云顶高度对紫外辐射反演臭氧总量的影响  

Effect of the Cloud-Top Height on Back-Scattered Ultraviolet Radiation Measuring Total Ozone

作　　者：江芳[1] 王咏梅[1] 张晓庆[2] 

机构地区：[1]中国科学院空间科学与应用研究中心,北京100190 [2]中国科学院大气物理研究所,北京100029

出　　处：《高原气象》2009年第3期647-651,共5页Plateau Meteorology

基　　金：风云三号卫星应用系统工程建设项目;国家自然科学基金项目(40474051)共同资助

摘　　要：云顶高度是紫外后向散射反演臭氧总量算法的重要参数。利用模拟计算,对云顶高度误差引起的与臭氧反演相关的误差,即内插误差,云上臭氧误差以及云下臭氧误差进行了分析比较,结果表明:相对内插误差,云上臭氧误差和云下臭氧误差比较大,且两者不能抵消,反而总是相互叠加在一起。当假设的云顶高度比真实值高,两种误差相加使得反演值比真实值偏高;若假设的云顶高度比真实值低,两种误差相加使得反演值比真实值偏低。在本文假设条件成立的基础上,臭氧反演误差在10%^-20%之间分布。对2003年7月30日低纬地区的EPTOMS(Earth Probe Total Ozone MappingSpectrometer)云天实测资料反演的结果与理论计算的结果相一致。Cloud-top height is one of the most important parameters in the retrieval algorithm by backscattered ultraviolet radiation measuring total ozone. On the basis of model simulating calculation the paper studies and discusses retrieval errors of total ozone due to cloud-top-height-induced errors. The errors are radiation interpolation error, retrieval error above and below cloud, respectively. Comparing with radiation interpolation error, the later two errors are larger and they couldn＇t cancel each other, which will induce larger errors. When the assumed cloud-top-height is lower than the actual one, the retrieval value of total ozone is lower than the true one, when the assumed cloud-top-height is higher than the actual one, the retrieval value of total ozone is higher than the true one. On the basis of the assumed conditions in the paper, the error of total ozone retrieved is distributed between 10% - 20%. Furthermore, EPTOMS （Earth Probe Total Ozone Mapping Spectrometer） measurement data in low latitude field on 30th July 2003 is retrieved and the results obtained are consistent to the results of model simulating calculation.

关 键 词：大气臭氧总量 紫外后向散射 云顶高度 下垫面有效反照率 下垫面有效气压 

分 类 号：P422.62[天文地球—大气科学及气象学]