Temporal and spatial characteristics of wet-dry climate variation in the northern slope of Tianshan Mountains,Xinjiang
Based on the monthly temperature and rainfall data of 1961-2006,aridity is calculated and its multi-time scales characteristics in different divisions in the northern slope of Tianshan Mountains have been analyzed using Mexican Hat wavelet analysis in this article.The periodic oscillation of aridity variation and the points of abrupt change at different time scales along the time series are discovered.Also the trend of climate change is tested.Additionally,possible association of climate variation in this area with ENSO is explored using SOI date series.The research results indicate that there exist obvious regional characteristics of wet-dry climate variation in the northern slope of Tianshan Mountains.Wavelet analysis shows that there mainly exits two modes of scales (12-24 years and 4-8 years) in every division,while catastrophe point differs in different zones.To predict on the scale of 12-24 years,it will be relatively dry in mountain division and desert area in a period after 2006.In addition,the transition from warm-dry to warm-wet appears in oasis area.Correlation analysis indicted that aridity variation of the northern slope of Tianshan Mountains is affected by ENSO,while influence degree is different between areas;furthermore,this influence is one-year lagging behind ENSO in the whole area.
climate variation temporal and spatial characteristics wavelet analysis ENSO
Yu meiyan ChenXi Bao anming
Xinjiang Institute of Ecology and Geography,Chinese Academy of Sciences,Urumqi,China,830011;Graduate Xinjiang Institute of Ecology and Geography,Chinese Academy of Sciences,Urumqi,China,830011
国际会议
第16届国际地理信息科学与技术大会(16th International Conference on GeoInformatics and the Joint Conference)
广州
英文
2008-06-28（万方平台首次上网日期，不代表论文的发表时间）