干旱区生态环境知识资源中心(Arid): Soil moisture drought detection and multi-temporal variability across China

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	Soil moisture drought detection and multi-temporal variability across China
	Li Mingxing; Ma Zhuguo
来源期刊	Science China. Earth Sciences
ISSN	1674-7313
出版年	2015
卷号	58 期号:10 页码:1798-1813
英文摘要	Soil moisture droughts can trigger abnormal changes of material and energy cycles in the soil-vegetation-atmosphere system, leading to important effects on local ecosystem, weather, and climate. Drought detection and understanding benefit disaster alleviation, as well as weather and climate predictions based on the understanding the land-atmosphere interactions. We thus simulated soil moisture using land surface model CLM3.5 driven with observed climate in China, and corrected wet bias in soil moisture simulations via introducing soil porosity parameter into soil water parameterization scheme. Then we defined soil moisture drought to quantify spatiotemporal variability of droughts. Over the period from 1951 to 2008, 40% of months (to the sum of 12*58) underwent droughts, with the average area of 54.6% of total land area of Mainland China. The annual monthly drought numbers presented a significant decrease in arid regions, but a significant increase in semi-arid and semi-humid regions, a decrease in humid regions but not significant. The Mainland as a whole experienced an increasing drought trend, with 77.3% of areal ratio of decrease to increase. The monthly droughts in winter were the strongest but the weakest in summer, impacting 54.3% and 8.4% total area of the Mainland, respectively. The drought lasting three months or more occurred mainly in the semi-arid and semi-humid regions, with probability >51.7%, even >77.6%, whereas those lasting 6 and 12 months or more impacted mainly across arid and semi-arid regions.
英文关键词	soil moisture droughts soil moisture CLM3.5 land surface process modeling
类型	Article
语种	英语
收录类别	CSCD
WOS研究方向	Agriculture
CSCD记录号	CSCD:5530170
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/335556
作者单位	Li Mingxing, Institute of Atmospheric Physics, Chinese Academy of Sciences, Key Laboratory of Regional Climate-Environment for East Asia, Chinese Academy of Sciences, Beijing 100029, China.; Ma Zhuguo, Institute of Atmospheric Physics, Chinese Academy of Sciences, Key Laboratory of Regional Climate-Environment for East Asia, Chinese Academy of Sciences, Beijing 100029, China.
推荐引用方式 GB/T 7714	Li Mingxing,Ma Zhuguo. Soil moisture drought detection and multi-temporal variability across China[J],2015,58(10):1798-1813.
APA	Li Mingxing,&Ma Zhuguo.(2015).Soil moisture drought detection and multi-temporal variability across China.Science China. Earth Sciences,58(10),1798-1813.
MLA	Li Mingxing,et al."Soil moisture drought detection and multi-temporal variability across China".Science China. Earth Sciences 58.10(2015):1798-1813.