Dr. Naoto Ebuchi, Professor



Institute of Low Temperature Science
Hokkaido University
N19 W8, Kita-ku, Sapporo 060-0819, Japan
Phone: +81-11-706-5470
Fax: +81-11-706-7142
Email: ebuchi "a" lowtem.hokudai.ac.jp


Research Interests:

  • Active microwave remote sensing of the ocean surface
  • Observation of marine surface winds by spaceborne microwave radiometers and scatterometers
  • Observation of sea surface salinity using spaceborne microwave radiometers
  • Seasonal and interannual variations of the surface circulations in the Sea of Okhotsk
  • HF radar observations of the Soya Warm Current
  • Remote sensing of sea ice



  • Fang, X., Y. Isoda, I. Kudo, T. Aramaki, K. Imai, and N. Ebuchi, 2020: Behavior of water mass beneath the Tsushima Warm Current. Water, 12(8): 2184, doi:10.3390/w12082184.
  • Zhang, W., N. Ebuchi, Y. Fukamachi, F. Cheng, K. I. Ohshima, B. Emery, T. Toyota, H. Abe, and K. Shirasawa, 2020: Sea ice observation with ocean HF radar. IEEE Trans. Geosci. Remote Sens., 58(1), 378-390, doi: 10.1109/TGRS.2019.2936576.
  • Roarty H., T. Cook, L. Hazard, D. George, J. Harlan, S. Cosoli, L. Wyatt, E. Alvarez Fanjul, E. Terrill, M. Otero, J. Largier, S. Glenn, N. Ebuchi, B. Whitehouse, K. Bartlett, J. Mader, A. Rubio, L. Corgnati, C. Mantovani, A. Griffa, E. Reyes, P. Lorente, X. Flores-Vidal, K. J. Saavedra-Matta, P. Rogowski, S. Prukpitikul, S.-H. Lee, J.-W. Lai, C.-A. Guerin, J. Sanchez, B. Hansen, and S. Grilli, 2019: The Global High Frequency Radar Network. Front. Mar. Sci., 6:164. doi: 10.3389/fmars. 2019.00164.
  • Abe, H., N. Ebuchi, H. Ueno, H. Ishiyama, and Y. Matsumura, 2019: Aquarius reveals eddy stirring after a heavy precipitation event in the subtropical North Pacific. J. Oceanogr., 75(1), 37-50, doi: 10.1007/s10872-018-0482-0.
  • Ebuchi, N., 2017: Evaluation of marine surface wind speed observed by AMSR2 on GCOM-W. IEEE J. Sel. Topics Appl. Earth Observ. Remote Sens., 10(9), 3955-3962, doi: 10.1109/JSTARS.2017.2685432.
  • Ohshima, K. I., D. Simizu, N. Ebuchi, S. Morishima, and H. Kashiwase, 2017: Volume, heat, and salt transports through the Soya Strait and their seasonal and interannual variations. J. Phys. Oceanogr., 47(5), 999-1019, doi: 10.1175/JPO-D-16-0210.1.
  • Abe, H., Y. Tanimoto, T. Hasegawa, and N. Ebuchi, 2016: Simultaneous formation of the oceanic Rossby waves in the eastern North and South Pacific during the ENSO events. J. Phys. Oceanogr., 46(11), 3397-3414, doi: 10.1175/JPO-D-15-0118.1.
  • Zhang, W., N. Ebuchi, Y. Fukamachi, and Y. Yoshikawa, 2016: Estimation of wind drift current in the Soya Strait. J. Oceanogr., 72(2), 299-311, doi: 10.1007/s10872-015-0333-1.
  • Toyoda, T., Y. Fujii, T. Kuragano, J. P. Matthews, H. Abe, and N. Ebuchi, N. Usui, K. Ogawa, and M. Kamachi, 2015: Improvements to a global ocean data assimilation system through the incorporation of Aquarius surface salinity data. Q. J. R. Meteorol. Soc., 141, 2750-2759, doi: 10.1002/qj.2561.
  • Abe, H., and N. Ebuchi, 2014: Evaluation of sea surface salinity observed by Aquarius. J. Geophys. Res., 119 (C11), 8109-8121, doi: 10.1002/2014JC010094.
  • Kuma, K., R. Sasayama, N. Hioki, Y. Morita, Y. Isoda, T. Hirawake, K. Imai, T. Aramaki, T. Nakamura, J. Nishioka, and N. Ebuchi, 2014: Chemical evidence for the origin of the Cold Water Belt along the northeastern coast of Hokkaido. J. Oceanogr., 70(4), 377-387, doi: 10.1007s10872-014-0239-3.
  • Abe, H., Y. Tanimoto, T. Hasegawa, N. Ebuchi, and K. Hanawa, 2014: Oceanic Rossby waves induced by the meridional shift of the ITCZ in association with the ENSO events. J. Oceanogr., 70(2), 165-174, doi: 10.1007/s10872-014-0220-1.
  • Nishioka, J., T. Nakatsuka, Y. W. Watanabe, I. Yasuda, K. Kuma, H. Ogawa, N. Ebuchi, A. Scherbinin, Yu. N. Volkov, T. Shiraiwa, and M. Wakatsuchi, 2013: Intensive mixing along an Island chain controls oceanic biogeochemical cycles. Global Biogeochem. Cycles, 27(3), 920-929, doi: 10.1002/gbc.20088.
  • Ono, J., K. I. Ohshima, K. Uchimoto, N. Ebuchi, H. Mitsudera, and H. Yamaguchi, 2013: Particle-tracking simulation for the drift/diffusion of spilled oil in the Sea of Okhotsk with a three-dimensional/high-resolution model. J. Ocenoagr., 69(4), 413-428, doi: 10.1007/s10872-013-0182-8.
  • Shirasawa, K., N. Ebuchi, M. Lepparanta, and T. Takatsuka, 2013: Ice-edge detection from Japanese C-band radar and high-frequency radar coastal stations. Ann. Glaciol., 54(62), 59-64, doi: 10.3189/2013AoG62A007.
  • Abe, H., K. Hanawa, and N. Ebuchi, 2013: Interannual variations in the Hawaiian Lee Countercurrent. J. Oceanogr., 69(2), 191-202, doi: 10.1007/s10872-012-0166-0.
  • Ebuchi, N., 2012: Self-consistency of marine surface wind vectors observed by ASCAT. IEEE Trans. Geosci. Remote Sens., 50(7), 2473-2480, doi: 10.1109/ TGRS.2011.2160648.
  • Katsaros, K. B., A. Bentamy, M. Bourassa, N. Ebuchi, J. Gower, W. T. Liu, and S. Vignudelli, 2011: Climate data issues from an oceanographic remote sensing perspective. In “Remote Sensing of the Changing Ocean,” ed. by D. L. Tang, Springer, 7-32.
  • Nihashi, S., N. Ebuchi, Y. Fukamachi, and S. Takahashi, 2011: Characteristics of sea ice in the Okhotsk coastal polynyas revealed from satellites, ice-profiling sonar, and digital camera observations. Ann. Glaciol., 52(57), 133-139, doi:10.3189/172756411795931624.
  • Fukamachi, Y., K.I. Ohshima, N. Ebuchi, T. Bando, K. Ono, and M. Sano, 2010: Volume transport in the Soya Strait during 2006-2008. J. Oceanogr., 66(5), 685-696, doi: 10.1007/s10872-008-0031-3.
  • Matsuda, J., H. Mitsudera, T. Nakamura, K. Uchimoto, T. Nakanowatari, and N. Ebuchi, 2009: Wind and buoyancy driven intermediate-layer overturning in the Sea of Okhotsk. Deep-Sea Res. I, 56, 1401-1418, doi:10.1016/j.dsr.2009.04.014.
  • Toyota, T., K. Nakamura, S. Uto, K. I. Ohshima, N. Ebuchi, 2009: Retrieval of sea ice thickness distribution in the seasonal ice zone from air-borne L-band SAR. Int’nl J. Remote Sens., 30(11-12), 3171-3189, doi: 10.1080/01431160802558790.
  • Ebuchi, N., 2009: Evaluation of wind speed observed by AMSR using data from ocean buoys and SeaWinds. J. Remote Sens. Soc. Jpn., 29(1), 174-178, doi: 10.11440/rssj.29.174.
  • Ebuchi, N., Y. Fukamachi, K. I. Ohshima, and M. Wakatsuchi, 2009: Subinertial and seasonal and variations in the Soya Warm Current revealed by HF radars, coastal tide gauges, and bottom-mounted ADCP. J. Oceanogr., 65(1), 31-43, doi: 10.1007/s10872-009-0003-2.
  • Fukamachi, Y., I. Tanaka, K. I. Ohshima, N. Ebuchi, G. Mizuta, H. Yoshida, and M. Wakatsuchi, 2008: Volume transport of the Soya Warm Current revealed by bottom-mounted ADCP and ocean-radar measurement. J. Oceanogr., 64(3), 385-392, doi: 10.1007/s10872-008-0031-3.
  • Uchimoto, K., H. Mitsudera, N. Ebuchi, and Y. Miyazawa, 2007: Clockwise eddy caused by the Soya Warm Current in an OGCM. J. Oceanogr., 63(3), 379-391, doi: 10.1007/s10872-007-0036-3.
  • Konda, M., A. Shibata, N. Ebuchi, and K. Arai, 2006: An evaluation of the effect of the relative wind direction on the measurement of the wind and the instantaneous latent heat flux by Advanced Microwave Scanning Radiometer. J. Oceanogr., 62(3), 395-404, doi: 10.1007/s10872-006-0063-5.
  • Ebuchi, N., 2006: Evaluation of marine surface winds observed by SeaWinds and AMSR on ADEOS-II. J. Oceanogr., 62(3), 293-301, doi: 10.1007/s10872-006-0054-6.
  • Ebuchi, N., 2006: Seasonal and interannual variations in the East Sakhalin Current revealed by the TOPEX/POSEIDON altimeter data. J. Oceanogr., 62(2), 171-183, doi: 10.1007/s10872-006-0042-x.
  • Ebuchi, N., Y. Fukamachi, K. I. Ohshima, K. Shirasawa, M. Ishikawa, T. Takatsuka, T. Daibo, and M. Wakatsuchi, 2006: Observation of the Soya Warm Current using HF ocean radar. J. Oceanogr., 62(1), 47-61, doi: 10.1007/s10872-006-0031-0.
  • Suzuki, N., N. Ebuchi, C. Zhao, Y. Sugimori, T. Osawa, and T. Moriyama, 2004: Study for estimation of air-sea CO2 gas transfer by wave breaking model using satellite data -Estimation of the friction velocity considering wave effect-, Intnl J. Remote Sens. Earth Sci., 1, 50-57.
  • Ebuchi, N., and K. Hanawa, 2003: Influences of mesoscale eddies on variations of the Kuroshio axis. J. Oceanogr., 59(1), 25-36, doi: 10.1023/A:1022856122033.
  • Ebuchi, N., H. C. Graber, and M. J. Caruso, 2002: Evaluation of wind vectors observed by QuikSCAT/SeaWinds using ocean buoy data. J. Atmos. Oceanic Tech., 19(12), 2049-2062, doi: 10.1175/1520-0426(2002).
  • Suzuki, N., N. Ebuchi, I. Watabe, and Y. Sugimori, 2002: Study of the relationship between non-dimensional roughness length and wave age, effected by wave directionality. Proc. Indian Acad. Sci. (Earth Planet. Sci) , 111(3), 305-313.
  • Ebuchi, N., and S. Kizu, 2002: Probability distribution of surface wave slope derived using sun glitter images from Geostationary Meteorological Satellite and surface vector winds from scatterometers. J. Oceanogr., 58(3), 477-486, doi: 10.1023/A:1021213331788.
  • Toba, Y., S. D. Smith, and N. Ebuchi, 2001: Chapter 2. Historical drag expressions. In “Wind Stress over the Ocean,” eds. I.S.F. Jones and Y. Toba, Cambridge Univ. Press, 35-53
  • Ebuchi, N., and K. Hanawa, 2001: Trajectory of mesoscale eddies in the Kuroshio recirculation region. J. Oceanogr., 57(4), 471-480, doi: 10.1023/A:1021293822277.
  • Masuko, H., K. Arai, N. Ebuchi, M. Konda, M. Kubota, K. Kutsuwada, T. Manabe, A. Mukaida, T. Nakazawa, A. Nomura, A. Shibata, and Y. Tahara, 2000: Evaluation of vector winds observed by NSCAT in the seas around Japan. J. Oceanogr., 56(5), 495-505, doi: 10.1023/A:1011192725800.
  • Ebuchi, N., 2000: Evaluation of NSCAT-2 wind vectors by using statistical distribution of wind speeds and directions. J. Oceanogr., 56(2), 161-172, doi: 10.1023/A:1011183029009.
  • Ebuchi, N., and K. Hanawa, 2000: Mesoscale eddies observed by TOLEX­ADCP and TOPEX/POSEIDON altimeter in the Kuroshio Recirculation Region south of Japan. J. Oceanogr., 56(1), 43-57, doi: 10.1023/A:1011110507628.
  • Ebuchi, N., 1999: Relationship between directional distribution of scatterometer-derived winds and errors in geophysical model functions. J. Adv. Mar. Sci. Tech. Soc., 5(1&2), 19-30, doi: 10.14928/amstec.5.0_19_30.
  • Ebuchi, N., 1999: Growth of wind waves with fetch in the Sea of Japan under winter monsoon investigated using data from satellite altimeters and scatterometer. J. Oceanogr., 55(5), 575-584, doi: 10.1023/A:1007836701387.
  • Ebuchi, N., 1999: Statistical distribution of wind speeds and directions observed by ADEOS/NSCAT. J. Geophys. Res., 104(C5), 11,393-11,403, doi: 10.1029/98JC02061.
  • Suzuki, N., N. Ebuchi, J. Suwa, and Y. Sugimori, 1998: Relationship between non­-dimensional roughness length and wave age investigated using tower-based measurements. J. Adv. Mar. Sci. Tech. Soc., 4(2), 217-224, doi: 10.14928/amstec.4.2_217.
  • Ebuchi, N., and H. C. Graber, 1998: Directivity of wind vectors derived from the ERS-1/AMI Scatterometer. J. Geophys. Res., 103(C5), 7787-7797, doi: 10.1029/97JC02727.
  • Ebuchi, N., 1997: Statistical distribution of wind speeds and directions contained in the Preliminary NSCAT Science Data Products. J. Adv. Mar. Sci. Tech. Soc., 3(2), 141-156, doi: 10.14928/amstec.3.2_141.
  • Ebuchi, N., 1997: Sea surface temperature dependence of C-­band radar cross sections observed by ERS-1/AMI scatterometer. J. Adv. Mar. Sci. Tech. Soc., 3(2), 157-168, doi: 10.14928/amstec.3.2_157.
  • Ishizaka, J., I. Asanuma, N. Ebuchi, H. Fukushima, H. Kawamura, K. Kawasaki, M. Kishino, M. Kubota, H. Masuko, S. Matsumura, S. Saitoh, Y. Senga, M. Shimanuki, N. Tomii, and M. Utashima, 1997: Time series of physical and optical parameters off Shimane, Japan, during fall of 1993: First observation by moored optical buoy system for ADEOS data verification. J. Oceanogr., 53(3), 245-258.
  • Toba, Y., I. S. F. Jones, N. Ebuchi, and H. Kawamura, 1996: The role of gustiness in determining the aerodynamic roughness of the sea surface. In "The Air-Sea Interface," eds. M.A. Donelan, W.H. Hui and W.J. Plant, RSMAS, University of Miami, Miami, 407-412.
  • Ebuchi, N., and K. Hanawa, 1996: Comparison of sea surface heights observed by TOPEX altimeter with sea level data at Chichijima. J. Oceanogr., 52(3), 259-273, doi: 10.1007/BF02235923.
  • Ebuchi, N., and K. Hanawa, 1995: Comparison of surface current variations observed by TOPEX altimeter with TOLEX-ADCP data. J. Oceanogr., 51(3), 351-362, doi: 10.1007/BF02285171.
  • Kawamura, H., S. Kizu, F. Sakaida, N. Ebuchi, and Y. Toba, 1994: Study on air-sea interactions in the OMLET (Ocean Mixed Layer ExperimenT) area using satellite remote sensing. In "Remote Sensing of the Oceans," eds. I.S.F. Jones, Y. Sugimori and R.W. Stewart, Seibutsu Kenkyusha, Tokyo, 263-270.
  • Ebuchi, N., and H. Kawamura, 1994: Validation of wind speeds and significant wave heights observed by TOPEX altimeter around Japan. J. Oceanogr., 50(4), 479-487, doi: 10.1007/BF02234969.
  • Kawamura, H., S. Kizu, F. Sakaida, and N. Ebuchi, 1993: Validation results of the satellite-derived parameters for the oceanography in the north Western Pacific Ocean. In "Environment '93, Symposium on Remote Sensing in Environmental Research and Global Change," eds. M. Fung and A. Liu, The Hong Kong Univ. of Sci. & Tech., 232-244.
  • Ebuchi, N., H. Kawamura, and Y. Toba, 1993: Bursting phenomena in the turbulent boundary layer beneath the laboratory wind-wave surface. In "Natural Physical Sources of Underwater Sound," ed. B. Kerman, Kluwer Acad. Pub., 263-276.
  • Ebuchi, N., H. Kawamura, and Y. Toba, 1993: Physical processes of microwave backscattering from laboratory wind-wave surfaces. J. Geophys. Res., 98(C8), 14,669-14,681, doi: 10.1029/93JC00974.
  • Toba, Y., H. Kawamura, and N. Ebuchi, 1992: Strong coupling of wind and wind waves. In "Breaking Waves," eds. M.L. Banner and R.H.J. Grimshaw, Springer-Verlag, 165-171.
  • Ebuchi, N., H. Kawamura, and Y. Toba, 1992: Microwave backscattering from laboratory wind-wave surfaces and its relation to wave breaking with bubble entrainment. In "Breaking Waves," eds. M.L. Banner and R.H.J. Grimshaw, Springer-Verlag, 103-108.
  • Ebuchi, N., H. Kawamura, and Y. Toba, 1992: Statistical properties of microwave backscattering from laboratory wind-wave surfaces. J. Oceanogr., 48(2), 139-154, doi: 10.1007/BF02239002.
  • Ebuchi, N., Y. Toba, and H. Kawamura, 1992: Statistical study on the local equilibrium between wind and wind waves by using data from ocean data buoy stations. J. Oceanogr., 48(1), 77-92, doi: 10.1007/BF02234033.
  • Ebuchi, N., H. Kawamura, and Y. Toba, 1992: Growth of wind waves with fetch observed by the GEOSAT altimeter in the Japan Sea under winter monsoon. J. Geophys. Res., 97(C1), 809-819, doi: 10.1029/91JC02452.
  • Toba, Y., and N. Ebuchi, 1991: Sea-surface roughness length fluctuating in concert with wind and waves. J. Oceanogr. Soc. Japan, 47(3), 63-79, doi: 10.1007/BF02301483.
  • Ebuchi, N., Y. Toba, and H. Kawamura, 1990: On the wave dependence of sea-surface wind stress. J. Oceanogr. Soc. Japan, 46(4), 177-183, doi: 10.1007/BF02125578.
  • Toba, Y., N. Iida, H. Kawamura, N. Ebuchi, and I. S. F. Jones, 1990: Wave dependence of sea-surface wind stress. J. Phys. Oceanogr., 20(5), 705-721, doi: 10.1175/1520-0485(1990)020.
  • Ebuchi, N., H. Kawamura, and Y. Toba, 1987: Fine structure of laboratory wind-wave surfaces studied using an optical method. Boundary-Layer Meteorol., 39(1), 133-151, doi: 10.1007/BF00121871.


Research Group