The summer 2012 Greenland heat wave: In situ and remote sensing observations of water vapor isotopic composition during an atmospheric river event
Abstract During 7-12 July 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 vapor isotopic composition using surface in situ observatio...
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ftunivbruxelles:oai:dipot.ulb.ac.be:2013/205454 2023-05-15T16:24:19+02:00 The summer 2012 Greenland heat wave: In situ and remote sensing observations of water vapor isotopic composition during an atmospheric river event Bonne, Jean-Louis Cattani, Olivier Vallelonga, Paul Kjær, Helle Astrid Clerbaux, Cathy Sveinbjörnsdõttir, Árny Erla Masson-Delmotte, Valérie Steen-Larsen, Hans-Christian Risi, Camille Werner, Martin Sodemann, Harald Lacour, Jean Lionel Fettweis, Xavier Cesana, Grégory Delmotte, Marc 2015-04 1 full-text file(s): application/pdf http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/205454 https://dipot.ulb.ac.be/dspace/bitstream/2013/205454/3/205454.pdf en eng uri/info:doi/10.1002/2014JD022602 uri/info:scp/84928611420 https://dipot.ulb.ac.be/dspace/bitstream/2013/205454/3/205454.pdf http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/205454 1 full-text file(s): info:eu-repo/semantics/restrictedAccess Journal of Geophysical Research: Atmospheres, 120 (7 Sciences de l'espace Phénomènes atmosphériques Géographie physique Sciences de la terre et du cosmos atmospheric river Greenland water isotopes info:eu-repo/semantics/article info:ulb-repo/semantics/articlePeerReview info:ulb-repo/semantics/openurl/article 2015 ftunivbruxelles 2022-06-12T20:41:01Z Abstract During 7-12 July 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 vapor 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 (Infrared Atmospheric Sounding Interferometer (IASI) instrument on board MetOp-A), depicting propagation of similar surface and midtropospheric 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 vapor isotopic composition. Our data demonstrate that during this atmospheric river event the deuterium excess signal is conserved from the moisture source to northwest Greenland. Key Points Water vapor isotopic fingerprint of Greenland summer 2012 atmospheric river Surface and remote sensing observations and models depict similar patterns Strong influence of subtropical North ... Article in Journal/Newspaper Greenland Ice Sheet Ivittuut North Atlantic DI-fusion : dépôt institutionnel de l'Université libre de Bruxelles (ULB) Greenland |
institution |
Open Polar |
collection |
DI-fusion : dépôt institutionnel de l'Université libre de Bruxelles (ULB) |
op_collection_id |
ftunivbruxelles |
language |
English |
topic |
Sciences de l'espace Phénomènes atmosphériques Géographie physique Sciences de la terre et du cosmos atmospheric river Greenland water isotopes |
spellingShingle |
Sciences de l'espace Phénomènes atmosphériques Géographie physique Sciences de la terre et du cosmos atmospheric river Greenland water isotopes Bonne, Jean-Louis Cattani, Olivier Vallelonga, Paul Kjær, Helle Astrid Clerbaux, Cathy Sveinbjörnsdõttir, Árny Erla Masson-Delmotte, Valérie Steen-Larsen, Hans-Christian Risi, Camille Werner, Martin Sodemann, Harald Lacour, Jean Lionel Fettweis, Xavier Cesana, Grégory Delmotte, Marc The summer 2012 Greenland heat wave: In situ and remote sensing observations of water vapor isotopic composition during an atmospheric river event |
topic_facet |
Sciences de l'espace Phénomènes atmosphériques Géographie physique Sciences de la terre et du cosmos atmospheric river Greenland water isotopes |
description |
Abstract During 7-12 July 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 vapor 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 (Infrared Atmospheric Sounding Interferometer (IASI) instrument on board MetOp-A), depicting propagation of similar surface and midtropospheric 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 vapor isotopic composition. Our data demonstrate that during this atmospheric river event the deuterium excess signal is conserved from the moisture source to northwest Greenland. Key Points Water vapor isotopic fingerprint of Greenland summer 2012 atmospheric river Surface and remote sensing observations and models depict similar patterns Strong influence of subtropical North ... |
format |
Article in Journal/Newspaper |
author |
Bonne, Jean-Louis Cattani, Olivier Vallelonga, Paul Kjær, Helle Astrid Clerbaux, Cathy Sveinbjörnsdõttir, Árny Erla Masson-Delmotte, Valérie Steen-Larsen, Hans-Christian Risi, Camille Werner, Martin Sodemann, Harald Lacour, Jean Lionel Fettweis, Xavier Cesana, Grégory Delmotte, Marc |
author_facet |
Bonne, Jean-Louis Cattani, Olivier Vallelonga, Paul Kjær, Helle Astrid Clerbaux, Cathy Sveinbjörnsdõttir, Árny Erla Masson-Delmotte, Valérie Steen-Larsen, Hans-Christian Risi, Camille Werner, Martin Sodemann, Harald Lacour, Jean Lionel Fettweis, Xavier Cesana, Grégory Delmotte, Marc |
author_sort |
Bonne, Jean-Louis |
title |
The summer 2012 Greenland heat wave: In situ and remote sensing observations of water vapor isotopic composition during an atmospheric river event |
title_short |
The summer 2012 Greenland heat wave: In situ and remote sensing observations of water vapor isotopic composition during an atmospheric river event |
title_full |
The summer 2012 Greenland heat wave: In situ and remote sensing observations of water vapor isotopic composition during an atmospheric river event |
title_fullStr |
The summer 2012 Greenland heat wave: In situ and remote sensing observations of water vapor isotopic composition during an atmospheric river event |
title_full_unstemmed |
The summer 2012 Greenland heat wave: In situ and remote sensing observations of water vapor isotopic composition during an atmospheric river event |
title_sort |
summer 2012 greenland heat wave: in situ and remote sensing observations of water vapor isotopic composition during an atmospheric river event |
publishDate |
2015 |
url |
http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/205454 https://dipot.ulb.ac.be/dspace/bitstream/2013/205454/3/205454.pdf |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Greenland Ice Sheet Ivittuut North Atlantic |
genre_facet |
Greenland Ice Sheet Ivittuut North Atlantic |
op_source |
Journal of Geophysical Research: Atmospheres, 120 (7 |
op_relation |
uri/info:doi/10.1002/2014JD022602 uri/info:scp/84928611420 https://dipot.ulb.ac.be/dspace/bitstream/2013/205454/3/205454.pdf http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/205454 |
op_rights |
1 full-text file(s): info:eu-repo/semantics/restrictedAccess |
_version_ |
1766012737115127808 |