跨光谱的地表参数对微波近地面通道正演模拟的影响分析  

Influence of surface parameters across spectrum on microwave near-surface channel forward modeling

作　　者：杨宗儒 白学志 马刚[2,3,4] 戴秋丹 张邦林 张鹏 YANG ZongRu;BAI XueZhi;MA Gang;DAI QiuDan;ZHANG BangLin;ZHANG Peng(College of Oceanography,Hohai University,Nanjing 210024,China;Center for Earth System Modeling and Prediction of China Meteorological Administration,Beijing 100081,China;Key Laboratory of Earth System Modeling and Prediction,China Meteorological Administration,Beijing 100081,China;State Key Laboratory of Severe Weather(LaSW),Chinese Academy of Meteorological Sciences,China Meteorological Administration,Beijing 100081,China;State Key Laboratory of Numerical Modelling for Atmospheric Sciences and Geophysical Fluid Dynamics,Institute of Atmospheric Physics,Chinese Academy of Sciences,Beijing 100029,China;Guangzhou Institute of Tropical and Marine Meteorology/Guangdong Provincial Key Laboratory of Regional Numerical Weather Prediction,China Meteorological Administration,Guangzhou 510641,China;National Satellite Meteorological Centre,China Meteorological Administration,Beijing 100081,China;Xu Jianmin Meteorological Satellite Innovation Center,China Meteorological Administration,Beijing 100081,China;Key Laboratory of Radiometric Calibration and Validation for Environmental Satellites,China Meteorological Administration,Beijing 100081,China)

机构地区：[1]河海大学海洋学院,南京210024 [2]中国气象局地球系统数值预报中心,北京100081 [3]中国气象局地球系统数值预报重点开放实验室,北京100081 [4]中国气象局中国气象科学研究院灾害天气国家重点实验室,北京100081 [5]中国科学院大气物理研究所大气科学与地球流体力学数值模拟国家重点实验室,北京100029 [6]中国气象局广州热带海洋气象研究所/广东省区域数值天气预报重点实验室,广州510641 [7]中国气象局国家卫星气象中心,北京100081 [8]中国气象局许建民气象卫星创新中心,北京100081 [9]中国气象局中国遥感卫星辐射测量和定标重点开放实验室,北京100081

出　　处：《地球物理学报》2023年第12期4875-4888,共14页Chinese Journal of Geophysics

基　　金：国家自然科学基金联合基金《面向超级城市群的百米尺度分辨率区域数值天气预报模式关键技术研究》(U2142213);国家重点基础研究发展计划(2018YFC1506701)共同资助。

摘　　要：获取与卫星观测同步的地表温度是全地形卫星近地面微波探测数据同化成功的关键所在.为了进一步提高在复杂下垫面上先进技术微波探测仪(Advanced Technology Microwave Sounder,ATMS)近地面通道正演模拟精度,针对ATMS原始数据(Sensor Data Record,SDR)与可见光/红外辐射计(Visible and Infra-Red Radiometer,VIRR)反演产品数据不能同步获取的问题,本文基于像元匹配技术实现了卫星序列间观测数据的交叉配对,利用跨光谱的反演地表温度作为正演ATMS陆面近地面通道的观测辐射的下边界参数,进而对正演辐射、基于ECMWF全球气候第五代大气再分析产品(the Fifth Generation ECMWF Reanalysis for the Global Climate and Weather,ERA5)地表温度的模拟值与典型下垫面探测数据开展了误差分析与验证,为下一步的ATMS陆面近地面通道的同化提供技术支撑.在FY-3D的红外高光谱大气垂直探测仪(Hyperspectral Infrared Atmospheric Sounder,HIRAS)像元与中分辨率光谱成像仪Ⅱ型(Medium Resolution Spectral Imager-Ⅱ,MERSI-Ⅱ)像元的匹配中,卷积可以使HIRAS通道加权平均的观测辐射与MERSI-Ⅱ辐射的偏差减小,平均误差约为0.28 K左右.昼间与夜间HIRAS卷积亮温与MERSI-Ⅱ通道亮温平均偏差和STD的时间演变趋势相当.FY-3D MERSI-Ⅱ像元与NOAA-20交叉轨道红外测深仪(Cross-track Infrared Sounder,CrIS)像元匹配时,中纬度极轨卫星序列间的像元匹配精度与全球天基相互校准系统(Global Space-based Inter-Calibration Sytem,GSICS)中极轨卫星与静止卫星在中低纬的匹配精度相当,匹配后窗区亮温的偏差都在0.1 K左右.表明GSICS中卫星间的像元匹配方法可以在更广泛的条件下使用.相对于ERA5地表温度,在沙漠区域MERSI-Ⅱ反演的地表温度与测站地表温度的偏差更小.MERSI-Ⅱ反演的地表温度模拟的亮温更能展示ATMS通道5亮温的真实情况.尽管基于红外观测反演的地表温度与基于微波观测�To obtain the land surface temperature synchronized with the satellite microwave observation is the key to successful assimilation of all-surface ground-based microwave radiometer data.In order to further improve the accuracy of ATMS near-surface channel forward simulation on complex underlying surfaces,and in view of the problem that ATMS SDR data and VIRR inversion product data cannot be synchronized,this paper realizes the cross-matching of observation data between satellite sequences based on pixel matching technology,and uses the inversion surface temperature across the spectrum as the lower boundary parameter of the observed radiation in the forward ATMS near-surface channel.Then,error analysis and verification were carried out on the forward radiation,simulation values based on ERA5 surface temperature,and typical underlying surface detection data,providing technical support for the assimilation of the ATMS near-surface channel in the next step.In the matching process of FY-3D HIRAS pixel and MERSI-Ⅱ pixel,convolution can reduce the deviation between the weighted average observed radiation of the HIRAS channel and the MERSI-Ⅱ radiation,and the average error is about 0.28 K.The temporal evolution trend of the average deviation and STD between the daytime and nighttime HIRAS convolved brightness temperature and MERSI-Ⅱ channel brightness temperature are quite similar.When matching FY-3D MERSI-Ⅱ pixel with NOAA-20 CrIS pixel,the pixel matching accuracy between mid-latitude and polar orbiting satellite sequences is comparable to the matching accuracy between polar orbiting satellites and geostationary satellites in mid-low latitudes in GSICS,and the deviation of the window-brightness temperature after matching is about 0.1 K.This indicates that the pixel matching method among satellites in GSICS can be used under more extensive conditions.Compared with ERA5 surface temperature,the deviation between the surface temperature inverted by MERSI-Ⅱ in desert areas and the surface temperature measured by the

关 键 词：像元匹配 地表参数 亮温正演 地表温度 

分 类 号：P412[天文地球—大气科学及气象学]