【摘要】 利用1960—2010年福建省逐日降水量资料,分析近51 a福建省极端降水事件的空间分布和时间变化趋势。结果表明:福建极端降水事件在空间上存在明显的地域差异,其中南部沿海多年平均极端降水阈值大、年总降水量大,而中北部地区年极端降水频次较多;全省区域平均及各站年极端降水频次、年极端降水总量、极端降水强度和年日最大降水量均呈线性增长趋势,且其变化趋势明显;经M-K检验显示,福建省年极端降水频次、年极端降水总量和年日最大降水量的突变时间均在1996年,而极端降水强度的突变时间略晚,发生在2002年。更多还原

【Abstract】 Using daily precipitation data from 50 principal weather stations over Fujian from 1960 to 2010, we analysized the spatial and temporal variation trends of extreme precipitation events over Fujian Province. The results show that there are significant differences in the spatial distribution of the extreme precipitation events. The multi-year mean annual extreme precipitation threshold and amount are larger in the middle-southern coast of Fujian than other regions, but the annual-mean extreme precipitation frequency is larger in central-northern Fujian than other regions. The regional average of annual extreme precipitation frequency, amount, intensity, and the daily maximum amount all show that a linear increasing trend is statistically significant. M-K test shows the mutation time was in 1996 for extreme precipitation frequency, amount and daily maximum amount, and in 2002 for extreme precipitation intensity.更多还原