基于准对称混合滑动训练法对CLDAS气温的订正检验  

Correction and evaluation of CLDAS air temperature products based on quasi-symmetric hybrid sliding training method

作　　者：李奇临 刘超 朱君 刘昉 旷兰 LI Qilin;LIU Chao;ZHU Jun;LIU Fang;KUANG Lan(CMA Key Open Laboratory of Transforming Climate Resources to Economy,Chongqing Meteorological Information and Technical Support Center,Chongqing 401147,China;Chongqing Meteorological Observatory,Chongqing 401147,China;Qijiang Meteorological Bureau,Qijiang 401420,Chongqing,China)

机构地区：[1]中国气象局气候资源经济转化重点开放实验室,重庆市气象信息与技术保障中心,重庆401147 [2]重庆市气象台,重庆401147 [3]重庆市綦江区气象局,重庆綦江401420

出　　处：《干旱气象》2024年第2期305-314,共10页Journal of Arid Meteorology

基　　金：重庆市气象部门业务技术攻关项目“重庆气温网格实况产品的偏差订正与评估”(YWJSGG-202110)、“降水融合实况分析产品在重庆地区的订正”(YWJSGG-202307)共同资助。

摘　　要：基于准对称混合滑动训练期方法,对近两年来中国气象局陆面同化分析系统(CMA Land Data Assimilation System,CLDAS)输出的日最高气温、日最低气温网格实况分析产品进行订正,以期提高该产品在重庆地区的适用性。结果表明:订正前,2021年CLDAS日最高气温产品的平均误差为0.63℃,平均绝对误差为1.14℃,订正后平均误差减小至-0.03℃,平均绝对误差减小至0.64℃,误差小于或等于1℃的准确率由约64%提高到约90%,明显改善了该产品在重庆西部和东南部地区的适用性;订正前,2021年CLDAS日最低气温的平均误差为-0.22℃,平均绝对误差为0.75℃,订正后平均误差减小至-0.03℃,平均绝对误差减小至0.55℃,误差小于或等于1℃的准确率由约91%提高到约93%,改善了该产品在重庆中部地区的适用性。Based on the quasi-symmetric mixed sliding training period method,the grid analysis products of daily maximum tempera⁃ture and daily minimum temperature from Land Data Assimilation System of China Meteorological Administration(CLDAS)in recent two years are revised,in order to improve the applicability of the products in Chongqing.The results show that before revision,the aver⁃age error of daily maximum temperature products in 2021 was 0.63℃,and the average absolute error was 1.14℃.After revision,the average error decreased to-0.03℃,the average absolute error decreased to 0.64℃,the accuracy of error less than or equal to 1℃was improved from about 64%to 90%,which obviously improved the applicability of products in western and northeastern Chongqing.Be⁃fore revision,the average error of daily minimum temperature products in 2021 was-0.22℃,and the average absolute error was 0.75℃.After revision,the average error was reduced to-0.03℃,the average absolute error was reduced to 0.55℃,and the accuracy of error less than or equal to 1℃was improved from about 91%to 93%,which improved the applicability of products in central Chongqing.

关 键 词：偏差订正 准对称混合滑动训练 CLDAS 评估 

分 类 号：P456.7[天文地球—大气科学及气象学]