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  Aerial and surface rivers: downwind impacts on water availability from land use changes in Amazonia

Weng, W., Lüdeke, M. K. B., Zemp, D. C., Lakes, T., Kropp, J. P. (2018): Aerial and surface rivers: downwind impacts on water availability from land use changes in Amazonia. - Hydrology and Earth System Sciences, 22, 1, 911-927.
https://doi.org/10.5194/hess-22-911-2018

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 Creators:
Weng, Wei1, Author              
Lüdeke, Matthias K. B.1, Author              
Zemp, Delphine Clara1, Author              
Lakes, Tobia2, Author
Kropp, Jürgen P.1, Author              
Affiliations:
1Potsdam Institute for Climate Impact Research, ou_persistent13              
2External Organizations, ou_persistent22              

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 Abstract: The abundant evapotranspiration provided by the Amazon forests is an important component of the hydrological cycle, both regionally and globally. Since the last century, deforestation and expanding agricultural activities have been changing the ecosystem and its provision of moisture to the atmosphere. However, it remains uncertain how the ongoing land use change will influence rainfall, runoff, and water availability as findings from previous studies differ. Using moisture tracking experiments based on observational data, we provide a spatially detailed analysis recognizing potential teleconnection between source and sink regions of atmospheric moisture. We apply land use scenarios in upwind moisture sources and quantify the corresponding rainfall and runoff changes in downwind moisture sinks. We find spatially varying responses of water regimes to land use changes, which may explain the diverse results from previous studies. Parts of the Peruvian Amazon and western Bolivia are identified as the sink areas most sensitive to land use change in the Amazon and we highlight the current water stress by Amazonian land use change on these areas in terms of the water availability. Furthermore, we also identify the influential source areas where land use change may considerably reduce a given target sink's water reception (from our example of the Ucayali River basin outlet, rainfall by 5–12 % and runoff by 19–50 % according to scenarios). Sensitive sinks and influential sources are therefore suggested as hotspots for achieving sustainable land–water management.

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 Dates: 2018
 Publication Status: Finally published
 Pages: -
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 Table of Contents: -
 Rev. Type: Peer
 Identifiers: DOI: 10.5194/hess-22-911-2018
PIKDOMAIN: Climate Impacts & Vulnerabilities - Research Domain II
eDoc: 7896
Research topic keyword: Freshwater
Research topic keyword: Land use
Research topic keyword: Atmosphere
Model / method: Nonlinear Data Analysis
Regional keyword: South America
Organisational keyword: RD2 - Climate Resilience
Working Group: Urban Transformations
 Degree: -

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Title: Hydrology and Earth System Sciences
Source Genre: Journal, SCI, Scopus, p3, oa
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Pages: - Volume / Issue: 22 (1) Sequence Number: - Start / End Page: 911 - 927 Identifier: CoNE: https://publications.pik-potsdam.de/cone/journals/resource/journals208