青藏高原纳木错湖区大气边界层结构分析  

Study on Characteristic of Atmospheric Boundary Layer over Lake Namco Region,Tibetan Plateau

作　　者：吕雅琼[1] 马耀明[1] 李茂善[2] 孙方林[2] 

机构地区：[1]中国科学院青藏高原研究所,北京100085 [2]中国科学院寒区旱区环境与工程研究所西部气候环境与灾害实验室,甘肃兰州730000

出　　处：《高原气象》2008年第6期1205-1210,共6页Plateau Meteorology

基　　金：国家自然科学基金“青藏高原纳木错地区近地层能量交换及环流变化观测研究”项目(40675012);国家基础发展规划项目“青藏高原环境变化及其对全球变化的响应与适应对策”(2005CB422003)共同资助

摘　　要：利用2007年8月8～19日期间系留气球低探空和GPS无线电探空资料，分析了纳木错湖区大气边界层高度、风、温、湿等要素的垂直结构。结果表明：纳木错湖的冷湖效应推迟了边界层湍流混合及对流边界层出现的时间，边界层高度日变化非常明显，对流边界层高度最高可达1750m；在晴天条件下，边界层内湖陆风日变化非常明显，湖陆风控制范围常超过边界层高度，可达对流层中部；边界层内比湿变化呈V型变化，白天减小，夜间增大，早晨08：00出现峰值。Using the radio-sounding and tether-sonde data from August 8 to 19, 2007, the characteristics of atmospheric boundary layer height, wind, temperature, specific humidity and other elements of the vertical structure over the Namco Lake area of the Tibetan Plateau are analyzed. The results show that： The cold lake in Namco lake effect postponed the time of the convective boundary layer. The diurnal variation of boundary layer height is very obvious. The convective boundary layer height is up to 1750 m in sunny condition. Obviously, the region dominated lake breeze exceed boundary layer height, and even the middle troposphere. The specific humidity has V-type change, it is decreased during the day and increased at night, and it reaches peak at 08：00.

关 键 词：纳木错 探空观测 大气边界层垂直结构 湖陆风 

分 类 号：P404[天文地球—大气科学及气象学]