Meteoric water contribution to sea ice formation and its control of the surfacewater carbonate cycle on the Wandel Sea shelf, northeastern Greenland
An influx of glacial meltwater has the ability to alter the properties of marine surface waters and their ability to exchange CO2through changes to water column stratification and the inorganic carbon system. Here, we report how inputs of meteoric water affect the physical and biogeochemical propert...
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ftunivbruxelles:oai:dipot.ulb.ac.be:2013/339108 2023-05-15T16:21:23+02:00 Meteoric water contribution to sea ice formation and its control of the surfacewater carbonate cycle on the Wandel Sea shelf, northeastern Greenland Geilfus, Nicolas Xavier Munson, Kathleen Lemes, Marcos Wang, Feiyue Tison, Jean-Louis Rysgaard, Søren 2021-11 1 full-text file(s): application/pdf http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/339108 https://dipot.ulb.ac.be/dspace/bitstream/2013/339108/1/doi_322752.pdf en eng uri/info:doi/10.1525/elementa.2021.00004 uri/info:scp/85121205706 https://dipot.ulb.ac.be/dspace/bitstream/2013/339108/1/doi_322752.pdf http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/339108 1 full-text file(s): info:eu-repo/semantics/openAccess Elementa (Washington, D.C.), 9 (1 Généralités CO2 Glacier Meteoric water Sea ice info:eu-repo/semantics/article info:ulb-repo/semantics/articlePeerReview info:ulb-repo/semantics/openurl/article 2021 ftunivbruxelles 2022-06-12T22:03:27Z An influx of glacial meltwater has the ability to alter the properties of marine surface waters and their ability to exchange CO2through changes to water column stratification and the inorganic carbon system. Here, we report how inputs of meteoric water affect the physical and biogeochemical properties of both the water column and the sea ice cover on the Wandel Sea shelf, northeastern Greenland, during spring 2015. The observed depleted δ18O-H2O in the water column, with surface water values as low as -16.3 %, suggests a strong input of meteoric water (i.e. water derived from atmospheric precipitation). Depleted δ18O-H2O observed within sea ice (from -21.5 to -8.0%) reflects its formation from surface water that was already depleted isotopically. In addition, a thick snow cover, as present during the study, promotes the formation of snow ice as well as insulates the ice cover. Within sea ice, the resulting relatively warm temperature and low salinity impedes ikaite formation. However, measurements of total dissolved inorganic carbon and total alkalinity indicate that, in both sea ice and the water column, the dissolution of calcium carbonate was the main process affecting the carbonate system. This finding suggests that inputs of glacial meltwater deliver glacier-derived carbonate minerals to the ocean which become incorporated within the ice structure, increasing calcium carbonate dissolution in the water column in the absence of ikaite precipitation within the sea ice. If widespread in glacial-fed waters, bedrock carbonate minerals could increase CO2sequestration in glacial catchments despite the weakening of the sea ice carbon pump. SCOPUS: ar.j info:eu-repo/semantics/published Article in Journal/Newspaper glacier Greenland Sea ice Wandel Sea DI-fusion : dépôt institutionnel de l'Université libre de Bruxelles (ULB) Greenland Wandel ENVELOPE(-64.000,-64.000,-65.083,-65.083) |
institution |
Open Polar |
collection |
DI-fusion : dépôt institutionnel de l'Université libre de Bruxelles (ULB) |
op_collection_id |
ftunivbruxelles |
language |
English |
topic |
Généralités CO2 Glacier Meteoric water Sea ice |
spellingShingle |
Généralités CO2 Glacier Meteoric water Sea ice Geilfus, Nicolas Xavier Munson, Kathleen Lemes, Marcos Wang, Feiyue Tison, Jean-Louis Rysgaard, Søren Meteoric water contribution to sea ice formation and its control of the surfacewater carbonate cycle on the Wandel Sea shelf, northeastern Greenland |
topic_facet |
Généralités CO2 Glacier Meteoric water Sea ice |
description |
An influx of glacial meltwater has the ability to alter the properties of marine surface waters and their ability to exchange CO2through changes to water column stratification and the inorganic carbon system. Here, we report how inputs of meteoric water affect the physical and biogeochemical properties of both the water column and the sea ice cover on the Wandel Sea shelf, northeastern Greenland, during spring 2015. The observed depleted δ18O-H2O in the water column, with surface water values as low as -16.3 %, suggests a strong input of meteoric water (i.e. water derived from atmospheric precipitation). Depleted δ18O-H2O observed within sea ice (from -21.5 to -8.0%) reflects its formation from surface water that was already depleted isotopically. In addition, a thick snow cover, as present during the study, promotes the formation of snow ice as well as insulates the ice cover. Within sea ice, the resulting relatively warm temperature and low salinity impedes ikaite formation. However, measurements of total dissolved inorganic carbon and total alkalinity indicate that, in both sea ice and the water column, the dissolution of calcium carbonate was the main process affecting the carbonate system. This finding suggests that inputs of glacial meltwater deliver glacier-derived carbonate minerals to the ocean which become incorporated within the ice structure, increasing calcium carbonate dissolution in the water column in the absence of ikaite precipitation within the sea ice. If widespread in glacial-fed waters, bedrock carbonate minerals could increase CO2sequestration in glacial catchments despite the weakening of the sea ice carbon pump. SCOPUS: ar.j info:eu-repo/semantics/published |
format |
Article in Journal/Newspaper |
author |
Geilfus, Nicolas Xavier Munson, Kathleen Lemes, Marcos Wang, Feiyue Tison, Jean-Louis Rysgaard, Søren |
author_facet |
Geilfus, Nicolas Xavier Munson, Kathleen Lemes, Marcos Wang, Feiyue Tison, Jean-Louis Rysgaard, Søren |
author_sort |
Geilfus, Nicolas Xavier |
title |
Meteoric water contribution to sea ice formation and its control of the surfacewater carbonate cycle on the Wandel Sea shelf, northeastern Greenland |
title_short |
Meteoric water contribution to sea ice formation and its control of the surfacewater carbonate cycle on the Wandel Sea shelf, northeastern Greenland |
title_full |
Meteoric water contribution to sea ice formation and its control of the surfacewater carbonate cycle on the Wandel Sea shelf, northeastern Greenland |
title_fullStr |
Meteoric water contribution to sea ice formation and its control of the surfacewater carbonate cycle on the Wandel Sea shelf, northeastern Greenland |
title_full_unstemmed |
Meteoric water contribution to sea ice formation and its control of the surfacewater carbonate cycle on the Wandel Sea shelf, northeastern Greenland |
title_sort |
meteoric water contribution to sea ice formation and its control of the surfacewater carbonate cycle on the wandel sea shelf, northeastern greenland |
publishDate |
2021 |
url |
http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/339108 https://dipot.ulb.ac.be/dspace/bitstream/2013/339108/1/doi_322752.pdf |
long_lat |
ENVELOPE(-64.000,-64.000,-65.083,-65.083) |
geographic |
Greenland Wandel |
geographic_facet |
Greenland Wandel |
genre |
glacier Greenland Sea ice Wandel Sea |
genre_facet |
glacier Greenland Sea ice Wandel Sea |
op_source |
Elementa (Washington, D.C.), 9 (1 |
op_relation |
uri/info:doi/10.1525/elementa.2021.00004 uri/info:scp/85121205706 https://dipot.ulb.ac.be/dspace/bitstream/2013/339108/1/doi_322752.pdf http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/339108 |
op_rights |
1 full-text file(s): info:eu-repo/semantics/openAccess |
_version_ |
1766009383917977600 |