祁连山区再分析降水数据的适用性分析  

Applicability analysis of reanalysis precipitation data in the Qilian Mountains

作　　者：任婧[1,2] 张文煜 黄颖 毛文茜[2,3,4] 张珂铨 寇梦刚 REN Jing;ZHANG Wen-yu;HUANG Ying;MAO Wen-qian;ZHANG Ke-quan;KOU Meng-gang(College of Computer and Artificial Intelligence,School of Geoscience and Technology,Zhengzhou University,Zhengzhou 450001,China;Key Open Laboratory of Cloud Physical Environment of China Meterological Administration,Beijing 100081,China;College of Atmospheric Sciences,College of Management,Lanzhou University,Lanzhou 730000,China;College of Resources and Environmental Sciences,Gansu Agricultural University,Lanzhou 730070,China)

机构地区：[1]郑州大学计算机与人工智能学院,地球科学与技术学院,郑州450001 [2]中国气象局云雾物理环境重点开放实验室,北京100081 [3]兰州大学大气科学学院,管理学院,兰州730000 [4]甘肃农业大学资源与环境学院,兰州730070

出　　处：《兰州大学学报（自然科学版）》2023年第1期23-28,共6页Journal of Lanzhou University(Natural Sciences)

基　　金：中国气象局西北区域人工影响天气能力建设项目(ZQC-R18208);第二次青藏高原综合科学考察研究项目(2019Q ZKK0104)。

摘　　要：利用2019-2020年祁连山区241个观测站的小时降水量数据,对MERRA2降水量数据在祁连山区的适用性进行评估.结果表明,研究区MERRA2降水量数据与观测降水量数据的平均偏差为-1.50~0.62 mm,依据MERRA2数据分析的降水量变化基本反映了祁连山区降水量的分布和变化特征.研究区内北坡地区MERRA2降水量的日均值为9.2 mm,平均偏差-0.65 mm,均方根误差0.50 mm;山脊地区MERRA2降水量的日均值为13.8 mm,平均偏差-0.80 mm,均方根误差0.63 mm;南坡地区MERRA2降水量的日均值为10.6 mm,平均偏差-0.61 mm,均方根误差0.37 mm.MERRA2降水量数据在整个祁连山区的平均偏差为-0.69 mm,相对观测值表现出低估,随着观测站点海拔的升高,MERRA2降水量数据的模拟和同化精度也随之下降.Based on the hourly precipitation data of 241 observation stations in the Qilian Mountain areas from 2019 to 2020,the applicability of MERRA2 precipitation data in there were evaluated via the statistical analysis method.The results showed that the deviation range between MERRA2 precipitation data and observation data in the study area was-1.50~0.62 mm,and the precipitation change analyzed by MERRA2 precipitation data basically reflected the distribution and change characteristics of precipitation in the Qilian Mountain areas.The daily mean precipitation of MERRA2 on the north slope of the study area was 9.2mm,the deviation-0.65 mm,and the standard deviation 0.50 mm;the daily mean precipitation of MERRA2 in the ridge area was 13.8 mm,the deviation-0.80 mm and the standard deviation 0.63 mm;the daily mean precipitation of MERRA2 in the south slope area was 10.6 mm,the deviation-0.61 mm and the standard deviation 0.37 mm;the deviation of MERRA2 precipitation data in the whole Qilian Mountains was-0.69 mm;the MERRA2 precipitation data was underestimated relative to the observed values.With the increase in the altitude of the observation station,the simulation and assimilation accuracy of MERRA2 precipitation data also decreased.

关 键 词：祁连山 降水量 再分析数据 站点数据 适用性分析 

分 类 号：P426.61[天文地球—大气科学及气象学]