Modelling marine emissions and atmospheric distributions of halocarbons and dimethyl sulfide: the influence of prescribed water concentration vs. prescribed emissions
International audience Marine-produced short-lived trace gases such as dibromomethane (CH 2 Br 2 ), bromoform (CHBr 3 ), methyliodide (CH 3 I) and dimethyl sulfide (DMS) significantly impact tropospheric and stratospheric chemistry. Describing their marine emissions in atmospheric chemistry models a...
Published in: | Atmospheric Chemistry and Physics |
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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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Online Access: | https://insu.hal.science/insu-03576018 https://insu.hal.science/insu-03576018/document https://insu.hal.science/insu-03576018/file/acp-15-11753-2015.pdf https://doi.org/10.5194/acp-15-11753-2015 |
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Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |
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English |
topic |
[SDU]Sciences of the Universe [physics] |
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[SDU]Sciences of the Universe [physics] Lennartz, S. T. Krysztofiak, G. Marandino, C. A. Sinnhuber, B. -M. Tegtmeier, S. Ziska, F. Hossaini, R. Krüger, K. Montzka, S. A. Atlas, E. Oram, D. E. Keber, T. Bönisch, H. Quack, B. Modelling marine emissions and atmospheric distributions of halocarbons and dimethyl sulfide: the influence of prescribed water concentration vs. prescribed emissions |
topic_facet |
[SDU]Sciences of the Universe [physics] |
description |
International audience Marine-produced short-lived trace gases such as dibromomethane (CH 2 Br 2 ), bromoform (CHBr 3 ), methyliodide (CH 3 I) and dimethyl sulfide (DMS) significantly impact tropospheric and stratospheric chemistry. Describing their marine emissions in atmospheric chemistry models as accurately as possible is necessary to quantify their impact on ozone depletion and Earth's radiative budget. So far, marine emissions of trace gases have mainly been prescribed from emission climatologies, thus lacking the interaction between the actual state of the atmosphere and the ocean. Here we present simulations with the chemistry climate model EMAC (ECHAM5/MESSy Atmospheric Chemistry) with online calculation of emissions based on surface water concentrations, in contrast to directly prescribed emissions. Considering the actual state of the model atmosphere results in a concentration gradient consistent with model real-time conditions at the ocean surface and in the atmosphere, which determine the direction and magnitude of the computed flux. This method has a number of conceptual and practical benefits, as the modelled emission can respond consistently to changes in sea surface temperature, surface wind speed, sea ice cover and especially atmospheric mixing ratio. This online calculation could enhance, dampen or even invert the fluxes (i.e. deposition instead of emissions) of very short-lived substances (VSLS). We show that differences between prescribing emissions and prescribing concentrations (-28 % for CH 2 Br 2 to +11 % for CHBr 3 ) result mainly from consideration of the actual, time-varying state of the atmosphere. The absolute magnitude of the differences depends mainly on the surface ocean saturation of each particular gas. Comparison to observations from aircraft, ships and ground stations reveals that computing the air-sea flux interactively leads in most of the cases to more accurate atmospheric mixing ratios in the model compared to the computation from prescribed emissions. Calculating ... |
author2 |
Laboratoire de Physique et Chimie de l'Environnement et de l'Espace (LPC2E) Observatoire des Sciences de l'Univers en région Centre (OSUC) Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université d'Orléans (UO)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université d'Orléans (UO)-Centre National de la Recherche Scientifique (CNRS)-Centre National d’Études Spatiales Paris (CNES) Karlsruhe Institute of Technology (KIT) |
format |
Article in Journal/Newspaper |
author |
Lennartz, S. T. Krysztofiak, G. Marandino, C. A. Sinnhuber, B. -M. Tegtmeier, S. Ziska, F. Hossaini, R. Krüger, K. Montzka, S. A. Atlas, E. Oram, D. E. Keber, T. Bönisch, H. Quack, B. |
author_facet |
Lennartz, S. T. Krysztofiak, G. Marandino, C. A. Sinnhuber, B. -M. Tegtmeier, S. Ziska, F. Hossaini, R. Krüger, K. Montzka, S. A. Atlas, E. Oram, D. E. Keber, T. Bönisch, H. Quack, B. |
author_sort |
Lennartz, S. T. |
title |
Modelling marine emissions and atmospheric distributions of halocarbons and dimethyl sulfide: the influence of prescribed water concentration vs. prescribed emissions |
title_short |
Modelling marine emissions and atmospheric distributions of halocarbons and dimethyl sulfide: the influence of prescribed water concentration vs. prescribed emissions |
title_full |
Modelling marine emissions and atmospheric distributions of halocarbons and dimethyl sulfide: the influence of prescribed water concentration vs. prescribed emissions |
title_fullStr |
Modelling marine emissions and atmospheric distributions of halocarbons and dimethyl sulfide: the influence of prescribed water concentration vs. prescribed emissions |
title_full_unstemmed |
Modelling marine emissions and atmospheric distributions of halocarbons and dimethyl sulfide: the influence of prescribed water concentration vs. prescribed emissions |
title_sort |
modelling marine emissions and atmospheric distributions of halocarbons and dimethyl sulfide: the influence of prescribed water concentration vs. prescribed emissions |
publisher |
HAL CCSD |
publishDate |
2015 |
url |
https://insu.hal.science/insu-03576018 https://insu.hal.science/insu-03576018/document https://insu.hal.science/insu-03576018/file/acp-15-11753-2015.pdf https://doi.org/10.5194/acp-15-11753-2015 |
genre |
Sea ice |
genre_facet |
Sea ice |
op_source |
ISSN: 1680-7316 EISSN: 1680-7324 Atmospheric Chemistry and Physics https://insu.hal.science/insu-03576018 Atmospheric Chemistry and Physics, 2015, 15, pp.11753-11772. ⟨10.5194/acp-15-11753-2015⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.5194/acp-15-11753-2015 insu-03576018 https://insu.hal.science/insu-03576018 https://insu.hal.science/insu-03576018/document https://insu.hal.science/insu-03576018/file/acp-15-11753-2015.pdf BIBCODE: 2015ACP.1511753L doi:10.5194/acp-15-11753-2015 |
op_rights |
http://creativecommons.org/licenses/by/ info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.5194/acp-15-11753-2015 |
container_title |
Atmospheric Chemistry and Physics |
container_volume |
15 |
container_issue |
20 |
container_start_page |
11753 |
op_container_end_page |
11772 |
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1788065419757617152 |
spelling |
ftccsdartic:oai:HAL:insu-03576018v1 2024-01-14T10:10:38+01:00 Modelling marine emissions and atmospheric distributions of halocarbons and dimethyl sulfide: the influence of prescribed water concentration vs. prescribed emissions Lennartz, S. T. Krysztofiak, G. Marandino, C. A. Sinnhuber, B. -M. Tegtmeier, S. Ziska, F. Hossaini, R. Krüger, K. Montzka, S. A. Atlas, E. Oram, D. E. Keber, T. Bönisch, H. Quack, B. Laboratoire de Physique et Chimie de l'Environnement et de l'Espace (LPC2E) Observatoire des Sciences de l'Univers en région Centre (OSUC) Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université d'Orléans (UO)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université d'Orléans (UO)-Centre National de la Recherche Scientifique (CNRS)-Centre National d’Études Spatiales Paris (CNES) Karlsruhe Institute of Technology (KIT) 2015 https://insu.hal.science/insu-03576018 https://insu.hal.science/insu-03576018/document https://insu.hal.science/insu-03576018/file/acp-15-11753-2015.pdf https://doi.org/10.5194/acp-15-11753-2015 en eng HAL CCSD European Geosciences Union info:eu-repo/semantics/altIdentifier/doi/10.5194/acp-15-11753-2015 insu-03576018 https://insu.hal.science/insu-03576018 https://insu.hal.science/insu-03576018/document https://insu.hal.science/insu-03576018/file/acp-15-11753-2015.pdf BIBCODE: 2015ACP.1511753L doi:10.5194/acp-15-11753-2015 http://creativecommons.org/licenses/by/ info:eu-repo/semantics/OpenAccess ISSN: 1680-7316 EISSN: 1680-7324 Atmospheric Chemistry and Physics https://insu.hal.science/insu-03576018 Atmospheric Chemistry and Physics, 2015, 15, pp.11753-11772. ⟨10.5194/acp-15-11753-2015⟩ [SDU]Sciences of the Universe [physics] info:eu-repo/semantics/article Journal articles 2015 ftccsdartic https://doi.org/10.5194/acp-15-11753-2015 2023-12-17T00:23:28Z International audience Marine-produced short-lived trace gases such as dibromomethane (CH 2 Br 2 ), bromoform (CHBr 3 ), methyliodide (CH 3 I) and dimethyl sulfide (DMS) significantly impact tropospheric and stratospheric chemistry. Describing their marine emissions in atmospheric chemistry models as accurately as possible is necessary to quantify their impact on ozone depletion and Earth's radiative budget. So far, marine emissions of trace gases have mainly been prescribed from emission climatologies, thus lacking the interaction between the actual state of the atmosphere and the ocean. Here we present simulations with the chemistry climate model EMAC (ECHAM5/MESSy Atmospheric Chemistry) with online calculation of emissions based on surface water concentrations, in contrast to directly prescribed emissions. Considering the actual state of the model atmosphere results in a concentration gradient consistent with model real-time conditions at the ocean surface and in the atmosphere, which determine the direction and magnitude of the computed flux. This method has a number of conceptual and practical benefits, as the modelled emission can respond consistently to changes in sea surface temperature, surface wind speed, sea ice cover and especially atmospheric mixing ratio. This online calculation could enhance, dampen or even invert the fluxes (i.e. deposition instead of emissions) of very short-lived substances (VSLS). We show that differences between prescribing emissions and prescribing concentrations (-28 % for CH 2 Br 2 to +11 % for CHBr 3 ) result mainly from consideration of the actual, time-varying state of the atmosphere. The absolute magnitude of the differences depends mainly on the surface ocean saturation of each particular gas. Comparison to observations from aircraft, ships and ground stations reveals that computing the air-sea flux interactively leads in most of the cases to more accurate atmospheric mixing ratios in the model compared to the computation from prescribed emissions. Calculating ... Article in Journal/Newspaper Sea ice Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) Atmospheric Chemistry and Physics 15 20 11753 11772 |