从气溶胶微物理属性分析冬季重庆地区霾的垂直分布特征  

VERTICAL DISTRIBUTION OF ATMOSPHERIC AEROSOL MICROPHYSICAL PROPERTIES OVER CHONGQING AREA DURING HAZE PERIODS IN WINTER

作　　者：刘海晨[1] 丁明月 江文华 陈勇航[1] 张华[3] 杜豪杰[1] 李嘉栋[1] 邱靖涵 

机构地区：[1]东华大学环境科学与工程学院,上海201620 [2]重庆气象台,重庆401147 [3]中国气象局国家气候中心,北京100081

出　　处：《长江流域资源与环境》2017年第4期641-648,共8页Resources and Environment in the Yangtze Basin

基　　金：国家自然科学基金项目(91644211;41575002;41375021);重庆市气象局开放式研究基金项目(kfjj-201203)~~

摘　　要：采用2007~2011年冬季(12月~次年2月)CALIPSO星载激光雷达L1监测数据,通过分析532 nm总后向散射系数、体积退偏比和色比,对重庆地区冬季霾期间气溶胶光学和微物理特性的垂直分布进行了研究。结果表明:重庆地区冬季霾期间,大气散射能力随高度减弱,在0~1 km高度最强;各高度层气溶胶粒子规则性与粒径大小的分布情况与全年总体分布情况基本相同,但变化趋势单调性更强,0~1 km高度层规则的、大颗粒气溶胶所占比例最大,3~4 km高度不规则的、小颗粒气溶胶所占比例最大;年际变化上,气溶胶散射强度逐年增强,其中2008~2010年变化较小,2011年明显增强;各年均以规则的、小颗粒气溶胶为主,2011年不规则气溶胶所占比例最大,而大颗粒气溶胶所占比例逐年增大。Based on the onboard LIDAR data from CALIPSO satellite of National Aeronautics and Space Administration （NASA） from December 2007 to February 2011, the vertical distribution of optical and micro-physical properties of aerosols around Chongqing during the haze periods in winter were revealed by analyzing the parameters of 532 nm total attenuated backscatter coefficient, volume depolarization ratio and total attenuated color ratio. The results showed that, during haze periods in winter, the scattering ability of atmospheric aerosols generally decreased with increasing altitude, being strongest in low troposphere （0-lkm）. The distribution of regularity and size of particles within the altitude range of 1-4km were the same throughout the year, but the trend monotonous was stronger. The proportion of regular aerosols and coarse particles were the most in low troposphere （0-1km）, and the proportion of irregular aerosols and fine particles were the most in middle troposphere （3-4km）. Comparing the situation in each year, the scattering intensity had an increasing trend. The scattering intensity from 2008 to 2010 varied within a small range, there was a significant increasing in 2011. Regular aerosols and fine particles were the dominant aerosols from 2007 to 2011, the proportion of irregular aerosols were the most in 2011. In addition, the proportion of coarse particles was increasing year by year.

关 键 词：CALIPSO 气溶胶 霾 垂直分布 

分 类 号：P401[天文地球—大气物理学与大气环境]