The summer 2012 Greenland heat wave: in situ and remote sensing observations of water vapour isotopic composition during an atmospheric river event†
peer reviewed During July 7-12, 2012, extreme moist and warm conditions occurred over Greenland, leading to widespread surface melt. To investigate the physical processes during the atmospheric moisture transport of this event, we study the water vapour isotopic composition using surface in situ obs...
Published in: | Journal of Geophysical Research: Atmospheres |
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Online Access: | https://orbi.uliege.be/handle/2268/178827 https://doi.org/10.1002/2014JD022602 |
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ftorbi:oai:orbi.ulg.ac.be:2268/178827 2024-04-21T08:02:59+00:00 The summer 2012 Greenland heat wave: in situ and remote sensing observations of water vapour isotopic composition during an atmospheric river event† Bonne, JL Steen-Larsen, HC Risi, C. Werner, M. Sodemann, H. Lacour, J.L. Fettweis, Xavier Cesana, G. Delmotte, M. Cattani, O. Vallelonga, P. Kjær, H.E. Clerbaux, C. Sveinbjörnsdóttirffilmark, A.E. Masson-Delmotte, V. 2015-02-01 https://orbi.uliege.be/handle/2268/178827 https://doi.org/10.1002/2014JD022602 en eng Wiley http://onlinelibrary.wiley.com/doi/10.1002/2014JD022602/abstract urn:issn:2169-897X urn:issn:2169-8996 https://orbi.uliege.be/handle/2268/178827 info:hdl:2268/178827 doi:10.1002/2014JD022602 scopus-id:2-s2.0-84928611420 restricted access http://purl.org/coar/access_right/c_16ec info:eu-repo/semantics/restrictedAccess Journal of Geophysical Research. Atmospheres (2015-02-01) Physical chemical mathematical & earth Sciences Earth sciences & physical geography Physique chimie mathématiques & sciences de la terre Sciences de la terre & géographie physique journal article http://purl.org/coar/resource_type/c_6501 info:eu-repo/semantics/article peer reviewed 2015 ftorbi https://doi.org/10.1002/2014JD022602 2024-03-27T14:56:39Z peer reviewed During July 7-12, 2012, extreme moist and warm conditions occurred over Greenland, leading to widespread surface melt. To investigate the physical processes during the atmospheric moisture transport of this event, we study the water vapour isotopic composition using surface in situ observations in Bermuda Island, South Greenland coast (Ivittuut) and Northwest Greenland ice sheet (NEEM), as well as remote sensing observations (IASI instrument on-board MetOp-A), depicting propagation of similar surface and mid-tropospheric humidity and δD signals. Simulations using Lagrangian moisture source diagnostic and water tagging in a regional model showed that Greenland was affected by an atmospheric river transporting moisture from the western subtropical North Atlantic Ocean, which is coherent with observations of snow pit impurities deposited at NEEM. At Ivittuut, surface air temperature, humidity and δD increases are observed. At NEEM, similar temperature increase is associated with a large and long-lasting ~100 δD enrichment and ~15 deuterium excess decrease, thereby reaching Ivittuut level. We assess the simulation of this event in two isotope-enabled atmospheric general circulation models (LMDz-iso and ECHAM5-wiso). LMDz-iso correctly captures the timing of propagation for this event identified in IASI data but depict too gradual variations when compared to surface data. Both models reproduce the surface meteorological and isotopic values during the event but underestimate the background deuterium excess at NEEM. Cloud liquid water content parametrization in LMDz-iso poorly impacts the vapour isotopic composition. Our data demonstrate that during this atmospheric river event the deuterium excess signal is conserved from the moisture source to Northwest Greenland. Article in Journal/Newspaper Greenland Ice Sheet Ivittuut North Atlantic University of Liège: ORBi (Open Repository and Bibliography) Journal of Geophysical Research: Atmospheres 120 7 2970 2989 |
institution |
Open Polar |
collection |
University of Liège: ORBi (Open Repository and Bibliography) |
op_collection_id |
ftorbi |
language |
English |
topic |
Physical chemical mathematical & earth Sciences Earth sciences & physical geography Physique chimie mathématiques & sciences de la terre Sciences de la terre & géographie physique |
spellingShingle |
Physical chemical mathematical & earth Sciences Earth sciences & physical geography Physique chimie mathématiques & sciences de la terre Sciences de la terre & géographie physique Bonne, JL Steen-Larsen, HC Risi, C. Werner, M. Sodemann, H. Lacour, J.L. Fettweis, Xavier Cesana, G. Delmotte, M. Cattani, O. Vallelonga, P. Kjær, H.E. Clerbaux, C. Sveinbjörnsdóttirffilmark, A.E. Masson-Delmotte, V. The summer 2012 Greenland heat wave: in situ and remote sensing observations of water vapour isotopic composition during an atmospheric river event† |
topic_facet |
Physical chemical mathematical & earth Sciences Earth sciences & physical geography Physique chimie mathématiques & sciences de la terre Sciences de la terre & géographie physique |
description |
peer reviewed During July 7-12, 2012, extreme moist and warm conditions occurred over Greenland, leading to widespread surface melt. To investigate the physical processes during the atmospheric moisture transport of this event, we study the water vapour isotopic composition using surface in situ observations in Bermuda Island, South Greenland coast (Ivittuut) and Northwest Greenland ice sheet (NEEM), as well as remote sensing observations (IASI instrument on-board MetOp-A), depicting propagation of similar surface and mid-tropospheric humidity and δD signals. Simulations using Lagrangian moisture source diagnostic and water tagging in a regional model showed that Greenland was affected by an atmospheric river transporting moisture from the western subtropical North Atlantic Ocean, which is coherent with observations of snow pit impurities deposited at NEEM. At Ivittuut, surface air temperature, humidity and δD increases are observed. At NEEM, similar temperature increase is associated with a large and long-lasting ~100 δD enrichment and ~15 deuterium excess decrease, thereby reaching Ivittuut level. We assess the simulation of this event in two isotope-enabled atmospheric general circulation models (LMDz-iso and ECHAM5-wiso). LMDz-iso correctly captures the timing of propagation for this event identified in IASI data but depict too gradual variations when compared to surface data. Both models reproduce the surface meteorological and isotopic values during the event but underestimate the background deuterium excess at NEEM. Cloud liquid water content parametrization in LMDz-iso poorly impacts the vapour isotopic composition. Our data demonstrate that during this atmospheric river event the deuterium excess signal is conserved from the moisture source to Northwest Greenland. |
format |
Article in Journal/Newspaper |
author |
Bonne, JL Steen-Larsen, HC Risi, C. Werner, M. Sodemann, H. Lacour, J.L. Fettweis, Xavier Cesana, G. Delmotte, M. Cattani, O. Vallelonga, P. Kjær, H.E. Clerbaux, C. Sveinbjörnsdóttirffilmark, A.E. Masson-Delmotte, V. |
author_facet |
Bonne, JL Steen-Larsen, HC Risi, C. Werner, M. Sodemann, H. Lacour, J.L. Fettweis, Xavier Cesana, G. Delmotte, M. Cattani, O. Vallelonga, P. Kjær, H.E. Clerbaux, C. Sveinbjörnsdóttirffilmark, A.E. Masson-Delmotte, V. |
author_sort |
Bonne, JL |
title |
The summer 2012 Greenland heat wave: in situ and remote sensing observations of water vapour isotopic composition during an atmospheric river event† |
title_short |
The summer 2012 Greenland heat wave: in situ and remote sensing observations of water vapour isotopic composition during an atmospheric river event† |
title_full |
The summer 2012 Greenland heat wave: in situ and remote sensing observations of water vapour isotopic composition during an atmospheric river event† |
title_fullStr |
The summer 2012 Greenland heat wave: in situ and remote sensing observations of water vapour isotopic composition during an atmospheric river event† |
title_full_unstemmed |
The summer 2012 Greenland heat wave: in situ and remote sensing observations of water vapour isotopic composition during an atmospheric river event† |
title_sort |
summer 2012 greenland heat wave: in situ and remote sensing observations of water vapour isotopic composition during an atmospheric river event† |
publisher |
Wiley |
publishDate |
2015 |
url |
https://orbi.uliege.be/handle/2268/178827 https://doi.org/10.1002/2014JD022602 |
genre |
Greenland Ice Sheet Ivittuut North Atlantic |
genre_facet |
Greenland Ice Sheet Ivittuut North Atlantic |
op_source |
Journal of Geophysical Research. Atmospheres (2015-02-01) |
op_relation |
http://onlinelibrary.wiley.com/doi/10.1002/2014JD022602/abstract urn:issn:2169-897X urn:issn:2169-8996 https://orbi.uliege.be/handle/2268/178827 info:hdl:2268/178827 doi:10.1002/2014JD022602 scopus-id:2-s2.0-84928611420 |
op_rights |
restricted access http://purl.org/coar/access_right/c_16ec info:eu-repo/semantics/restrictedAccess |
op_doi |
https://doi.org/10.1002/2014JD022602 |
container_title |
Journal of Geophysical Research: Atmospheres |
container_volume |
120 |
container_issue |
7 |
container_start_page |
2970 |
op_container_end_page |
2989 |
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1796943011811164160 |