Temporal and Spatial Variation Analysis of the Main Extreme Climate Index inHebei Province

doi:10.3969/j.issn.1000-6362.2015.03.001

Abstract

Abstract: Based on the data of daily maximum temperature，daily minimum temperature，daily mean temperature and daily precipitation of 142 stations in Hebei province from 1961 to 2010，the spatial and temporal characteristics of extreme temperature and precipitation events was analyzed by using regression analysis and Kriging.The results showed:（1）from the perspective of spatial distribution of extreme temperature index，the extreme maximum temperature and summer days index showed a decreasing trend from south to north gradually and the high value centers were located in Handan，Xingtai，Shijiazhuang，Hengshui and Handan，Xingtai，Shijiazhuang，Hengshui，Langfang，Cangzhou.However，frost days in northern area were higher than that of south and the high value center was mainly located in the north of Zhangjiakou.Extreme minimum temperature，warm days and continued cold period did not show obviously spatial distribution pattern.From the perspective of variation trend，summer days，warm days，extreme minimum temperature and extreme maximum temperature of most regions showed an increasing variation trend.Frost days showed a decreasing variation trend and the variation trend of continued cold period was not obvious.（2）From the perspective of the spatial distribution of extreme precipitation index，the 6 extreme precipitation indices did not show obvious distribution pattern.The daily maximum precipitation，strong precipitation，rainstorm days，continuous dry days and continuous humid days showed sporadic distribution.Precipitation intensity generally showed a decreasing trend from southeast to northwest.From the variation trend，the daily maximum precipitation，strong rainfall，rainfall intensity，continuous a wet day and rainstorm days of most regions decreased and continuous dry day showed an increasing trend in 1961-2010.From the changing trend of extreme temperature and precipitation index，Hebei province tended to be warm and dry.Therefore，agricultural production should take the corresponding countermeasure to adapt to the changing climate．

Key words: Climate change, Extreme temperature, Extreme precipitation, Spatial distribution, Variation trend

CAO Xiang hui，LONG Huai yu，ZHANG Ji zong，LEI Qiu liang，WU Shu xia，LIU Hong bing. Temporal and Spatial Variation Analysis of the Main Extreme Climate Index inHebei Province[J]. Chinese Journal of Agrometeorology, 2015, 36(03): 245-253.

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