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dc.contributor.author
Pfahl, Stephan
dc.contributor.author
Sodemann, Harald
dc.date.accessioned
2019-06-27T07:24:22Z
dc.date.available
2017-06-11T07:22:32Z
dc.date.available
2019-06-27T07:24:22Z
dc.date.issued
2014
dc.identifier.issn
1814-9324
dc.identifier.issn
1814-9332
dc.identifier.other
10.5194/cp-10-771-2014
en_US
dc.identifier.uri
http://hdl.handle.net/20.500.11850/82937
dc.identifier.doi
10.3929/ethz-b-000082937
dc.description.abstract
The deuterium excess (d) of precipitation is widely used in the reconstruction of past climatic changes from ice cores. However, its most common interpretation as moisture source temperature cannot directly be inferred from present-day water isotope observations. Here, we use a new empirical relation between d and near-surface relative humidity (RH) together with reanalysis data to globally predict d of surface evaporation from the ocean. The very good quantitative agreement of the predicted hemispherically averaged seasonal cycle with observed d in precipitation indicates that moisture source relative humidity, and not sea surface temperature, is the main driver of d variability on seasonal timescales. Furthermore, we review arguments for an interpretation of long-term palaeoclimatic d changes in terms of moisture source temperature, and we conclude that there remains no sufficient evidence that would justify to neglect the influence of RH on such palaeoclimatic d variations. Hence, we suggest that either the interpretation of d variations in palaeorecords should be adapted to reflect climatic influences on RH during evaporation, in particular atmospheric circulation changes, or new arguments for an interpretation in terms of moisture source temperature will have to be provided based on future research.
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
What controls deuterium excess in global precipitation?
en_US
dc.type
Journal Article
dc.rights.license
Creative Commons Attribution 3.0 Unported
dc.date.published
2014-04-22
ethz.journal.title
Climate of the Past
ethz.journal.volume
10
en_US
ethz.journal.issue
2
en_US
ethz.journal.abbreviated
Clim. past
ethz.pages.start
771
en_US
ethz.pages.end
781
en_US
ethz.version.deposit
publishedVersion
en_US
ethz.identifier.wos
ethz.identifier.scopus
ethz.identifier.nebis
005583758
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::03854 - Wernli, Johann Heinrich / Wernli, Johann Heinrich
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::03854 - Wernli, Johann Heinrich / Wernli, Johann Heinrich
ethz.date.deposited
2017-06-11T07:24:06Z
ethz.source
ECIT
ethz.identifier.importid
imp593651cf75d3290043
ethz.ecitpid
pub:130851
ethz.eth
yes
en_US
ethz.availability
Open access
en_US
ethz.rosetta.installDate
2017-07-13T11:21:15Z
ethz.rosetta.lastUpdated
2019-06-27T07:24:31Z
ethz.rosetta.versionExported
true
ethz.COinS
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