Wind‐induced reorganization of the Bering shelf circulation
Wind‐induced reorganization of the Bering shelf circulation
复制标题
风引起的白令陆架环流重组
DOI：
10.1029/2012gl051231
复制
发表时间：
2012
影响因子：
5.2
通讯作者：
E. Curchitser
中科院分区：
文献类型：
--
作者：
S. Danielson;K. Hedstrom;K. Aagaard;T. Weingartner;E. Curchitser
我们提出了一个简单的框架来考虑作为对风向变化的响应的白令海东部陆架环流的可变性。观测和数值积分都表明，大部分陆架气流在西北风和东南风之间发生逆转。虽然东南风的频率较低，但它们与跨越大部分搁置地带的大型货架运输有关，在10月至4月，它们还伴随着纳瓦林角附近通常向东的气流的逆转。相比之下，西北风促进了大部分地区的场外运输，以及纳瓦林角附近向东的运输增加。阿纳德尔湾向西加强的气流对穿越漫长(∼1,000公里)陆架隔离带和白令海峡贯通流的通量的变化进行了调整。这些结果在分层程度较高的夏季条件下(5-9月)也成立，但夏季较弱的风推动较小的气流穿过陆架断裂带，大部分陆架上的输送直接进入阿纳代尔湾。
We present a simple framework for considering the variability of the eastern Bering Sea shelf circulation as a response to changes in wind direction. Both observations and numerical integrations show that much of the shelf flow reverses between northwesterly and southeasterly winds. While southeasterly winds are less frequent, they are associated with large on‐shelf transport across most of the shelfbreak, and in October–April they are also accompanied by a reversal of the normally eastward flow near Cape Navarin. In contrast, northwesterly winds promote off‐shelf transport across most of the shelfbreak, along with increased eastward transport near Cape Navarin. The westward‐intensified flow in the Gulf of Anadyr adjusts to changes both in the flux across the long (∼1000 km) shelfbreak and in the Bering Strait throughflow. These results also hold under the more stratified summer conditions (May–September), but weaker summer winds drive smaller flows across the shelf break, and the majority of the on‐shelf transport is directly into the Gulf of Anadyr.