoms from the northwestern North Pacific. In: Jordan, R., and Takahashi, K. (Eds.), Atlas of North Pacific Diatoms.Micropaleontology Monographs, accepted.
  • 03. Onodera, J., and K. Takahashi (2005) Silicoflagellate fluxes and environmental variations in the northwestern North Pacific during 1997-2000. Deep-Sea Research I 52, 371-388.
  • 02. Onodera, J., Takahashi, K., and M.C. Honda (2005) Pelagic and coastal diatom fluxes and the environmental changes in the northwestern North Pacific during 1997-2000. Deep-Sea Research II 52, 2218-2239.
  • 01. Onodera, J., Takahashi, K., and M.C. Honda (2003) Diatom fluxes at Station KNOT in the western subarctic Pacific, 1997-2000. Bulletin of the Plankton Society of Japan 50, 1-15. (In Japanese with English abstract)

Contribution to Society

2019- Editorial Board of Marine Micropaleontology


Principal Investigator

  • JSPS Grant-in-Aid for Scientific Research (A) No. 15H01736 (2015-2019)
    “Impact assessment of sea ice loss and oceanic eddy for biological pump in the western Arctic Ocean”
  • Grant-in-Aid for JSPS Research Fellow No. 10J05808 (2010-2012)
    “Response of phytoplankton ecosystems to climate change in North Pacific, Bering Sea, and Arctic Ocean”
  • JSS The Sasakawa Scientific Research Grant No. 20-735M (2008)
    “Paleoceanographic reconstruction in Eocene Arctic Ocean based on silicoflagellate and ebridian microfossil assemblages”
  • Grant-in-Aid for JSPS Research Fellow No. 10J05808 No. 05J05978 (2005-2006)
    “Siliceous phytoplankton assemblage and paleoceanographic reconstruction in Arctic and North Pacific Ocean”


  • JSPS Grant-in-Aid for Scientific Research (B) No. 18H03368 (2018-2020)
    “Destiny of Arctic ice algae facing rapid sea ice decline” (PI: Eiji Watanabe, JAMSTEC)
  • JSPS Grant-in-Aid for Scientific Research (B) No. 18H01292 (2018-2020)
    マイワシレジームの最大個体数を百年規模で減少させた北西太平洋の海洋プロセスの解明 (PI: Michinobu Kuwae, Ehime Univ.)
  • JSPS Grant-in-Aid for Scientific Research (B) No. 26287129 (2014-2016)
    “Mechanism of the late Miocene global cooling driven by decline of CO2” (PI: Osamu Seki, Hokkaido Univ.)