Recent interannual upper ocean variability in the deep southeastern Bering Sea
Recent interannual upper ocean variability in the deep southeastern Bering Sea
复制标题
白令海东南部深部近期上层海洋的年际变化
DOI：
10.1357/0022240053693725
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发表时间：
2005
影响因子：
0.5
通讯作者：
G. Johnson
中科院分区：
文献类型：
--
作者：
Amy E. Wirts;G. Johnson
白令海阿留申盆地东南部上层海洋近期的季节和年际变化与海气通量、海洋平流和混合有关。在2001/2002年冬季和2002/2003年冬季之间，从区域电导率-温度-深度（CTD）浮标剖面阵列的数据中观察到上层海洋变暖和变新鲜。2002/2003年的暖冬形成了一个异常温暖、新鲜、明亮、浅的冬季混合层和一个弱通风的最低温度层。这些不寻常的冬季条件导致了阿留申盆地东南部地下温度反转特征的大幅减少。热收支分析、一维海洋上层模式运行和高度计海面高度异常表明，非典型海洋平流和异常大气强迫的组合是2002/2003年海洋上层异常条件的原因。观测到的2002/2003年的增温和最低温度的消失似乎为2003/2004年的水柱走向类似的结构提供了条件，尽管回归到更正常的大气强迫。
Recent seasonal and interannual variability of the upper ocean in the southeast Aleutian Basin of the Bering Sea is related to air sea fluxes, ocean advection, and mixing. Between the winter of 2001/2002 and that of 2002/2003 a warming and freshening of the upper ocean was observed in data from a regional array of profiling Conductivity-Temperature-Depth (CTD) floats. The mild winter of 2002/2003 resulted in an unusually warm, fresh, light, and shallow winter mixed layer and a weakly ventilated temperature minimum layer. These unusual winter conditions contributed to a substantial reduction in the subsurface temperature inversion characteristic of the southeast Aleutian Basin. Heat budget analysis, one-dimensional upper ocean model runs, and altimeter sea-surface height anomalies suggest that a combination of atypical ocean advection and anomalous atmospheric forcing contributed to the unusual upper ocean conditions in 2002/2003. The observed warming and disappearance of the temperature minimum in 2002/2003 appears to have preconditioned the water column toward a similar structure in 2003/2004, despite a return to more normal atmospheric forcing.