南京上空大气边界层的激光雷达观测研究  

Observational Research on Planetary Boundary Layer by Lidar Over Nanjing City

作　　者：姜杰[1,2] 郑有飞[1,2] 刘建军 范进进[1,2] 

机构地区：[1]南京信息工程大学大气物理学院 [2]江苏省气象灾害重点实验室,江苏南京210044 [3]马里兰大学地球系统科学多学科研究中心,美国马里兰20742

出　　处：《环境科学与技术》2014年第1期22-27,80,共7页Environmental Science & Technology

基　　金：江苏省高校自然科学研究重大项目(09KJA170004);国家自然科学基金面上项目资助(41075114);国家"973"项目第五课题资助(2006CB403705)

摘　　要：为了研究南京地区大气边界层结构的变化特征,利用2010年11月到2011年10月期间米散射激光雷达对南京上空大气散射特性的连续观测资料,通过小波协方差法得到了该地区的大气边界层高度,分析了其日变化和季节变化特性以及夹卷层的日变化特性,并讨论了引起这些变化的原因,得到以下主要结论:南京上空边界层具有典型的日变化特征以及季节变化特征,夜晚低(小于0.5 km),白天高(大于1 km);最大混合层高度春季高(1.77 km),冬季低(1.34 km);边界层的日变化以及最大混合层高度与地表温度存在明显的正相关,与地表的相对湿度存在负相关;云层可以有效的降低最大混合层高度并且使最大混合层高度出现的时间提前。In order to study the structural feature of the planetary boundary layer （PBL） over Nanjing City, the height of PBL was inverted by using wavelet covariance method, based on one year＇s measurements of atmospheric scattering properties by a Mie-scatter Lidar from Nov. 2010 to Oct. 2011. The characteristics of diurnal cycle and seasonal variations of the height of PBL were analyzed and then the influence induced by meteorological conditions was discussed. Results showed that the typical diurnal cycles were found in Nanjing area with low. values less than 0.5 km at night and high values greater than lkm at daytime respectively; the maximum mixing layer height has a highest value 1.77 km in spring and a lowest value 1.34 km in winter. A significantly positive relationship between the height of PBL development （maximum mixing layer height） and the surface temperature was found, while a significantly negative relationship with the surface relative humidity was obtained. Clouds can reduce the maximum mixing layer height effectively and reduce the time to get to the maximum mixing layer height.

关 键 词：激光雷达 大气边界层 夹卷层厚度 小波协方差 

分 类 号：X16[环境科学与工程—环境科学]