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为向全球变暖背景下的陕西省秦岭地区生态环境建设和区域农业发展提供科学依据,采集1961—2010年该区域71个气象台站的资料,采用气象数据小网格推算、Mann-kendall突变检验、Morlet小波分析法,分析了秦岭南北近50年来稳定通过≥0℃的热量资源的积温、初日、终日和持续日数的变化特征,结果表明:近50年来秦岭南北≥0℃的积温增加、初日提前、终日推迟和持续日数延长,除秦岭北部≥0℃初日变化速度慢于秦岭南部外,秦岭北部≥0℃的积温、终日和持续时间变化速度快于秦岭南部;秦岭南北≥0℃的积温和持续日数发生由少到多突变的年份分别为2003和1997年,秦岭南北≥0℃初日发生由推迟到提前的突变年份为1997年,秦岭南北≥0℃终日发生由提前到推迟的突变年份为1972和1976年。秦岭地区≥0℃积温的空间变化相似,整体呈增加趋势。秦岭南北初日和持续日数具有相同的周期,秦岭南北的终日具有相同的短周期,而秦岭南北的积温具有相同的长周期。
In order to provide scientific basis for ecological environment construction and regional agricultural development in Qinling area of Shaanxi Province in the context of global warming, the data of 71 meteorological stations in the region from 1961 to 2010 were collected. Based on the small grid meteorological data and Mann-kendall mutation test Morlet wavelet analysis was used to analyze the characteristics of accumulated temperature, initial day, final day and duration of steady-state heat resources which pass through ≥0 ℃ in the past 50 years in Qinling Mountains. The results show that the accumulated temperature ≥0 ℃ in north and south of Qinling Mountains increased in the past 50 years. In addition, the initial temperature ≥0 ℃ in the northern part of Qinling Mountains changed faster than that in the southern part of Qinling Mountains except for ≥0 ℃ in the northern part of Qinling Mountains. The accumulated temperature and the final day and the duration of ≥0 ℃ in the northern part of Qinling Mountains were faster than those in the Qinling Mountains ≥0 ℃ And the number of consecutive days from less to more sudden changes were 2003 and 1997, Qinling Mountains north and south ≥ 0 ℃ occurred from the early to postpone the mutation occurred in 1997, Qinling North and South ≥ 0 ℃ occurred from early to postpone the sudden change of the year For 1972 and 1976. The spatial variation of accumulated temperature ≥0 ℃ in Qinling is similar, showing an overall increasing trend. The first day of the Qinling Mountains and the last days of the Qinling Mountains have the same period, while the Qinling Mountains have the same short period all day long, while the accumulated temperature of the Qinling Mountains has the same long period.