摘要
根据甘肃南部白龙江流域气象资料,采用Mann-Kendall突变检测法和小波分析法对白龙江流域近40 a来气候变化特征进行分析,结果表明:①20世纪80年代之前气温变化趋势不明显,80—90年代波动显著,并呈下降趋势,至90年代中后期气温变化呈显著上升趋势;②降水量变化在90年代中期之前趋势不显著,之后呈下降趋势,流域趋于暖干化;③气温变化主要周期上游地区为7 a、27 a和4 a,中下游地区为17 a;④降水变化主要周期上游地区为7 a和4 a,中下游为25 a、9 a和4 a。
Based on meteorology observation data of the each site in Bailong River valley, the Mann-Kendall method and the Morlet wavelet analysis technique were applied to analyze the tendency characteristics of climate change in recent 40 years of Bailong River valley in south Gansu. The resuits show that the tendency of temperature change is not obvious before 1980 ＇ s there and this trend fluctuates significantly between 1980 ＇ s and 1990＇s but keeping decrease, while the inter-annual change of temperature is obviously ascending after mid 1990＇ s. Inter-annual precipitation trend is not significant before mid 1990＇ s, while it demonstrates a marked decreasing trend after mid 1990＇ s, which is enough to demonstrate the climate tend to become warm and dry. Moreover, the first, second and third for the main cycle of temperature change is 7a, 27a and 4a in the upstream area respectively, and 17a in the downstream; the first, second and third for the main cycle of precipitation change is 7a and 4a in the upstream area, and 25a, 9a and 4a in the downstream.
出处
《人民黄河》
CAS
北大核心
2012年第10期41-43,共3页
Yellow River
基金
"十一五"国家科技支撑计划项目(2011BAK12B05)
作者简介
赵艳萍（1986-），女，甘肃山丹人，硕士研究生，研究方向为干旱区水文水资源。E—mail：fitzroyll@163．com
