通过海气耦合模式CCSM3( The Community Climate System Model version 3),研究在北大西洋高纬度淡水强迫下,北太平洋冬季的海表温度SST、风场及流场的响应及其区域性差异.结果表明:淡水的注入使北太平洋整体变冷,但有部分区域异常增暖;在太平洋东部赤道两侧,SST的变化出现北负南正的偶极子型分布.阿留申低压北移的同时中纬度西风减弱,热带附近东北信风增强.黑潮和南赤道流减弱,北太平洋副热带逆流和北赤道流增强,日本海被南向流控制.风场及流场的改变共同导致了北太平洋SST异常出现复杂的空间差异:北太平洋中高纬度SST的降温主要由大气过程决定,海洋动力过程主要影响黑潮、日本海及副热带逆流区域的SST,太平洋热带地区SST异常由大气与海洋共同主导.%The changes and its regional differences of sea surface temperature, wind speed and ocean circulation in North Pacific Ocean induced by freshwater input in North Atlantic Ocean are investigated using The Community Climate System Model version 3 (CCSM 3). The analyses are based on boreal winter responses. The results demonstrate as follow: warming in particular areas on North Pacific Ocean although cooling is dominated; SST increases on south of the equator in the eastern tropical Pacific and causes tropical SST dipole. Aleutian low is shifted northward while midlatitude westerlies are weakened; the northeast trades are intensified in tropical Pacific. Kurshio and south equatorial current are weakened while subtropical countercurrent and north equatorial current are intensified. The southward currents play a crucial role in Japan Sea. The changing of wind and ocean current together cause SST in north Pacific. a-nomaly distributes in a complex space variability. The cooling in North Pacific mid and high latitudes are dominated by atmospheric processes. Ocean dynamic process mainly affects the area of Kuroshio, Japan Sea and subtropical countercurrent. But tropical Pacific SST anomaly results from a mixed effect of atmosphere and ocean.
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