安康气象站1953-2016年气温变化特征研究

Analysis on variation characteristics of air temperature in Ankang weather station from 1953 to 2016

探讨气温变化规律,能够为发展农业生产、合理利用气候资源提供指导。根据安康气象站1953-2016年逐月气温数据,利用滑动平均、Mann-Kendall突变检验和Morlet小波分析等方法,对安康地区近64年气温变化特征进行了分析。结果显示:安康地区近64年除夏季气温和年极端最高气温呈微弱下降趋势以外,年均气温、春季气温、秋季气温、冬季气温、年极端最低气温均呈上升趋势,其中春季和冬季上升幅度最大,其变率分别0. 156℃/10 a、0. 169℃/10 a。安康地区近64年年均气温存在23和31 a两类变化周期,极端最高气温存在31 a变化周期,极端最低气温存在6、13、30 a三类变化周期。

Exploring the law of temperature change can provide guidance for the development of agricultural production and rational utilization of climatic resources.Based on meteorological observation data of monthly air temperature in Angkang from1953 to 2016,the sliding average,Mann-Kendall mutation test and Morlet wavelet analysis were applied to analyze the variation characteristics of air temperature in Ankang in the latest 64 years.The results show that the annual average temperature,the spring temperature,the autumn temperature,the winter temperature,and the annual minimum temperature all showed an upward trend in the Ankang area in the latest 64 years,except that the summer temperature and annual extreme maximum temperature showed a slight downward trend.The greatest increase occurred in spring and winter,with the variability being 0.156℃/10 a and 0.169℃/10 a respectively.There are 23 a and 31 a cycles in the annual average temperature of the latest 64 years in Ankang,the extreme maximum temperature hanppened in the 31 a cycle,and the extreme minimum temperature happened in the 6 a,13 a and 30 a cycle.