文献类型：期刊文献

英文题名：Sichuan Rainfall Prediction Using an Analog Ensemble

作者：Lai, Pengyou[1,2];Yang, Jingtao[3];Liu, Lexi[1,4];Zhang, Yu[1];Sun, Zhaoxuan[5,6];Huang, Zhefan[7];Shao, Duanzhou[1];He, Linbin[8,9];Rigo, Tomeu;Havemann, Stephan

机构：[1]Guangdong Ocean Univ, Coll Ocean & Meteorol, Zhanjiang 524088, Peoples R China;[2]Sun Yat sen Univ, Sch Atmospher Sci, Zhuhai 519082, Peoples R China;[3]Guangdong Ocean Univ, Sch Math & Comp Sci, Zhanjiang 524088, Peoples R China;[4]Tianjin Univ, Georgia Tech Shenzhen Inst, Shenzhen 518055, Peoples R China;[5]Heavy Rain & Drought Flood Disasters Plateau & Bas, Chengdu 610072, Peoples R China;[6]Southwest Reg Climate Ctr, Sichuan Climate Ctr, Chengdu 610072, Peoples R China;[7]China Agr Univ, Coll Resources & Environm Sci, Beijing 100193, Peoples R China;[8]Chinese Acad Meteorol Sci, Beijing 100081, Peoples R China;[9]China Meteorol Adm, Inst Urban Meteorol, Beijing 100089, Peoples R China

年份：2023

卷号：14

期号：8

外文期刊名：ATMOSPHERE

收录：SCI-EXPANDED(收录号：WOS:001055748800001)、、EI(收录号：20233514647968)、Scopus(收录号：2-s2.0-85168798471)、WOS

基金：The authors are very grateful to the editor and anonymous reviewers for their help and recommendations.

语种：英文

外文关键词：precipitation forecast; analog ensemble; precipitation statistics; forecast correction

外文摘要：This study aimed to address the significant bias in 0-44-day precipitation forecasts under numerical weather conditions. To achieve this, we utilized observational data obtained from 156 surface stations in the Sichuan region and reanalysis grid data from the National Centers for Environmental Prediction Climate Forecast System Model version 2. Statistical analysis of the spatiotemporal characteristics of precipitation in Sichuan was conducted, followed by a correction experiment based on the Analog Ensemble algorithm for 0-44-day precipitation forecasts for different seasons in the Sichuan region. The results show that, in terms of spatial distribution, the precipitation amounts and precipitation days in Sichuan Province gradually decreased from east to west. Temporally, the highest number of precipitation days occurred in autumn, while the maximum precipitation amount was observed in summer. The Analog Ensemble algorithm effectively reduced the error in the model forecast results for different seasons in the Sichuan region. However, the correction effectiveness varied seasonally, primarily because of the differing performance of the AnEn method in relation to precipitation events of various magnitudes. Notably, the correction effect was the poorest for heavy-rain forecasts. In addition, the degree of improvement of the Analog Ensemble algorithm varied for different initial forecast times and forecast lead times. As the forecast lead time increased, the correction effect gradually weakened.