Page of Hajime Kawakami                     [Go to Japanese Website]

Hajime Kawakami



Public Relations Division

Japan Agency for Marine-Earth Science and Technology (JAMSTEC)

Address: 2-15 Natsushima-cho Yokosuka 237-0061, Japan

E-mail:

Main Subject of Research

Spread of current marine and earth sciences to the general public.


Past Subject of Research

Strength of biological pump estimated from 234Th

in the northwestern North Pacific.


Comparison of biological pump estimated from 210Po

in the mesopelagic layer between the subarctic and subtropical

western North Pacific.

Educations

Faculty of Fisheries, Hokkaido University, B.S., 1993

Graduate School of Fisheries, Hokkaido University, M.S., 1996

Graduate School of Environmental Science, Hokkaido University, Ph.D., 2009


Professional Experiences

Department of Ocean Research, JAMSTEC, 1997-2001

Frontier Research Promotion Department, 2001-2002

Mutsu Institute for Oceanography, JAMSTEC, 2002-2014

Public Relations Division, JAMSTEC, 2014-


Movies

Miniature Mooring System

Phronima


Publications (reviewed articles)

25. Honda, M.C., Kawakami, H.: Sinking velocity of particulate radiocesium in the northwestern North Pacific. Geophysical Research Letters, 10.1002/2014GL060126 (2014).


24. Kawakami, H., Honda, M.C., Watanabe, S., Saino, T.: Time-series observations of 210Po and 210Pb radioactivity in the western North Pacific. Journal of Radioanalytical and Nuclear Chemistry 301, 461-468 (2014).


23. Fujiki, T., Matsumoto, K., Mino, Y., Sasaoka, K., Wakita, M., Kawakami, H., Honda, M.C., Watanabe, S., Saino, T.: Seasonal cycle of phytoplankton community structure and photophysiological state in the western subarctic gyre of the North Pacific. Limnology and Oceanography 59, 887-900 (2014).


22. Kitamura, M., Kumamoto, Y., Kawakami, H., Cruz, E.C., Fujikura, K.: Horizontal distribution of Fukushima-derived radiocesium in zooplankton in the northwestern Pacific Ocean. Biogeosciences 10, 5729-5738 (2013).


21. Kobari, T., Kitamura, M., Minowa, M., Isami, H., Akamatsu, H., Kawakami, H., Matsumoto, K., Wakita, M., Honda, M.C.: Impacts of the wintertune nesozooplankton community to downward carbon flux in the subarctic and subtropical Pacific Oceans. Deep-Sea Research I 81, 78-88 (2013).


20. Honda, M.C., Kawakami, H., Watanabe, S., Saino, T.: Concentration and vertical flux of Fukushima-derived radiocesium in sinking particles from two sites in the Northwestern Pacific Ocean. Biogeosciences 10, 3525-3534 (2013).


19. Wakita, M., Watanabe, S., Honda, M.C., Nagano, A., Kimoto, K., Matsumoto, K., Kawakami, H., Fujiki, T., Kitamura, M., Sasaki, K., Sasaoka, K., Nakono, Y., Murata, A.: Ocean acidification from 1997 to 2011 in the subarctic western North Pacific Ocean. Biogeosciences 10, 7817-7827 (2013).


18. Fukuda, M., Harada, N., Sato, M., Lange, C. B., Ahagon, N., Kawakami, H., Miyashita, W., Pantoja, S., Matsumoto, T., Motoyama, I.: 230Th-normalized fluxes of biogenic components from the central and southernmost Chilean margin over the past 22,000 years. Geochemical Journal 47, 119-135 (2013).


17. Harada, N., Kawakami, H., Fukuda, M., Miyashita, W., Matsumoto, T.: 230Th-normalized fluxes of biogenic components from the central Chilean margin during the late Quaternary. Journal of Geography 121, 555-569 (2012).


16. Matsumoto, K., Fujiki, T., Honda, M.C., Wakita, M.,Kawakami, H., Kitamura, M., Saino, T.: Inhibition of primary production by nitrile rubber O-rings in Niskin sampler. JAMSTEC Report of Research and Development 14, 17-25 (2012).


15. Honda, M.C., Aono, T., Aoyama, M., Hamajima, Y., Kawakami, H., Kitamura, M., Masumoto, Y., Miyazawa, Y., Takigawa, M., Saino, T.: Dispersion of artificial caesium-134 and -137 in the western North Pacific one month after the Fukushima accident. Geochemical Journal 46, e1-e9 (2012).


14. Shigemitsu, M., Watanabe, Y.W., Yamanaka, Y., Kawakami, H., Honda, M.C.: Relationship between sinking organic matter and minerals in the shallow zone of the western subarctic Pacific. Journal of Oceanography 66, 697-708 (2010).


13. Kawakami, H., Honda, M.C., Matsumoto, K., Fujiki, T., Watanabe, S.: East-west distribution of nutrients and dissolved inorganic carbon in the northern North Pacific in autumn. The Open Oceanography Journal 4, 99-106 (2010).


12. Kawakami, H., Honda, M.C., Matsumoto, K., Fujiki, T., Watanabe, S.: East-west distribution of POC fluxes estimated from 234Th in the northern North Pacific in autumn. Journal of Oceanography 66, 71-83 (2010).


11. Honda, M.C., Sasaoka, K., Kawakami, H., Matsumoto, K., Watanabe, S., Dickey T.D.: Application of underwater optical data to estimation of primary productivity. Deep-Sea Research I 56, 2281-2292 (2009).


10. Kawakami, H.: Scavenging of 210Po and 234Th by particulate organic carbon in the surface layer of the northwestern North Pacific Ocean. Far East Journal of Ocean Research 2, 67-82 (2009).


9. Kawakami, H., Yang Y.-L., Kusakabe, M.: Distributions of 210Po and 210Pb radioactivity in the intermediate layer of the northwestern North Pacific. Journal of Radioanalytical and Nuclear Chemistry 279, 561-566 (2009).


8. Fujiki, T., Matsumoto, K., Honda, M.C., Kawakami, H., Watanabe, S.: Phytoplankton composition in the subarctic North Pacific during autumn 2005. Journal of Plankton Research 31, 179-191 (2009).


7. Kawakami, H., Kusakabe, M.: Surface water mixing estimated from 228Ra and 226Ra in the northwestern North Pacific. Journal of Environmental Radioactivity 99, 1335-1340 (2008).


6. Kawakami, H., Honda, M.C., Wakita., M, Watanabe, S.: Time-series observation of dissolved inorganic carbon and nurtients in the northwestern North Pacific. Journal of Oceanography 63, 967-982 (2007).


5. Kawakami, H., Honda, M.C.: Time-series observation of POC fluxes estimated from 234Th in the northwestern North Pacific. Deep-Sea Research I 54, 1070-1090 (2007).


4. Honda, M.C., Kawakami, H., Sasaoka, K., Watanabe, S., Dickey, T.: Quick transport of primary produced organic carbon to the ocean interior. Geophysical Research Letters 33, 10.1029/2006GL026466 (2006).


3. Kawakami, H., Yang, Y-L., Honda, M. C., Kusakabe, M.: Particulate organic carbon fluxes estimated from 234Th deficiency in winters and springs in the northwestern North Pacific. Geochemical Journal 38, 581-592 (2004).


2. Murata, A., Kumamoto, Y., Saito, C., Kawakami, H., Asanuma, I., Kusakabe, M., Inoue, H.Y.: Impact of a spring phytoplankton bloom on the CO2 system in the mixed layer of the northwestern North Pacific. Deep-Sea Research II 49, 5531-5555 (2002).


1. Kuma, K., Katsumoto, A., Kawakami, H., Takatori, F., Matsunaga, K.: Spatial variability of Fe(III) hydroxide solubility in the water column of the northern North Pacific. Deep-Sea Research I 45, 91-113 (1998).

Others

PADI, Advanced Open Water Diver

Ski Association of Japan, First Degree


[Go to Website of JAMSTEC]