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北海道オホーツク海沿岸部における海氷の底面形状とその分析
ANALYSIS OF UNDERSIDE PROFILE OF SEA ICE ON OKHOTSK SEA COAST OF HOKKAIDO

Yasuji Yamamoto, Shinji KIOKA, Daisuke HONMA, Mitsuhiro SAKIKAWA, Shigeki Sakai
2003 PROCEEDINGS OF CIVIL ENGINEERING IN THE OCEAN  
Sea ice surveys are conducted along the Okhotsk Sea coast of Hokkaido, Japan using a bottommounted IPS and ADCP. This paper reports on the analysis of a 180km long "ice draft profile" or "underside profile" of deformed pack ice moving past the mooring site in 2001 . The underside profile was not flat and had very large undulations, and the maximum draft during the observation period was 3.6 m. Although the underside profile as a wave profile has non-stationary characteristics as results of
more » ... as results of Discrete Wavelet Analysis and application of Locally Stationary AR Model, the normalized power spectrums of the profile in locally stationary span were roughly the same and the mean wavelength was approximately 62 m. In addition, simulation methods for deformed sea ice draft depth and plane unevenness of sea ice bottom using the power spectrum from one-point measurement data as in this measurement are also discussed.
doi:10.2208/prooe.19.803 fatcat:2yduyiyffbc6jcr2coox3uon6u