刘屹岷,吴国雄,刘辉,刘平. 1999. 空间非均匀加热对副热带高压形成和变异的影响──Ⅲ:凝结潜热加热与南亚高压及西太平洋副高[J]. 气象学报, 57(5):525-538, doi:10.11676/qxxb1999.051
空间非均匀加热对副热带高压形成和变异的影响──Ⅲ:凝结潜热加热与南亚高压及西太平洋副高
THE EFFECT OF SPATIALLY NONUNIFORM HEATING ON THE FORMATION AND VARIATION OF SUBTROPICAL HIGH PART Ⅲ:CONDENSATI0N HEATING AND SOUTH ASIA HIGH AND WESTERN PACIFIC SUBTROPICAL HIGH
投稿时间:1998-08-24  修订日期:1998-11-03
DOI:10.11676/qxxb1999.051
中文关键词:  空间非均匀加热  对流凝结加热  南亚高压  西太平洋副热带高压
英文关键词:Spatially nonuniform heating  Connective condensation heating  South Asia high  Western Pacific subtropical high
基金项目:国家自然科学基金委员会重点项目“副热带高压带的变异机理”49635170;优秀国家重点实验室项目(49823002);项目(49905002)的联合资助
作者单位
刘屹岷 中国科学院大气物理研究所大气科学和地球流体力学数值模拟国家重点实验室 北京 100029 
吴国雄 中国科学院大气物理研究所大气科学和地球流体力学数值模拟国家重点实验室 北京 100029 
刘辉 中国科学院大气物理研究所大气科学和地球流体力学数值模拟国家重点实验室 北京 100029 
刘平 中国科学院大气物理研究所大气科学和地球流体力学数值模拟国家重点实验室 北京 100029 
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中文摘要:
      通过理论分析和数值模拟,研究了降水所致凝结潜热影响副热带高压带断裂的物理机制。基于全型垂直涡度方程的尺度分析指出,强的对流凝结加热的垂直梯度的变化,导致副热带地区对流层高层和中低层的高低压分布呈现出反位相。数值试验证实凝结潜热是决定东半球夏季副热带高压位置和强度的关键因素:东亚季风降雨所致凝结潜热加热使高层南亚高压位于加热中心西侧,中层西太平洋副热带高压位于加热中心东侧。通过定常波的传播,副热带地区的凝结潜热加热对中高纬天气的形成和维持有一定影响。
英文摘要:
      The effect of condensation heating on the formation of enclosed subtropical anticyclone centers is studied using theoretical analysis and numerical simulation. The complete form of vertical vorticity tendency equation is employed for the analysis. It is found that, due to the variation of the vertical gradient of strong convective condensation heating, the distribution of cyclone and anticyclone in upper troposphere is out of phase with that in the middle and lower level in the troposphere. This is confirmed by numerical experiments. It is concluded that condensation heating is a key factor for the formation and location of summer subtropical high in the eastern hemisphere. The latent heating released by the monsoon rainfall forces the 200hPa South Asia high on the western side of heating center, and the 500hPa Western Pacific subtropic high on the eastern side of the center. Circulation in mid-high latitudes is also affected by the latent heating in subtropical area through the propagation of Rossby wave.
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