摘要
基于1961-2023年贵阳国家基准气候站降水观测日数据,选取四组共8个降水极端指数,对贵阳极端降水气候事件的时间变化趋势进行了分析,结果表明:①极端降水气候事件总体呈增长趋势,其中RX1day、SDII、R50mm、R95p、R99p均逐年增加,CDD、CWD逐年减弱;②RX1day和R20mm在1986年和1989年发生明显突变;SDII、R95p和R99p分别在1982年、1997年和1990年突变,但突变不明显;③CDD、RX1day、SDII、R50mm、R95p和R99p在20世纪90年代和21世纪10年代的平均值明显高于其他年代;CWD和R20mm在21世纪10年代的平均值也高于20世纪10年代;④21世纪10年代以来贵阳极端降水强度有所增强,RX1day、SDII、R20mm、R50mm、R95p的最大值均出现2014-2020年。
Based on the precipitation observation day data of Guiyang National Benchmark Climate Station from 1961 to 2023,four sets of 8 precipitation extreme indices were selected to analyze the temporal trend of extreme precipitation climate events in Guiyang.The results showed that:①Extreme precipitation climate events showed an overall increasing trend,with RX1day,SDII,R50mm,R95p,and R99p increasing year by year,while CDD and CWD decreasing year by year.②RX1day and R20mm underwent significant mutations in 1986 and 1989;SDII,R95p,and R99p mutated in 1982,1997,and 1990 respectively,but the mutations were not significant.③The average values of CDD,RX1day,SDII,R50mm,R95p,and R99p in the 1990s and 2010s were significantly higher than those in other eras;The average values of CWD and R20mm in the 2010s were also higher than those in the first decade of the 20th century since the 2010s.④The extreme precipitation intensity in Guiyang has increased,with the maximum values of RX1day,SDII,R20mm,R50mm,and R95p appearing from 2014 to 2020.
作者
张杰
田孟勤
沈扬迪
严江
梁超
Zhang Jie;Tian Mengqin;Shen Yangdi;Yan Jiang;Liang Chao(Huaxi District Meteorological Bureau,Guiyang 550025,Guizhou,China;Guiyang City Meteorological Bureau,Guiyang 550001,Guizhou,China)
出处
《绿色科技》
2024年第14期64-68,共5页
Journal of Green Science and Technology
关键词
极端降水
变化趋势
贵阳
extreme precipitation
changing trend
Guiyang
