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作 者:赵彤 赵梦凡 周秉荣[1,2] 申燕玲 王晗 ZHAO Tong;ZHAO Mengfan;ZHOU Bingrong;SHEN Yanling;WANG Han(Qinghai Academy of Meteorological Sciences,Xining 810001,China;Key Laboratory for Disaster Prevention and Mitigation in Qinghai,Xining 810001,China;Shandong Climate Center,Ji’nan 250031,China)
机构地区:[1]青海省气象科学研究所,青海西宁810001 [2]青海省防灾减灾重点实验室,青海西宁810001 [3]山东省气候中心,山东济南250031
出 处:《沙漠与绿洲气象》2023年第3期116-125,共10页Desert and Oasis Meteorology
基 金:中国科学院青海省人民政府三江源国家公园联合研究专项(LHZX-2020-08);中国气象局创新发展专项(CXFZ2021Z093);第二次青藏高原综合科学考察研究(2019QZKK020615)。
摘 要:基于青藏高原61个区域级气象站的气温降水地面观测数据,对CMFD(中国区域高分辨率地区驱动数据集)、CRA(全球大气和陆面再分析资料)以及MERRA-2(大气再分析资料)数据集的日、月、季节以及年气温、降水数据进行精度对比分析,评估3套数据的准确性以及在青藏高原的适用性,结果表明:(1)3套年平均气温资料70%的R_(MSE)<4℃,其中CMFD拟合精度最高,2/3的站点R_(MSE)<2℃;CMFD和CRA对年降水的拟合精度较高,MERRA-2低估了高原中部的年降水量。(2)CMFD对季节平均气温整体拟合结果最好,尤其是气温较高的夏季和秋季;CRA在降水较为集中的夏季和秋季拟合结果最接近观测值,而在降水较少的春季和冬季CMFD拟合结果最好。(3)CMFD对月平均气温拟合结果整体上最接近观测值;月降水拟合结果与季节降水结果相似,CMFD对降水偏少月份拟合结果较好,CRA在降水偏多月份最接近观测值。(4)对61个区域站进行日尺度平均气温和降水数据精度评估,发现CMFD和CRA拟合效果最好,CMFD拟合趋势一致性好。Based on the surface observation data of air temperature and precipitation from 61 regional meteorological stations on the Qinghai-Tibet Plateau,the accuracy of CMFD,CRA and MERRA-2data sets was compared and analyzed,and the accuracy and applicability of the three data sets were evaluated.The results showed that:(1)R_(MSE)of 70%of the three sets of annual mean temperature data was less than 4℃and less than 2℃in 2/3 of the stations,and the CMFD data had the highest fitting accuracy.CMFD and CRA showed higher fitting accuracy for annual precipitation,while MERRA-2 underestimated annual precipitation in the central plateau.(2)CMFD performed best in seasonal mean temperature fitting,especially in summer and autumn with higher temperature.In summer and autumn with more concentrated precipitation,the fitting results of CRA were the closest to the observed value,while the fitting results of CMFD were the best in spring and winter with less precipitation.(3)The fitting result of CMFD for monthly mean temperature was the closest to the observed value;CMFD performed better for the months with less precipitation,while CRA performed better for months with more precipitation.(4)The accuracy evaluation of daily scale mean temperature and precipitation data of 61 regional stations revealed that CMFD and CRA performed best,and the CMFD showed better fitting trend consistency.
分 类 号:P413[天文地球—大气科学及气象学]
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