• 关键词：霾  消光系数  532 nm后向散射系数  体积退偏比  色比

• 基金项目：国家自然科学基金(No.41575002);上海市气象与健康重点实验室开放基金;上海市大气颗粒物污染防治重点实验室开放课题;2013绿苗计划(No.77)

• 徐婷婷
• 1. 东华大学环境科学与工程学院, 上海 201620;2. 上海市大气颗粒物污染防治重点实验室, 上海 200433

• 陈勇航
• 东华大学环境科学与工程学院, 上海 201620

• 赵兵科
• 中国气象局上海台风研究所, 上海200030

• 张华
• 中国气象局国家气候中心, 北京 100081

• 成天涛
• 上海市大气颗粒物污染防治重点实验室, 上海 200433

• 孙冉
• 东华大学环境科学与工程学院, 上海 201620

• 丁明月
• 东华大学环境科学与工程学院, 上海 201620

• 顾非凡
• 东华大学环境科学与工程学院, 上海 201620

• 摘要：采用美国国家航空航天局的云-气溶胶激光雷达红外开拓者卫星搭载的正交极化云-气溶胶激光雷达数据产品,包括消光系数、光学厚度、总后向散射系数、体积退偏比和色比,结合地面监测的颗粒物质量浓度,分析上海大气相对湿度小于80%霾发生期间气溶胶光学属性的垂直分布特征和颗粒物质量浓度变化,并与非霾期间进行比较.结果表明:霾期间532 nm和1064 nm消光系数在垂直高度上(海拔:0~10 km)均大于非霾期间,且大多数霾期间颗粒物在整层大气的光学厚度大于非霾期间.在近地面,霾期间大气颗粒物散射能力大于非霾期间.各垂直高度层,霾与非霾期间小粒径和规则气溶胶占主导地位.霾期间近地面大粒径颗粒物在霾期间所占比例大于非霾期间;2.0~4.0 km高度层,霾和非霾期间细颗粒所占比例接近;4.0~10.0 km高度层,霾期间细颗粒气溶胶所占比例大于非霾期间.PM₁、PM_2.5和PM₁₀质量浓度在霾期间均大于非霾期间,且霾期间细颗粒物所占比例明显增加.颗粒物质量浓度和比值PM₁/PM_2.5和PM_2.5/PM₁₀分别随霾污染程度的加重而升高.冬季颗粒物质量浓度最高,主要来自细颗粒物的贡献;而春季PM₁₀质量浓度高于其它季节.

• Abstract：Using Level 1 and Level 2 data obtained from Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observations (CALIPSO) satellite of National Aeronautics and Space Administration (NASA), the vertical profile of ambient aerosols during haze and non-haze periods with relative humidity less than 80% in Shanghai were analyzed. The correlation between optical properties and mass concentration were presented by analysis of extinction efficient, optical thickness, total attenuated backscatter coefficient, volume depolarization ratio, total attenuated color ratio and particle mass concentration during haze periods, and then compared with those during non-haze periods. The result showed that during haze periods the extinction efficient of 532 nm and 1064 nm and aerosol optical thickness were larger than that during non-haze periods within altitude of 0~10 km. During the altitude of 0~10 km, the fine and regular particles were dominant during haze and non-haze periods. Aerosols were mainly accumulated near the ground within 0~2 km. During haze periods, the proportion of fine particles was less within 0~2 km and similar as in non-haze periods in attitude range of 2~4 km. The concentrations of PM₁, PM_2.5 and PM₁₀ and the percentage of fine particles were higher. PM concentrations and the values of PM₁/PM_2.5 and PM_2.5/PM₁₀ increased along with increasing in haze intensity. The mean concentrations of PM₁ and PM_2.5 were the highest and percentage of fine particle increased significantly in winter while PM₁₀ concentration was the highest in spring.

• Key words：haze  extinction coefficient  532 nm total attenuated backscatter coefficient  volume depolarization ratio  total attenuated color ratio

• 
  摘要点击次数： 1563 全文下载次数： 2844