Analysis on the Variation Characteristics of Temperature and Precipitation in Benxi Area under the Background of Climate Warming

[Objective] The research aimed to study the variation characteristics of temperature and precipitation in Benxi area under the background of climate warming.[Method] Based on the monthly mean temperature and precipitation data of four routine meteorological stations in Benxi from 1953 to 2010,by using linear tendency rate,linear regression equation,wavelet analysis and Mann-Kendall detection,the variation characteristics of temperature and precipitation as the climate warming in the area were analyzed.[Result] The annual average temperature in Benxi area during 1953-2010 presented the rising trend,and the linear tendency rate was 0.28 ℃/10a.It was the temperature increase trend in four seasons.The rising rate in winter was the maximum and was the minimum in summer.The annual rainfall presented the decrease trend,and the linear tendency rate was-18.16 mm/10a.Except in spring,it was the decrease trend in other seasons.Mann-Kendall mutation detection showed that the mutation of annual average temperature in Benxi area in recent 58 years appeared in 1986.There was no mutation phenomenon in summer.Spring mutation appeared in 1974,and autumn mutation appeared in 1987.Winter mutation was in 1981.The annual and seasonal precipitation didn't have the mutation phenomenon.The wavelet analysis found that the annual average temperature had the periodic variations of 12-14,5-6 and 2 years in Benxi area in recent 58 years.The annual rainfall had the periodic fluctuations of 8-12,5-6 and 2 years.[Conclusion] The research provided the scientific basis for the exploration and sustainable development of climate resources in the mountain area.