Author(s): Nobuyoshi Ishikawa; Yuji Kodama; Toshiyuki Kawamura; Kunio Shirasawa
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Keywords: No Keywords
Abstract: Long-term meteorological observations have been carried out around the Saroma-ko Lagoon on the northeastern coast of Hokkaido for describing the local climate before and after sea ice formation. During early winter the northerly wind was warmer than the other directions, which was due to the higher water temperature of the ice-free Okhotsk Sea as compared to the inland surface temperature. A surface temperature inversion was frequently observed after sea ice formation and in the late spring, which was explained by the radiation cooling in the sea ice season, and cold water deposit in the late spring. The climatic sensitivity was introduced for evaluating the influence of sea ice on the climate and high sensitivity was obtained during sea ice season. For eliminating the advection effect, the difference of the temperature lapse rate before and after high sea ice coverage was analyzed and the effect of sea ice was found to be dominant to the daily minimum temperature.
Year: 2004