Step-like structure in temperature and salinity profiles,observed near icebergs trapped by fast ice,Antarctica |
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| Authors: | Kay I Ohshima Toshiyuki Kawamura Takatoshi Takizawa Shuki Ushio |
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| Institution: | (1) The Institute of Low Temperature Science, Hokkaido University, Kita-ku, 060 Sapporo, Japan;(2) Japan Marine Science and Technology Center, Natsushima-cho, 237 Yokosuka, Japan;(3) National Institute of Polar Research, 9-10, Kaga 1-chome, Itabashi-ku, 173 Tokyo, Japan |
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| Abstract: | Step-like thermohaline structure was observed near icebergs trapped by fast ice in Lützow-Holm Bay, Antarctica. The structure was developed within the draft depth of the icebergs. The typical vertical distance between the succeeding step surfaces is 20–30 m, and the temperature and salinity differences across the step surface are about 0.05–0.06 deg and 0.06–0.10 psu, respectively. The structure appears to be generated by a sea-water/iceberg interaction, and is explainable by a simple model in which an ice wall is placed in the ocean linearly stratified by vertical salinity gradient. |
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