FY-4A气象卫星LST L2级产品地面检验  

Ground Calibration of LST L2 Products of FY-4A Meteorological Satellite

作　　者：刘志刚 刘昊野 邵长亮[1,2,4] 刘聪[1,2,4] 杨佳 包玉龙 LIU Zhigang;LIU Haoye;SHAO Changliang;LIU Cong;YANG Jia;BAO Yulong(Key Laboratory of Atmosphere Sounding,CMA,Chengdu 610000,China;Research Centre on Meteorological Observation Engineering Technology,CMA,Chengdu 610000,China;Qinhuangdao Meteorological Bureau,Qinhuangdao,Hebei 066000,China;CMA Meteorological Observation Centre,Beijing 100081,China)

机构地区：[1]中国气象局大气探测重点开放实验室,成都610000 [2]中国气象局气象探测工程技术研究中心,成都610000 [3]秦皇岛市气象局,河北秦皇岛066000 [4]中国气象局气象探测中心,北京100081

出　　处：《遥感信息》2023年第4期12-23,共12页Remote Sensing Information

基　　金：中国气象局大气探测重点开放实验室和中国气象局气象探测工程技术研究中心联合基金开放课题(U2021M02)。

摘　　要：为了检验FY-4A气象卫星陆表温度(land surface temperature,LST)L2级产品数据的精度及可用性,对2019年FY-4A卫星逐分钟全圆盘及中国区反演的LST产品(Ta),与全国区域(除台湾省)3300多个气象观测站观测时间差±120 sec之内的地面温度(Tg)和草面(雪面)温度(Ts)进行标准差对比与相关性分析。结果表明:FY-4A反演的LST产品与地面气象站观测结果一致,产品平均标准偏差为5.64℃和5.30℃,数据平均相关性0.9111和0.9048,能够准确反映我国各地LST的时空分布特征。对于像元(4 km×4 km)内下垫面,反演的LST与地面温度和草面地温的相关性高度一致,(Ta-Tg)与(Ta-Ts)存在显著线性正相关关系,且相关系数稳定。In order to verify the accuracy and availability of the land surface temperature(LST)product data of FY-4A meteorological satellite,this study compares and analyzes the standard deviation of the LST product(Ta)retrieved by FY-4A satellite in 2019,China with the ground temperature(Tg)and grass surface(snow surface)temperature(Ts)within±120 seconds of the observation time difference of more than 3300 meteorological observation stations in the country(except Taiwan province).The results show that the LST products retrieved by FY-4A are consistent with the observation results of surface meteorological stations.The average standard deviation of the products is 5.64℃ and 5.30℃,and the average correlation of the data is 0.9111 and 0.9048,which can accurately reflect the spatial-temporal distribution characteristics of LST in various parts of China.For pixels(4 km×4 km)on the underlying surface within,the correlation between the retrieved LST and the ground temperature and grass surface ground temperature is highly consistent,and there is a significant linear positive correlation between(Ta-Tg)and(Ta-Ts),and the correlation coefficient is stable.

关 键 词：FY-4A 气象卫星 陆表温度 地面温度 草面温度 平均标准偏差 数据相关性 

分 类 号：P407.6[天文地球—大气科学及气象学]