FY-2E地面太阳辐射反演及数据集评估

摘要

针对FY-2E地面入射太阳辐射反演精度不够精确的问题,提出使用ERA-Interim再分析资料的臭氧、大气可降水、地面气压等数据替换反演算法中气候态平均大气场,通过利用中国地区(2009-2014年)91个站点的地面观测数据验证和评估新旧数据集产品(SWDN-1.0和SWDN-2.0),并与CERES卫星反演SYN1deg产品和ERA-Interim再分析地面入射太阳辐射资料进行比较分析.结果表明:CERES卫星反演产品与观测最接近,FY-2E卫星反演产品次之,ERA-Interim地面入射太阳辐射产品误差最大;FY-2E卫星反演的2套产品,SWDN-2.0相比于SWDN-1.0有较大改进;4套数据产品在中国不同区域效果有明显差异,西部最好、南部最差,辐射反演算法还有待改进;从地面入射太阳辐射的多年平均值分析,4套数据产品之间有较好的一致性,FY-2E卫星反演地面入射太阳辐射数据集产品空间分辨更高,细节更清晰.%In view of the fact that the retrieval accuracy of FY-2E downward surface solar radiation is not accurate enough,this study presents replacing the average climatology atmospheric field of the inversion algorithm with the data of climatology ozone amount,atmospheric precipitable water,and surface pressure of ERA-Interim reanalysis data,examines and evaluates SWDN-1.0 and SWDN-2.0 using ground observation data(OBS)from 91 ground observation stations in China(from 2009 to 2014).It conducts comparison with CERES satellite-derived application and ERA-Interim reanalysis data.The results show that:CERES has the highest precision,FY-2E follows,ERA-Interim is the worst;SWDN-2.0 has a greater improvement than SWDN-1.0 when comparing the two sets of downward surface solar radiation data derived from FY-2E satellite;four sets of data show significantly different effects in different regions of China with the best in western China and the worst in southern China,and the radiation inversion algorithm could be improved;there is good consistency between the four sets of data,however the surface downward shortwave radiation data derived from FY-2E satellite is higher in spatial resolution and sharper in details.