【摘要】 本文应用2003—2005年100 hPa北半球高度场资料,选取符合文献[2]确认的南亚高压中心位置具有季节性大幅度东进、北移和东进且伴随北移的15个个例,分析了南亚高压季节性演变与江淮梅雨期的相关。并在此基础上,计算了30~40°N纬度带的角动量输送谱,进一步分析、归纳了南亚高压季节性东进、北移过程所具有的角动量输送谱的演变特征和类型。得到了具有相当共性的诊断结论。这些结论对识别具有什么样特性和中纬度长波槽的发展与南亚高压季节性东进、北移之间存在着的响应关系,有了进一步的认识。最后本文指出在盛夏季节不同纬度间的环流相互作用对造成南亚高压大幅度东进、北移的响应关系还有待积累更多个例作进一步分析。更多还原

【Abstract】 In this paper using altitude field data of north Hemisphere at 100 hPa from 2003 to 2005,among 15 examples selected according to SAH center location cited from [2] in reference that have seasonal eastward advancing of great extent,moving forward north and eastward advancing accompanied with moving forward north,the correlation between seasonal evolvement of South Asia High(SAH) and plum rain date in Yangzi river and Huaihe basin is studied.On the basis of this study,the angular momentum of latitude stripe from 30 °N to 40 °N is calculated.The evolvement character and type about transportation spectrum of angular momentum in the course of SAH seasonal eastward and northward advances is analyzed and induced.Some common diagnostic results are found.These conclusions help to identify the features and further understand the responding relation between long wave trough movement and SAH seasonal eastward and northward advances.In the end,this paper shows that the responding relations in midsummer season between circumfluence reciprocity in different latitudes and great extent of SAH eastward and northward advances still need more examples to do more analysis.更多还原