基于ERA5再分析资料的昆明市水汽输送特征分析  

Analysis on water vapor transport characteristics in Kunming City based on ERA5 reanalysis data

作　　者：李琳静 邓丽仙 李明远[1,2] 金卓 郭财秀 刘磊 LI Linjing;DENG Lixian;LI Mingyuan;JIN Zhuo;GUO Caixiu;LIU Lei(Dianchi Lake Ecosystem Observation and Research Station of Yunnan Province,Kunming 650228,China;Kunming Branch of Yunnan Hydrology and Water Resources Bureau,Kunming 650106,China;Qujing Branch of Yunnan Hydrology and Water Resources Bureau,Qujing 655000,China)

机构地区：[1]滇池湖泊生态系统云南省野外科学观测研究站,云南昆明650228 [2]云南省水文水资源局昆明分局,云南昆明650106 [3]云南省水文水资源局曲靖分局,云南曲靖655000

出　　处：《水利水电快报》2025年第4期11-16,26,共7页Express Water Resources & Hydropower Information

基　　金：野外科学观测研究站建设专项(202305AM340008)。

摘　　要：为厘清昆明市水汽来源及输送路径,基于1980~2022年ERA5再分析资料,分析了年、季节尺度下昆明市水汽输送特征。结果表明:在年尺度下,昆明市水汽输送强度在空间上呈南强北弱的特点,东南部石林彝族自治县、宜良县水汽输送强度最强,北部东川区最弱。昆明市春季和秋季的水汽主要来源于孟加拉湾北部及南海西部的两支水汽输送带;夏季水汽仅受孟加拉湾水汽输送带影响,水汽输送强度明显弱于其他季节,此时昆明市上空水汽均呈辐合状态,水汽主要汇集在西部禄劝彝族苗族自治县局部地区;冬季水汽来源以中纬度的西风水汽输送带为主,西太平洋南海水汽带为辅,此时昆明市大部地区呈水汽辐散特征,且在东北-西南地区上空存在一条明显的水汽辐散带。In order to clarify the source and transport path of water vapor in Kunming City based on the ERA5 reanalysis data from 1980 to 2022,the characteristics of water vapor transport at annual and seasonal scales were analyzed.The results showed that at the annual scale,the intensity of water vapor transport in Kunming City was spatially strong in the south and weak in the north.The intensity of water vapor transport in Shilin County and Yiliang County in the southeast was the strongest,and that in Dongchuan District in the north was the weakest.The water vapor of Kunming in spring and autumn mainly came from two water vapor transport belts in the northern part of Bengal Bay and the western part of the South China sea.In summer,the water vapor was only affected by the water vapor conveyor belt in the Bengal Bay,and the water vapor transport intensity was significantly weaker than that in other seasons.At this time,the water vapor over Kunming City was in a state of convergence,and the water vapor was mainly concentrated in the local area of Luquan County in the west.In winter,the water vapor source was dominated by the westerly water vapor transport belt in the middle latitudes,supplemented by the water vapor belt in the western Pacific South China sea.At this time,most of Kunming City was characterized by water vapor divergence,and there was an obvious water vapor divergence zone over the northeast-southwest region.The research results can provide a reference for the allocation and utilization of water resources and flood control and drought relief in Kunming City.

关 键 词：水汽输送 ERA5再分析资料 水汽辐合 水汽辐散 昆明市 

分 类 号：P461[天文地球—大气科学及气象学]