Atmosphere‐Snow Exchange Explains Surface Snow Isotope Variability
The climate signal imprinted in the snow isotopic composition allows to infer past climate variability from ice core stable water isotope records. The concurrent evolution of vapor and surface snow isotopic composition between precipitation events indicates that post‐depositional atmosphere‐snow hum...
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ftpubmed:oai:pubmedcentral.nih.gov:9787379 2023-05-15T16:29:05+02:00 Atmosphere‐Snow Exchange Explains Surface Snow Isotope Variability Wahl, S. Steen‐Larsen, H. C. Hughes, A. G. Dietrich, L. J. Zuhr, A. Behrens, M. Faber, A.‐K. Hörhold, M. 2022-10-18 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC9787379/ https://doi.org/10.1029/2022GL099529 en eng John Wiley and Sons Inc. http://www.ncbi.nlm.nih.gov/pmc/articles/PMC9787379/ http://dx.doi.org/10.1029/2022GL099529 © 2022. The Authors. https://creativecommons.org/licenses/by/4.0/This is an open access article under the terms of the http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited. CC-BY Geophys Res Lett Research Letter Text 2022 ftpubmed https://doi.org/10.1029/2022GL099529 2023-01-01T01:33:59Z The climate signal imprinted in the snow isotopic composition allows to infer past climate variability from ice core stable water isotope records. The concurrent evolution of vapor and surface snow isotopic composition between precipitation events indicates that post‐depositional atmosphere‐snow humidity exchange influences the snow and hence the ice core isotope signal. To date, however, this is not accounted for in paeleoclimate reconstructions from isotope records. Here we show that vapor‐snow exchange explains 36% of the summertime day‐to‐day δ(18)O variability of the surface snow between precipitation events, and 53% of the δD variability. Through observations from the Greenland Ice Sheet and accompanying modeling we demonstrate that vapor‐snow exchange introduces a warm bias on the summertime snow isotope value relevant for ice core records. In case of long‐term variability in atmosphere‐snow exchange the relevance for the ice core signal is also variable and thus paleoclimate reconstructions from isotope records should be revisited. Text Greenland ice core Ice Sheet PubMed Central (PMC) Greenland Geophysical Research Letters 49 20 |
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Research Letter |
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Research Letter Wahl, S. Steen‐Larsen, H. C. Hughes, A. G. Dietrich, L. J. Zuhr, A. Behrens, M. Faber, A.‐K. Hörhold, M. Atmosphere‐Snow Exchange Explains Surface Snow Isotope Variability |
topic_facet |
Research Letter |
description |
The climate signal imprinted in the snow isotopic composition allows to infer past climate variability from ice core stable water isotope records. The concurrent evolution of vapor and surface snow isotopic composition between precipitation events indicates that post‐depositional atmosphere‐snow humidity exchange influences the snow and hence the ice core isotope signal. To date, however, this is not accounted for in paeleoclimate reconstructions from isotope records. Here we show that vapor‐snow exchange explains 36% of the summertime day‐to‐day δ(18)O variability of the surface snow between precipitation events, and 53% of the δD variability. Through observations from the Greenland Ice Sheet and accompanying modeling we demonstrate that vapor‐snow exchange introduces a warm bias on the summertime snow isotope value relevant for ice core records. In case of long‐term variability in atmosphere‐snow exchange the relevance for the ice core signal is also variable and thus paleoclimate reconstructions from isotope records should be revisited. |
format |
Text |
author |
Wahl, S. Steen‐Larsen, H. C. Hughes, A. G. Dietrich, L. J. Zuhr, A. Behrens, M. Faber, A.‐K. Hörhold, M. |
author_facet |
Wahl, S. Steen‐Larsen, H. C. Hughes, A. G. Dietrich, L. J. Zuhr, A. Behrens, M. Faber, A.‐K. Hörhold, M. |
author_sort |
Wahl, S. |
title |
Atmosphere‐Snow Exchange Explains Surface Snow Isotope Variability |
title_short |
Atmosphere‐Snow Exchange Explains Surface Snow Isotope Variability |
title_full |
Atmosphere‐Snow Exchange Explains Surface Snow Isotope Variability |
title_fullStr |
Atmosphere‐Snow Exchange Explains Surface Snow Isotope Variability |
title_full_unstemmed |
Atmosphere‐Snow Exchange Explains Surface Snow Isotope Variability |
title_sort |
atmosphere‐snow exchange explains surface snow isotope variability |
publisher |
John Wiley and Sons Inc. |
publishDate |
2022 |
url |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC9787379/ https://doi.org/10.1029/2022GL099529 |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Greenland ice core Ice Sheet |
genre_facet |
Greenland ice core Ice Sheet |
op_source |
Geophys Res Lett |
op_relation |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC9787379/ http://dx.doi.org/10.1029/2022GL099529 |
op_rights |
© 2022. The Authors. https://creativecommons.org/licenses/by/4.0/This is an open access article under the terms of the http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited. |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1029/2022GL099529 |
container_title |
Geophysical Research Letters |
container_volume |
49 |
container_issue |
20 |
_version_ |
1766018769914691584 |