基于ETCCDI指数的1991—2021年辽宁省极端降水和气温特征分析  

Analysis of extreme precipitation and temperature characteristics in Liaoning province from 1991 to 2021 based on ETCCDI indices

作　　者：张婉莹[1] 孙秀博 林毅[1] 宋健 李冰 张萌萌 李嘉宁 吕家欣 ZHANG Wanying;SUN Xiubo;LIN Yi;SONG Jian;LI Bing;ZHANG Mengmeng;LI Jianing;LV Jiaxin(Meteorological Service Center in Liaoning Province,Shenyang 110166,China;Liaoning Meteorological Service,Shenyang 110001,China;Benxi Meteorological Service,Benxi 117000,China)

机构地区：[1]辽宁省气象服务中心,辽宁沈阳110166 [2]辽宁省气象局,辽宁沈阳110001 [3]本溪市气象局,辽宁本溪117000

出　　处：《气象与环境学报》2024年第4期72-79,共8页Journal of Meteorology and Environment

基　　金：辽宁省气象局开放基金项目“精细化表征夏季电力负荷的气象数据产品研发(202304)”;辽宁省气象局科研项目“基于ETCCDI指数的辽宁地区极端高温事件与东北亚环流关系研究”(202205);辽宁省气象局金融保险气象灾害风险减量关键技术青年创新团队项目共同资助;辽宁省气象服务中心能源气象与安全生产保障研究团队项目。

摘　　要：选用1991—2021年辽宁省60站气温和降水量逐日资料,计算国际气候变化监测和指标专家组定义的26个极端气候指数,分析近30 a辽宁省极端气候事件变化以及2021年极端降水和气温特征。结果表明:辽宁省单次极端冷(暖)事件平均强度增强,但发生频次减少,持续性极端事件发生频次减少;低温日数减少,生长期长度增长,热夜、夏日指数增大;极端降水量年代际变化为显著的先减小再增大。2021年辽宁省极端冷事件和暖事件均较常年偏冷,其中,极端冷事件为全省一致偏冷,暖事件为辽宁西部偏冷、东部偏暖;该年的生长期较往年偏长;总降水量和极端降水事件均偏多,持续湿润日数偏长,干旱日数偏短。Daily temperature and precipitation data from 60 stations in Liaoning province from 1991 to 2021 were used to calculate 26 extreme climate indices defined by the Expert Team on Climate Change Detection and Indices(ETCCDI).The changes in extreme climate events over the past 30 years and the characteristics of extreme precipitation and temperature in 2021 in Liaoning province were analyzed.The results showed that the average intensity of single extreme cold(warm)events in Liaoning province has increased,but their frequency has decreased,and the frequency of persistent extreme events has also decreased.The number of low-temperature days has decreased.The length of the growing season has increased,and the indices of warm nights and summer days have increased.Extreme precipitation amounts showed significant decadal variations from decrease to increase.In 2021,both extreme cold and warm events in Liaoning province were colder than normal,with extreme cold events being consistently colder across the province,while warm events were colder in western Liaoning province and warmer in the east.The growing season in 2021 was longer than in previous years.Total precipitation and extreme precipitation events were both above average,with prolonged wet periods and shortened dry spells.

关 键 词：气候变化 冷事件 暖事件 

分 类 号：P468.0[天文地球—大气科学及气象学]