经纬向热源(汇)异常对环流影响的数值试验

SIMULATION OF EFFECTS ON CIRCULATION OF LATITUDINAL/ LONGITUDINAL ANOMALOUS HEATING

利用１９８３～１９８８／１９８９年６年季平均全球加热场资料，分析了各年相对于６年平均的距平沿经、纬向非均匀分布的特征。并且，基于加热异常沿经向表现为正负相间分布和沿纬向有几个加热异常中心的特征，利用定常态初始方程三维谱模式进行了加热异常沿经、纬向非均匀分布对环流影响的数值试验。结果表明，加热异常的经向非均匀分布显著增强了经向环流的异常，所引起的环流异常与几个孤立热源（汇）作用的结果的线性叠加有较大差异，而加热异常的纬向非均匀分布对环流影响的线性叠加作用相对明显。

With 1983～1988/1989 seasonally averaged global heating data, the latitudinal and longitudinal uneven distribution characteristics of the heating anomaly with respect to 6 year mean in these years are analyzed. Based on the heating anomaly is alternate positive and negative anomaly meridionally and there are some main heating anomaly zonally. Numerical simulation is carried out of influence on circulation of latitudinal/longitudinal uneven anomalous heating in terms of a 3D steady primitive equation spectral model. Evidence suggests that the latitudinal uneven anomalous heating enhances obviously the meridianal circulation anomaly which is different from the linear superposition of circulation anomaly caused by those single anomalous heatings while the linear superposition effects of longitudinal uneven anomalous heating is relatively clear.