Spatio-temporal variability in modelled bottom-ice and sea-surface dimethylsulfide concentrations and fluxes in the Arctic during 1979-2015
Field observations suggest that oceanic emissions of dimethylsulfide (DMS) may play a dominant role in the production of Arctic aerosols and clouds, and therefore modulate the surface irradiance, during spring and summer. DMS is produced not only in the water column, but also in various sea‐ice habi...
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ftunivtasecite:oai:ecite.utas.edu.au:141281 2023-05-15T14:26:48+02:00 Spatio-temporal variability in modelled bottom-ice and sea-surface dimethylsulfide concentrations and fluxes in the Arctic during 1979-2015 Hayashida, H Carnat, G Gali, M Monahan, AH Mortenson, E Sou, T Steiner, NS 2020 https://doi.org/10.1029/2019GB006456 http://ecite.utas.edu.au/141281 en eng Amer Geophysical Union http://dx.doi.org/10.1029/2019GB006456 Hayashida, H and Carnat, G and Gali, M and Monahan, AH and Mortenson, E and Sou, T and Steiner, NS, Spatio-temporal variability in modelled bottom-ice and sea-surface dimethylsulfide concentrations and fluxes in the Arctic during 1979-2015, Global Biogeochemical Cycles, 34, (10) Article e2019GB006456. ISSN 0886-6236 (2020) [Refereed Article] http://ecite.utas.edu.au/141281 Earth Sciences Oceanography Biological oceanography Refereed Article PeerReviewed 2020 ftunivtasecite https://doi.org/10.1029/2019GB006456 2021-02-22T23:16:34Z Field observations suggest that oceanic emissions of dimethylsulfide (DMS) may play a dominant role in the production of Arctic aerosols and clouds, and therefore modulate the surface irradiance, during spring and summer. DMS is produced not only in the water column, but also in various sea‐ice habitats. The ongoing recession of Arctic sea ice is expected to enhance DMS emissions, but the magnitude of this increase is highly uncertain. Here we investigate the spatio‐temporal variability in bottom‐ice and sea‐surface DMS concentrations and fluxes using a regional sea ice‐ocean physical‐biogeochemical model. Model results indicate that the observed accelerated decline of Arctic sea‐ice extent since the beginning of the 21st century is associated with upward trends in May‐August pan‐Arctic‐average sea‐surface DMS concentration and sea‐to‐air DMS flux. On the other hand, strong interannual variability and statistically insignificant trends are found for bottom‐ice DMS concentration and ice‐to‐sea DMS flux, owing to the counteracting effects of the shrinking horizontal extent and the vertical thinning of sea ice on ice algal production. The pan‐Arctic DMS climatology products based on model simulation and satellite algorithms provide dynamically‐based spatial details that are absent in the in situ measurement‐based climatology due to limited spatio‐temporal data coverage and inevitable extrapolation bias. Lastly, model results indicate that the bottom‐ice DMS and its precursor dimethylsulfoniopropionate production can be the only local source of oceanic DMS emissions into the atmosphere during May prior to pelagic blooms, suggesting it may be a key component of the biological control on Arctic climate at that time. Article in Journal/Newspaper Arctic Arctic Sea ice eCite UTAS (University of Tasmania) Arctic Global Biogeochemical Cycles 34 10 |
institution |
Open Polar |
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eCite UTAS (University of Tasmania) |
op_collection_id |
ftunivtasecite |
language |
English |
topic |
Earth Sciences Oceanography Biological oceanography |
spellingShingle |
Earth Sciences Oceanography Biological oceanography Hayashida, H Carnat, G Gali, M Monahan, AH Mortenson, E Sou, T Steiner, NS Spatio-temporal variability in modelled bottom-ice and sea-surface dimethylsulfide concentrations and fluxes in the Arctic during 1979-2015 |
topic_facet |
Earth Sciences Oceanography Biological oceanography |
description |
Field observations suggest that oceanic emissions of dimethylsulfide (DMS) may play a dominant role in the production of Arctic aerosols and clouds, and therefore modulate the surface irradiance, during spring and summer. DMS is produced not only in the water column, but also in various sea‐ice habitats. The ongoing recession of Arctic sea ice is expected to enhance DMS emissions, but the magnitude of this increase is highly uncertain. Here we investigate the spatio‐temporal variability in bottom‐ice and sea‐surface DMS concentrations and fluxes using a regional sea ice‐ocean physical‐biogeochemical model. Model results indicate that the observed accelerated decline of Arctic sea‐ice extent since the beginning of the 21st century is associated with upward trends in May‐August pan‐Arctic‐average sea‐surface DMS concentration and sea‐to‐air DMS flux. On the other hand, strong interannual variability and statistically insignificant trends are found for bottom‐ice DMS concentration and ice‐to‐sea DMS flux, owing to the counteracting effects of the shrinking horizontal extent and the vertical thinning of sea ice on ice algal production. The pan‐Arctic DMS climatology products based on model simulation and satellite algorithms provide dynamically‐based spatial details that are absent in the in situ measurement‐based climatology due to limited spatio‐temporal data coverage and inevitable extrapolation bias. Lastly, model results indicate that the bottom‐ice DMS and its precursor dimethylsulfoniopropionate production can be the only local source of oceanic DMS emissions into the atmosphere during May prior to pelagic blooms, suggesting it may be a key component of the biological control on Arctic climate at that time. |
format |
Article in Journal/Newspaper |
author |
Hayashida, H Carnat, G Gali, M Monahan, AH Mortenson, E Sou, T Steiner, NS |
author_facet |
Hayashida, H Carnat, G Gali, M Monahan, AH Mortenson, E Sou, T Steiner, NS |
author_sort |
Hayashida, H |
title |
Spatio-temporal variability in modelled bottom-ice and sea-surface dimethylsulfide concentrations and fluxes in the Arctic during 1979-2015 |
title_short |
Spatio-temporal variability in modelled bottom-ice and sea-surface dimethylsulfide concentrations and fluxes in the Arctic during 1979-2015 |
title_full |
Spatio-temporal variability in modelled bottom-ice and sea-surface dimethylsulfide concentrations and fluxes in the Arctic during 1979-2015 |
title_fullStr |
Spatio-temporal variability in modelled bottom-ice and sea-surface dimethylsulfide concentrations and fluxes in the Arctic during 1979-2015 |
title_full_unstemmed |
Spatio-temporal variability in modelled bottom-ice and sea-surface dimethylsulfide concentrations and fluxes in the Arctic during 1979-2015 |
title_sort |
spatio-temporal variability in modelled bottom-ice and sea-surface dimethylsulfide concentrations and fluxes in the arctic during 1979-2015 |
publisher |
Amer Geophysical Union |
publishDate |
2020 |
url |
https://doi.org/10.1029/2019GB006456 http://ecite.utas.edu.au/141281 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Arctic Sea ice |
genre_facet |
Arctic Arctic Sea ice |
op_relation |
http://dx.doi.org/10.1029/2019GB006456 Hayashida, H and Carnat, G and Gali, M and Monahan, AH and Mortenson, E and Sou, T and Steiner, NS, Spatio-temporal variability in modelled bottom-ice and sea-surface dimethylsulfide concentrations and fluxes in the Arctic during 1979-2015, Global Biogeochemical Cycles, 34, (10) Article e2019GB006456. ISSN 0886-6236 (2020) [Refereed Article] http://ecite.utas.edu.au/141281 |
op_doi |
https://doi.org/10.1029/2019GB006456 |
container_title |
Global Biogeochemical Cycles |
container_volume |
34 |
container_issue |
10 |
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1766300241866260480 |