冬季亚洲大陆冷高压形成和发展的物理机制研究  

MECHANISM OF FORMATION AND EVOLUTION PROCESS OF THE ASIAN CONTINENTAL COLD HIGH IN WINTER

作　　者：夏友龙[1] 朱抱真[2] 

机构地区：[1]北京气象学院 [2]中国科学院大气物理研究所

出　　处：《应用气象学报》1992年第2期206-211,共6页Journal of Applied Meteorological Science

摘　　要：本文根据一个两层全球大气环流的谱模式,对大陆冷高压的形成和发展过程的一些物理机制进行了分析探讨,并作了有无地形的对比试验。分析结果指出,对流层大气的辐射冷却和地面感热造成了对流层低层的大陆冷源,以及地形性动力下沉运动控制了高压中心的位置。分析还指出,大陆冷高压形成后,受平流作用向南侵袭,冷高压的移动路径和南侵所达到的纬度与地形作用有关;冬季海面的感热输送使大陆冷高压入海变性。By using a two-level global spectral model,the mechanism of formation and evolution process of continental cold high and topographic action in the model are studied.We find that coldhigh positions are determined by the continental cooling source of lower troposphere resultingfrom radiative cooling in the atmosphere and sensitive heat of the earth Surface,and by the topo-graphic dynamic sink.The results also show that(a)after cold high is formed,it moves southward owing to the ac-tion of cold advection in troposphere,its path and reaching latitude are related to the topographicaction,(b)the heating sources formed by the sensitive heating transport on the sea-surface in win-ter play an important role for the variation of cold high movement.

关 键 词：冬季 冷高压 形成 物理机制 

分 类 号：P434[天文地球—大气科学及气象学]