基于微波辐射计和探空的FY-4A温度廓线检验  

Accuracy Validation of FY-4A Temperature Profile Based on Microwave Radiometer and Radiosonde

作　　者：王洪 周后福[3,4] 王琛 夏一楠 Wang Hong;Zhou Houfu;Wang Chen;Xia Yinan(Key Laboratory for Meteorological Disaster Prevention and Mitigation of Shandong,Jinan 250031;Shandong Weather Modification Office,Jinan 250031;Anhui Institute of Meteorological Sciences,Hefei 230031;Anhui Key Laboratory of Atmospheric Science and Satellite Remote Sensing,Hefei 230031;Zhangqiu Meteorological Bureau of Shandong Province,Jinan 250200)

机构地区：[1]山东省气象防灾减灾重点实验室,济南250031 [2]山东省人民政府人工影响天气办公室,济南250031 [3]安徽省气象科学研究所,合肥230031 [4]大气科学与卫星遥感安徽省重点实验室,合肥230031 [5]山东省济南市章丘区气象局,济南250200

出　　处：《应用气象学报》2023年第3期295-308,共14页Journal of Applied Meteorological Science

基　　金：山东省自然科学基金项目(ZR2020MD054);华东区域气象科技协同创新基金合作项目(QYHZ202103);山东省气象局重点项目(2022sdqxz10,2020sdqxz08);中国气象局创新发展专项(CXFZ2022J034)。

摘　　要：选取2021年1月1日—2022年3月31日山东济南地区探空、微波辐射计和FY-4A的温度廓线,评估FY-4A温度廓线偏差特征。结果表明:10 km以下,FY-4A温度比探空偏小0.51℃,两者偏差的标准差为0.50℃;FY-4A温度比微波辐射计偏大0.53℃,两者偏差的标准差为0.75℃。FY-4A与探空在00:00(世界时,下同)和12:00的温度偏差趋势一致;相对于00:00,12:00的FY-4A与探空温度偏差的离散程度较小。有降水时,600 m高度以上微波辐射计与FY-4A的温度偏差逐渐增大,在1500 m高度附近偏差达到最大值(约为9.35℃),在3000~8500 m高度内偏差为1.35~5.10℃,偏差的标准差为1.41~4.99℃。有降水时,FY-4A与探空的温度偏差和标准差在不同高度上不同,偏差变化范围为-0.31~3.60℃。有云时,微波辐射计与FY-4A的温度偏差为-0.40℃,偏差的标准差为3.79℃;探空与FY-4A的温度偏差为0.31℃,偏差的标准差为2.66℃。相对于有云时,晴空背景下FY-4A与另外两种设备的温度偏差和标准差均较小。To take full advantage of FY-4A temperature profile data to understand the evolutions of weather processes and nowcasting,based on the atmospheric temperature profile of radiosonde,microwave radiometer and FY-4A satellite from 1 January 2021 to 31 March 2022,897 samples are matched and their deviation characteristics are evaluated.The results show that the correlation coefficient between FY-4A satellite temperature and that of microwave radiometer is 0.9891,and the correlation coefficient between FY-4A satellite temperature and that of radiosonde is 0.9820.The mean temperature of FY-4A satellite is 0.51℃smaller than that of the radiosonde below 10 km height,and the standard deviation is 0.50℃.The mean temperature of FY-4A satellite is 0.53℃larger than that of the microwave radiometer below 10 km,and the standard deviation is 0.75℃.FY-4A temperature is consistent with the mean deviation trend of the radiosonde at 0000 UTC and 1200 UTC.Compared with 0000 UTC,the deviation sample of FY-4A at 1200 UTC is less discrete.When there is precipitation,the temperature deviation of microwave radiometer and FY-4A gradually increases above 600 m height,and the deviation reaches the maximum(about 9.35℃)near 1500 m height.In the range of 3000-8500 m height,the deviation ranges from 1.35℃to 5.10℃,and the standard deviation ranges from 1.41℃to 4.99℃.In the case of precipitation,the deviation values and standard deviations of FY-4A temperature and radiosonde are small.Although the deviation values and standard deviations of FY-4A temperature and radiosonde are different at different heights in the whole layer,the deviation is between-0.31 and 3.60℃.When there are clouds,the mean deviation between FY-4A temperature and that of microwave radiometer is-0.40℃,and the mean standard deviation is 3.79℃.The overall mean deviation between FY-4A temperature and radiosonde is 0.31℃,and the mean standard deviation is 2.66℃.Both the deviation and standard deviation between FY-4A temperature and that of microwave radi

关 键 词：FY-4A 微波辐射计 探空 温度廓线 偏差特征 

分 类 号：P407.7[天文地球—大气科学及气象学]