近42年雅鲁藏布江中游四季气温变化特征分析

利用 1957～ 1998年雅鲁藏布江中游拉萨、日喀则、泽当、江孜 4个站各月平均气温资料 ,通过线性趋势估计和多项式函数拟合分析了该流域春、夏、秋、冬 4季气温长期趋势变化和周期变化 ,并利用滑动T检验等方法讨论了气温突变的问题。结果表明 :在过去 4 2年里 ,雅鲁藏布江中游地区各季气温均有明显的上升趋势 ,其中冬春季增温显著 ,80年代初沿江四季气温除秋季外都出现了明显的增温突变

Analysis of seasonal temperature variation over middle reaches of Yalutsangpo River during past 42 years

The temperature variation over the middle reaches of Yalutsangpo River in the Tibetan Plateau is analyzed using the data observed from 1957 until 1998 at Stations Lasha, Xigaze, Zedang and Jiangzi. The results show that there exists a significant ascent trend of the temperature during the past 40 years over this region and an obvious climatic temperature jump from the late 1970s until the early 1980s.