Abstract:
:Forested catchments provide critically important water resources. Due to dramatic global forest change over the past decades, the importance of including forest or vegetation change in the assessment of water resources under climate change has been highly recognized by Intergovernmental Panel on Climate Change (IPCC); however, this importance has not yet been examined quantitatively across the globe. Here, we used four remote sensing-based indices to represent changes in vegetation cover in forest-dominated regions, and then applied them to widely used models: the Fuh model and the Choudhury-Yang model to assess relative contributions of vegetation and climate change to annual runoff variations from 2000 to 2011 in forested landscape (forest coverage >30%) across the globe. Our simulations show that the global average variation in annual runoff due to change in vegetation cover is 30.7% ± 22.5% with the rest attributed to climate change. Large annual runoff variation in response to vegetation change is found in tropical and boreal forests due to greater forest losses. Our simulations also demonstrate both offsetting and additive effects of vegetation cover and climate in determining water resource change. We conclude that vegetation cover change must be included in any global models for assessing global water resource change under climate change in forest-dominant areas.
journal_name
Glob Chang Bioljournal_title
Global change biologyauthors
Wei X,Li Q,Zhang M,Giles-Hansen K,Liu W,Fan H,Wang Y,Zhou G,Piao S,Liu Sdoi
10.1111/gcb.13983subject
Has Abstractpub_date
2018-02-01 00:00:00pages
786-795issue
2eissn
1354-1013issn
1365-2486journal_volume
24pub_type
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