Based on the daily precipitation and the maximum, minimum temperature from 16 weather stations in Handan of Hebei Province from 1974 to 2015, the climate change characteristics of extreme precipitation indexes were analyzed by using methods of linear trend analysis, Mann-Kendall test, and then the responses of extreme precipitation indexes to precipitation and temperature were discussed by using correlation analysis. The results show that the change trends of extreme precipitation indexes in Handan of Hebei Province were different during 1974-2015, and the days of middle rain (R10) had a slight rising trend, the heavy rain days (R20) and continuous wet days (CWD) hadn’t changed obviously, while the other indexes presented a decreasing trend, and the decreasing trend of the 1-day maximum precipitation (RX1day), 5-day maximum precipitation (RX5day) and extreme heavy precipitation (R99P) passed the significance test of 0.05 level, the mutations occurred in 2004, 1992, 2006, respectively. In space, the change rate of each extreme precipitation index had certain regional differences in recent 42 years. The decrease of extreme value indexes, absolute indexes and relative indexes were most obvious in Qiuxian and Quzhou, Fengfeng and Quzhou during 1974-2015, respectively. The extreme precipitation indexes were significantly positive correlated with the annual precipitation except for continuous dry days (CDD). The most extreme precipitation indexes were negative correlated with the maximum and minimum temperature, while R10 and CWD were slightly positive correlated with the minimum temperature, and the response of extreme precipitation to the maximum temperature was more sensitive than to the minimum temperature.
DU Liangliang, ZHOU Xueying, ZHAO Youpu, WANG Shigong. Variation Characteristics of Extreme Precipitation Indexes and Their Relationships with Precipitation and Temperaturein Handan of Hebei Province from 1974 to 2015[J]. Journal of Arid Meteorology,
DOI: 10.11755/j.issn.1006-7639(2017)-06-0968
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