摘要
为了研究北京城区夏季大气边界层结构变化特征及大气边界层内气溶胶消光特性,2004年8月利用便携式米散射激光雷达对北京城区夏季大气边界层进行了系统观测。反演了观测站上空大气气溶胶的消光特性垂直分布以及大气边界层的高度。分析了气象条件和人类活动对大气边界层结构的影响。观测数据表明:北京城区夏季大气边界层有明显的日变化特征,早晚比较低,日间有一个从低变高再变低的过程,中午前后达到最高。结合气象参数对测量数据进行的统计分析表明:北京城区夏季大气边界层高度相对稳定,多分布在1.8 km以下,平均值为0.68 km;大气边界层内存在浓度较高的气溶胶粒子,平均光学厚度(3 km以内)在0.30左右。
In order to study the structural feature of the atmospheric boundary layer （ABL） over Beijing and the aerosol extinction characteristic in it, ABL over Beijing was observed with a potable Mie LIDAR in the summer of 2004. The vertical distribution of extinction properties and the height of ABL over the observation site were inverted. And the influences induced by meteorological conditions and human activities on the ABL structure were analyzed. The data indicates that the variation of ABL over Beijing in the daytime in summer is obvious. With meteorological parameters, the detected data of ABL heights and aerosol optical depth are presented and discussed. The research result shows that the ABL height is always less than 1.8 km, its average height is 0. 68km and the aerosol optical depths within 3kin are about 0.3.
出处
《应用光学》
CAS
CSCD
2008年第1期96-100,共5页
Journal of Applied Optics
基金
北京市重大科技计划资助项目(H020620250230)
国家973计划资助项目(2006CB403702)
国家自然科学基金资助项目(40475052)
关键词
激光雷达
大气边界层
气溶胶光学厚度
LIDAR
atmospheric boundary layer
aerosol optical thickness
作者简介
王珍珠（1981-），男，安徽宿州人，硕士，主要从事激光雷达大气探测研究工作。E-mail：zzwang@aiofm．ac．cn
