高分辨率气象格点融合产品在河南省的适用性分析  

Applicability Analysis of High-resolution Meteorological Grid Fusion Products in Henan Province

作　　者：程凯琪 魏璐 张凡 李伊吟 CHENG Kaiqi;WEI Lu;ZHANG Fan;LI Yiyin(Henan Key Laboratory of Agrometeorological Support and Applied Technique,CMA,Zhengzhou 450003,China;Henan Meteorological Service Center,Zhengzhou 450003,China;Weather Modification Center of Henan Province,Zhengzhou 450003,China)

机构地区：[1]中国气象局河南省农业气象保障与应用技术重点开放实验室,郑州450003 [2]河南省气象服务中心,郑州450003 [3]河南省人工影响天气中心,郑州450003

出　　处：《河南科学》2023年第8期1118-1126,共9页Henan Science

基　　金：中国气象局/河南省农业气象保障与应用技术重点实验室应用技术研究基金(KQ202320);国网河南省电力公司科技项目(52170220009R)。

摘　　要：以河南省国家气象站和区域站观测数据为标准,对2020年12月—2021年11月河南高分辨率气象要素逐时距地面2 m温度、24 h累积降水二源及多源格点融合产品,进行误差、均方根误差、相关系数的时间分布和空间分布等检验,同时也对二源和多源融合降水产品在极端暴雨中的适用性进行了评估.结果显示:①2 m温度格点融合产品比站点观测温度整体偏暖,平均误差-0.015~0.005℃,整体偏差较小,数据比较准确.②二源和多源融合降水产品逐日平均误差-2.5~0.5 mm,大部分时次0.5 mm左右,降水量级较小时误差较小,但特大暴雨量级(250 mm以上)降水时,两种格点融合降水产品对降水有一定的低估,偏差可达50 mm以上.相对而言,多源格点融合降水的准确性优于二源格点融合降水.Based on the observation data of Henan National Meteorological Station and regional station,the hourly temperature of 2 m above ground and the 24-hour cumulative precipitation products of two-source and multi-source fusion of high-resolution meteorological elements in Henan from December 2020 to November 2021 are tested,about the error,root-mean-square deviation,time distribution and spatial distribution of correlation coefficient.And the applicability of two source and multi-source fusion precipitation products in extreme rainstorm is also evaluated.The conclusions are as follows:①The temperature of the 2 m temperature grid fusion product was generally warmer than the observed temperature at the site,and the average error was between-0.015-0.005℃.The overall deviation was small and the data were more accurate.②The average daily error distribution of two-source and multi-source precipitation fusion products ranged from-2.5-0.5 mm,and mostly about 0.5 mm.When the precipitation level was small,the error was also small.However,for the heavy rainstorm magnitude(more than 250 mm),the two fusion precipitation products underestimated the heavy rainstorm to a certain extent,with a deviation of more than 50 mm.Relatively speaking,the accuracy of multi-source grid fusion precipitation is better than that of two-source grid fusion precipitation.

关 键 词：格点融合产品 质量评估 极端降水 高分辨率气象要素 

分 类 号：P412.1[天文地球—大气科学及气象学]