全球变化背景下甘肃近半个世纪气温时空变化特征  

Spatiotemporal Distribution of Temperature in Gansu Province under Global Climate Change during the Period from 1956 to 2012

作　　者：窦睿音[1] 延军平[1] 王鹏涛[1] 

机构地区：[1]陕西师范大学旅游与环境学院,陕西西安710062

出　　处：《干旱区研究》2015年第1期73-79,共7页Arid Zone Research

基　　金：国家自然科学项目"部分重大自然灾害的时空对称性:结构;机理与适应性对策"(41171090)

摘　　要：利用1956—2012年甘肃省境内28个气象站点的日平均气温资料,运用一元线性回归分析、Mann-Kendall非参数检验、小波分析等气候数理统计方法,分析甘肃省不同空间尺度的气温变化特征。结论如下:近57 a甘肃省、河西及河东地区均表现出明显的暖化趋势,三者气温年际变化基本符合3个阶段:20世纪50年代末至70年代中期缓慢下降,70年代中期至2005年持续升高,2005年之后呈下降趋势;甘肃省及河东地区气温突变年份为1993年,河西地区在1994年发生气温突变;甘肃省气温空间分布呈中部低,两头高,西部低,东部高的特点;气温突变前后甘肃省气温空间变化符合全球变化规律,主要是受到自然因素和人为因素共同作用的结果。In this study,the temperature change at different spatial scales in Gansu Province,China during the period of 1956- 2012 was analyzed using the linear regression,Mann-Kendall mutation test,wavelet analysis and other climate mathematic statistic methods based on the daily temperature data from 31 meteorological stations. The results showed that there was a significant climate warming trend in whole Gansu Province and the Hexi and Hedong regions in recent 57 years. Temperature change in recent 57 years could be divided into three stages： the temperature was decreased gradually and slowly during the period from the late-1950＇s to the mid-1970＇s,increased persistently during the period from the mid-1970＇s to 2005,and decreased again from 2005. A temperature mutation in the whole province and the Hedong region occurred in 1993,but in 1994 in the Hexi region. Spatially,the temperature in Gansu Province was low in the central area but high in the east and west parts of the province. In general,the temperature in the west region was lower than that in the east region. Temperature change in Gansu was affected by both natural factors and human activities under global climate.

关 键 词：气候变化 突变 气温 时空分布 甘肃 

分 类 号：P467[天文地球—大气科学及气象学]