Hydrographic observations from the Weddell Sea during the Norwegian Antarctic Research Expedition 1976/77
Hydrographic observations from the Weddell Sea during the Norwegian Antarctic Research Expedition 1976/77
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1976/77 年挪威南极考察期间威德尔海的水文观测
DOI：
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发表时间：
1985
期刊：
影响因子：
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通讯作者：
T. Tørresen
中科院分区：
文献类型：
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作者：
A. Foldvik;T. Gammelsrød;T. Tørresen
1977年威德尔海南部的CTD观测表明，源自漂浮的Filchner冰架下的冰架水在Filchner凹陷的岩床处溢流，并可在大陆坡2000米以上的深度处识别。威德尔深水对陆架的侵入在密集陆架水外流区尤其明显，可能是由外流驱动的。威德尔深水中心温度异常偏低可能与威德尔波林尼亚冬季对流有关。1976年冬季冰穴区外围的异常CTD站表明，戈登（Gordon）（1978）报告的深对流现象可能相当常见。观测结果表明，双扩散对流对威德尔海中部的垂直热输送是重要的。
CTD observations from the southern Weddell Sea in 1977 show that Ice Shelf Water originating under the floating Filchner Ice Shelf overtlows at the sill of the Filchner Depression and can be identified on the continental slope at more than 2000m depth. Intrusions of Weddell Deep Water upon the shelf are especially noticeable in the region of dense shelf water outflow and are possibly driven by the outflow. Anomalous low core temperature of Weddell Deep Water is probably related to winter convection in the Weddell Polynya. Anomalous CTD stations at the periphery of the 1976 winter polynya region indicate that deep convection phenomena, as reported by Gordon (1978), are perhaps quite common. The observations indicate that double diffusive convection is important for vertical heat transport in the central Weddell Sea.