FY-3D总云量资料质量评估  

Assessment of FY-3D total cloud amount data

作　　者：刘杰 楚志刚[2] LIU Jie;CHU Zhigang(CMA Communication and Outreach Center,Beijing 100081,China;Nanjing University of Information Science and Technology,Nanjing 210044,China)

机构地区：[1]中国气象局气象宣传与科普中心,北京100081 [2]南京信息工程大学,南京210044

出　　处：《气象科学》2025年第1期130-135,共6页Journal of the Meteorological Sciences

基　　金：第二次青藏高原综合科学考察研究项目(2019QZKK0105);国家重点研发项目(2018YFC1506603)。

摘　　要：云量作为地球与大气系统能量平衡及水循环系统的重要影响因子,是气候及气候变化研究中的重要参数。而风云三号卫星反演的云量数据具有全球覆盖和高空间分辨率优势,成为非常有效的云量获取手段。通过对FY-3D/MERSIⅡ云量产品的精度进行定性和定量对比评估,证明FY-3D/MERSIⅡ总云量全球空间分布特征与EOS Aqua/MODIS具有很好的一致性。通过对二者进行相同时间、5 km距离的时空匹配原则进行配准,获得匹配样本进行定量精度评价,结果显示,FY-3D/MERSIⅡ反演的总云量和EOS Aqua/MODIS总云量产品在中低纬度质量相差不大,误差在-10%~10%,在两级地区FY-3D/MERSIⅡ总云量略高于EOS Aqua/MODIS,两极冷地表条件下云雪判识的误差是引起二者差异的主要原因。总体而言,二者的偏差小于9%,误差标准差小于20%。As an important factor affecting the energy balance and water circulation system of the earth and atmosphere system,cloud amount is an important parameter in the study of climate and climate change.The cloud amount data retrieved by Fengyun-3 satellite has the advantage of global coverage and high resolution and become a very important cloud data.In this study,the precision of FY-3D/MERSIⅡcloud amount data was given through comparison with EOS Aqua/MODIS cloud amount.It proved that the global spatial distribution pattern of FY-3D/MERSIⅡcloud amount is consistent with EOS Aqua/MODIS.The quantity comparison of two source of data shows that there is little difference in the middle and low latitudes with error between-10%and 10%.The error in the polar regions is relatively large and that mainly because of the cloud erroneous identification and ice-snow.In general,the bias between them is less than 9%,and the standard deviation of error is less than 20%.

关 键 词：FY-3D/MERSIⅡ 总云量 质量评估 

分 类 号：P412.27[天文地球—大气科学及气象学] P426.5