1980~2017年四川盆地寒潮及其气温变化特征  

Temperature Changes of Cold Wave in Sichuan Basin from 1980 to 2017

作　　者：肖红茹[1,2] 龙柯吉[2] 伍清[1] 蒋兴文[1] XIAO Hongru;LONG Keji;WU Qing;JIANG Xingwen(Chengdu Institute of Plateau Meteorology,CM A,Heavy Rain and Drought-Flood Disasters of Plateau and Bain Key Laboratory of Sichuan Province,Chengdu 610072,China;Sichuan Meteorological Observatory,Chengdu 610072,China)

机构地区：[1]中国气象局成都高原气象研究所/高原与盆地暴雨旱涝灾害四川省重点实验室,成都610072 [2]四川省气象台,成都610072

出　　处：《高原山地气象研究》2020年第4期47-52,共6页Plateau and Mountain Meteorology Research

基　　金：四川省气象局次季节至季节气候预测创新团队。

摘　　要：利用"中国地面气候资料日值数据集(V3.0)"1980~2017年的地面日平均气温、最高气温和最低气温资料,按照四川盆地寒潮业务标准统计分析了38年四川盆地出现的77次区域寒潮特征及其日平均气温、最高气温和最低气温的变化特征,结果发现:近38年四川盆地区域寒潮频次呈不显著的增加趋势,增速为0.18次/10a,而强度呈显著增强趋势,增速为1.14℃/10a;平均最高气温和最低气温均表现为弱的升高趋势,且冬季比春、秋季升温趋势显著。寒潮天气过程中24h内主要表现为最高气温的下降,最低气温普遍下降不明显且近50%的站点趋于上升;最高气温累计降幅,春、秋季明显大于冬季,而最低气温累计降幅季节差异不大。给出72h气温累计变化趋势,类同24h。Based on the daily average temperature,daily maximum temperature and daily minimum temperature data from 1980 to 2017 in the"Dataset Of Daily Climate Data From Chinese Surface Stations For Global Exchange(V3.0)",the characteristics of 77 regional cold waves are analyzed statistically according to the Sichuan Basin Cold Wave Operational Standard,and the variations of daily average temperatures and daily maximum and minimum temperatures are analyzed as well.The results show that the frequency of the cold waves in Sichuan Basin had an increasing trend in these 38 years,with a growth rate of 0.18 times/10 a,but it was not significant.However,the strength of the cold waves was significantly enhanced,with a growth rate of 1.1℃/10 a.Meanwhile,the average maximum temperatures and minimum temperatures both demonstrated weak upward trends,and the warming trends were more significant in winter than in spring and autumn.During the cold waves,within 24 hours,the maximum temperature decreased,and the minimum temperature generally did not drop significantly;nearly 50%of the meteorological stations also rose;the cumulative drop of the maximum temperature in spring and autumn was significantly greater than that in winter,while the seasonal difference of the cumulative drop of the minimum temperature was not significant.The change trend of temperature in 72 hours is similar to that in 24 hours.

关 键 词：四川盆地 寒潮 频次 气温变化 

分 类 号：P462.4[天文地球—大气科学及气象学]