主な研究成果
Watanabe, T. and M. Wakatsuchi.
Formation of 26.8-26.9 σθ water in the Kuril Basin of the Sea of Okhotsk as
a possible origin of North Pacific Intermediate Water.
Journal of Geophysical Research, 103(C2), 2849-2865, 1998.
Kikuchi, T., M. Wakatsuchi and M. Ikeda.
A numerical investigation of the transport process of dense shelf water
from a continental shelf to a slope.
Journal of Geophysical Research, 104(C1), 1197-1210, 1999.
Toyota, T., J. Ukita, K. I. Ohshima, M.
Wakatsuchi and K. Muramoto.
A measurement of sea ice albedo over the southwestern Okhotsk Sea.
Journal of Meteorological Society of Japan, 77, 117-133,
1999.
Kimura N. and M. Wakatsuchi.
Processes controlling the advance and retreat of sea ice in the Sea of
Okhotsk.
Journal of Geophysical Research, 104(C5), 11137-11150, 1999.
Ukita, J., T. Kawamura, N. Tanaka, T.Toyota
and M. Wakatsuchi.
Physical and stable isotopic properties and growth processes of sea ice
collected in the southern Sea of Okhotsk,
Journal of Geophysical Research, 105(C9), 22, 083-22, 093,
2000.
Kimura, N. and M. Wakatsuchi.
Relationship between sea-ice motion and geostrophic wind in the Northern
Hemisphere.
Geophysical Research Letters, 27, 3735-3738, 2000.
Toyota, T., T. Kawamura and
M. Wakatsuchi.
Heat budget in the ice cover of the southern Okhotsk Sea derived from
in-situ observations.
Journal of Meteorological Society of Japan, 78, 585-569,
2000.
Itoh, M. and K. I. Ohshima.
Seasonal variations of water masses and sea level in the southwestern part
of the Okhotsk Sea.
Journal of Oceanography, 56, 643-654, 2000.
Toyota, T. and M. Wakatsuchi.
Characteristic of the surface heat budget during the ice growth season in
the southern Sea of Okhotsk.
Annals Glaciology, 33, 230-236, 2001.
Ohshima K. I., G. Mizuta, M. Itoh, Y.
Fukamachi, T. Watanabe, Y. Nabae, K. Suehiro, and M. Wakatsuchi.
Winter oceanographic conditions in the southwestern part of the Okhotsk Sea
and their relation to sea ice.
Journal of Oceanography., 57, 451-460, 2001.
Aramaki, T., S. Watanabe, T. Kuji and M
Wakatsuchi.
The Okhotsk-Pacific seawater exchange in the viewpoint of vertical profiles
of radiocarbon around the Bussol' Strait.
Geophysical Research Letters, 28, 3971-3974, 2001.
Kimura, N. and M. Wakatsuchi.
Mechanisms for the variation of sea-ice extent in the Northern Hemisphere.
Journal of Geophysical Research, 106(C12), 31319-31332, 2001.
Narita, H., M. Sato, S. Tsunogai, M. Murayama,
M. Ikehara, T. Nakatsuka, M. Wakatsuchi, N. Harada, and Y. Ujiie.
Biogenic opal indicating less productive northwestern North Pacific during
the glacial ages.
Geophysical Research Letters, 29(15), 22.1-22.4.
1029/2001GL014320, 2002.
Matsuoka, T., S. Uratsuka, M., Satake, A.,
Nadai, T., Umehara, H., Maeno, H., Wakabayashi, F., Nishio and Y. Fukamachi.
Deriving sea ice thickness and ice types in the Sea of Okhotsk using dual-freaquency
airborne SAR(Pi-SAR) data.
Annals of Glaciology, 34, 429-434, 2002.
Yamamoto, M., S. Watanabe, S. Tsunogai and M.
Wakatsuchi.
Effects of sea ice formation and diapycnal mixing on the Okhotsk Sea
Intermediate Water clarified with oxygen isotopes.
Deep-Sea Research, Ⅰ,49, 1165-1174, 2002.
Nakatsuka, T., C. Yoshikawa, M. Toda, K.
Kawamura and M. Wakatsuchi.
An extremely turbid intermediate water in the Sea of Okhotsk: Implication
for the transport of particulate organic matter in a seasonally ice-bound
sea.
Geophysical Research Letters, 29, 16,
10-13, 2002.
Sato, M., H. Narita and S.
Tsunogai
Barium increasing prior to opal during the last termination of glacial ages
in the Okhotsk Sea Sediments.
Journal of Oceanography, 58, 461-467, 2002.
Shimizu, D. and K. I. Ohshima.
Barotropic response of the Sea of Okhotsk to wind forcing.
Journal of Oceanography, 58, 851-860, 2002.
Ohshima, K.I., M. Wakatsuchi, Y. Fukamachi, and
G. Mizuta.
Near-surface circulation and tidal currents of the Okhotsk Sea observed with
the satellite-tracked drifters.
Journal of Geophysical Research, 107(C11), 3195-3210, 2002.
Seki, O., K. Kawamura, T. Nakatsuka, K.
Ohnishi, M. Ikehara and M. Wakatsuchi.
Sediment core profiles of long-chain n-alkanes in the Sea of Okhotsk:
Enhanced transport of terrestrial materials in the last deglaciation to the
early Holocene.
Geophysical Research Letters, 30, doi: 10.1029/2001GL014464,
2003.
Gladyshev, S., L. Talley, G.
Khen and M. Wakatsuchi.
Distribution, formation and seasonal variability of the Okhotsk Sea
Intermediate Water.
Journal of Geophysical Research, 108(C6), 3186, doi; 10,
1029/2001JC00087, 2003.
Fukamachi, Y., G. Mizuta, K.I. Ohshima, and
M. Wakatsuchi.
Variability of sea-ice draft off Hokkaido in the Sea of Okhotsk revealed by
a moored ice-profiling sonar in winter of 1999.
Geophysical Research Letters, 30, 1376, doi; 10,
1029/2002GL016197, 2003..
Itoh, M., K. I. Ohshima and M.
Wakatsuchi.
Distribution and formation of Okhotsk Sea Intermediate Water; an analysis of
isopycnal climatology data.
Journal of Geophysical Research, 108(C8), 3258, doi:
10.1029/2002JC001590, 2003.
Koizumi, I., K. Shiga and M. Ikehara.
Diatom records of the Holocene in the Okhotsk Sea.
Marine Micropaleontology, Vol.49, Issues 1-2, 1-184,
2003.
Ohshima, K. I., T. Watanabe
and S. Nihashi.
Surface heat budget of the Sea of Okhotsk during 1987-2001 and the role of
sea ice on it
Journal of Meteorological Society of Japan, vol.81, No.4,
683-677, 2003.
Mizuta G., Y. Fukamachi, K. I. Ohshima, and
M. Wakatsuchi.
Structure and seasonal variability of the East Sakhalin Current.
Journal of Physical Oceanography, Vol 33, No.11, 2430-2445,
2003.
Okazaki, Y., K. Takahashi, H. Yoshitani, T.
Nakatsuka, M. Ikehara and M. Wakatsuchi.
Radiolaria under the seasonally sea-ice covered conditions in the Okhotsk
Sea: flux and their implications for paleoceanography.
Marine Micropaleontol , 49(3), 195-230, 2003.
Okazaki, Y., K. Takahashi, T. Nakatsuka, and
M. C. Honda.
The production scheme of Cycladophora davisiana (Radiolaria) in the Okhotsk
Sea and the northwestern North Pacific: implication for the
paleoceanographic conditions during the glacials in the high latitude
oceans.
Geophys. Res. Lett., 30, 1939, 10.1029/2003GL18070, 2003.
Ohshima, K. I., D. Shimizu, M. Itoh, G.
Mizuta, Y. Fukamachi and M. Wakatsuchi.
Sverdrup balance and cyclonic gyre in the Sea of Okhotsk
Journal of Physical Oceanography, Vol. 34, 513-525, 2004.
Sakamoto, T., T. Tanabe, H. Shimizu, M.
Ikehara, N. Kimura, H. Narita, K. Aoki, T. Nakatsuka and M. Wakatsuchi.
Millennium scale sudden and abrupt sea-ice expansion events in the Sea of
Okhotsk based on analysis of ice rafted debris (IRD) in marine sediment
cores.
Paleoceanography. 2004. (in press)
Wakita, M., Y. W. Watanabe, S. Watanabe, S. Noriki and M. Wakatsuchi.
Oceanic uptake rate of anthropogenic CO2 in a subpolar marginal sea: The
Sea of Okhotsk.
Geophys. Res. Lett., Vol. 30, No. 24, 2252, doi:
10.1029/2003GL018057, 2003.
Mizuta, G., K. I. Ohshima, M. Itoh, Y.
Fukamachi and M. Wakatsuchi.
Winter mixed layer its yearly variability under sea ice in the southwestern
part of the Sea of Okhotsk.
Continental-Shelf Research, Vol. 24,
Seki, O., K. Kawamura, M. Ikehara, T.
Nakatsuka, H. Okada and T. Oba.
Variation of alkenone sea surface temperature in the Sea of Okhotsk over the
last Sea 85 kyrs.
Org.Geochemistry (Submitted)
Yoshikawa, C., Y. Yamanaka and T. Nakatsuka.
A study of seasonal variations in nitrogen isotope ratio of sinking
particles using a marine ecosystem model.
Deep Sea Research (Submitted)
Kimura, N. and M. Wakatsuchi.
Increase and decrease of sea ice area in the Sea of Okhotsk; Ice production
in coastal polynyas and dynamical thickening in convergence zones
Journal of Geophysical Research, 109, doi:
10.1029/2003JC001901, 2004.
Katsumata, K., K. I. Ohshima, T. Kono, M.
Itoh, I. Yasuda and M. Wakatsuchi.
Water exchange and tidal current through the Bussol Strait revealed by
direct current measurements.
Journal of Geophysical Research, 109, doi:
10.1029/2003JC001864, 2004.
Watanabe, T., M. Ikeda and M. Wakatsuchi.
Thermohaline effects of the seasonal sea ice cover in the Sea of Okhotsk.
Journal of Geophysical Research, 109, doi:
10.1029/2003JC001905, 2004.
Kawai, M., S. Watanabe, S. Tsunogai and M.
Wakatsuchi.
CFCs measurement in the Okhotsk Sea: where does diapycnal mixing occur and
how much intermediate water is produced?.
Journal of Geophysical Research (Submitted)
Fukamachi, Y., G. Mizuta, K. I. Ohshima, L.
D. Talley, S. C. Riser and M. Wakatsuchi.
Transport and its variability of Dense Shelf Water Revealed by long-term
moorings off Sakhalin in the Sea of Okhotsk.
Journal of Geophysical Research, 109, doi:
10.1029/2003JC001906, 2004.
Matsumoto, C., S. Saitoh, H. Takahashi, T.
Nakatsuka and M. Wakatsuchi.
Seasonal and interannual variability of chlorophyll a distributions in the Okhotsk Sea during 1998-2000 using multi-sensor remote sensing.
Journal of Geophysical Research (Submitted)
Toyota, T., T. Kawamura, K. I. Ohshima, H. Shimoda and M. Wakatsuchi.
Thickness distribution, texture and stratigraphy, and a simple probabilistic
model for dynamical thickening of sea ice in the southern Sea of Okhotsk.
Journal of Geophysical Research, 109,
C6, C06001, doi: 10.1029/2003JC002090, 2004.
Yoshida, O., H. Y. Inoue, S. Watanabe, S.
Noriki and M. Wakatsuchi.
Methane in the western part of the Sea of Okhotsk in 1998-2000.
Journal of Geophysical Research, 109, doi: 10.1029/2003JC1910,
2004.
Nakatsuka, T., M. Toda, K. Kawamura and M.
Wakatsuchi.
Dissolved and particulate organic carbon in the Sea of Okhotsk: their
transport from continental shelf to ocean interior.
Journal of Geophysical Research, doi: 10.1029/2003JC001909,
2004.
Nakatsuka, T., T. Fujimine, C. Yoshikawa, S.
Noriki, K. Kawamura, Y. Fukamachi, G. Mizuta and M. Wakatsuchi.
Biogenic and lithogenic particle fluxes in the western region of the Sea of
Okhotsk: implications for lateral material transport and biological
productivity.
Journal of Geophysical Research, doi: 10.1029/2003JC001908,
2004.
Yamamoto, K. M., S. Watanabe, S. Tsunogai and
M. Wakatsuchi.
Chlorofluorocarbons in the Sea of Okhotsk: ventilation of intermediate
water.
Journal of Geophysical Research, 109, doi: 10.1029/2003JC1919,
2004.
Ohshima, K. I., Y. Fukamachi, T. Mutoh, and
M. Wakatsuchi.
A generation mechanism for mesoscale eddies in the Kuril Basin of the
Okhotsk Sea: baroclinic instability caused by the enhanced tidal mixing.
Journal of Oceanography. (in
press)