摘    要本文利用2007-2015年浙江省68个观测站的气象数据，分析得到浙江省霾日的时空分布特征，同时基于CALIOP激光雷达数据，通过分析衰减后向散射系数，对浙江霾日时大气气溶胶体积退偏振比和色比的垂直分布进行了研究。结果表明，浙江省霾日出现最多的地区是浙北平原以及金衢盆地，出现霾日最多的季节是冬季，出现霾日最少的季节是夏季；0-2km高度层中，色比值集中在0。1-0。7范围内。2-10高度层中，色比值集中在0-0。6范围内，但在8-10km高度层中，色比值在1。6以上的气溶胶比例比其他高度层更大；0-2km和4-8km高度层中，气溶胶粒子相比其他高度层非球形度更高，8-10km高度层的球形气溶胶相比其它层所占比重更大。89757

Abstract In this study, by making use of the meteorological data from 2007 to 2015 in Zhejiang Province from 68 meteorological observation stations，temporal and spatial distribution characteristics of haze days in Zhejiang had been analyzed，and based on CALIOP lidar data，vertical distribution of volume depolarization ratio and attenuated color ratio of aerosol in haze days were revealed by analyzing attenuated backscatter coefficient。 The results showed that northern Zhejiang plain and jinqu basin showed higher frequency of haze than other regions in Zhejiang，and the season that has the highest frequency of haze is winter，the season that has the lowest frequency of haze is summer。 In the range of 0-2km height，attenuated color ratio were centered at 0。1-0。7。 In the range of 2-10km height, attenuated color ratio were centered at 0-0。6, but in the range of 8-10km height, the proportion of aerosol ,whose attenuated color ratio is bigger than 1。6, is larger than other levels。 In the range of 0-2km and 4-8km height, the asphericity of aerosol is higher than other levels，in the range of 8-10km height, the proportion of spherical aerosol is larger than other levels。

毕业论文关键词：霾；气溶胶；时空分布；CALIPSO；衰减后向散射系数；体积退偏振比；色比

key words: haze; aerosol; spatial and temporal distribution; CALIPSO; attenuated backscatter coefficient; volume depolarization ratio; attenuated color ratio

目   录

一、研究背景与意义 4

二、主要研究内容及技术路线 5

（一）研究内容 5

（二）技术路线 6

三、研究区和源Q于W优E尔A论S文R网wwW.yOueRw.com 原文+QQ75201,8766 数据集 6

（一）研究区 6

（二）数据 7

1、气象数据 7

2、CALIOP激光雷达数据 8

四、研究方法 9

五、结果与讨论 11

（一）霾日时空分布 11

1。浙江省灰霾天气在空间上的分布 11

2。浙江省灰霾天气的季节变化和月变化 13

（二）霾日气溶胶垂直分布 16

1。霾日气溶胶色比值的垂直分布 17

2。霾日气溶胶体积退偏振比的垂直分布 19

六、结论 20

一、研究背景与意义

随着我国经济的快速发展和城市化进程的加快，空气中人为排放的颗粒物增多，大气污染日益严重，灰霾天气成为我国主要的灾害性天气现象之一。