静止锋附近中尺度流场运动学特征  

The Mesoscale Characteristics of Kinematics of a Wind Field near the Stationary Front

作　　者：戴铁丕[1] 陈明[1] 梁汉明[1] 陈钟荣[1] 

机构地区：[1]南京气象学院,210035

出　　处：《气象》1993年第2期12-16,共5页Meteorological Monthly

摘　　要：利用多普勒天气雷达收集到的资料,分析了江淮流域大暴雨后期静止锋附近风场的中尺度结构特征。结果表明:静止锋附近的近地面层为冷平流,再往上为暖平流。低层吹东北风,随着高度增大,风速减小。在2km高度附近,风速最小,以后转为西南风。分析还发现,在低层可能存在垂直环流和辐散,其上则为辐合。The characteristics of mesoscale structures of a wind field near the stationary front in the period of rainstorm in the Jianghuai area is analysed based on the wind data of doppler radar in Nanjing Institute of Meteorology. Results indicate that there is a cold advection in the surface layer and a warm advection at the higher level near the stationary front. At low-layer wind direction is Northeast, wind speed decreased with the altitude. At the 2. 0 km level wind speed reaches to the minimum and wind direction shifts to southwest,we find that vertical circulation and divergence exist at the low-level and convergence at the higher level.

关 键 词：多普勒 天气雷达 风场 暴雨 运动学 

分 类 号：P433[天文地球—大气科学及气象学]