A Limb Correction Method for the Microwave Temperature Sounder 2 and Its Applications  

作　　者：Xiaoxu TIAN Xiaolei ZOU Shengpeng YANG 

机构地区：[1]Earth Science System Interdisciplinary Center, University of Maryland, College Park [2]Joint Center for Data Assimilation Research and Applications, Nanjing University of Information Science and Technology

出　　处：《Advances in Atmospheric Sciences》2018年第12期1547-1552,共6页大气科学进展（英文版）

基　　金：supported by the National Natural Science Foundation of China (Grant No.91337218)

摘　　要：The Microwave Temperature Sounder 2(MWTS-2)is a cross-track radiometer that has 13 channels of sampling radiances emitted from different vertical levels of the atmosphere.Because of the varying scan angles of each field of view within a scan line,observations from the MWTS-2 are subject to strong scan-position-dependent features,i.e.,the limb effect.When examining brightness temperatures(TBs),weather signals observed at every temperature-sounding channel are often concealed by scan-dependent patterns.This study,therefore,proposes a limb correction method to remove scan-dependent features so that the underlying weather signals can be uncovered.Limb-corrected TBs can be used to monitor large-scale patterns over the globe as well as extreme weather events such as typhoons.Limb-corrected TBs are also more correlated with atmospheric physical variables such as temperature and liquid water path.The Microwave Temperature Sounder 2(MWTS-2)is a cross-track radiometer that has 13 channels of sampling radiances emitted from different vertical levels of the atmosphere.Because of the varying scan angles of each field of view within a scan line,observations from the MWTS-2 are subject to strong scan-position-dependent features,i.e.,the limb effect.When examining brightness temperatures(TBs),weather signals observed at every temperature-sounding channel are often concealed by scan-dependent patterns.This study,therefore,proposes a limb correction method to remove scan-dependent features so that the underlying weather signals can be uncovered.Limb-corrected TBs can be used to monitor large-scale patterns over the globe as well as extreme weather events such as typhoons.Limb-corrected TBs are also more correlated with atmospheric physical variables such as temperature and liquid water path.

关 键 词：MWTS-2 LIMB CORRECTION TROPICAL CYCLONES WEATHER monitoring 

分 类 号：P4[天文地球—大气科学及气象学]