Importance of wind‐driven sea ice motion for the formation of Antarctic Intermediate Water in a global climate model
Importance of wind‐driven sea ice motion for the formation of Antarctic Intermediate Water in a global climate model
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全球气候模型中风驱动的海冰运动对于南极中层水形成的重要性
DOI：
10.1029/2001gl013632
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发表时间：
2001
影响因子：
5.2
通讯作者：
A. Weaver
中科院分区：
文献类型：
--
作者：
O. Saenko;A. Weaver
利用海洋-大气-海冰模式研究了风驱动海冰运动在南极中层水形成中的重要性。该模式能够合理地模拟低盐度AAIW舌即使从风到海洋的直接动量传递被忽略，只要风应力施加到海冰。相比之下，当风应力专门驱动海洋时，模型未能捕捉到AAIW的属性。海冰的增长和随后的近海运输充当了从形成AABW的近海岸区域到形成AAIW的副极地区域的淡水管道。海冰动力学也被证明是重要的模拟当地的盐度最低在中间深度在南印度洋和当地的盐度最高在西部威德尔海。
An ocean‐atmosphere‐sea ice model is used to show the importance of wind‐driven sea ice motion in the formation of Antarctic Intermediate Water (AAIW). The model is able to reasonably simulate a tongue of low salinity AAIW even when the direct momentum transfer from wind to the ocean is neglected, provided that the wind stress is applied to sea ice. In contrast, when the wind stress exclusively drives the ocean, the model fails to capture the properties of AAIW. The growth and subsequent offshore transport of sea ice acts as a freshwater conduit from near‐shore regions, where AABW is formed, to subpolar regions, where AAIW is formed. Sea ice dynamics are also shown to be important in the simulation of a local salinity minimum at intermediate depths in the southern Indian Ocean and a local salinity maximum in the western Weddell Sea.