摘要
湿地系统对高影响天气敏感,分析宜昌湿地群暴雨、大风、高温和雷电特征及影响度,得出以下结论:(1)宜昌暴雨呈增多趋势,影响度小于0.5。隔河岩库区、熊渡库区、南河和泗洋河湿地自然保护区位于暴雨影响度相对大值区。(2)宜昌大风日数增多,均值为7.4 d,影响度小于0.4,大值区主要在沿江峡谷、高海拔地区和东部冷空气通道上。三峡库区、隔河岩库区、香溪河、湾潭河和漳河湿地自然保护区位于大风影响度大值区。(3)宜昌高温增多,均值为23.4 d。河谷、低山、东部平原以及城市化影响明显的地区高温影响度较高。香溪河、三峡库区、泗洋河、沮河、大溪库区、高坝洲库区和熊渡库区湿地自然保护区位于高温影响度大值区。(4)宜昌雷暴天数和时长均呈减少趋势,主要活动时间为6—8月,雷电流强度主要集中在10~50 kA,雷电影响度小于0.5。沮河、漳河、三峡库区、南河和熊渡库区湿地自然保护区位于雷电影响度相对大值区。
Wetland System is sensitive to high-impact weather.High-impact weather in Yichang is rainstorm,gale,high temperature and lightning.Characteristic and influence degree of high-impact weather are analyzed.The results show that:(1)The influence degree of rainstorm is less than 0.5,and increases from year to year.Geheyan reservoir,Xiongdu reservoir,Nanhe and Siyanghe wetland nature reserves have higher rainstorm influence degree.(2)It has 7.4 gale days per year,and the number shows increased trend.Valleys along the river,high altitude area and cold air channel on eastern plain have more gale days.Three Gorges reservoir,Geheyan reservoir,Xiangxi river,Wantan River and Zhanghe wetland nature reserve have higher gale influence degree.(3)It has 23.4 high temperature days per year,the number of high temperature days shows increased trend.Influence degree of high temperature mainly distributes in valleys,low mountains,eastern plains and areas with significant urbanization.Wetland nature reserves of Xiangxi river,Three Gorges reservoir,Siyang river,Juhe river,Daxi reservoir,Gaobazhou reservoir and Xiongdu reservoir have higher influence degree of high temperature.(4)Lightning days and hours decreases slowly,influence degree is less than 0.5.Wetland nature reserves of Juhe,Zhanghe,Three Gorges,Nanhe and Xiongdu reservoir have higher lightning influence degree.
作者
成勤
王清龙
罗剑琴
肖湛臻
张丽
陈鲜艳
CHENG Qin;WANG Qinglong;LUO Jianqin;XIAO Zhanzhen;ZHANG Li;CHEN Xianyan(Yichang Weather Bureau of Hubei Province,Yichang 443000,Hubei,China;National Climate Center,China Meteorological Administration,Beijing 100081,China)
出处
《水利水电技术（中英文）》
北大核心
2022年第S01期17-25,共9页
Water Resources and Hydropower Engineering
基金
水利部三峡局地气候监测(SK2021031)
中国气象局预报员专项(CMAYBY2020-084)
湖北省气象局科技发展基金项目(2020J02)
关键词
湿地群
高影响天气
暴雨
大风
高温
雷电
wetland groups
high-impact weather
rainstorm
gale
high temperature
lightning
