摘要
利用MM5中尺度数值模式对发生在华南地区的一次辐射逆温和一次平流逆温个例进行数值模拟研究,并将模式模拟的结果与实况进行了对比,揭示出2种不同类型逆温发生发展过程各自的特点。结果表明:晴天逆温的形成主要受夜晚地面长波辐射的影响,白天太阳短波辐射的增强促使其消散;雾日的平流逆温主要是由南进的弱冷空气从下向上逐渐锲入的过程致使原本的暖空气向上抬升造成的,其消散主要受到白天太阳短波辐射加强和冷空气减弱等方面的影响。
Inversion layers always appears in the atmospheric boundary layer. These inversions are closely related to the air pollutions. In order to describe and distinguish these two types of inversions, radiation and advection inversions, a mesoscale model MM5 was utilized to simulate two inversion cases. One is a radiation inversion case occurred in Macao during Feb 5 to 6, 2002 and the other is an advection inversion case occurred in Nanling mountain area during Mar 6 to 7, 2001. The simulation results after comparing with the observations showed that： （1） The radiation inversion was mainly caused by the long-wave radiation from ground. In the daytime the inversion was decreased mainly by the short-wave radiation; （2） The advection inversion was caused by the incursion of the southward cold air. The warm air was lifted with the incursion process. The dissipation of the inversion Was mainly influenced by the increase of the solar short-wave radiation and the decrease of cold air.
出处
《中山大学学报（自然科学版）》
CAS
CSCD
北大核心
2008年第1期103-107,共5页
Acta Scientiarum Naturalium Universitatis Sunyatseni
基金
国家863计划基金资助项目(2006AA06A306)
广东省博士启动基金资助项目
关键词
华南地区
辐射逆温
平流逆温
数值模拟
radiation inversion
advection inversion
numerical simulation
South China
