干旱区生态环境知识资源中心(Arid): Long-term oscillation of drought conditions in the western China: an analysis of PDSI on a decadal scale

Arid

	Long-term oscillation of drought conditions in the western China: an analysis of PDSI on a decadal scale
	Jin Jia; Wang Quan; Li Lanhai
来源期刊	Journal of Arid Land
ISSN	1674-6767
出版年	2016
卷号	8 期号:6 页码:819-831
英文摘要	Water resource availability is one of the primary limiting factors with regard to ecosystems in the western China. Having a clear understanding of multi-scale drought patterns in this region is a key step for adaption and mitigation to climate change. The Palmer drought severity index(PDSI) is a widely applied index to assess drought conditions. In this study, long-term monthly self-calibrated PDSI data from 1951 to 2012 were examined for drought spatiotemporal variations in the western China. The results clearly indicated that apparent spatial heterogeneities were evidenced between two sub-regions(arid land with annual precipitation less than 200 mm and semiarid land with annual precipitation between 200 to 500 mm) as well as in the entire region of the western China. Ensemble empirical mode decomposition(EEMD) analyses on monthly PDSI and other atmospheric variable time-series obtained from the Department of Civil and Environmental Engineering, Princeton University revealed that all monthly time-series of variables could be completely decomposed into eight intrinsic mode functions(IMFs) and a trend(residual). This indicates that the monthly PDSI and atmospheric variables of the semiarid area in the western China contain eight quasi-period oscillations on various timescale spanning, seasonal to decadal cycles and a trend of a larger timescale from 1951-2012. The multi-scale drought patterns identified in this research could be powerful supports for decision-making regarding coping with droughts in this region.
英文关键词	decadal scale EEMD PDSI arid land semiarid land
类型	Article
语种	英语
开放获取类型	Bronze
收录类别	CSCD
WOS研究方向	Meteorology & Atmospheric Sciences
CSCD记录号	CSCD:5828492
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/335712
作者单位	Jin Jia, Joint Research Center of Drylands, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi, Xinjiang 830011, China.; Wang Quan, Joint Research Center of Drylands, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi, Xinjiang 830011, China.; Li Lanhai, Joint Research Center of Drylands, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi, Xinjiang 830011, China.
推荐引用方式 GB/T 7714	Jin Jia,Wang Quan,Li Lanhai. Long-term oscillation of drought conditions in the western China: an analysis of PDSI on a decadal scale[J],2016,8(6):819-831.
APA	Jin Jia,Wang Quan,&Li Lanhai.(2016).Long-term oscillation of drought conditions in the western China: an analysis of PDSI on a decadal scale.Journal of Arid Land,8(6),819-831.
MLA	Jin Jia,et al."Long-term oscillation of drought conditions in the western China: an analysis of PDSI on a decadal scale".Journal of Arid Land 8.6(2016):819-831.