Intercomparison between aerosol optical properties by a PREDE skyradiometer and CIMEL sunphotometer over Beijing, China
Intercomparison between aerosol optical properties by a PREDE skyradiometer and CIMEL sunphotometer over Beijing, China
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DOI：
10.5194/acp-8-3199-2008
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发表时间：
2008-01-01
影响因子：
6.3
通讯作者：
Zhang, X.
中科院分区：
文献类型：
--
作者：
Che, H.;Shi, G.;Zhang, X.
本文比较了天网PREDE天文辐射计和AERONET/PHOTONS CIMEL太阳光度计在北京中国地区同时测量的气溶胶光学和物理性质。比较了气溶胶光学厚度(AOD)、Angstrom指数(α)、体积尺寸分布、单次散射反照率(Omega)和复折射率等气溶胶光学性质。对于670 nm以下的单次散射反照率，两种仪器的AOD差值小于1.3%，单次散射反照率差值小于4%。利用MODIS卫星资料、焦散度计测量结果、PM10测量结果和反轨迹分析方法，对北京地区三种不同天气条件(背景、灰霾和沙尘日数)下的AOP进行了对比分析。结果表明，在不同的天气条件下，北京地区背景、灰霾和沙尘天气条件下AOP的显著差异可能是由于不同的气溶胶成分造成的。
This study compares the aerosol optical and physical properties simultaneously measured by a SKYNET PREDE skyradiometer and AERONET/PHOTONS CIMEL sunphotometer at a location in Beijing, China. Aerosol optical properties (AOP) including the Aerosol Optical Depth (AOD), Angstrom exponent (alpha), volume size distribution, single scattering albedo (omega) and the complex refractive index were compared. The difference between the two types of instruments was less than 1.3% for the AOD and less than 4% for the single scattering albedo below the wavelength of 670 nm. There is a difference between the volume size distribution patterns derived from two instruments, which is probably due to difference of measurement protocols and inversion algorithms for the respective instruments.AOP under three distinct weather conditions (background, haze, and dust days) over Beijing were compared by using the retrieved skyradiometer and sunphotometer data combined with MODIS satellite results, pyranometer measurements, PM10 measurements, and backtrajectory analysis. The results show that the significant difference of AOP under background, haze, and dust days over Beijing is probably due to different aerosol components under distinct weather conditions.