Dimethyl sulfide dynamics in first-year sea ice melt ponds in the Canadian Arctic Archipelago
Melt pond formation is a seasonal pan-Arctic process. During the thawing season, melt ponds may cover up to 90 % of the Arctic first-year sea ice (FYI) and 15 to 25 % of the multi-year sea ice (MYI). These pools of water lying at the surface of the sea ice cover are habitats for microorganisms and r...
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Copernicus Publications
2018
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ftnonlinearchiv:oai:noa.gwlb.de:cop_mods_00005876 2023-05-15T14:28:45+02:00 Dimethyl sulfide dynamics in first-year sea ice melt ponds in the Canadian Arctic Archipelago Gourdal, Margaux Lizotte, Martine Massé, Guillaume Gosselin, Michel Poulin, Michel Scarratt, Michael Charette, Joannie Levasseur, Maurice 2018-05 electronic https://doi.org/10.5194/bg-15-3169-2018 https://noa.gwlb.de/receive/cop_mods_00005876 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00005833/bg-15-3169-2018.pdf https://bg.copernicus.org/articles/15/3169/2018/bg-15-3169-2018.pdf eng eng Copernicus Publications Biogeosciences -- http://www.bibliothek.uni-regensburg.de/ezeit/?2158181 -- http://www.copernicus.org/EGU/bg/bg.html -- 1726-4189 https://doi.org/10.5194/bg-15-3169-2018 https://noa.gwlb.de/receive/cop_mods_00005876 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00005833/bg-15-3169-2018.pdf https://bg.copernicus.org/articles/15/3169/2018/bg-15-3169-2018.pdf https://creativecommons.org/licenses/by/4.0/ uneingeschränkt info:eu-repo/semantics/openAccess CC-BY article Verlagsveröffentlichung article Text doc-type:article 2018 ftnonlinearchiv https://doi.org/10.5194/bg-15-3169-2018 2022-02-08T22:59:19Z Melt pond formation is a seasonal pan-Arctic process. During the thawing season, melt ponds may cover up to 90 % of the Arctic first-year sea ice (FYI) and 15 to 25 % of the multi-year sea ice (MYI). These pools of water lying at the surface of the sea ice cover are habitats for microorganisms and represent a potential source of the biogenic gas dimethyl sulfide (DMS) for the atmosphere. Here we report on the concentrations and dynamics of DMS in nine melt ponds sampled in July 2014 in the Canadian Arctic Archipelago. DMS concentrations were under the detection limit (< 0.01 nmol L−1) in freshwater melt ponds and increased linearly with salinity (rs = 0.84, p ≤ 0.05) from ∼ 3 up to ∼ 6 nmol L−1 (avg. 3.7 ± 1.6 nmol L−1) in brackish melt ponds. This relationship suggests that the intrusion of seawater in melt ponds is a key physical mechanism responsible for the presence of DMS. Experiments were conducted with water from three melt ponds incubated for 24 h with and without the addition of two stable isotope-labelled precursors of DMS (dimethylsulfoniopropionate), (D6-DMSP) and dimethylsulfoxide (13C-DMSO). Results show that de novo biological production of DMS can take place within brackish melt ponds through bacterial DMSP uptake and cleavage. Our data suggest that FYI melt ponds could represent a reservoir of DMS available for potential flux to the atmosphere. The importance of this ice-related source of DMS for the Arctic atmosphere is expected to increase as a response to the thinning of sea ice and the areal and temporal expansion of melt ponds on Arctic FYI. Article in Journal/Newspaper Arctic Archipelago Arctic Canadian Arctic Archipelago Sea ice Niedersächsisches Online-Archiv NOA Arctic Canadian Arctic Archipelago Biogeosciences 15 10 3169 3188 |
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Niedersächsisches Online-Archiv NOA |
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English |
topic |
article Verlagsveröffentlichung |
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article Verlagsveröffentlichung Gourdal, Margaux Lizotte, Martine Massé, Guillaume Gosselin, Michel Poulin, Michel Scarratt, Michael Charette, Joannie Levasseur, Maurice Dimethyl sulfide dynamics in first-year sea ice melt ponds in the Canadian Arctic Archipelago |
topic_facet |
article Verlagsveröffentlichung |
description |
Melt pond formation is a seasonal pan-Arctic process. During the thawing season, melt ponds may cover up to 90 % of the Arctic first-year sea ice (FYI) and 15 to 25 % of the multi-year sea ice (MYI). These pools of water lying at the surface of the sea ice cover are habitats for microorganisms and represent a potential source of the biogenic gas dimethyl sulfide (DMS) for the atmosphere. Here we report on the concentrations and dynamics of DMS in nine melt ponds sampled in July 2014 in the Canadian Arctic Archipelago. DMS concentrations were under the detection limit (< 0.01 nmol L−1) in freshwater melt ponds and increased linearly with salinity (rs = 0.84, p ≤ 0.05) from ∼ 3 up to ∼ 6 nmol L−1 (avg. 3.7 ± 1.6 nmol L−1) in brackish melt ponds. This relationship suggests that the intrusion of seawater in melt ponds is a key physical mechanism responsible for the presence of DMS. Experiments were conducted with water from three melt ponds incubated for 24 h with and without the addition of two stable isotope-labelled precursors of DMS (dimethylsulfoniopropionate), (D6-DMSP) and dimethylsulfoxide (13C-DMSO). Results show that de novo biological production of DMS can take place within brackish melt ponds through bacterial DMSP uptake and cleavage. Our data suggest that FYI melt ponds could represent a reservoir of DMS available for potential flux to the atmosphere. The importance of this ice-related source of DMS for the Arctic atmosphere is expected to increase as a response to the thinning of sea ice and the areal and temporal expansion of melt ponds on Arctic FYI. |
format |
Article in Journal/Newspaper |
author |
Gourdal, Margaux Lizotte, Martine Massé, Guillaume Gosselin, Michel Poulin, Michel Scarratt, Michael Charette, Joannie Levasseur, Maurice |
author_facet |
Gourdal, Margaux Lizotte, Martine Massé, Guillaume Gosselin, Michel Poulin, Michel Scarratt, Michael Charette, Joannie Levasseur, Maurice |
author_sort |
Gourdal, Margaux |
title |
Dimethyl sulfide dynamics in first-year sea ice melt ponds in the Canadian Arctic Archipelago |
title_short |
Dimethyl sulfide dynamics in first-year sea ice melt ponds in the Canadian Arctic Archipelago |
title_full |
Dimethyl sulfide dynamics in first-year sea ice melt ponds in the Canadian Arctic Archipelago |
title_fullStr |
Dimethyl sulfide dynamics in first-year sea ice melt ponds in the Canadian Arctic Archipelago |
title_full_unstemmed |
Dimethyl sulfide dynamics in first-year sea ice melt ponds in the Canadian Arctic Archipelago |
title_sort |
dimethyl sulfide dynamics in first-year sea ice melt ponds in the canadian arctic archipelago |
publisher |
Copernicus Publications |
publishDate |
2018 |
url |
https://doi.org/10.5194/bg-15-3169-2018 https://noa.gwlb.de/receive/cop_mods_00005876 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00005833/bg-15-3169-2018.pdf https://bg.copernicus.org/articles/15/3169/2018/bg-15-3169-2018.pdf |
geographic |
Arctic Canadian Arctic Archipelago |
geographic_facet |
Arctic Canadian Arctic Archipelago |
genre |
Arctic Archipelago Arctic Canadian Arctic Archipelago Sea ice |
genre_facet |
Arctic Archipelago Arctic Canadian Arctic Archipelago Sea ice |
op_relation |
Biogeosciences -- http://www.bibliothek.uni-regensburg.de/ezeit/?2158181 -- http://www.copernicus.org/EGU/bg/bg.html -- 1726-4189 https://doi.org/10.5194/bg-15-3169-2018 https://noa.gwlb.de/receive/cop_mods_00005876 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00005833/bg-15-3169-2018.pdf https://bg.copernicus.org/articles/15/3169/2018/bg-15-3169-2018.pdf |
op_rights |
https://creativecommons.org/licenses/by/4.0/ uneingeschränkt info:eu-repo/semantics/openAccess |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.5194/bg-15-3169-2018 |
container_title |
Biogeosciences |
container_volume |
15 |
container_issue |
10 |
container_start_page |
3169 |
op_container_end_page |
3188 |
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1766302922919903232 |