近46年重庆地区气温变化特征分析

利用1961~2006年期间重庆地区的气温资料,对重庆气温变化的特征进行分析。结果表明:近46年,重庆年平均、年平均最高气温都经历了先降温后升温的过程,而且前期1961~1985年的降温趋势和后期1986~2006年的升温趋势都很显著,均通过了0.01的显著性水平检验。而年平均最低气温近46年的整体上升趋势明显,通过了0.01的显著性水平检验。对于重庆平均气温和平均最高气温,在前期降温过程中,春季和夏季的下降趋势显著;而在后期的升温过程中,春季和秋季的增温趋势显著。 

Characteristics of Temperature Change in Chongqing During 1961-2006

On basis of the monthly average, maximum and minimum temperature data from 30 weather stations in Chongqing during the period of 1961~2006, the characteristics of temperature change in Chongqing is analyzed.The main results show that the annual average, maximum temperature in Chongqing both experienced a process from decrease to increase during the period of 1961~2006, and the decreasing treands from 1961 to 1985 and the increasing trends from 1986 to 2006 are all distinctive and over the significant level at 0.01.The annual minimum temperature in Chongqing had an increasing trend all the while over the significant level at 0.01.As for average and maximum temperature, there are distinctive decreasing treads in spring and summer from 1961 to 1985, and there are distinctive increasing trends in spring and autumn from 1986 to 2006.