| 黄家敏,陈星宇,安静宇,杨洪海,陈勇航,王秀珍,张 华,冯帆,李 梦,刘岩.霾期间上海低层气溶胶微物理属性与地面相对湿度分析[J].沙漠与绿洲气象,2015,9(1):39~44 |
| 霾期间上海低层气溶胶微物理属性与地面相对湿度分析 |
| Analysis of Low-level Aerosol Microphysical Properties and Surface Relative Humidity during the Haze in Shanghai |
| 投稿时间：2014-05-19 修订日期：2014-07-10 |
| DOI： |
| 中文关键词: 霾 地面相对湿度 气溶胶 CALIPSO卫星 微物理属性 |
| 英文关键词:haze relative humidity aerosol CALIPSO microphysical properties |
| 基金项目:国家重点基础研究发展计划(No. 2011CB403405)；杭州市科技发展计划项目(20120433B18)；国家自然科学基金(No.40975012) |
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| 中文摘要: |
| 本文采用2007年1月至2010年11月美国国家航空航天局(NASA)的CALIPSO星载激光雷达资料,通过532nm总后向散射系数、体积退偏比和色比,分析了上海地区霾期间低层0-2km高度气溶胶微物理属性与地面相对湿度的关系。结果表明,当后向散射系数在0~0.001 km-1?sr-1范围内时,其频率在地面相对湿度为65%—80%时最大；当后向散射系数大于0.001 km-1?sr-1时,其频率在地面相对湿度为50%—65%时最大；低层大气中聚集的主要是规则气溶胶粒子,当地面相对湿度为65%—80%时,气溶胶粒子最为规则,其次为80%—95%的地面相对湿度时,当地面相对湿度为50%—65%时,不规则气溶胶粒子所占比重较大；霾期间细粒子气溶胶在不同地面相对湿度环境下的低层大气中均占主导地位,但随着地面相对湿度的增加,气溶胶粒子粒径逐渐增大,在地面相对湿度为80%—95%时,大颗粒气溶胶相对较多。 |
| 英文摘要: |
| Based on the onboard lidar data from CALIPSO satellite of National Aeronautics and Space Administration (NASA) from January 2007 to November 2010, the relationship between 0-2km altitude aerosol microphysical properties and surface relative humidity of lower troposphere during the haze in Shanghai were revealed by analyzing the parameters of 532nm total attenuated backscatter coefficient, volume depolarization ratio and total attenuated color ratio. The results showed that when the 532nm backscattering coefficient was in the range of 0 to 0.001 km-1?sr-1, the frequency of 532nm backscattering coefficient was the largest with the surface relative humidity was 65%-80%, while when the 532nm backscattering coefficient was greater than 0.001 km-1?sr-1, its frequency reached the maximum with the surface relative humidity was 50%-65%. The main constituents of lower troposphere were regular aerosols and the most regular aerosols appeared on the relative humidity was within 65%-80% while the most irregular aerosols appeared on the relative humidity was within 50%-65%. In addition, fine particle aerosols were the dominant aerosols of lower troposphere in the haze. With the increase of surface relative humidity, the aerosol particle size increased, and the proportion of large aerosols were highest when the surface relative humidity was within 80%-95%. |
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