ANALYSIS OF ICE BOTTOM TOPOGRAPHY ON OKHOTSK SEA COAST OF HOKKAIDO- OBSERVATION RESULTS IN 2004-

• Main Author: Shinji Kioka Yasuji Yamamoto
• Other Authors: The Pennsylvania State University CiteSeerX Archives
• Format: Text
• Language: English
• Subjects: IPS; ADCP; sea ice; draft; bottom topography; spectrum; Okhotsk; okhotsk sea; Sea ice
• Online Access: http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.505.1303; http://web2.clarkson.edu/projects/iahrice/IAHR 2006/contents/39_s125.pdf

We have conducted sea ice surveys using Ice Profiling Sonar (IPS) and Acoustic Doppler Current Profiler (ADCP). This paper reports on the quantitative analysis results on the sea ice data, especially on ice bottom topography, obtained in 2004. and the renewed knowledge obtained by comparing the data with past results. From results of analysis of the sea ice bottom topography (draft profile) with non-stationary characteristics by the locally stationary AR model, we were able to make the assumption that although the average power (variance of draft depth) of each subinterval (span) considered locally stationary was different, the normalized spectra of the subintervals were identical, which indicated similar results as the previous data. We were able to obtain an important conclusion that the typical normalized spectrum of ice bottom topography (underside profile) might be common regardless of annual variations in ice draft.