globalchange  > 影响、适应和脆弱性
DOI: 10.1002/2015JD024676
Detecting significant decreasing trends of land surface soil moisture in eastern China during the past three decades (1979-2010)
Author: Chen X.; Su Y.; Liao J.; Shang J.; Dong T.; Wang C.; Liu W.; Zhou G.; Liu L.
Source Publication: Journal of Geophysical Research: Atmospheres
ISSN: 2169897X
Publishing Year: 2016
Language: 英语
Keyword: Climate change ; Drought ; Land use change ; Soil moisture ; Spatial pattern ; Temporal trend
English Abstract: Understanding the historical trends and driving mechanism of China's soil moisture change is an important step in combating climate change. Using the time series satellite-derived Essential Climate Variable Soil Moisture (ECV_SM) product, we detected a significant decrease trend in land surface soil moisture in eastern China over a 32 year period (1979-2010). Theoretical sensitivity analysis suggested that soil moisture is regulated collectively by precipitation (P), potential evapotranspiration (PET), land surface conditions such as land cover/use changes, landscape features, irrigation and urban expansion, (m), and the water balance between input and output water supplies O (the input water supplies minus the output). The change in spatial pattern and temporal trend of P/PET is highly consistent with the corresponding change in soil moisture. The magnitude of soil moisture variation is also well correlated with that of P/PET (R2=0.43; p<0.001). Therefore, P/PET is believed to be the dominant factor in determining the temporal trends of soil moisture change. Among the 29 drainage basins with significant decreasing trend of soil moisture change, the areas of forest cover increased by 36.08% and the average topographic slope was twice steeper than that of other regions. Therefore, besides the climate factor (P/PET variable), land surface conditions (such as land cover changes and topographic) also played important roles in regulating the trend of regional soil moisture change. ©2016. American Geophysical Union.
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被引频次[WOS]:25   [查看WOS记录]     [查看WOS中相关记录]
Document Type: 期刊论文
Appears in Collections:影响、适应和脆弱性

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Affiliation: Key Laboratory of Vegetation Restoration and Management of Degraded Ecosystems, South China Botanical Garden Chinese Academy of Sciences Guangzhou China; Guangzhou Institute of Geography Guangzhou China; Department of Biological Sciences University of Notre Dame Notre Dame, Indiana USA; Ottawa Research and Development Centre Agriculture and Agri-Food Canada Ottawa, Ontario Canada; Key Laboratory of Geoscience Spatial Information Technology, Ministry of Land and Resources of China Chengdu University of Technology Chengdu China

Recommended Citation:
Chen X.,Su Y.,Liao J.,et al. Detecting significant decreasing trends of land surface soil moisture in eastern China during the past three decades (1979-2010)[J]. Journal of Geophysical Research: Atmospheres,2016-01-01
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