摘要
利用线性趋势法对1961—2008年阿勒泰地区7个气象站点气温日较差进行趋势研究,并根据各因子趋势值,应用相关统计法分析了影响气温日较差呈减小趋势的因子。结果表明:阿勒泰地区四季日较差呈显著减小趋势,其中冬季最显著,秋季变化最弱。各季节最低气温上升趋势最明显,而最高气温上升趋势较弱。阿勒泰地区月平均气温日较差相关性最强的因子是日照时数,呈正相关;其次分别为总云量、降水量和水汽压,均呈负相关。年气温日较差与降水量和水汽压相关性最大。
The variation trend of the diurnal temperature range（DTR） and its impacting factors were analyzed using methods of a liner trend and a statistic correlation analysis based on temperature data at 7 weather stations from 1961 to 2008 in Altay region.The results indicated that the seasonal DTR is in a significant decreasing trend,especially in winter.Variation of autumn DTR is small.The increasing trends of seasonal minimum temperature are the most significant,while those of seasonal maximum temperature are not significant.The monthly mean DTR has significantly positive correlation with sunshine duration,while it has negative correlation with total cloud cover,precipitation and vapor pressure.Annual DTR has significant correlation with precipitation and vapor pressure.
出处
《气象与环境学报》
2012年第2期77-80,共4页
Journal of Meteorology and Environment
基金
新疆维吾尔自治区气象局青年基金项目(201228)资助
关键词
气温日较差
趋势检验
影响因子
Diurnal temperature range（DTR）
Trend test
Impacting factor
