PRELIMINARY RESULTS OF HYDROGRAPHY UNDER FAST ICE IN LUTZOW-HOLM BAY, ANTARCTICA IN 1990
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概要
- 論文の詳細を見る
Seasonal variations in water structure under fast ice in Lutzow-Holm Bay, Antarctica, were observed from April to December, 1990. Two warm and oxygen-poor waters were observed. One is warmer water with temperatures higher than 0℃, salinities of more than 34.6 and oxygen less than 6 ml/l, and is found in the bottom layer deeper than 700m in the Shirase Submarine Valley. The other is found in the upper layer with temperatures of -1.4∿ -1.5℃, salinities of around 34.2 and oxygen of 6.3-6.9ml/l. The origin of both waters is a blob of the Circumpolar Deep Water (CDW) drawn from offshore, and they are admixtures of CDW with overlying Winter Water in various proportions. Due to high density, the former is confined to the bottom layers of deep troughs; on the contrary, the latter with low density can migrate in the upper layer with the water circulation in the bay. In spring a cold and oxygen-rich water (T<-1.6℃, O_2>7.2ml/l) was observed at the intermediate depth of about 250m-350m near the top of the downslope of the submarine valley. It is probable that this water was formed by sea ice processes during winter.
- 国立極地研究所の論文
著者
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Kawaguchi Sadao
Nagaoka National College Of Technology
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Ushio Shuki
National Institute Of Polar Research
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Shimohara Kimiko
Kitami Institute of Technology
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ONO Nobuo
National Institute of Polar Research
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KAWAGUCHI Sadao
National Institute of Polar Research
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Takizawa Takatoshi
Japan Marine Science and Technology Center
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TAKIZAWA Takatoshi
Institute of Low Temperature Science, Hokkaido University
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KAWAMURA Toshiyuki
Institute of Low Temperature Science, Hokkaido University
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OHSHIMA Kay
Institute of Low Temperature Science, Hokkaido University
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Kawamura Toshiyuki
Institute Of Low Temperature Science Hokkaido University
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Kanamori Satoru
Institute For Hydrospheric And Atmospheric Sciences Nagoya University
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Ohshima K
Hokkaido Univ. Sapporo Jpn
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Ohshima Kay
The Institute Of Low Temperature Science Hokkaido University
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Ohshima Kay
Hokkaido Univ. Sapporo Jpn
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Ohshima Kay
Institute Of Low Temperature Science Hokkaido University
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Kanamori Satoru
National Institute of Polar Research
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Ohshima Kay
Institute Of Llow Temperature Science Hokkaido University
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Satow Kazuhide
Nagoya Technical College
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Ono N
National Institute Of Polar Research
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Shinbori K
Hokkaido Univ. Sapporo
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