气候变化领域集成服务门户(CCPortal): Recent Changes in Precipitation Extremes in the Heihe River basin, Northwest China

CCPortal

DOI	10.1007/s00376-015-4199-3
	Recent Changes in Precipitation Extremes in the Heihe River basin, Northwest China
	Cheng Aifang; Feng Qi; Fu, Guobin; Zhang Jiankai; Li Zongxing; Hu Meng; Wang Gang
发表日期	2015
ISSN	0256-1530
EISSN	1861-9533
卷号	32 期号:10
英文摘要	Changes in rainfall extremes pose a serious and additional threat to water resources planning and management, natural and artificial oasis stability, and sustainable development in the fragile ecosystems of arid inland river basins. In this study, the trend and temporal variation of extreme precipitation are analyzed using daily precipitation datasets at 11 stations over the arid inland Heihe River basin in Northwest China from 1960 to 2011. Eight indices of extreme precipitation are studied. The results show statistically significant and large-magnitude increasing and decreasing trends for most indices, primarily in the Qilian Mountains and eastern Hexi Corridor. More frequent and intense rainfall extremes have occurred in the southern part of the desert area than in the northern portion. In general, the temporal variation in precipitation extremes has changed throughout the basin. Wet day precipitation and heavy precipitation days show statistically significant linear increasing trends and step changes in the Qilian Mountains and Hexi Corridor. Consecutive dry days have decreased obviously in the region in most years after approximately the late 1980s, but meanwhile very long dry spells have increased, especially in the Hexi Corridor. The probability density function indicates that very long wet spells have increased in the QilianMountains. The East Asian summer monsoon index and western Pacific subtropical high intensity index possess strong and significant negative and positive correlations with rainfall extremes, respectively. Changes in land surface characteristics and the increase in water vapor in the wet season have also contributed to the changes in precipitation extremes over the river basin.
关键词	precipitation extremes atmospheric circulation Heihe River basin Northwest China
学科领域	Meteorology & Atmospheric Sciences
语种	英语
WOS研究方向	Meteorology & Atmospheric Sciences
来源期刊	ADVANCES IN ATMOSPHERIC SCIENCES
来源机构	中国科学院西北生态环境资源研究院
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/111800
作者单位	Chinese Acad Sci, Cold & Arid Reg Environm & Engn Res Inst, Lanzhou 730000, Peoples R China
推荐引用方式 GB/T 7714	Cheng Aifang,Feng Qi,Fu, Guobin,et al. Recent Changes in Precipitation Extremes in the Heihe River basin, Northwest China[J]. 中国科学院西北生态环境资源研究院,2015,32(10).
APA	Cheng Aifang.,Feng Qi.,Fu, Guobin.,Zhang Jiankai.,Li Zongxing.,...&Wang Gang.(2015).Recent Changes in Precipitation Extremes in the Heihe River basin, Northwest China.ADVANCES IN ATMOSPHERIC SCIENCES,32(10).
MLA	Cheng Aifang,et al."Recent Changes in Precipitation Extremes in the Heihe River basin, Northwest China".ADVANCES IN ATMOSPHERIC SCIENCES 32.10(2015).