| Sea ice surveys are conducted along the Okhotsk Sea coast of Hokkaido、 Japan using a bottom-mounted IPS and ADCP. This paper reports on the analysis of a 180km long "ice draft profile" of deformed pack ice moving past the mooring site in 2001. The occurrence rate of drafts 2 m or deeper was 4 % and that of 3 m or deeper was 0.1 %. The maximum draft during the observation period was 3.6 m. Although the ice draft profile as a wave profile has non-stationary characteristics、 the normalized power spectrums of the profile in locally stationary span were roughly the same and the peak wavelength was approximately 100 m. In addition、 simulation methods for deformed sea ice draft depth and plane unevenness of sea ice bottom by using one-point measurement data as in this measurement are also discussed. |
