Evidence of Isotopic Fractionation During Vapor Exchange Between the Atmosphere and the Snow Surface in Greenland
Several recent studies from both Greenland and Antarctica have reported significant changes in the water isotopic composition of near‐surface snow between precipitation events. These changes have been linked to isotopic exchange with atmospheric water vapor and sublimation‐induced fractionation, but...
Published in: | Journal of Geophysical Research: Atmospheres |
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Online Access: | https://hdl.handle.net/1956/20285 https://doi.org/10.1029/2018jd029619 |
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ftunivbergen:oai:bora.uib.no:1956/20285 2023-05-15T13:58:10+02:00 Evidence of Isotopic Fractionation During Vapor Exchange Between the Atmosphere and the Snow Surface in Greenland Madsen, M.V. Steen‐Larsen, H.C. Hörhold, M. Box, J. Berben, Sarah Miche Patricia Capron, E. Faber, Anne-Katrine Hubbard, Alun Lloyd Jensen, Mari Fjalstad Jones, T.R. Kipfstuhl, S. Koldtoft, I. Pillar, H.R. Vaughn, B.H. Vladimirova, D. Dahl‐Jensen, D. 2019-04-24T08:30:15Z application/pdf https://hdl.handle.net/1956/20285 https://doi.org/10.1029/2018jd029619 eng eng Wiley EC/H2020: 759526 Norges forskningsråd: 223259 urn:issn:2169-897X urn:issn:2169-8996 https://hdl.handle.net/1956/20285 https://doi.org/10.1029/2018jd029619 cristin:1687601 Attribution CC BY-NC-ND http://creativecommons.org/licenses/by-nc-nd/4.0/ Copyright 2019 The Author(s) Journal of Geophysical Research - Atmospheres Peer reviewed Journal article 2019 ftunivbergen https://doi.org/10.1029/2018jd029619 2023-03-14T17:44:55Z Several recent studies from both Greenland and Antarctica have reported significant changes in the water isotopic composition of near‐surface snow between precipitation events. These changes have been linked to isotopic exchange with atmospheric water vapor and sublimation‐induced fractionation, but the processes are poorly constrained by observations. Understanding and quantifying these processes are crucial to both the interpretation of ice core climate proxies and the formulation of isotope‐enabled general circulation models. Here, we present continuous measurements of the water isotopic composition in surface snow and atmospheric vapor together with near‐surface atmospheric turbulence and snow‐air latent and sensible heat fluxes, obtained at the East Greenland Ice‐Core Project drilling site in summer 2016. For two 4‐day‐long time periods, significant diurnal variations in atmospheric water isotopologues are observed. A model is developed to explore the impact of this variability on the surface snow isotopic composition. Our model suggests that the snow isotopic composition in the upper subcentimeter of the snow exhibits a diurnal variation with amplitudes in δ18O and δD of ~2.5‰ and ~13‰, respectively. As comparison, such changes correspond to 10–20% of the magnitude of seasonal changes in interior Greenland snow pack isotopes and of the change across a glacial‐interglacial transition. Importantly, our observation and model results suggest, that sublimation‐induced fractionation needs to be included in simulations of exchanges between the vapor and the snow surface on diurnal timescales during summer cloud‐free conditions in northeast Greenland publishedVersion Article in Journal/Newspaper Antarc* Antarctica East Greenland East Greenland Ice-core Project Greenland Greenland ice core Greenland Ice core Project ice core University of Bergen: Bergen Open Research Archive (BORA-UiB) Greenland Journal of Geophysical Research: Atmospheres 124 6 2932 2945 |
institution |
Open Polar |
collection |
University of Bergen: Bergen Open Research Archive (BORA-UiB) |
op_collection_id |
ftunivbergen |
language |
English |
description |
Several recent studies from both Greenland and Antarctica have reported significant changes in the water isotopic composition of near‐surface snow between precipitation events. These changes have been linked to isotopic exchange with atmospheric water vapor and sublimation‐induced fractionation, but the processes are poorly constrained by observations. Understanding and quantifying these processes are crucial to both the interpretation of ice core climate proxies and the formulation of isotope‐enabled general circulation models. Here, we present continuous measurements of the water isotopic composition in surface snow and atmospheric vapor together with near‐surface atmospheric turbulence and snow‐air latent and sensible heat fluxes, obtained at the East Greenland Ice‐Core Project drilling site in summer 2016. For two 4‐day‐long time periods, significant diurnal variations in atmospheric water isotopologues are observed. A model is developed to explore the impact of this variability on the surface snow isotopic composition. Our model suggests that the snow isotopic composition in the upper subcentimeter of the snow exhibits a diurnal variation with amplitudes in δ18O and δD of ~2.5‰ and ~13‰, respectively. As comparison, such changes correspond to 10–20% of the magnitude of seasonal changes in interior Greenland snow pack isotopes and of the change across a glacial‐interglacial transition. Importantly, our observation and model results suggest, that sublimation‐induced fractionation needs to be included in simulations of exchanges between the vapor and the snow surface on diurnal timescales during summer cloud‐free conditions in northeast Greenland publishedVersion |
format |
Article in Journal/Newspaper |
author |
Madsen, M.V. Steen‐Larsen, H.C. Hörhold, M. Box, J. Berben, Sarah Miche Patricia Capron, E. Faber, Anne-Katrine Hubbard, Alun Lloyd Jensen, Mari Fjalstad Jones, T.R. Kipfstuhl, S. Koldtoft, I. Pillar, H.R. Vaughn, B.H. Vladimirova, D. Dahl‐Jensen, D. |
spellingShingle |
Madsen, M.V. Steen‐Larsen, H.C. Hörhold, M. Box, J. Berben, Sarah Miche Patricia Capron, E. Faber, Anne-Katrine Hubbard, Alun Lloyd Jensen, Mari Fjalstad Jones, T.R. Kipfstuhl, S. Koldtoft, I. Pillar, H.R. Vaughn, B.H. Vladimirova, D. Dahl‐Jensen, D. Evidence of Isotopic Fractionation During Vapor Exchange Between the Atmosphere and the Snow Surface in Greenland |
author_facet |
Madsen, M.V. Steen‐Larsen, H.C. Hörhold, M. Box, J. Berben, Sarah Miche Patricia Capron, E. Faber, Anne-Katrine Hubbard, Alun Lloyd Jensen, Mari Fjalstad Jones, T.R. Kipfstuhl, S. Koldtoft, I. Pillar, H.R. Vaughn, B.H. Vladimirova, D. Dahl‐Jensen, D. |
author_sort |
Madsen, M.V. |
title |
Evidence of Isotopic Fractionation During Vapor Exchange Between the Atmosphere and the Snow Surface in Greenland |
title_short |
Evidence of Isotopic Fractionation During Vapor Exchange Between the Atmosphere and the Snow Surface in Greenland |
title_full |
Evidence of Isotopic Fractionation During Vapor Exchange Between the Atmosphere and the Snow Surface in Greenland |
title_fullStr |
Evidence of Isotopic Fractionation During Vapor Exchange Between the Atmosphere and the Snow Surface in Greenland |
title_full_unstemmed |
Evidence of Isotopic Fractionation During Vapor Exchange Between the Atmosphere and the Snow Surface in Greenland |
title_sort |
evidence of isotopic fractionation during vapor exchange between the atmosphere and the snow surface in greenland |
publisher |
Wiley |
publishDate |
2019 |
url |
https://hdl.handle.net/1956/20285 https://doi.org/10.1029/2018jd029619 |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Antarc* Antarctica East Greenland East Greenland Ice-core Project Greenland Greenland ice core Greenland Ice core Project ice core |
genre_facet |
Antarc* Antarctica East Greenland East Greenland Ice-core Project Greenland Greenland ice core Greenland Ice core Project ice core |
op_source |
Journal of Geophysical Research - Atmospheres |
op_relation |
EC/H2020: 759526 Norges forskningsråd: 223259 urn:issn:2169-897X urn:issn:2169-8996 https://hdl.handle.net/1956/20285 https://doi.org/10.1029/2018jd029619 cristin:1687601 |
op_rights |
Attribution CC BY-NC-ND http://creativecommons.org/licenses/by-nc-nd/4.0/ Copyright 2019 The Author(s) |
op_doi |
https://doi.org/10.1029/2018jd029619 |
container_title |
Journal of Geophysical Research: Atmospheres |
container_volume |
124 |
container_issue |
6 |
container_start_page |
2932 |
op_container_end_page |
2945 |
_version_ |
1766266270253056000 |