摘要
利用喀什1970-2008年日照时数、浮尘、扬沙、沙尘暴日数等资料,对该地区日照时数的变化及其可能影响进行分析。结果表明:喀什年日照时数呈显著增加趋势,年际变化较大,存在明显的季节差异。20世纪70年代喀什年日照时数变化不大,80年代异常偏少,90年代略偏少,2000-2008年日照时数异常偏多。喀什年日照时数存在准28年变化周期,在1997年发生了突变。浮尘日数显著减少是造成喀什年日照时数、春季和夏季日照时数显著增加的主要原因之一,沙尘暴、扬沙不是影响喀什日照时数变化的主要因子。
In this paper,the change of sunshine duration and its affecting factors are analyzed based on the data of sunshine duration and occurring days of blowing dust,floating dust and sandstorm in Kashgar,Xinjiang during the period 1970-2008. The results show that the sunshine duration was increased notably in recent 39 years. There were the significant seasonal and annual variations of sunshine duration. The sunshine duration was changed insignificantly in the 1970s,sharply decreased in the 1980s,slightly decreased in the 1990s,but sharply increased during the period of 2000-2008. There was a 28-year periodic change of sunshine duration in Kashgar,and also a 25-year one in recent 39 years. An abrupt change of sunshine duration occurred in 1997. The significant increase of annual,spring and summer sunshine durations was mainly caused by the obvious reduction of floating dust,however sandstorm and blowing dust were not the main factors affecting the sunshine duration in Kashgar.
出处
《干旱区研究》
CSCD
北大核心
2011年第1期158-162,共5页
Arid Zone Research
基金
科技部科技支撑计划项目"北方农业低温冷害监测预警技术研究"(2006BAD04B02)
新疆维吾尔自治区气象局业务新技术项目(YX200808)
关键词
日照时数
浮尘
扬沙
沙尘暴
年际变化
喀什
新疆
sunshine duration
floating dust
blowing dust
sand storm
Kashgar
Xinjiang
