Performance of Kilometer-Scale CARAS Precipitation Product Against Ground-based Observations During 2008-2021 over Hubei,China

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外文摘要：Based on rain gauge data during 2008-2021 from national meteorological observation stations,this study investigated the performance of the precipitation field from the 1-km-resolution version of the China Atmospheric Re-altime Analysis(CARAS)over Hubei from the perspective of climatology,multiple-time scale variations,as well as fusion accuracy and detection capability at multiple temporal scales.The results show that CARAS precipitation can reproduce the spatial distribution patterns of climatological seasonal precipitation and rainy days well over the whole of Hubei compared with observational(OBS)precipitation,albeit deviations exist between CARAS and OBS in terms of magnitude.Moreover,high correlation and consistency between CARAS and OBS can be found in multiple-time scale variations over Hubei,with correlation coefficients of interannual,seasonal,and diurnal variation generally exceeding 0.85,0.98,and 0.95,respectively.Furthermore,CARAS has a relatively higher fusion accuracy in summer and winter,and stronger/weaker detection capability in spring/winter at a daily scale.However,the detection capability of CARAS at an hourly scale is weaker than that at a daily scale.With different precipitation intensity levels considered,CARAS daily precipitation shows relatively higher fusion accuracy in estimating moderate and heavy rain,and better detection capability in capturing no rain events.The variations of accuracy metrics and detection metrics under different precipitation intensities at an hourly scale generally resemble those at a daily scale.However,CARAS precipitation at an hourly scale shows a relatively lower fusion accuracy and weaker detection capability compared with that at a daily scale.This paper provides an insight into the characteristics of systematic deviations in CARAS precipitation over Hubei,which will benefit relevant applications of CARAS in meteorological operations over Hubei and the improvement of CARAS in the future.

外文关键词：

China Atmospheric Realtime Analysiskilometer-scale precipitationclimatologymultiple-time scale variationsaccuracy and detection capability

作者：

祝传栋、李矜霄、李马军、何飞、成驰、陈宇、陈城、廖洁

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作者单位：

Hubei Meteorological Service Center,Wuhan 430205 China

China Meteorological Administration Basin Heavy Rainfall Key Laboratory/Hubei Key Laboratory for Heavy Rain Monitoring and Warning Research,Institute of Heavy Rain,China Meteorological Administration,Wuhan 430205 China

Shanghai Investigation,Design and Research Institute Co.,Ltd.,Shanghai 200335 China

Lancang Jingmai Airport of Yunnan Airport Group Limited Liability Company,Puer,Yunnan 665600 China

Public Meteorological Service Center,China Meteorological Administration,Beijing 100081 China

Hubei Meteorological Society,Wuhan 430074 China

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出版年：

2024

DOI：

10.3724/j.1006-8775.2024.036

热带气象学报(英文版)

中国气象局广州热带海洋气象研究所

热带气象学报(英文版)

影响因子：0.169

ISSN：1006-8775

年,卷(期)：2024.30(4)