Quantifying the Stable Water Isotopologue Exchange Between the Snow Surface and Lower Atmosphere by Direct Flux Measurements
Surface processes in high latitudes play an important role in global climate and thus understanding the physics of these systems is critical for improving climate projections. The characterization of the stable water isotopologue flux between the surface and the atmosphere offers the potential to co...
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Online Access: | https://hdl.handle.net/11250/2989821 https://doi.org/10.1029/2020JD034400 |
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ftunivbergen:oai:bora.uib.no:11250/2989821 2023-05-15T16:03:52+02:00 Quantifying the Stable Water Isotopologue Exchange Between the Snow Surface and Lower Atmosphere by Direct Flux Measurements Wahl, Sonja Steen-Larsen, Hans Christian Reuder, Joachim Hörhold, Maria 2021 application/pdf https://hdl.handle.net/11250/2989821 https://doi.org/10.1029/2020JD034400 eng eng AGU ERC-European Research Council: 759526 urn:issn:2169-897X https://hdl.handle.net/11250/2989821 https://doi.org/10.1029/2020JD034400 cristin:1953317 Journal of Geophysical Research (JGR): Atmospheres. 2021, 126 (13), e2020JD034400 Navngivelse 4.0 Internasjonal http://creativecommons.org/licenses/by/4.0/deed.no Copyright 2021 The Author(s) e2020JD034400 Journal of Geophysical Research (JGR): Atmospheres 126 13 VDP::Petroleumsgeologi og -geofysikk: 464 VDP::Petroleum geology and geophysics: 464 Journal article Peer reviewed 2021 ftunivbergen https://doi.org/10.1029/2020JD034400 2023-03-14T17:38:59Z Surface processes in high latitudes play an important role in global climate and thus understanding the physics of these systems is critical for improving climate projections. The characterization of the stable water isotopologue flux between the surface and the atmosphere offers the potential to constrain parameterizations of these physical surface exchange processes in numerical models. In addition, observations of isotopologue surface fluxes allow the evaluation of surface fluxes as a process influencing the formation of the climate signal retrieved from ice core isotopologue records. Here, we present a record of stable water isotopologue surface fluxes measured in-situ in the accumulation zone of the Greenland Ice Sheet at the East Greenland Ice Core Project site. We measured isotopologue fluxes above the snow surface directly by combining high-frequency eddy covariance measurements with low-frequency isotopologue measurements from a cavity ring-down spectrometer (CRDS). We developed a method to correct for the high-frequency loss of the CRDS by combining humidity measurements from both the CRDS and eddy covariance instruments. Using this approach our measurements provide the first direct observations of water isotopologue fluxes in polar areas. We observed a clear diurnal cycle in the fluxes of the different water isotopologues. The isotopic composition of the sublimation and deposition flux showed to be dependent on the snow and vapor isotopic composition, respectively. To a first order, the isotopic composition of the sublimation flux could be derived assuming equilibrium fractionation during sublimation. publishedVersion Article in Journal/Newspaper East Greenland East Greenland Ice-core Project Greenland Greenland ice core Greenland Ice core Project ice core Ice Sheet University of Bergen: Bergen Open Research Archive (BORA-UiB) Greenland Journal of Geophysical Research: Atmospheres 126 13 |
institution |
Open Polar |
collection |
University of Bergen: Bergen Open Research Archive (BORA-UiB) |
op_collection_id |
ftunivbergen |
language |
English |
topic |
VDP::Petroleumsgeologi og -geofysikk: 464 VDP::Petroleum geology and geophysics: 464 |
spellingShingle |
VDP::Petroleumsgeologi og -geofysikk: 464 VDP::Petroleum geology and geophysics: 464 Wahl, Sonja Steen-Larsen, Hans Christian Reuder, Joachim Hörhold, Maria Quantifying the Stable Water Isotopologue Exchange Between the Snow Surface and Lower Atmosphere by Direct Flux Measurements |
topic_facet |
VDP::Petroleumsgeologi og -geofysikk: 464 VDP::Petroleum geology and geophysics: 464 |
description |
Surface processes in high latitudes play an important role in global climate and thus understanding the physics of these systems is critical for improving climate projections. The characterization of the stable water isotopologue flux between the surface and the atmosphere offers the potential to constrain parameterizations of these physical surface exchange processes in numerical models. In addition, observations of isotopologue surface fluxes allow the evaluation of surface fluxes as a process influencing the formation of the climate signal retrieved from ice core isotopologue records. Here, we present a record of stable water isotopologue surface fluxes measured in-situ in the accumulation zone of the Greenland Ice Sheet at the East Greenland Ice Core Project site. We measured isotopologue fluxes above the snow surface directly by combining high-frequency eddy covariance measurements with low-frequency isotopologue measurements from a cavity ring-down spectrometer (CRDS). We developed a method to correct for the high-frequency loss of the CRDS by combining humidity measurements from both the CRDS and eddy covariance instruments. Using this approach our measurements provide the first direct observations of water isotopologue fluxes in polar areas. We observed a clear diurnal cycle in the fluxes of the different water isotopologues. The isotopic composition of the sublimation and deposition flux showed to be dependent on the snow and vapor isotopic composition, respectively. To a first order, the isotopic composition of the sublimation flux could be derived assuming equilibrium fractionation during sublimation. publishedVersion |
format |
Article in Journal/Newspaper |
author |
Wahl, Sonja Steen-Larsen, Hans Christian Reuder, Joachim Hörhold, Maria |
author_facet |
Wahl, Sonja Steen-Larsen, Hans Christian Reuder, Joachim Hörhold, Maria |
author_sort |
Wahl, Sonja |
title |
Quantifying the Stable Water Isotopologue Exchange Between the Snow Surface and Lower Atmosphere by Direct Flux Measurements |
title_short |
Quantifying the Stable Water Isotopologue Exchange Between the Snow Surface and Lower Atmosphere by Direct Flux Measurements |
title_full |
Quantifying the Stable Water Isotopologue Exchange Between the Snow Surface and Lower Atmosphere by Direct Flux Measurements |
title_fullStr |
Quantifying the Stable Water Isotopologue Exchange Between the Snow Surface and Lower Atmosphere by Direct Flux Measurements |
title_full_unstemmed |
Quantifying the Stable Water Isotopologue Exchange Between the Snow Surface and Lower Atmosphere by Direct Flux Measurements |
title_sort |
quantifying the stable water isotopologue exchange between the snow surface and lower atmosphere by direct flux measurements |
publisher |
AGU |
publishDate |
2021 |
url |
https://hdl.handle.net/11250/2989821 https://doi.org/10.1029/2020JD034400 |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
East Greenland East Greenland Ice-core Project Greenland Greenland ice core Greenland Ice core Project ice core Ice Sheet |
genre_facet |
East Greenland East Greenland Ice-core Project Greenland Greenland ice core Greenland Ice core Project ice core Ice Sheet |
op_source |
e2020JD034400 Journal of Geophysical Research (JGR): Atmospheres 126 13 |
op_relation |
ERC-European Research Council: 759526 urn:issn:2169-897X https://hdl.handle.net/11250/2989821 https://doi.org/10.1029/2020JD034400 cristin:1953317 Journal of Geophysical Research (JGR): Atmospheres. 2021, 126 (13), e2020JD034400 |
op_rights |
Navngivelse 4.0 Internasjonal http://creativecommons.org/licenses/by/4.0/deed.no Copyright 2021 The Author(s) |
op_doi |
https://doi.org/10.1029/2020JD034400 |
container_title |
Journal of Geophysical Research: Atmospheres |
container_volume |
126 |
container_issue |
13 |
_version_ |
1766399554590081024 |