globalchange  > 气候变化事实与影响
DOI: 10.5194/hess-21-4469-2017
Scopus记录号: 2-s2.0-85029164987
论文题名:
Large-scale vegetation responses to terrestrial moisture storage changes
作者: Andrew R; L; , Guan H; , Batelaan O
刊名: Hydrology and Earth System Sciences
ISSN: 10275606
出版年: 2017
卷: 21, 期:9
起始页码: 4469
结束页码: 4478
语种: 英语
Scopus关键词: Digital storage ; Discrete wavelet transforms ; Land use ; Moisture ; Time series ; Wavelet transforms ; Different frequency ; Gravity recovery and climate experiments ; Large spatial scale ; Moisture dependence ; Normalised difference vegetation index ; Temporal resolution ; Temporal variability ; Vegetation response ; Vegetation ; annual variation ; GRACE ; land use change ; NDVI ; regression analysis ; satellite data ; vegetation cover ; vegetation type ; water storage ; Australia
英文摘要: The normalised difference vegetation index (NDVI) is a useful tool for studying vegetation activity and ecosystem performance at a large spatial scale. In this study we use the Gravity Recovery and Climate Experiment (GRACE) total water storage (TWS) estimates to examine temporal variability of the NDVI across Australia. We aim to demonstrate a new method that reveals the moisture dependence of vegetation cover at different temporal resolutions. Time series of monthly GRACE TWS anomalies are decomposed into different temporal frequencies using a discrete wavelet transform and analysed against time series of the NDVI anomalies in a stepwise regression. The results show that combinations of different frequencies of decomposed GRACE TWS data explain NDVI temporal variations better than raw GRACE TWS alone. Generally, the NDVI appears to be more sensitive to interannual changes in water storage than shorter changes, though grassland-dominated areas are sensitive to higher-frequencies of water-storage changes. Different types of vegetation, defined by areas of land use type, show distinct differences in how they respond to the changes in water storage, which is generally consistent with our physical understanding. This unique method provides useful insight into how the NDVI is affected by changes in water storage at different temporal scales across land use types. © Author(s) 2017.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/79066
Appears in Collections:气候变化事实与影响

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作者单位: School of the Environment, Flinders University, Bedford-Park, Australia; National Centre for Groundwater Research and Training, Bedford-Park, Australia

Recommended Citation:
Andrew R,L,, Guan H,et al. Large-scale vegetation responses to terrestrial moisture storage changes[J]. Hydrology and Earth System Sciences,2017-01-01,21(9)
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