干旱区研究2012，Vol.29Issue(5)：847-853,7.
祁连山区降水气候特征分析
Analysis on the Change of Precipitation in the Qilian Mountains
摘要
Abstract
In this paper, the various trends and distributional characteristics of precipitation in the Qilian Mountains were studied using the data of hourly and daily precipitation in the mountains. Moreover, the tree-ring data of Picea asperata growing in the study area were used to analyze the response of tree-ring width to precipitation in the mountainous. A unitary linear regression model was used to develop a transfer equation so as to reveal the re- lationships between the standardized chronology of tree-ring width and the average precipitation at Minle Meteoro-logical Station during the period from August to next July and the change of annual precipitation in recent 200 years. The results show that precipitation in 19^th century was higher than that in 20^th century. Drought occurred in-creasingly in 20^th century, especially severe drought occurred in the 1920s and 1930s, such trend was consistent with that in north China. Precipitation in the Qilian Mountains was closely related to the altitude, and most precipi-tation occurred in the afternoon and nighttime. Flood season in the study area is in July and August. Moreover, the frequency of extreme precipitation was increased in recent decades, and the change of annual precipitation was not significant.关键词
降水变率/气候变化/树木年轮/海拔高度/降水序列/祁连山Key words
precipitation variability/climate change/tree-ring/altitude/precipitation series/Qilian Mountains分类
天文与地球科学引用本文复制引用
陈志昆,张书余,雒佳丽,李照荣,孙..祁连山区降水气候特征分析[J].干旱区研究,2012,29(5):847-853,7.基金项目
公益性行业（气象）科研专项经费“地形复杂地区的MOS预报效果改进方法研究”项目 （）
