ERA-Interim及ERA5在中国西南复杂地形区的适用性对比分析  

Comparison of the Applicability between ERA-Interim and ERA5 Reanalysis in Complex Terrain Area of Southwest China

作　　者：刘佳[1,2] 陈艳 王曼 周秀美[1,2] LIU Jia;CHEN Yan;WANG Man;ZHOU Xiumei(Research Center for Disastrous Weather over Hengduan Mountains&Low-Latitude Plateau,CMA,Kunming 650034,China;Honghe Prefecture Meteorological Service,Honghe 661199,China;Meteorological Science Institute of Yunnan Province,Kunming 650034,China)

机构地区：[1]中国气象局横断山区(低纬高原)灾害性天气研究中心,昆明650034 [2]云南省红河州气象局,红河654400 [3]云南省气象科学研究所,昆明650034

出　　处：《高原山地气象研究》2023年第1期95-103,共9页Plateau and Mountain Meteorology Research

基　　金：国家自然科学基金项目(41965005);中国气象局创新发展专项(CXFZ2022J012)。

摘　　要：基于中国西南地区川、渝、滇、黔、藏、桂6个省区513个国家级气象观测站的观测实况资料,运用相关系数、泰勒图等方法对比分析了ERA-Interim和ERA5两套再分析数据在中国西南复杂地形区的适用性。结果表明:ERA5再分析数据对地面各要素(2 m气温、降水、10 m风速、10 m风向)的适用性均优于ERA-Interim,其在四川中部、云南东部等地对2 m气温的再现更优,在四川、重庆、贵州对降水的再现更优,在重庆、云南、广西对10 m风速的再现更优,在四川和广西对10 m风向的再现更优。而ERA-Interim仅在西藏地区对2 m气温、10 m风速的再现更优。在月适用性上,两套再分析资料在冬春季优于夏秋季,其中ERA5对夏秋季(5~10月)2 m气温和全年各月降水、10 m风速、10 m风向的适用性更优。在日适用性上,两套再分析资料对2 m气温和降水在午后到夜间优于白天,对10 m风速和10 m风向在白天的适用性优于午后到夜间,其中ERA5对多数时段2 m气温、00时降水以及各时次10 m风速、10 m风向具有更好的适用性。The applicability of ERA-Interim and ERA5 reanalysis in the complex terrain area of Southwest China is compared based on the observation data of 513 ground meteorological observation stations.The results show that the applicability of ERA5 reanalysis data about surface factors(2 m temperature,precipitation,10 m wind speed and 10 m wind direction)is superior to ERA-Interim,In particular,ERA5 can reproduce 2 m temperature better in Central Sichuan an Eastern Yunnan,reproduce precipitation better in Sichuan,Chongqing and Guizhou,can reproduce 10 m wind speed better in Chongqing,Yunnan and Guangxi,and reproduce 10 m wind direction better in Sichuan and Guangxi.It should be noted that ERA-Interim is more suitable for 2 m air temperature and 10 m wind speed in Tibet.In terms of monthly applicability,the applicabilty of the two sets of reanalysis data in winter and spring is better than that in summer and autumn.ERA5 has better applicabilty to 2 m air temperature in summer and autumn(May to October),monthly precipitation,10 m wind speed and 10 m wind direction of the year.In terms of daily applicability,the applicabilty of the two sets of reanalysis data to 2 m temperature and precipitation from afternoon to night is better than that in the daytime,and the applicabilty of 10 m wind speed and 10 m wind direction in the daytime is better than that in the afternoon to night.ERA5 is generally better than ERA-Interim for the simulation of 2 m air temperature,and precipitation at 00:00,10 m wind speed and 10 m wind direction in most periods.

关 键 词：西南地区 再分析数据 适用性 误差时空分布 

分 类 号：P456.7[天文地球—大气科学及气象学]