Decadal increase in Arctic dimethylsulfide emission
International audience Dimethylsulfide (DMS), a gas produced by marine microbial food webs, promotes aerosol formation in pristine atmospheres, altering cloud radiative forcing and precipitation. Recent studies suggest that DMS controls aerosol formation in the summertime Arctic atmosphere and call...
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ftccsdartic:oai:HAL:hal-03044166v1 2023-05-15T14:38:16+02:00 Decadal increase in Arctic dimethylsulfide emission Galí, Martí Devred, Emmanuel Babin, Marcel Levasseur, Maurice Takuvik International Research Laboratory Université Laval Québec (ULaval)-Centre National de la Recherche Scientifique (CNRS) 2019-09-24 https://hal.archives-ouvertes.fr/hal-03044166 https://hal.archives-ouvertes.fr/hal-03044166/document https://hal.archives-ouvertes.fr/hal-03044166/file/Gali%20et%20al.%202019.pdf https://doi.org/10.1073/pnas.1904378116 en eng HAL CCSD National Academy of Sciences info:eu-repo/semantics/altIdentifier/doi/10.1073/pnas.1904378116 hal-03044166 https://hal.archives-ouvertes.fr/hal-03044166 https://hal.archives-ouvertes.fr/hal-03044166/document https://hal.archives-ouvertes.fr/hal-03044166/file/Gali%20et%20al.%202019.pdf doi:10.1073/pnas.1904378116 info:eu-repo/semantics/OpenAccess ISSN: 0027-8424 EISSN: 1091-6490 Proceedings of the National Academy of Sciences of the United States of America https://hal.archives-ouvertes.fr/hal-03044166 Proceedings of the National Academy of Sciences of the United States of America , National Academy of Sciences, 2019, 116 (39), pp.19311-19317. ⟨10.1073/pnas.1904378116⟩ [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere info:eu-repo/semantics/article Journal articles 2019 ftccsdartic https://doi.org/10.1073/pnas.1904378116 2021-12-05T00:41:48Z International audience Dimethylsulfide (DMS), a gas produced by marine microbial food webs, promotes aerosol formation in pristine atmospheres, altering cloud radiative forcing and precipitation. Recent studies suggest that DMS controls aerosol formation in the summertime Arctic atmosphere and call for an assessment of pan-Arctic DMS emission (EDMS) in a context of dramatic ecosystem changes. Using a new remote sensing algorithm, we show that summertime EDMS from ice-free waters increased at a mean rate of 13.3±6.7 Gg S decade-1 (∼33% decade-1) north of 70°N between 1998 and 2016. This trend, mostly explained by the reduction in sea ice extent, is consistent with independent atmospheric measurements showing an increasing trend of methane sulfonic acid, a DMS oxidation product. Extrapolation to an ice-free Arctic summer could imply a 2.4-fold (±1.2) increase in EDMS compared to present emission. However, unexpected regime shifts in Arctic geo-and ecosystems could result in future EDMS departure from the predicted range. Superimposed on the positive trend, EDMS shows substantial interannual changes and non-monotonic multiyear trends, reflecting the interplay between physical forcing, ice retreat patterns and phytoplankton productivity. Our results provide key constraints to determine whether increasing marine sulfur emissions, and resulting aerosol-cloud interactions, will moderate or accelerate Arctic warming in the context of sea ice retreat and increasing lowlevel cloud cover. Article in Journal/Newspaper Arctic Phytoplankton Sea ice Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) Arctic Proceedings of the National Academy of Sciences 116 39 19311 19317 |
institution |
Open Polar |
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Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |
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ftccsdartic |
language |
English |
topic |
[SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere |
spellingShingle |
[SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere Galí, Martí Devred, Emmanuel Babin, Marcel Levasseur, Maurice Decadal increase in Arctic dimethylsulfide emission |
topic_facet |
[SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere |
description |
International audience Dimethylsulfide (DMS), a gas produced by marine microbial food webs, promotes aerosol formation in pristine atmospheres, altering cloud radiative forcing and precipitation. Recent studies suggest that DMS controls aerosol formation in the summertime Arctic atmosphere and call for an assessment of pan-Arctic DMS emission (EDMS) in a context of dramatic ecosystem changes. Using a new remote sensing algorithm, we show that summertime EDMS from ice-free waters increased at a mean rate of 13.3±6.7 Gg S decade-1 (∼33% decade-1) north of 70°N between 1998 and 2016. This trend, mostly explained by the reduction in sea ice extent, is consistent with independent atmospheric measurements showing an increasing trend of methane sulfonic acid, a DMS oxidation product. Extrapolation to an ice-free Arctic summer could imply a 2.4-fold (±1.2) increase in EDMS compared to present emission. However, unexpected regime shifts in Arctic geo-and ecosystems could result in future EDMS departure from the predicted range. Superimposed on the positive trend, EDMS shows substantial interannual changes and non-monotonic multiyear trends, reflecting the interplay between physical forcing, ice retreat patterns and phytoplankton productivity. Our results provide key constraints to determine whether increasing marine sulfur emissions, and resulting aerosol-cloud interactions, will moderate or accelerate Arctic warming in the context of sea ice retreat and increasing lowlevel cloud cover. |
author2 |
Takuvik International Research Laboratory Université Laval Québec (ULaval)-Centre National de la Recherche Scientifique (CNRS) |
format |
Article in Journal/Newspaper |
author |
Galí, Martí Devred, Emmanuel Babin, Marcel Levasseur, Maurice |
author_facet |
Galí, Martí Devred, Emmanuel Babin, Marcel Levasseur, Maurice |
author_sort |
Galí, Martí |
title |
Decadal increase in Arctic dimethylsulfide emission |
title_short |
Decadal increase in Arctic dimethylsulfide emission |
title_full |
Decadal increase in Arctic dimethylsulfide emission |
title_fullStr |
Decadal increase in Arctic dimethylsulfide emission |
title_full_unstemmed |
Decadal increase in Arctic dimethylsulfide emission |
title_sort |
decadal increase in arctic dimethylsulfide emission |
publisher |
HAL CCSD |
publishDate |
2019 |
url |
https://hal.archives-ouvertes.fr/hal-03044166 https://hal.archives-ouvertes.fr/hal-03044166/document https://hal.archives-ouvertes.fr/hal-03044166/file/Gali%20et%20al.%202019.pdf https://doi.org/10.1073/pnas.1904378116 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Phytoplankton Sea ice |
genre_facet |
Arctic Phytoplankton Sea ice |
op_source |
ISSN: 0027-8424 EISSN: 1091-6490 Proceedings of the National Academy of Sciences of the United States of America https://hal.archives-ouvertes.fr/hal-03044166 Proceedings of the National Academy of Sciences of the United States of America , National Academy of Sciences, 2019, 116 (39), pp.19311-19317. ⟨10.1073/pnas.1904378116⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1073/pnas.1904378116 hal-03044166 https://hal.archives-ouvertes.fr/hal-03044166 https://hal.archives-ouvertes.fr/hal-03044166/document https://hal.archives-ouvertes.fr/hal-03044166/file/Gali%20et%20al.%202019.pdf doi:10.1073/pnas.1904378116 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1073/pnas.1904378116 |
container_title |
Proceedings of the National Academy of Sciences |
container_volume |
116 |
container_issue |
39 |
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19311 |
op_container_end_page |
19317 |
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