干旱区生态环境知识资源中心(Arid): Spatio-temporal patterns of drought in North Xinjiang, China, 1961-2012 based on meteorological drought index

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	Spatio-temporal patterns of drought in North Xinjiang, China, 1961-2012 based on meteorological drought index
	Wu Yanfeng; Bake Batur; Zhang Jusong; Rasulov Hamid
来源期刊	Journal of Arid Land
ISSN	1674-6767
出版年	2015
卷号	7 期号:4 页码:527-543
英文摘要	Drought, which is one of the most frequently occurring severe hazards with long time scales and covering wide geographical areas, is a natural phenomenon resulting in significant economic losses in agriculture and industry. Drought is caused by an imbalance between the inputs of and the demand for water which is insufficient to meet the demands of human activities and the eco-environment. As a major arid and semi-arid area and an important agricultural region in Northwest China, North Xinjiang (NX) shows great vulnerability to drought. In this paper, the characteristics of inter-annual and seasonal drought were analyzed in terms of drought occurrence and drought coverage, by using the composite index of meteorological drought and the data of daily precipitation, air temperature, wind speed, relative humidity and sunshine duration from 38 meteorological stations during the period 1961-2012. Trend analysis, wavelet analysis and empirical orthogonal function were also applied to investigate change trend, period and regional characteristics, respectively. In NX, annual and seasonal drought occurrence and drought coverage all showed a decreasing trend that was most significant in winter (with rates of -0.26 month/10a and -15.46%, respectively), and drought occurrence in spring and summer were more frequent than that in autumn and winter. Spatially, drought was severe in eastern regions but mild in western regions of NX. Annual and seasonal drought occurrence at 38 meteorological stations displayed decreasing trends and were most significant in "Shi-hezi-Urumqi-Changji", which can help to alleviate severe drought hazards for local agricultural production and im-prove human livelihood. NX can be approximately classified into three sub-regions (severe drought region, moderate drought region and mild drought region), which were calculated from annual drought frequencies. The cross wavelet transform suggested that SOI (Southern Oscillation Index), AOI (Arctic Oscillation Index), AAOI (Antarctic Oscillation Index), PAOI (Pacific/North American Oscillation Index) and NAOI (North Atlantic Oscillation Index) have significant correlation with the variation of drought occurrence in NX. To prevent and mitigate the occurrence of drought disasters in NX, agricultural and government managers should pay more attention to those drought events that occur in spring and summer.
英文关键词	drought spatio-temporal pattern drought indices North Xinjiang
类型	Article
语种	英语
开放获取类型	Bronze
收录类别	CSCD
WOS研究方向	History
CSCD记录号	CSCD:5427732
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/335494
作者单位	Wu Yanfeng, College of Grassland and Environmental Science, Xinjiang Agricultural University, Urumqi, Xinjiang 830052, China.; Bake Batur, College of Grassland and Environmental Science, Xinjiang Agricultural University, Urumqi, Xinjiang 830052, China.; Zhang Jusong, College of Agronomy, Xinjiang Agricultural University, Urumqi, Xinjiang 830052, China.; Rasulov Hamid, Faculty of Hydrometeorology, Tajik Agrarian University, Tajikistan, 734003.
推荐引用方式 GB/T 7714	Wu Yanfeng,Bake Batur,Zhang Jusong,et al. Spatio-temporal patterns of drought in North Xinjiang, China, 1961-2012 based on meteorological drought index[J],2015,7(4):527-543.
APA	Wu Yanfeng,Bake Batur,Zhang Jusong,&Rasulov Hamid.(2015).Spatio-temporal patterns of drought in North Xinjiang, China, 1961-2012 based on meteorological drought index.Journal of Arid Land,7(4),527-543.
MLA	Wu Yanfeng,et al."Spatio-temporal patterns of drought in North Xinjiang, China, 1961-2012 based on meteorological drought index".Journal of Arid Land 7.4(2015):527-543.