Satellite passive microwave studies of the Sea of Okhotsk ice cover and its relation to oceanic processes, 1978-1982
Satellite passive microwave studies of the Sea of Okhotsk ice cover and its relation to oceanic processes, 1978-1982
复制标题
1978-1982 年鄂霍次克海冰盖及其与海洋过程关系的卫星无源微波研究
DOI：
10.1029/jc092ic12p13013
复制
发表时间：
1987
影响因子：
--
通讯作者：
Seelye Martin
中科院分区：
文献类型：
--
作者：
M. Alfultis;Seelye Martin
本文介绍了利用 Nimbus 7 扫描多通道微波辐射计 (SMMR) 卫星数据来研究 1978 年至 1982 年四个冬季鄂霍次克海的冰盖。从 SMMR 获得的冰浓度估计值用于研究两个不同的冰间湖：一个位于卡什瓦罗瓦浅滩，另一个位于西北大陆架。对于卡什瓦罗瓦冰间湖，这项研究表明，冰间湖直接发生在河岸上方，这可能与历史性夏季巡航中观察到的上升流有关。对于大陆架来说，由于近海强风和寒冷的气温，冰间湖区域是一个高产冰区，冰间湖区域与气象站数据的热通量估计相结合，可以得出冰、盐和稠密的陆架水的生产率。 Kitani（1973）之前的一项研究表明，这种稠密的陆架水与太平洋水的混合产生了鄂霍茨克河特有的水团，这是150至800 m深度之间的寒冷、低盐度的中间水层。根据我们的计算，我们估计稠密陆架水的年产量约为 0.5 Sv，中间水的年产量为 1-2 Sv，这意味着该层的更新时间为 10-40 年。
This paper describes the use of the Nimbus 7 Scanning Multichannel Microwave Radiometer (SMMR) satellite data to study the ice cover in the Sea of Okhotsk during the four winters of 1978–1982. The ice concentration estimates obtained from SMMR are used to study two different polynyas: one over the Kashevarova Bank, and the other over the northwest continental shelf. For the Kashevarova polynya this study shows that the polynya, which may be related to the upwelling observed in historic summer cruises, occurs directly over the bank. For the continental shelf, which because of strong offshore winds and cold temperatures is a region of high ice production, the polynya areas are combined with heat flux estimates from weather station data to yield the production rates of ice, salt, and dense shelf water. As a previous study by Kitani (1973) shows, the mixing of this dense shelf water with Pacific water yields a water mass unique to the Okhotsk, which is the layer of cold, low-salinity intermediate water between depths of 150 and 800 m. From our calculations, we estimate that the dense shelf water is produced at an annual rate of about 0.5 Sv, and that the intermediate water is produced at a rate of 1–2 Sv, which yields a renewal time for this layer of 10–40 years.