藏东南地区鲁朗河谷近地层气象要素变化特征  

Variation Characteristics of Meteorological Elements in Near Surface Layer over the Lulang Valley of Southeastern Tibetan Plateau

作　　者：王永杰[1,2,3] 马耀明[1] 朱志鹍[1,2] 李茂善[4] 

机构地区：[1]中国科学院青藏高原研究所青藏高原环境变化与地表过程实验室,北京100085 [2]中国科学院研究生院,北京100039 [3]中国气象局成都高原气象研究所,四川成都610072 [4]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》2010年第1期63-69,共7页Plateau Meteorology

基　　金：国家重点基础研究发展规划项目"青藏高原环境变化及其对全球变化的响应与适应对策"(2005CB22003);中日气象灾害合作JICA项目;国家自然科学基金项目"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"(40675012)资助

摘　　要：依据位于藏东南雅鲁藏布大峡谷分支—鲁朗河谷的中国科学院藏东南高山环境综合观测站(29°45′N,94°44′E,海拔3326m)架设的边界层气象塔2007年一整年的常规气象观测资料,初步分析了该地区的气候特征,并与珠穆朗玛峰北坡河谷的气象数据作了简单比较。结果表明:鲁朗河谷年平均地面气温为5.55℃,1月平均地面气温最低,8月平均温度最高。由于观测站处于高山峡谷之中,年平均风速只有1.70m.s-1,风速、风向主要受周围地形影响,山谷风显著。地面气压年变化呈双峰型,归属于低地到高山的过渡型。近地表大气的年平均相对湿度是73.53%。Based on the meteorological data collected in 2007 from an Planet Boundary Layer （PBL） set up at integrated observation and research station for alpine environment in South-East Tibet （ISSET） （29°45′N,94°44′E, 3326 m）, which located at Lulang Valley of the southeastern Tibetan Plateau. Some Preliminary results of climatic features over this area were obtained. The results show that the yearly mean surface air temperature is 5.55℃, the monthly mean of the air temperature was the lowest in January; while the highest in August. The year averaged wind speed is 1.70 m · s^-1 and the wind speed and direction are depended on the terrain around the site. Mountain-valley wind is prevailing here too. The annual variation of surface air pressure is in double peak pattern, it is belonging to the transion pattern - from lowland to alpine. Annual average of air relative humidity is 73.53% over the area.

关 键 词：藏东南 气象要素 近地层 鲁朗河谷 水汽通道 

分 类 号：P42[天文地球—大气科学及气象学]