摘要
运用R/S分析法对青藏高原拉萨、托托河、甘孜等12台站的年降水量、年雨日进行分形研究。结果表明:年降水量、年雨日的总体变化趋势存在着十分明显的Hurst现象;年降水量、年雨日时间序列的长期相关性特征总体表现为持续性。年降水量的变化趋势既有减少趋势,也有增加趋势;年雨日的变化出现了完全"统一"的显著减少趋势;年雨日与年降水量的长期变化趋势不完全一致。
The fractal research on annual precipitations and annual rain days of 12 meteorological stations such as Lhasa, Tuotuo River and Ganzi etc. in Tibetan plateau were conducted by R/S analysis. The results showed that the total change trends of annual precipitation and annual rain day had very obvious Hurst phenomena, and the long-term correlation characteristic between time sequences of annual precipitation and annual rain day showed to be durative on the whole. The change trends of annual precipitation included not only decreasing trend but also increasing trend, the change of annual rain day showed to be completely ＂unified＂ significant decreasing trend, and the long-term change trends of annual rain day and annual precipitation were not completely accordant.
出处
《安徽农业科学》
CAS
北大核心
2008年第1期295-298,339,共5页
Journal of Anhui Agricultural Sciences
基金
中国气象局气候研究开放实验室开放课题(LCS-2006-06)
绵阳师范学院重点科研基金项目联合资助项目
