Interannual variation of water isotopologues at Vostok indicates a contribution from stratospheric water vapor.
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- Record sourced from PubMed, PMID 23798406.
- Also identified by DOI 10.1073/pnas.1215209110 and PMC identifier 3816450.
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Abstract
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.
Medical subject headings
- Atmosphere
- Models, Chemical
- Snow
- Steam