Influence of the North Atlantic SST on the atmospheric circulation
Influence of the North Atlantic SST on the atmospheric circulation
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DOI：
10.1029/1999gl900613
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发表时间：
1999-10
影响因子：
5.2
通讯作者：
A. Czaja;C. Frankignoul
中科院分区：
文献类型：
--
作者：
A. Czaja;C. Frankignoul
使用每月 COADS 数据集和 NMC-NCAR 档案，我们发现大气环流的显着异常与北大西洋先前的海温异常有关。晚春西北拉布拉多海上空的信号与前一个冬季海表温度变化的主导模式有关。它在对流层中部比在海平面更清晰可见，似乎与缓慢减弱海温异常的地表热交换异常有关。此外，初冬的类似 NAO 信号与纽芬兰东部和前年夏季东副热带北大西洋的海温异常有关。
Using the monthly COADS dataset and NMC‐NCAR archives we show that significant anomalies of the atmospheric circulation are related to previous SST anomalies in the North Atlantic. A signal over the northwest Labrador Sea in late spring is associated with the dominant mode of SST variability during the preceeding winter. It is more clearly seen in the mid‐troposhere than at sea level and appears to be related to the anomalous surface heat exchanges that slowly damp the SST anomalies. In addition, a NAO‐like signal in early winter is associated with SST anomalies east of Newfoundland and in the eastern subtropical North Atlantic during the preceeding summer.