globalchange  > 影响、适应和脆弱性
DOI: 10.1111/gcb.12223
论文题名:
Satellite-derived estimates of forest leaf area index in southwest Western Australia are not tightly coupled to interannual variations in rainfall: Implications for groundwater decline in a drying climate
作者: Smettem K.R.J.; Waring R.H.; Callow J.N.; Wilson M.; Mu Q.
刊名: Global Change Biology
ISSN: 13541013
出版年: 2013
卷: 19, 期:8
起始页码: 2401
结束页码: 2412
语种: 英语
英文关键词: Baseflow ; Climate change ; Ecohydrology ; Evapotranspiration ; Leaf area index ; Water balance
Scopus关键词: rain ; annual variation ; baseflow ; climate change ; drought ; ecohydrology ; evapotranspiration ; forest canopy ; groundwater ; leaf area index ; rainfall ; satellite data ; vegetation cover ; water budget ; article ; Australia ; baseflow ; biological model ; climate change ; ecohydrology ; ecosystem ; evapotranspiration ; fluid balance ; leaf area ; metabolism ; plant ; remote sensing ; space flight ; water flow ; baseflow ; climate change ; ecohydrology ; evapotranspiration ; leaf area index ; water balance ; Climate Change ; Ecosystem ; Models, Biological ; Plant Transpiration ; Plants ; Rain ; Remote Sensing Technology ; Spacecraft ; Water Movements ; Western Australia ; Australia ; Western Australia
英文摘要: There is increasing concern that widespread forest decline could occur in regions of the world where droughts are predicted to increase in frequency and severity as a result of climate change. The average annual leaf area index (LAI) is an indicator of canopy cover and the difference between the annual maximum and minimum LAI is an indicator of annual leaf turnover. In this study, we analyzed satellite-derived estimates of monthly LAI across forested coastal catchments of southwest Western Australia over a 12 year period (2000-2011) that included the driest year on record for the last 60 years. We observed that over the 12 year study period, the spatial pattern of average annual satellite-derived LAI values was linearly related to mean annual rainfall. However, interannual changes to LAI in response to changes in annual rainfall were far less than expected from the long-term LAI-rainfall trend. This buffered response was investigated using a physiological growth model and attributed to availability of deep soil moisture and/or groundwater storage. The maintenance of high LAIs may be linked to a long-term decline in areal average underground water storage and diminished summer flows, with an emerging trend toward more ephemeral flow regimes. © 2013 John Wiley & Sons Ltd.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/62377
Appears in Collections:影响、适应和脆弱性

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作者单位: Centre for Ecohydrology, School of Environmental Systems Engineering, University of Western Australia, Nedlands, WA 6009, Australia; Department of Forest Ecosystems and Society, College of Forestry, Oregon State University, Corvalis, OR 97331-5704, United States; School of Earth and Environment, University of Western Australia, Nedlands, WA 6009, Australia; Numerical Terradynamics Simulation Group, University of Montana, Missoula, MT 59812, United States

Recommended Citation:
Smettem K.R.J.,Waring R.H.,Callow J.N.,et al. Satellite-derived estimates of forest leaf area index in southwest Western Australia are not tightly coupled to interannual variations in rainfall: Implications for groundwater decline in a drying climate[J]. Global Change Biology,2013-01-01,19(8)
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