摘要
Abstract
Using Micaps 3.1 data, sounding data in Ganzhou, wind profile (WPRD) (60 min) wind farm products of Yichun and automatic observation system data of Ji'an,the synoptic background, dynamic and thermal structure characteristics and evolution of the persistent advection radiation fog weather process in Ji'an from November 18 to 19 in 2012 were analyzed,the mechanism of formation and maintenance of the advection radiation fog was revealed.The results showed that this was the advection radiation fog formed by the warm and cold advection under favorable conditions after radiation cooling.In the large scale background under the favorable conditions, the warm advection moved to the surface of cold and cold advection moved to warmer surface layer, and the surface net radiation to further strengthened the ground cooling, the fog process was triggered and strengthening mechanism.The special temperature field structure increased the temperature difference between the warm air of the lower layer and surface.The weak convergence and vertical motion of the surface layer to the lower layer helped to maintain and stabilize of the wind.Sufficient water vapor provided a favorable condition for heavy fog for a long time.The main reason for the continuous advection radiation fog dissipation was the increase of the wind velocity near the surface layer and the disappearance of the low temperature inversion layer and the humidity layer.关键词
平流辐射大雾/环流形势/动力条件/热力条件/成因Key words
Advection radiation fog/Circulation situation/Dynamic condition/Thermodynamic condition/Cause分类
农业科技
