###
DOI:
本文二维码信息
从FY4A卫星遥测数据和GFS资料估算全天空状况下的地表长波辐射通量
闵敏1, 吴晓2,3
(1.中山大学大气科学学院;2.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;3.国家卫星气象中心)
Estimating surface longwave radiation fluxes under all-sky conditions from FY4A and GFS data
摘要
相似文献
本文已被:浏览 50次   下载 8
投稿时间:2018-11-14    修订日期:2019-08-14
中文摘要: 文章介绍利用FY4A成像仪遥感数据、GFS(全球预报系统)资料估算全天空地表长波辐射通量的方法,包括通过辐射传输模拟和统计回归建立云天地表下行长波辐射通量密度的反演模式,以及利用GFS资料处理云覆盖地区的地表上、下行长波辐射通量的计算方法。全天空状况下两种通量的反演结合了FY4A晴空地表长波辐射业务产品、和应用本文模式处理的云天地表上、下行长波辐射通量。2018年9月1日的处理结果与Aqua/CERES同类产品相对比,精度为:RMSE=20.52W/m2, R=0.9481, Bias=3.3W/m2(夜间地表下行通量对比);RMSE=25.58W/m2, R=0.9096, Bias=5.4W/m2(白天地表下行通量对比);RMSE=10.97W/m2, R=0.9762, Bias=-3.3W/m2(夜间地表上行通量对比);RMSE=19.97W/m2, R=0.9283, Bias=5.0W/m2(白天地表上行通量对比)。结果表明该模式能够反演出精度较好的云天长波辐射通量资料,为今后利用FY4后续星处理生成全天空状况下的地表长波辐射通量产品奠定了理论基础。
Abstract:In this study, the specific methods of estimating surface longwave radiation fluxes under all-sky condition are elucidated. An inverse model for cloudy-sky surface downward longwave radiation (DLR) flux retrieval was developed based on infrared radiative transfer calculation, statistical regression analysis of simulated data, and atmospheric profiles. After that, we combine the inverse model and GFS data to calculate FY4A clean-sky and cloudy-sky DLR values. Then, on the basis of the Aqua/CERES global DLR product, it validates the corresponding product of FY4A during day or night time. The final results show: RMSE=20.52W/m2, R=0.9481,BIAS=3.3W/m2 (nighttime); RMSE=25.58W/m2,R=0.9096,BIAS=5.4W/m2 (daytime). Besides, we also successfully calculate the cloudy-sky upwelling longwave radiation (ULR) product at the surface, which is combined with the operational FY4A clear-sky ULR product to make a joint all-sky product. The validations of FY4A all-sky ULR show: RMSE=10.97W/m2,R=0.9762,BIAS=-3.3W/m2 (nighttime); RMSE=19.97W/m2, R=0.9283,BIAS=5.0W/m2 (daytime). The validation results mentioned-above indicate the retrieval methods developed in this investigation are feasible and high-quality, which will be used for retrieving new operational DLR/ULR products for FY4 series satellites in future.
文章编号:201811140500     中图分类号:    文献标志码:
基金项目:非基金资助
引用文本:
闵敏,吴晓,0.[en_title][J].Meteor Mon,():-.
min min,Wu xiao,0.Estimating surface longwave radiation fluxes under all-sky conditions from FY4A and GFS data[J].Meteor Mon,():-.