Citation: | Liu Na, Wang Hui, Zhang Yunfei. Variation of sea surface temperature in the North Pacific based on different IPCC scenarios[J]. Haiyang Xuebao, 2014, 36(7): 9-16. doi: 10.3969/j.issn.0253-4193.2014.07.002 |
Using the multi-model datasets of 20C3M and the SRESA1B scenario projection from Program for Climate Model Diagnosis and Intercomparison for IPCC-AR4,we have investigated the sea surface temperature (SST) changes in the North Pacific and its response to wind stress changes in the North Pacific under different atmospheric greenhouse gases scenarios. The analysis shows that the SST will increase in most parts of the North Pacific as a result of the effect of higher atmospheric CO2 concentration,with the maximum increasing center located along the Kuroshio Extension region. We conclude that the warming in the SRESA1B scenario over the North Pacific especially along the Kuroshio Extension might be attributable to the stronger easterlies prevail in the central Pacific and poleward shift of the zero wind stress curl line. This Ekman response is local and fast. On the other hand,because the zero wind stress curl line displaced to higher latitudes,it generates stronger Kuroshio and its extention. It also generates anomalous Rossby waves at the latitude of zero wind stress curl line which propagate to the west. The Rossby waves change the thermocline in the Kuroshio Extension region and eventually warm the SST. The changes of wind stress in the interior North Pacific eventually generate SST warm anomalies in the Kuroshio Extension region several years later.
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