Interannual variation of water isotopologues at Vostok indicates a contribution from stratospheric water vapor

Combined measurements of water isotopologues of a snow pit at Vostok over the past 60 y reveal a unique signature that cannot be explained only by climatic features as usually done. Comparisons of the data using a general circulation model and a simpler isotopic distillation model reveal a stratosph...

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Bibliographic Details
Published in:Proceedings of the National Academy of Sciences - PNAS 2013-10, Vol.110 (44), p.17674-17679
Main Authors: Winkler, Renato, Landais, Amaelle, Risi, Camille, Baroni, Melanie, Ekaykin, Alexey, Jouzel, Jean, Petite, Jean Robert, Prie, Frederic, Minster, Benedicte, Falourd, Sonia
Format: Article
Language:English
Subjects:
Antarctic Regions
Atmosphere - analysis
Beryllium
CHEMISTRY AND APPLICATIONS IN NATURE OF MASS INDEPENDENT ISOTOPE EFFECTS SPECIAL FEATURE
Climate models
Comparative analysis
Computer Simulation
Fractionation
Ice cores
Isotopes
Isotopes - chemistry
Models, Chemical
Ocean, Atmosphere
Physical Sciences
Precipitation
Relative humidity
Sciences of the Universe
Snow
Snow - chemistry
Steam - analysis
Stratosphere
Troposphere
Water vapor
Wind
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Summary:Combined measurements of water isotopologues of a snow pit at Vostok over the past 60 y reveal a unique signature that cannot be explained only by climatic features as usually done. Comparisons of the data using a general circulation model and a simpler isotopic distillation model reveal a stratospheric signature in the 17 O-excess record at Vostok. Our data and theoretical considerations indicate that mass-independent fractionation imprints the isotopic signature of stratospheric water vapor, which may allow for a distinction between stratospheric and tropospheric influences at remote East Antarctic sites.
ISSN:0027-8424
1091-6490
DOI:10.1073/pnas.1215209110