Mechanism of Formation and Evolution Process of the Asian Continental Cold High in Winter

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 clod high positions are determined by the continental cooling source of lower troposphere resulting from radiative cooling in the atmosphere and sensitive heat of the earth surface, and by the topographic dynamic sink. The results also show that(a) after cold high is formed, it moves southward owing to the action of cold advection in troposphere, its path and reaching latitude are related to the topographic action, (b) the heating sources formed by the sensitive heating transport on the sea-surface in winter play an important role for the variation of cold high movement.