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OCEAN STRUCTURE AND OCEAN HEAT FLUX UNDER FAST ICE IN LUTZOW-HOLM BAY,ANTARCTICA

南极卢措霍姆湾固冰下的海洋结构和海洋热通量

基本信息

批准号：
04640406
负责人：
KAWAMURA Toshiyuki
金额：
$ 1.09万
依托单位：
HOKKAIDO UNIVERSITY,INSTITUTE OF LOW TEMPERATURE SCIENCE
依托单位国家：
日本
项目类别：
Grant-in-Aid for General Scientific Research (C)
财政年份：
1992
资助国家：
日本
起止时间：
1992 至 1994
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-04640406/
关键词：
POLAR OCEANOGRAPHY AIR-SEA INTERACTION OCEAN STRUCTURE OCEAN HEAT FLUX SEA ICE SUPERIMPOSED ICE MICROWAVE RADIOMETER SURFACE MELTING 極地海洋海洋構造

项目摘要

Accurate valuations of atmosphere-ocean interactions in the polar regions are essential for a right understanding of the climate variation. Although the collection of the observed data are strongly requested in wider area and longer period, field observations in the polar regions are restricted both spatially and seasonally. The Antarctic Climate Research Program was planned to evaluate the air-sea interactions by the Japanese Antarctic Research Expedition. Intensive studies were conducted between 1990 and 1992 in Lutzow-Holm Bay where the Syowa Station is located. The following results are obtained on ocean and sea-ice studies in the bay :(1) In the Antarctic coastal ocean, the thickness of the Winter Water becomes maximum in fall and minimum in summer.(2) It is proposed that the above seasonal variation is caused by the variation of Ekman convergence.(3) Flows under land-fast ice strongly depend on the location of the fast ice margin.(4) Snow depth and sea-ice thickness in the bay increases with distance from the continent.(5) Fast ice is controlled by extraordinary growth process : The sea ice shows little increase even in winter. However, in summer, an extreme upward growth was observed, to which snow cover contributes.(6) Microwave rediometer is useful to detect melting at the surface of snow/ice.(7) Microwave data reveal that sea ice distribution off the bay converges in summer.(8) Satellite images show that the polynya "Ohtone Suiro" is located on the extension of areas with low ice concentration from Cosmonant Polynya.

准确评估极地地区大气-海洋相互作用对于正确理解气候变化至关重要。尽管对观测资料的收集提出了更大范围、更长周期的要求，但极地的野外观测在空间和季节上都受到限制。南极气候研究方案计划由日本南极研究考察队评估海气相互作用。1990年至1992年期间，在Syowa站所在的Lutzow-Holm湾进行了深入研究。通过对该湾海洋和海冰的研究，得到以下结果：（1）在南极沿岸海域，冬季海水厚度秋季最大，夏季最小; (2)我们认为这种季节变化是由Ekman辐合的变化引起的。(3)陆固冰下的流动强烈地依赖于固冰边缘的位置。(4)海湾的积雪深度和海冰厚度随着与大陆的距离而增加。(5)快冰是由异常的生长过程控制的：即使在冬季，海冰也几乎没有增加。然而，在夏季，观察到一个极端的向上增长，积雪有助于。(6)微波辐射计可用于探测雪/冰表面的融化。(7)微波资料显示，夏季海湾外海冰分布趋于集中。(8)卫星图像显示，冰穴“Ohtone Suiro”位于Cosmonant Polynya低冰浓度区域的延伸部分。