Temporal-spatial variation characteristics of temperature and precipitation in Henan Province from 1961 to 2014
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Abstract:
In recent years, the global change has become a hot topic at home and abroad, the temperature and precipitation play the vital role in the climate change. Henan Province is the important grain base of China, and studying the temporal and spatial variation characteristics of the temperature and precipitation has a profound guiding for the agricultural production., The annual and seasonal changes of the temperature and precipitation in Henan Province from 1961 to 2014 were analyzed using the linear regression method，cumulative anomaly method，and M-K test method. The results indicated that, in recent 54 years, the annual mean temperature rose significantly, increasing by 0.18℃/10a; except in summer，the seasonal mean temperatures of the rest seasons showed increasing trends; and an abrupt change from low to high occurred in 1993-1994. The plain regions had warmed at a faster rate than the hilly area. The annual precipitation showed a subtle decreasing trend in recent 54 years, decreasing by -7.26mm/10a; the decreasing season was spring and autumn and the increasing season was summer and winter, and the abrupt change of precipitation occurred in 2011-2012. The precipitation increased significantly in the eastern plain area and decreased significantly in the area of mountain in the northwest and south as well as the west of Nanyang.
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