The relationship between precipitation heterogeneity and meteorological drought/flood in China
The relationship between precipitation heterogeneity and meteorological drought/flood in China
复制标题
DOI：
10.1007/s13351-016-5993-2
复制
发表时间：
2016-05
影响因子：
3.2
通讯作者：
Yonglin Liu;Junping Yan;Minyi Cen
中科院分区：
文献类型：
--
作者：
Yonglin Liu;Junping Yan;Minyi Cen
基于降水集中度（PCD）和综合气象干旱指数，研究了中国降水异质性和气象旱涝的时空特征。利用斯皮尔曼相关分析和典型相关分析，研究了中国降水异质性与气象旱涝的对应关系。结果表明：（1）气象旱涝强度呈现出从西北向东南逐渐变化的空间格局。(2)降水集中期（PCP）越长，降水集中期越长，干旱强度越大，洪涝强度越小。相反，与较低的PCD和早期的PCP，干旱的严重程度较低，洪水的严重程度较高。(3)气象旱涝与PCD相关显著。PCD越高，干旱持续时间越长，干旱发生的频率越高，反之亦然。结果表明，PCD和PCP与我国气象旱涝有显著的相关性。
In this study, we investigated the spatial and temporal characteristics of precipitation heterogeneity and meteorological drought/flood in China based on the precipitation-concentration degree (PCD) and the integrated meteorological drought index. We also studied the corresponding relationship between precipitation heterogeneity and meteorological drought/flood in China by using Spearman correlation analysis and canonical correlation analysis. The results show that: (1) The severity of meteorological drought/flood exhibited a spatial pattern of gradual change from Northwest to Southeast China. (2) With a higher PCD and a delayed precipitation-concentration period (PCP), the drought severity was higher but the flood severity was lower. In contrast, with a lower PCD and an early PCP, the drought severity was lower and the flood severity was higher. (3) The correlation between meteorological drought/flood and PCD was significant. The higher the PCD, the longer the duration of drought and more frequently, the droughts occurred, and vice versa. It is concluded that PCD and PCP were significantly correlated with meteorological drought/flood in China.