山地边界层急流的观测特性及其成因分析  

THE OBSERVATIONAL FEATURES AND THE CAUSE ANALYSIS OF HILLY BOUNDARY-LAYER-JET

作　　者：郝为锋[1] 苏晓冰[1] 王庆安[2] 寇正[1] 

机构地区：[1]解放军理工大学气象学院,南京211101 [2]南京大学大气科学系,南京210093

出　　处：《气象学报》2001年第1期120-128,共9页Acta Meteorologica Sinica

摘　　要：分析浙江上虞丘陵山区边界层风、温实测资料 ,发现在高压形势下 ,该地边界层急流具有频发性和显著特征。分析表明 ,丘陵山区地形热力差异导致的气层斜压性 ,起因于湍流强度日变化的惯性振荡 ,以及湍流交换引起的动量下传 ,是该地边界层急流产生的重要机制 ;而丘陵山区特有的空悬逆温的发生发展 。After analyzing the actually wind and temperature data of hilly boundarylayer in Zhejiang Province,we find that the boundary layer jet over that area occurs frequently and has distinct features under high pressure situation.The analysis illustrates that,the layer barocline feature,resulting from the thermodynamic difference over hill terrain,derives from the inertial oscillation of turbulent intensity′s daily variation,and the moment′s downward transportation led by turbulence exchange are the essential mechanism of boundary layer jet′s formation;while, the occurrence and development of hanging inversion peculiarly in hilly area is the key factor to jet′s lasting.

关 键 词：边界层急流 斜压性 空悬逆温 湍流交换 成因 风 

分 类 号：P425[天文地球—大气科学及气象学]