大气与环境光学学报 ›› 2015, Vol. 10 ›› Issue (4): 323-332.

• “多尺度大气气溶胶综合观测实验”专辑 • 上一篇    下一篇

敦煌辐射校正场典型气溶胶垂直廓线的激光雷达观测

陈林1,王珍珠2, 胡秀清1,*,刘东2,伯广宇2,张鹏1   

  1. (1 国家卫星气象中心,北京 100081; 
    2 中国科学院安徽光学精密机械研究所中国科学院大气成分与光学重点实验室,安徽 合肥 230031 )
  • 收稿日期:2015-04-15 修回日期:2015-04-16 出版日期:2015-07-28 发布日期:2015-07-21
  • 通讯作者: 陈 林,(1981-),汉,浙江温州人,副研究员,博士,主要研究方向为气象卫星辐射定标、大气气溶胶卫星遥感及其气候效应研究。 E-mail:huxq@cma.gov.cn
  • 作者简介:陈 林,(1981-),汉,浙江温州人,副研究员,博士,主要研究方向为气象卫星辐射定标、大气气溶胶卫星遥感及其气候效应研究。
  • 基金资助:

    国家重点基础研究发展计划(973)项目(2010CB950802)、国家自然科学基金(41475031)资助

Vertical Profile of Atmospheric Aerosol Observed by Lidar in Dunhuang Radiometric Calibration Site

CHEN Lin1, WANG Zhengzhu2, HU Xiuqing1,*, LIU Dong2, BO Guangyu2, ZHANG Peng1   

  1. (1. National Satellite Meteorology Center, Beijing 100081, China; 
    2. Key Laboratory of Atmospheric Composition and Opticl Radition, Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Hefei 230031, China )
  • Received:2015-04-15 Revised:2015-04-16 Published:2015-07-28 Online:2015-07-21

摘要:

激光雷达可以获取气溶胶的三维信息。在2010年中国辐射校正场(Chinese Radiometric Calibration Site,CRCS2010)试验中,利用一部米散射激光雷达获取了敦煌辐射校正场区域15天的观测数据。利用经典的Fernald反演方法得到了这一区域的大气气溶胶消光系数垂直廓线并分析了其对辐射定标的影响。观测结果表明敦煌地区在从近地面到2~4 km处存在着一层气溶胶浓度高值层。用于辐亮度辐射定标的飞机飞行高度需要大于此高度,以避开气溶胶高浓度层的影响。并利用MODTRAN(MODerate resolution atmospheric TRANsmission))辐射模式中的气溶胶廓线与实测气溶胶廓线分别进行辐射模拟,对于FY3/MERSI各可见-近红外通道都有不同程度的差异,其中蓝通道(<500 nm)有4%~5%的辐射差异。

关键词: 激光雷达, 敦煌辐射校正场, 气溶胶垂直廓线, 辐射定标

Abstract:

Lidar can obtain three-dimensional aerosol information. In 2010, the Mie-scattering lidar was used to acquire the observation data for 15 days during the China Radiometric Calibration Site (CRCS2010) field experiment. Fernald inversion method was used to retrieve vertical profile of atmospheric aerosol extinction coefficient in this region. Its impacts on the radiometric calibration are analyzed. Observations results indicate that there is an aerosol layer of high concentration values from the near-surface layer to 2~4 km in Dunhuang area. The aircraft for radiometric calibration should fly above this altitude to avoid the effect of the high concentrations aerosol layer. On the basis of the aerosol profiles of MODTRAN(MODerate resolution atmospheric TRANsmission) radiative transfer model and the measured aerosol profiles, the radiation simulation was carried out respectively. The results showed that, different degrees of differences existed among FY3A/MERSI, all visible - near infrared channels, whereas the blue channels (<500 nm) had 4% ~ 5% of the radiation difference.

Key words: lidar, Chinese Radiometric Calibration Site in Dunhuang, vertical profile of atmospheric aerosol, radiometric calibration

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