Decadal increase in Arctic dimethylsulfide emission
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 pa...
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ftpubmed:oai:pubmedcentral.nih.gov:6765246 2023-05-15T14:36:26+02:00 Decadal increase in Arctic dimethylsulfide emission Galí, Martí Devred, Emmanuel Babin, Marcel Levasseur, Maurice 2019-09-24 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6765246/ http://www.ncbi.nlm.nih.gov/pubmed/31501321 https://doi.org/10.1073/pnas.1904378116 en eng National Academy of Sciences http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6765246/ http://www.ncbi.nlm.nih.gov/pubmed/31501321 http://dx.doi.org/10.1073/pnas.1904378116 https://www.pnas.org/site/aboutpnas/licenses.xhtmlPublished under the PNAS license (https://www.pnas.org/site/aboutpnas/licenses.xhtml) . Physical Sciences Text 2019 ftpubmed https://doi.org/10.1073/pnas.1904378116 2020-03-15T01:15:30Z 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 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 nonmonotonic 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 low-level cloud cover. Text Arctic Phytoplankton Sea ice PubMed Central (PMC) Arctic Proceedings of the National Academy of Sciences 116 39 19311 19317 |
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Physical Sciences Galí, Martí Devred, Emmanuel Babin, Marcel Levasseur, Maurice Decadal increase in Arctic dimethylsulfide emission |
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Physical Sciences |
description |
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 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 nonmonotonic 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 low-level cloud cover. |
format |
Text |
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 |
National Academy of Sciences |
publishDate |
2019 |
url |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6765246/ http://www.ncbi.nlm.nih.gov/pubmed/31501321 https://doi.org/10.1073/pnas.1904378116 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Phytoplankton Sea ice |
genre_facet |
Arctic Phytoplankton Sea ice |
op_relation |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6765246/ http://www.ncbi.nlm.nih.gov/pubmed/31501321 http://dx.doi.org/10.1073/pnas.1904378116 |
op_rights |
https://www.pnas.org/site/aboutpnas/licenses.xhtmlPublished under the PNAS license (https://www.pnas.org/site/aboutpnas/licenses.xhtml) . |
op_doi |
https://doi.org/10.1073/pnas.1904378116 |
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Proceedings of the National Academy of Sciences |
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116 |
container_issue |
39 |
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19311 |
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19317 |
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1766309056355500032 |