The Teleconnection Of Sea Surface Temperature In North Atlantic And North Pacific And Its Relation With China Winter Temperature/Summer Precipitation

By using the NOAA-NESDIS monthly data of global sea surface temperature (SST) from 1958 to 2001, the teleconnection of SST anomaly between North Atlantic and North Pacific is studied in this paper. Based on four seasons and two time scales, the strong teleconnection of SST anomaly between North Atlantic and North Pacific are demonstrated. The Anomaly Index (I) of SST anomaly is constructed from the time coefficient of the principal SVD (Singular Value Decomposition) pattern. The correlation of Anomaly Index and Asia-Pacific monsoon and that of Anomaly Index and the winter temperature and summer precipitation of China are analyzed. The main results are as follows. 1) On the inter-decadal time scale, the distribution of North Atlantic SST anomaly is mostly positive, while the distribution of North Pacific SST anomaly is mostly negative. The time coefficients of SST are quasi-synchronously changed. In the inter-annual time scale, the distributions of SST in two oceans are dipolar in north-south direction. For North Atlantic, it's positive in south while negative in north, and the time coefficient oscillates in a two-year quasi-period. For North Pacific, it's positive in south while negative in north, and the time coefficient oscillation period is three to four years. 2) The SST teleconnection pattern between North Pacific and North Atlantic is significant in the whole year and the time coefficients of SST anomaly are quasi-synchronously changed on both time scales. On the inter-decadal time scale, the time coefficients transit from negative to positive during the late 1970s. On the inter-annual time scale, the time coefficient oscillation period is three to four years in winter and it oscillates in a two year quasi-period in summer. 3) The SST anomalyteleconnection pattern between North Pacific and North Atlantic can cause the decline of Asia-Pacific winter monsoon in Mongolia region and the inland of China which leads to the temperature rise in south He-tao region and the area centered in middle reaches of Yangtse River. 4) The SST anomaly teleconnection pattern is in favor of the decrease of the precipitation in North China, while boosts the increase of the precipitation in Yangtse River valley.