用MFRSR仪器观测气溶胶光学厚度  

Observing aerosol optical depth with MFRSR

作　　者：王莉萍[1,2] 赵凤生[3] 李占清[4] 

机构地区：[1]中国气象科学研究院,北京100081 [2]国家气象中心,北京100081 [3]国家卫星气象中心,北京100081 [4]马里兰大学,马里兰美国21228

出　　处：《量子电子学报》2010年第2期234-241,共8页Chinese Journal of Quantum Electronics

基　　金：国家自然科学基金重点课题(40637035)

摘　　要：气溶胶对激光大气传输有着重要的影响。多光谱旋转遮蔽影带辐射计(MFRSR)是一种用于地基辐射和气溶胶测量的仪器。该仪器使用自动旋转影带技术同时在七个波段交替进行总的水平辐射和漫射水平辐射测量,然后推算得出直接辐射。其中6个波段的中心波长分别是414.3 nm,495.3 nm,613.7nm,671.5 nm,867.6 nm,939.3 nm,还有一个硅探测器进行宽波段太阳总辐射测量。介绍了MFRSR仪器及其定标和资料处理方法,利用香河观测站2004～2005年MFRSR观测资料,分析了气溶胶的统计特性。为了说明利用MFRSR观测气溶胶光学厚度的可靠性,将MFRSR与AERONET的观测结果进行了比较,结果表明二者在500 nm、670 nm和870 nm三个波段的平均偏差分别为-0.021,-0.009,-0.004;标准差分别为0.067,0.051,0.050。文中还对造成二者偏差的原因进行了讨论。Multi-filter rotating shadow-band radiometer（MFRSR） is a ground-based instrument and it is used to measure irradiance and aerosol.It uses automated rotating shadow-band technique to alternatively measure total horizontal and diffuse horizontal irradiances at seven wavelengths simultaneously,and then deduce direct normal irradiance.In addition to broadband silicon detector for measurement of total solar irradiance,center wavelengths of the other six wave bands are 414.3 nm,495.3 nm,613.7 nm,671.5 nm, 867.6 nm and 939.3 nm.The instrumentation,the method of calibration and data processing are introduced, and then statistical properties of aerosol are analyzed using observation of MFRSR during 2004～2005 in Xianghe,Hebei.In order to illuminate the reliability of observed aerosol optical depth with MFRSR,the results of MFRSR and AERONET data are compared.It shows the mean differences of the two results respectively are -0.021,-0.009,-0.004 at the wavelengths of 500 nm,670 nm,870 nm,and the standard deviations are 0.067,0.051,0.050.The reasons of deviation of the two method are also disscussed.

关 键 词：大气光学 多光谱旋转遮蔽影带辐射计 定标 气溶胶光学厚度 

分 类 号：O433[机械工程—光学工程]