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极移季节变化的地球物理定量激发迄今未得到圆满的解释.基于大气海洋耦合数值环流模式,计算了大气和地表水及海洋角动量变化.与日本气象局（JMA）客观分析资料计算的大气角动量比较,模式模拟的大气角动量东经90°分量要优于0°分量.地表水和海洋激发有效地减少了极移与JMA大气角动量之间季节尺度上的差异,并且结合JMA和美国环境预测中心（NCEP）的大气角动量对极移周年变化的综合激发都优于NCAR-CSM1气候模式的结果.
Geophysical quantitative excitation of the seasonal variation of polar migration has not yet been satisfactorily explained so far.On the basis of atmospheric-ocean coupled numerical circulation model, the changes of atmospheric and surface water and oceanic angular momentum are calculated and compared with the atmospheric angle calculated by objective analysis data from Japan Meteorological Administration (JMA) Compared with the momentum, the 90 ° east-west component of the mode-simulated atmospheric angular momentum is better than the 0 ° component.The surface water and oceanic excitations effectively reduce the seasonal scale differences between polar motion and JMA atmospheric angular momentum, and combine the JMA with the U.S. environment The comprehensive excitation of the annual angular variation of atmospheric motion by the prediction center (NCEP) is superior to that of the NCAR-CSM1 climate model.