Importance of boundary layer mixing for the isotopic composition of surface vapor over the subtropical North Atlantic Ocean
International audience During the summer 2012, we carried out continuous measurements of the isotopic composition (δ) of water vapor over the near-surface subtropical North Atlantic Ocean (STRASSE cruise). In this region of excess evaporation, we investigate the control of evaporation and mixing wit...
Published in: | Journal of Geophysical Research: Atmospheres |
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Main Authors: | , , , , |
Other Authors: | , , , , , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
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HAL CCSD
2015
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Subjects: | |
Online Access: | https://hal.sorbonne-universite.fr/hal-01137465 https://hal.sorbonne-universite.fr/hal-01137465/document https://hal.sorbonne-universite.fr/hal-01137465/file/Benetti_2015_Importance_of.pdf https://doi.org/10.1002/2014JD021947 |
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ftunivnantes:oai:HAL:hal-01137465v1 |
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openpolar |
institution |
Open Polar |
collection |
Université de Nantes: HAL-UNIV-NANTES |
op_collection_id |
ftunivnantes |
language |
English |
topic |
shallow convection evaporation water isotopes kinetic effects d-excess marine boundary layer [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [PHYS.PHYS.PHYS-GEO-PH]Physics [physics]/Physics [physics]/Geophysics [physics.geo-ph] |
spellingShingle |
shallow convection evaporation water isotopes kinetic effects d-excess marine boundary layer [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [PHYS.PHYS.PHYS-GEO-PH]Physics [physics]/Physics [physics]/Geophysics [physics.geo-ph] Benetti, Marion Aloisi, Giovanni Reverdin, Gilles Risi, Camille Sèze, Geneviève Importance of boundary layer mixing for the isotopic composition of surface vapor over the subtropical North Atlantic Ocean |
topic_facet |
shallow convection evaporation water isotopes kinetic effects d-excess marine boundary layer [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [PHYS.PHYS.PHYS-GEO-PH]Physics [physics]/Physics [physics]/Geophysics [physics.geo-ph] |
description |
International audience During the summer 2012, we carried out continuous measurements of the isotopic composition (δ) of water vapor over the near-surface subtropical North Atlantic Ocean (STRASSE cruise). In this region of excess evaporation, we investigate the control of evaporation and mixing with a lower troposphere-derived, isotopically depleted air mass on the near-surface δ. We use a simple model to simulate the near-surface δ as the result of a two end-member mixing of the evaporative flux with free tropospheric air. The evaporative flux δ was estimated by the Craig and Gordon equation while the δ of the lower troposphere was taken from the LMDZ-iso global atmospheric circulation model. This simulation considers instantaneous mixing of lower tropospheric air with the evaporated flux and neglects lateral advection. Despite these simplifications, the simulations allow to identify the controls on the near-surface δ. The d-excess variability is largely a consequence of varying kinetic effects during evaporation, even during a convection event when the input of tropospheric vapor was strong. Kinetic effects and mixing processes affect simultaneously the near-surface δ and result in the vapor occupying distinct domains in the δ 18 O-δD space. The relative humidity-d-excess relationship shows that the closure assumption overestimates the d-excess variability at short time scales (less than a day). We interpret this as due to an effect of the residence time of the near-surface water vapor on the d-excess. Finally, we highlight the importance of reproducing mixing processes in models simulating isotopes over the subtropical North Atlantic Ocean and propose an extension of the closure assumption for use in initial conditions of distillation calculations. |
author2 |
Laboratoire d'Océanographie et du Climat : Expérimentations et Approches Numériques (LOCEAN) Muséum national d'Histoire naturelle (MNHN)-Institut de Recherche pour le Développement (IRD)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Institut Pierre-Simon-Laplace (IPSL (FR_636)) École normale supérieure - Paris (ENS-PSL) Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris Diderot - Paris 7 (UPD7)-École polytechnique (X)-Centre National d'Études Spatiales Toulouse (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-École normale supérieure - Paris (ENS-PSL) Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris Diderot - Paris 7 (UPD7)-École polytechnique (X)-Centre National d'Études Spatiales Toulouse (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS) Biogéochimie-Traceurs-Paléoclimat (BTP) Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris Diderot - Paris 7 (UPD7)-École polytechnique (X)-Centre National d'Études Spatiales Toulouse (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Muséum national d'Histoire naturelle (MNHN)-Institut de Recherche pour le Développement (IRD)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Institut Pierre-Simon-Laplace (IPSL (FR_636)) Interactions et Processus au sein de la couche de Surface Océanique (IPSO) Laboratoire de Météorologie Dynamique (UMR 8539) (LMD) Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-École polytechnique (X)-École des Ponts ParisTech (ENPC)-Centre National de la Recherche Scientifique (CNRS)-Département des Géosciences - ENS Paris Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-École normale supérieure - Paris (ENS-PSL) Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL) TOSCA CNES |
format |
Article in Journal/Newspaper |
author |
Benetti, Marion Aloisi, Giovanni Reverdin, Gilles Risi, Camille Sèze, Geneviève |
author_facet |
Benetti, Marion Aloisi, Giovanni Reverdin, Gilles Risi, Camille Sèze, Geneviève |
author_sort |
Benetti, Marion |
title |
Importance of boundary layer mixing for the isotopic composition of surface vapor over the subtropical North Atlantic Ocean |
title_short |
Importance of boundary layer mixing for the isotopic composition of surface vapor over the subtropical North Atlantic Ocean |
title_full |
Importance of boundary layer mixing for the isotopic composition of surface vapor over the subtropical North Atlantic Ocean |
title_fullStr |
Importance of boundary layer mixing for the isotopic composition of surface vapor over the subtropical North Atlantic Ocean |
title_full_unstemmed |
Importance of boundary layer mixing for the isotopic composition of surface vapor over the subtropical North Atlantic Ocean |
title_sort |
importance of boundary layer mixing for the isotopic composition of surface vapor over the subtropical north atlantic ocean |
publisher |
HAL CCSD |
publishDate |
2015 |
url |
https://hal.sorbonne-universite.fr/hal-01137465 https://hal.sorbonne-universite.fr/hal-01137465/document https://hal.sorbonne-universite.fr/hal-01137465/file/Benetti_2015_Importance_of.pdf https://doi.org/10.1002/2014JD021947 |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
ISSN: 2169-897X EISSN: 2169-8996 Journal of Geophysical Research: Atmospheres https://hal.sorbonne-universite.fr/hal-01137465 Journal of Geophysical Research: Atmospheres, 2015, 120 (6), pp.2190-2209. ⟨10.1002/2014JD021947⟩ http://onlinelibrary.wiley.com/doi/10.1002/2014JD021947/abstract |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1002/2014JD021947 hal-01137465 https://hal.sorbonne-universite.fr/hal-01137465 https://hal.sorbonne-universite.fr/hal-01137465/document https://hal.sorbonne-universite.fr/hal-01137465/file/Benetti_2015_Importance_of.pdf doi:10.1002/2014JD021947 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1002/2014JD021947 https://doi.org/10.1002/2014JD021947/abstract |
container_title |
Journal of Geophysical Research: Atmospheres |
container_volume |
120 |
container_issue |
6 |
container_start_page |
2190 |
op_container_end_page |
2209 |
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1766125947109507072 |
spelling |
ftunivnantes:oai:HAL:hal-01137465v1 2023-05-15T17:30:08+02:00 Importance of boundary layer mixing for the isotopic composition of surface vapor over the subtropical North Atlantic Ocean Benetti, Marion Aloisi, Giovanni Reverdin, Gilles Risi, Camille Sèze, Geneviève Laboratoire d'Océanographie et du Climat : Expérimentations et Approches Numériques (LOCEAN) Muséum national d'Histoire naturelle (MNHN)-Institut de Recherche pour le Développement (IRD)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Institut Pierre-Simon-Laplace (IPSL (FR_636)) École normale supérieure - Paris (ENS-PSL) Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris Diderot - Paris 7 (UPD7)-École polytechnique (X)-Centre National d'Études Spatiales Toulouse (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-École normale supérieure - Paris (ENS-PSL) Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris Diderot - Paris 7 (UPD7)-École polytechnique (X)-Centre National d'Études Spatiales Toulouse (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS) Biogéochimie-Traceurs-Paléoclimat (BTP) Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris Diderot - Paris 7 (UPD7)-École polytechnique (X)-Centre National d'Études Spatiales Toulouse (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Muséum national d'Histoire naturelle (MNHN)-Institut de Recherche pour le Développement (IRD)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Institut Pierre-Simon-Laplace (IPSL (FR_636)) Interactions et Processus au sein de la couche de Surface Océanique (IPSO) Laboratoire de Météorologie Dynamique (UMR 8539) (LMD) Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-École polytechnique (X)-École des Ponts ParisTech (ENPC)-Centre National de la Recherche Scientifique (CNRS)-Département des Géosciences - ENS Paris Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-École normale supérieure - Paris (ENS-PSL) Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL) TOSCA CNES 2015-03 https://hal.sorbonne-universite.fr/hal-01137465 https://hal.sorbonne-universite.fr/hal-01137465/document https://hal.sorbonne-universite.fr/hal-01137465/file/Benetti_2015_Importance_of.pdf https://doi.org/10.1002/2014JD021947 en eng HAL CCSD American Geophysical Union info:eu-repo/semantics/altIdentifier/doi/10.1002/2014JD021947 hal-01137465 https://hal.sorbonne-universite.fr/hal-01137465 https://hal.sorbonne-universite.fr/hal-01137465/document https://hal.sorbonne-universite.fr/hal-01137465/file/Benetti_2015_Importance_of.pdf doi:10.1002/2014JD021947 info:eu-repo/semantics/OpenAccess ISSN: 2169-897X EISSN: 2169-8996 Journal of Geophysical Research: Atmospheres https://hal.sorbonne-universite.fr/hal-01137465 Journal of Geophysical Research: Atmospheres, 2015, 120 (6), pp.2190-2209. ⟨10.1002/2014JD021947⟩ http://onlinelibrary.wiley.com/doi/10.1002/2014JD021947/abstract shallow convection evaporation water isotopes kinetic effects d-excess marine boundary layer [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [PHYS.PHYS.PHYS-GEO-PH]Physics [physics]/Physics [physics]/Geophysics [physics.geo-ph] info:eu-repo/semantics/article Journal articles 2015 ftunivnantes https://doi.org/10.1002/2014JD021947 https://doi.org/10.1002/2014JD021947/abstract 2023-01-18T01:19:21Z International audience During the summer 2012, we carried out continuous measurements of the isotopic composition (δ) of water vapor over the near-surface subtropical North Atlantic Ocean (STRASSE cruise). In this region of excess evaporation, we investigate the control of evaporation and mixing with a lower troposphere-derived, isotopically depleted air mass on the near-surface δ. We use a simple model to simulate the near-surface δ as the result of a two end-member mixing of the evaporative flux with free tropospheric air. The evaporative flux δ was estimated by the Craig and Gordon equation while the δ of the lower troposphere was taken from the LMDZ-iso global atmospheric circulation model. This simulation considers instantaneous mixing of lower tropospheric air with the evaporated flux and neglects lateral advection. Despite these simplifications, the simulations allow to identify the controls on the near-surface δ. The d-excess variability is largely a consequence of varying kinetic effects during evaporation, even during a convection event when the input of tropospheric vapor was strong. Kinetic effects and mixing processes affect simultaneously the near-surface δ and result in the vapor occupying distinct domains in the δ 18 O-δD space. The relative humidity-d-excess relationship shows that the closure assumption overestimates the d-excess variability at short time scales (less than a day). We interpret this as due to an effect of the residence time of the near-surface water vapor on the d-excess. Finally, we highlight the importance of reproducing mixing processes in models simulating isotopes over the subtropical North Atlantic Ocean and propose an extension of the closure assumption for use in initial conditions of distillation calculations. Article in Journal/Newspaper North Atlantic Université de Nantes: HAL-UNIV-NANTES Journal of Geophysical Research: Atmospheres 120 6 2190 2209 |