Some thoughts on the freezing and melting of sea ice and their effects on the ocean
Some thoughts on the freezing and melting of sea ice and their effects on the ocean
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DOI：
10.1016/s1463-5003(01)00005-1
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发表时间：
2001-01-01
期刊：
影响因子：
3.2
通讯作者：
Woodgate, R. A.
中科院分区：
文献类型：
--
作者：
Aagaard, K.;Woodgate, R. A.
高纬度的冻结和融化循环可以不同地导致咸水对流、淡水封顶或淡水注入海洋内部。后一过程的一个例子是北冰洋内近800米深度的次级盐度最小值，这是由于挪威海的大西洋水在巴伦支海陆架上的转化及其随后进入北冰洋造成的。虽然实际的海冰通量很小，只有0.005西帕，但在冰架上最初的咸水中，约有三分之一的淡水似乎是由冰融化造成的。这个过程的一个奇怪的特点是，在北冰洋表面通过冷冻蒸馏的水最终会在同一海洋的中层深处结束。这是由于冰向南出口到大陆架上，融化，然后通过流入北冰洋的水流流入巴伦支海。该地区海冰的长期减少以及随之而来的淡水注入可能会导致800米以下北冰洋内部变暖，含盐量增加。2001爱思唯尔科学有限公司版权所有。
The high-latitude freezing and melting cycle can variously result in haline convection, freshwater capping or freshwater injection into the interior ocean. An example of the latter process is a secondary salinity minimum near 800 m-depth within the Arctic Ocean that results from the transformation on the Barents Sea shelf of Atlantic water from the Norwegian Sea and its subsequent intrusion into the Arctic Ocean. About one-third of the freshening on the shelf of that initially saline water appears to result from ice melt, although the actual sea ice flux is small, only about 0.005 Sy. A curious feature of this process is that water distilled at the surface of the Arctic Ocean by freezing ends up at mid-depth in the same ocean. This is a consequence of the ice being exported southward onto the shelf, melted, and then entrained into the northward Barents Sea throughflow that subsequently sinks into the Arctic Ocean. Prolonged reduction in sea ice in the region and in the concomitant freshwater injection would likely result in a warmer and more saline interior Arctic Ocean below 800 m. (C) 2001 Elsevier Science Ltd. All rights reserved.