Reshaping the Antarctic Circumpolar Current via Antarctic Bottom Water Export
Reshaping the Antarctic Circumpolar Current via Antarctic Bottom Water Export
复制标题
通过南极底层水输出重塑南极绕极流
DOI：
10.1175/jpo-d-17-0007.1
复制
发表时间：
2017
影响因子：
3.5
通讯作者：
A. Hogg
中科院分区：
文献类型：
--
作者：
A. Stewart;A. Hogg
西风向南极绕极流(ACC)输入的纬向动量最终通过阻碍绕极流路径的大水深特征引起的地形形应力被消除。这些测深特征还支持南极底层水(AABW)通过向北的深地转平衡的水流穿过ACC输出。这些深地转流改变了地形形式的应力，意味着AABW输出的变化将改变海底压力，并要求ACC重新安排，以保持其纬向动量平衡。利用ACC动量平衡的概念模式，推导出AABW的体积输出与ACC直立弯道上的海面形状之间的关系。用一个包括南大洋经向翻转环流上部和下部的理想涡旋分辨ACC/南极陆架通道模式检验了这一预测，该模式使用两种不同的地形配置。
AbstractZonal momentum input into the Antarctic Circumpolar Current (ACC) by westerly winds is ultimately removed via topographic form stress induced by large bathymetric features that obstruct the path of the current. These bathymetric features also support the export of Antarctic Bottom Water (AABW) across the ACC via deep, geostrophically balanced, northward flows. These deep geostrophic currents modify the topographic form stress, implying that changes in AABW export will alter the ocean bottom pressure and require a rearrangement of the ACC in order to preserve its zonal momentum balance. A conceptual model of the ACC momentum balance is used to derive a relationship between the volume export of AABW and the shape of the sea surface across the ACC’s standing meanders. This prediction is tested using an idealized eddy-resolving ACC/Antarctic shelf channel model that includes both the upper and lower cells of the Southern Ocean meridional overturning circulation, using two different topographic configu...
影响因子：
3.5
作者：
Langlais, Clothilde E.;Rintoul, Stephen R.;Zika, Jan D.
通讯作者：
Zika, Jan D.
影响因子：
3.5
作者：
A. Thompson;A. N. Garabato
通讯作者：
A. Thompson;A. N. Garabato
影响因子：
3.5
作者：
Howard E
通讯作者：
Howard E