Continuous monitoring of summer surface water vapor isotopic composition above the Greenland Ice Sheet
We present here surface water vapor isotopic measurements conducted from June to August 2010 at the NEEM (North Greenland Eemian Drilling Project) camp, NW Greenland (77.45° N, 51.05° W, 2484 m a.s.l.). Measurements were conducted at 9 different heights from 0.1 m to 13.5 m above the snow surface us...
Published in: | Atmospheric Chemistry and Physics |
---|---|
Main Authors: | , , , , , , , , , , , , , , , , , , , , , , |
Format: | Text |
Language: | English |
Published: |
2018
|
Subjects: | |
Online Access: | https://doi.org/10.5194/acp-13-4815-2013 https://www.atmos-chem-phys.net/13/4815/2013/ |
id |
ftcopernicus:oai:publications.copernicus.org:acp17628 |
---|---|
record_format |
openpolar |
spelling |
ftcopernicus:oai:publications.copernicus.org:acp17628 2023-05-15T15:08:27+02:00 Continuous monitoring of summer surface water vapor isotopic composition above the Greenland Ice Sheet Steen-Larsen, H. C. Johnsen, S. J. Masson-Delmotte, V. Stenni, B. Risi, C. Sodemann, H. Balslev-Clausen, D. Blunier, T. Dahl-Jensen, D. Ellehøj, M. D. Falourd, S. Grindsted, A. Gkinis, V. Jouzel, J. Popp, T. Sheldon, S. Simonsen, S. B. Sjolte, J. Steffensen, J. P. Sperlich, P. Sveinbjörnsdóttir, A. E. Vinther, B. M. White, J. W. C. 2018-01-15 application/pdf https://doi.org/10.5194/acp-13-4815-2013 https://www.atmos-chem-phys.net/13/4815/2013/ eng eng doi:10.5194/acp-13-4815-2013 https://www.atmos-chem-phys.net/13/4815/2013/ eISSN: 1680-7324 Text 2018 ftcopernicus https://doi.org/10.5194/acp-13-4815-2013 2019-12-24T09:55:22Z We present here surface water vapor isotopic measurements conducted from June to August 2010 at the NEEM (North Greenland Eemian Drilling Project) camp, NW Greenland (77.45° N, 51.05° W, 2484 m a.s.l.). Measurements were conducted at 9 different heights from 0.1 m to 13.5 m above the snow surface using two different types of cavity-enhanced near-infrared absorption spectroscopy analyzers. For each instrument specific protocols were developed for calibration and drift corrections. The inter-comparison of corrected results from different instruments reveals excellent reproducibility, stability, and precision with a standard deviations of ~ 0.23‰ for δ 18 O and ~ 1.4‰ for δD. Diurnal and intraseasonal variations show strong relationships between changes in local surface humidity and water vapor isotopic composition, and with local and synoptic weather conditions. This variability probably results from the interplay between local moisture fluxes, linked with firn–air exchanges, boundary layer dynamics, and large-scale moisture advection. Particularly remarkable are several episodes characterized by high (> 40‰) surface water vapor deuterium excess. Air mass back-trajectory calculations from atmospheric analyses and water tagging in the LMDZiso (Laboratory of Meteorology Dynamics Zoom-isotopic) atmospheric model reveal that these events are associated with predominant Arctic air mass origin. The analysis suggests that high deuterium excess levels are a result of strong kinetic fractionation during evaporation at the sea-ice margin. Text Arctic Greenland Ice Sheet North Greenland Sea ice Copernicus Publications: E-Journals Arctic Greenland Atmospheric Chemistry and Physics 13 9 4815 4828 |
institution |
Open Polar |
collection |
Copernicus Publications: E-Journals |
op_collection_id |
ftcopernicus |
language |
English |
description |
We present here surface water vapor isotopic measurements conducted from June to August 2010 at the NEEM (North Greenland Eemian Drilling Project) camp, NW Greenland (77.45° N, 51.05° W, 2484 m a.s.l.). Measurements were conducted at 9 different heights from 0.1 m to 13.5 m above the snow surface using two different types of cavity-enhanced near-infrared absorption spectroscopy analyzers. For each instrument specific protocols were developed for calibration and drift corrections. The inter-comparison of corrected results from different instruments reveals excellent reproducibility, stability, and precision with a standard deviations of ~ 0.23‰ for δ 18 O and ~ 1.4‰ for δD. Diurnal and intraseasonal variations show strong relationships between changes in local surface humidity and water vapor isotopic composition, and with local and synoptic weather conditions. This variability probably results from the interplay between local moisture fluxes, linked with firn–air exchanges, boundary layer dynamics, and large-scale moisture advection. Particularly remarkable are several episodes characterized by high (> 40‰) surface water vapor deuterium excess. Air mass back-trajectory calculations from atmospheric analyses and water tagging in the LMDZiso (Laboratory of Meteorology Dynamics Zoom-isotopic) atmospheric model reveal that these events are associated with predominant Arctic air mass origin. The analysis suggests that high deuterium excess levels are a result of strong kinetic fractionation during evaporation at the sea-ice margin. |
format |
Text |
author |
Steen-Larsen, H. C. Johnsen, S. J. Masson-Delmotte, V. Stenni, B. Risi, C. Sodemann, H. Balslev-Clausen, D. Blunier, T. Dahl-Jensen, D. Ellehøj, M. D. Falourd, S. Grindsted, A. Gkinis, V. Jouzel, J. Popp, T. Sheldon, S. Simonsen, S. B. Sjolte, J. Steffensen, J. P. Sperlich, P. Sveinbjörnsdóttir, A. E. Vinther, B. M. White, J. W. C. |
spellingShingle |
Steen-Larsen, H. C. Johnsen, S. J. Masson-Delmotte, V. Stenni, B. Risi, C. Sodemann, H. Balslev-Clausen, D. Blunier, T. Dahl-Jensen, D. Ellehøj, M. D. Falourd, S. Grindsted, A. Gkinis, V. Jouzel, J. Popp, T. Sheldon, S. Simonsen, S. B. Sjolte, J. Steffensen, J. P. Sperlich, P. Sveinbjörnsdóttir, A. E. Vinther, B. M. White, J. W. C. Continuous monitoring of summer surface water vapor isotopic composition above the Greenland Ice Sheet |
author_facet |
Steen-Larsen, H. C. Johnsen, S. J. Masson-Delmotte, V. Stenni, B. Risi, C. Sodemann, H. Balslev-Clausen, D. Blunier, T. Dahl-Jensen, D. Ellehøj, M. D. Falourd, S. Grindsted, A. Gkinis, V. Jouzel, J. Popp, T. Sheldon, S. Simonsen, S. B. Sjolte, J. Steffensen, J. P. Sperlich, P. Sveinbjörnsdóttir, A. E. Vinther, B. M. White, J. W. C. |
author_sort |
Steen-Larsen, H. C. |
title |
Continuous monitoring of summer surface water vapor isotopic composition above the Greenland Ice Sheet |
title_short |
Continuous monitoring of summer surface water vapor isotopic composition above the Greenland Ice Sheet |
title_full |
Continuous monitoring of summer surface water vapor isotopic composition above the Greenland Ice Sheet |
title_fullStr |
Continuous monitoring of summer surface water vapor isotopic composition above the Greenland Ice Sheet |
title_full_unstemmed |
Continuous monitoring of summer surface water vapor isotopic composition above the Greenland Ice Sheet |
title_sort |
continuous monitoring of summer surface water vapor isotopic composition above the greenland ice sheet |
publishDate |
2018 |
url |
https://doi.org/10.5194/acp-13-4815-2013 https://www.atmos-chem-phys.net/13/4815/2013/ |
geographic |
Arctic Greenland |
geographic_facet |
Arctic Greenland |
genre |
Arctic Greenland Ice Sheet North Greenland Sea ice |
genre_facet |
Arctic Greenland Ice Sheet North Greenland Sea ice |
op_source |
eISSN: 1680-7324 |
op_relation |
doi:10.5194/acp-13-4815-2013 https://www.atmos-chem-phys.net/13/4815/2013/ |
op_doi |
https://doi.org/10.5194/acp-13-4815-2013 |
container_title |
Atmospheric Chemistry and Physics |
container_volume |
13 |
container_issue |
9 |
container_start_page |
4815 |
op_container_end_page |
4828 |
_version_ |
1766339814572949504 |