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dc.contributor.author
Sutanto, Samuel J.
dc.contributor.author
Hurk, B. J.J.M. van den
dc.contributor.author
Dirmeyer, Paul A.
dc.contributor.author
Seneviratne, Sonia I.
dc.contributor.author
Röckmann, Thomas
dc.contributor.author
Trenberth, Kevin E.
dc.contributor.author
Blyth, Eleanor
dc.contributor.author
Wenninger, Jochen W.
dc.contributor.author
Hoffmann, Georg
dc.date.accessioned
2019-06-11T15:34:39Z
dc.date.available
2017-06-11T11:44:08Z
dc.date.available
2019-06-11T15:34:39Z
dc.date.issued
2014
dc.identifier.issn
1027-5606
dc.identifier.issn
1607-7938
dc.identifier.other
10.5194/hess-18-2815-2014
en_US
dc.identifier.uri
http://hdl.handle.net/20.500.11850/87637
dc.identifier.doi
10.3929/ethz-b-000087637
dc.description.abstract
Current techniques to disentangle the evaporative fluxes from the continental surface into a contribution evaporated from soils and canopy, or transpired by plants, are under debate. Many isotope-based studies show that transpiration contributes generally more than 70% to the total evaporation, while other isotope-independent techniques lead to considerably smaller transpiration fractions. This paper provides a perspective on isotope-based versus non-isotope-based partitioning studies. Some partitioning results from isotope-based methods, hydrometric measurements, and modeling are presented for comparison. Moreover, the methodological aspects of the partitioning analysis are considered, including their limitations, and explanations of possible discrepancies between the methods are discussed. We suggest sources of systematic error that may lead to biases in the results, e.g., instruments inaccuracy, assumptions used in analyses, and calibration parameters. A number of comparison studies using isotope-based methods and hydrometric measurements in the same plants and climatic conditions are consistent within the errors; however, models tend to produce lower transpiration fractions. The relatively low transpiration fraction in current state-of-the-art land-surface models calls for a reassessment of the skill of the underlying model parameterizations. The scarcity of global evaporation data makes calibration and validation of global isotope-independent and isotope-based results difficult. However, isotope-enabled land-surface and global climate modeling studies allow for the evaluation of the parameterization of land-surface models by comparing the computed water isotopologue signals in the atmosphere with the available remote sensing and flux-based data sets. Future studies that allow for this evaluation could provide a better understanding of the hydrological cycle in vegetated regions.
en_US
dc.format
application/pdf
en_US
dc.language.iso
en
en_US
dc.publisher
Copernicus
en_US
dc.rights.uri
http://creativecommons.org/licenses/by/3.0/
dc.title
HESS Opinions "a perspective on isotope versus non-isotope approaches to determine the contribution of transpiration to total evaporation"
en_US
dc.type
Journal Article
dc.rights.license
Creative Commons Attribution 3.0 Unported
dc.date.published
2014-08-04
ethz.journal.title
Hydrology and Earth System Sciences
ethz.journal.volume
18
en_US
ethz.journal.issue
8
en_US
ethz.journal.abbreviated
Hydrol. earth syst. sci.
ethz.pages.start
2815
en_US
ethz.pages.end
2827
en_US
ethz.version.deposit
publishedVersion
en_US
ethz.identifier.wos
ethz.identifier.scopus
ethz.identifier.nebis
001881462
ethz.publication.place
Göttingen
en_US
ethz.publication.status
published
en_US
ethz.leitzahl
ETH Zürich::00002 - ETH Zürich::00012 - Lehre und Forschung::00007 - Departemente::02350 - Dep. Umweltsystemwissenschaften / Dep. of Environmental Systems Science::02717 - Institut für Atmosphäre und Klima / Inst. Atmospheric and Climate Science::03778 - Seneviratne, Sonia / Seneviratne, Sonia
en_US
ethz.leitzahl.certified
ETH Zürich::00002 - ETH Zürich::00012 - Lehre und Forschung::00007 - Departemente::02350 - Dep. Umweltsystemwissenschaften / Dep. of Environmental Systems Science::02717 - Institut für Atmosphäre und Klima / Inst. Atmospheric and Climate Science::03778 - Seneviratne, Sonia / Seneviratne, Sonia
ethz.date.deposited
2017-06-11T11:44:17Z
ethz.source
ECIT
ethz.identifier.importid
imp5936522aa91e118471
ethz.ecitpid
pub:137860
ethz.eth
yes
en_US
ethz.availability
Open access
en_US
ethz.rosetta.installDate
2017-07-13T09:28:31Z
ethz.rosetta.lastUpdated
2019-06-11T15:35:06Z
ethz.rosetta.exportRequired
true
ethz.rosetta.versionExported
true
ethz.COinS
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