A study on mechanisms for the formation of polynyas in the Antarctic

南极冰间湖形成机制研究

• 批准号: 07454107
• 负责人: WAKATSUCHI Masaaki
• 金额: $ 4.99万
• 依托单位: HOKKAIDO UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 1995
• 资助国家: 日本
• 起止时间: 1995 至 1997
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-07454107/
• 关键词: Polynya; Antarctic; sea ice; air-sea interaction; Antarctic Bottom Water; remote sensing; bring rejection; thermohaline circulation; ポリニヤ; 海氷域変動; 海洋渦; 南極発散域; 湧昇; 大気-海洋-海水相互作用; 南大洋; 海氷域; 係留観測; 気候

Polynyas are the areas of open water which often occurs within the Antarctic sea ice cover. The major purpose of this study is to provide fundamental informations of actual behaviors which occur in the polynyas, and of its role in the polar regions.To investigate the polynyas, we adopted two regions, around Syowa Station and off Adelie Land as study areas. The results of our investigations are as follows ;(1) There are two types of formation and maintenance for coastal polynyas. One is produced and maintained by strong, local winds and the existence of fast ice in a region east of the polynya. The formation and maintenance of the other polynya are controlled by synoptic scale weather.(2) the coastal polynya just off Adelie Land, Antarctic plays an important role on the formation of part of Antarctic Bottom Water, through the active production of sea ice there in winter.

波利尼亚是经常出现在南极海冰覆盖范围内的开阔水域。这项研究的主要目的是提供多尼雅的实际行为及其在极地地区的作用的基本信息。为了调查多尼雅，我们选择了锡奥瓦站周围和阿德利岛外的两个地区作为研究区域。研究结果如下：(1)滨海多尼雅的形成和维持有两种类型。一种是由当地的强风和波尼亚以东地区快速冰的存在产生和维持的。其他波尼亚的形成和维持受天气尺度天气的控制。(2)南极阿德利近海的波尼亚通过在冬季活跃地产生海冰，对部分南极底层水的形成起着重要作用。

项目成果

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