青海省积温变化特征分析

利用青海省1961 ～2010年逐日气温资料,采用气候趋势系数、小波分析等方法,分析了近50年来青海省积温的变化特征.结果表明,1961 ～2010年日平均气温通过0、3、5、10℃的初日均呈提前趋势,终日呈推后趋势,积温显著增加;在东部农业区及柴达木盆地积温指标对气候变暖的响应尤为明显;各界限温度普遍存在8 ～10、14～16年的周期,0、3、5、10℃初日、终日及积温的空间分布总体表现出北早南晚、北晚南早、北多南少的分布形式.

Analysis of Variation Characteristics of Accumulated Temperature in Qinghai Province

Using the daily temperature data from 1961 to 2010 in Qinghai Province,adopting climate tendency coefficient,wavelet analysis,the change characteristics of accumulated temperature in Qinghai in recent 50 years were analyzed.The results showed that the beginning day of average daily temperature 0,3,5,10 ℃ indicated advancing trend,and delay trend of the last day and accumulated temperature increased significantly from 1961 to 2010.Accumulated temperature indicators have obvious response to climate change in Chaidamu Basin and the east agricultural region.The boundary temperature existed 8-10,14-16 years cycle,the beginning day and the last day and accumulated temperature of 0,3,5,10 ℃ showed the spatial distribution form of north and south on the contrary.