极地海冰异常对我国夏季大气环流和降水影响的数值研究

利用全球大气环流谱模式分别进行了南极和北极海冰面积异常偏大和偏小的数值试验，对６－８月的结果进行了对比分析，讨论了极地海冰异常对我国夏季大气环流和降水的可能影响。结果表明，南极或北极海冰面积异常偏大，则我国夏季风变弱，特别蝇使得南亚高压、西北太平洋副热带高压等减弱。南极海冰面积偏大使得我国黄河－长江－带地区降水减少，北极海冰面积偏大，造成我国东部地区的降水量有所减少，模拟结果与统计分析相一致。可同

THE NUMERICAL STUDY ON THE IMPACTS OF THE POLAR SEA ICE ANOMALIES ON THE SUMMER ATMOSPHERIC CIRCULATION AND PRECIPITATION IN CHINA

In this paper,the numerical experiments of the sea ice anomalies on the South Pole or NorthPole are Performed. The comparisons of the simulated results avetaged from June to August havebeen discussed for the Possible hopects of the Pole sea ice covetage anomalies on the summer atmospheric circulation and precipithon in China. The resultb indicate that the common characteristicsinfluenced by the larger sea ice coverage on either South Pole or North Pole (comparing withsmaller sea ice coverage) are that the summer monsoon boomes weaker and reticularly so forthe South Asia High and Northwest Pacific Had. With larger sea ice coverase on the South Pole,the precipitation in the area of Huang myer and YangZi River becomes feel the precipitation inthe east part of China become less too when the w Ice coverage is barger on the North Pole. Theanalogies between the sboulated and Obeerved results show that our shoulated experiments are successful. It may be concluded that the anomaly of the sea ice on Poles is one of the important influence elements for the summer atmespberic circulation and precipitation in China.