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

发布时间：2018-04-04 02:40

本文选题：CALIPSO　切入点：气溶胶　出处：《长江流域资源与环境》2017年04期

【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。
[Abstract]:The L1 monitoring data of CALIPSO spaceborne lidar during the winter of 2007 ~ 2011 (December ~ February of the following year) are used. The total backward scattering coefficients at 532 nm, the volume depolarization ratio and the color ratio are analyzed.The vertical distribution of aerosol optical and microphysical properties during winter haze in Chongqing area was studied.The results show that during the winter haze in Chongqing area, the atmospheric scattering ability weakens with height, and is strongest at 0 ~ 1 km height, and the distribution of aerosol particle regularity and particle size is basically the same as that of the whole year.However, the variation trend is more monotonic and regular in the height layer of 1 km, the proportion of large aerosol is the largest, the proportion of large aerosol is irregular, the proportion of small particle aerosol is the largest, and the scattering intensity of aerosol increases year by year in the interannual variation.From 2008 to 2010, the change was small, and obviously increased in 2011. In each year, the regular aerosol was the main one, the irregular aerosol accounted for the largest proportion in 2011, and the proportion of the large particle aerosol increased year by year.
【作者单位】：东华大学环境科学与工程学院;重庆气象台;中国气象局国家气候中心;
【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)~~
【分类号】：X513

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