Variability of sea salts in ice and firn cores from Fimbul Ice Shelf, Dronning Maud Land, Antarctica
Major ions were analysed in firn and ice cores located at Fimbul Ice Shelf (FIS), Dronning Maud Land - DML, Antarctica. FIS is the largest ice shelf in the Haakon VII Sea, with an extent of approximately 36 500 km(2). Three shallow firn cores (about 20m deep) were retrieved in different ice rises, K...
Published in: | The Cryosphere |
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Uppsala universitet, Luft-, vatten- och landskapslära
2018
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Online Access: | http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-356447 https://doi.org/10.5194/tc-12-1681-2018 |
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ftuppsalauniv:oai:DiVA.org:uu-356447 2023-05-15T14:00:26+02:00 Variability of sea salts in ice and firn cores from Fimbul Ice Shelf, Dronning Maud Land, Antarctica Vega, Carmen Isaksson, Elisabeth Schlosser, Elisabeth Divine, Dmitry Martma, Tonu Mulvaney, Robert Eichler, Anja Schwikowski-Gigar, Margit 2018 application/pdf http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-356447 https://doi.org/10.5194/tc-12-1681-2018 eng eng Uppsala universitet, Luft-, vatten- och landskapslära Norwegian Polar Res Inst, N-9296 Tromso, Norway;Univ Costa Rica, Sch Phys, San Jose 115012060, Costa Rica;Univ Costa Rica, Ctr Geophys Res, San Jose 115012060, Costa Rica Norwegian Polar Res Inst, N-9296 Tromso, Norway Univ Innsbruck, Inst Atmospher & Cryospher Sci, Innsbruck, Austria;Austrian Polar Res Inst, Vienna, Austria Tallinn Univ Technol, Dept Geol, Tallinn, Estonia British Antarctic Survey, Madingley Rd, Cambridge CB3 0ET, Cambs, England PSI, CH-5232 Villigen, Switzerland COPERNICUS GESELLSCHAFT MBH The Cryosphere, 1994-0416, 2018, 12:5, s. 1681-1697 http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-356447 doi:10.5194/tc-12-1681-2018 ISI:000432476600002 info:eu-repo/semantics/openAccess Oceanography Hydrology and Water Resources Oceanografi hydrologi och vattenresurser Article in journal info:eu-repo/semantics/article text 2018 ftuppsalauniv https://doi.org/10.5194/tc-12-1681-2018 2023-02-23T21:52:11Z Major ions were analysed in firn and ice cores located at Fimbul Ice Shelf (FIS), Dronning Maud Land - DML, Antarctica. FIS is the largest ice shelf in the Haakon VII Sea, with an extent of approximately 36 500 km(2). Three shallow firn cores (about 20m deep) were retrieved in different ice rises, Kupol Ciolkovskogo (KC), Kupol Moskovskij (KM), and Blaskimen Island (BI), while a 100m long core (S100) was drilled near the FIS edge. These sites are distributed over the entire FIS area so that they provide a variety of elevation (50-400ma. s.l.) and distance (3-42 km) to the sea. Sea-salt species (mainly Na+ and Cl-) generally dominate the precipitation chemistry in the study region. We associate a significant sixfold increase in median sea-salt concentrations, observed in the S100 core after the 1950s, to an enhanced exposure of the S100 site to primary sea-salt aerosol due to a shorter distance from the S100 site to the ice front, and to enhanced sea-salt aerosol production from blowing salty snow over sea ice, most likely related to the calving of Trolltunga occurred during the 1960s. This increase in sea-salt concentrations is synchronous with a shift in non-seasalt sulfate (nssSO2 4) toward negative values, suggesting a possible contribution of fractionated aerosol to the sea-salt load in the S100 core most likely originating from salty snow found on sea ice. In contrast, there is no evidence of a significant contribution of fractionated sea salt to the ice-rises sites, where the signal would be most likely masked by the large inputs of biogenic sulfate estimated for these sites. In summary, these results suggest that the S100 core contains a sea-salt record dominated by the proximity of the site to the ocean, and processes of sea ice formation in the neighbouring waters. In contrast, the ice-rises firn cores register a larger-scale signal of atmospheric flow conditions and a less efficient transport of sea-salt aerosols to these sites. These findings are a contribution to the understanding of the mechanisms ... Article in Journal/Newspaper Antarc* Antarctica DML Dronning Maud Land Fimbul Ice Shelf Ice Shelf Sea ice The Cryosphere Uppsala University: Publications (DiVA) Blaskimen Island ENVELOPE(-3.000,-3.000,-70.500,-70.500) Dronning Maud Land Fimbul Ice Shelf ENVELOPE(-0.500,-0.500,-70.750,-70.750) Kupol ENVELOPE(68.533,68.533,-72.633,-72.633) Moskovskij ENVELOPE(1.417,1.417,-70.133,-70.133) Trolltunga ENVELOPE(-0.500,-0.500,-69.500,-69.500) The Cryosphere 12 5 1681 1697 |
institution |
Open Polar |
collection |
Uppsala University: Publications (DiVA) |
op_collection_id |
ftuppsalauniv |
language |
English |
topic |
Oceanography Hydrology and Water Resources Oceanografi hydrologi och vattenresurser |
spellingShingle |
Oceanography Hydrology and Water Resources Oceanografi hydrologi och vattenresurser Vega, Carmen Isaksson, Elisabeth Schlosser, Elisabeth Divine, Dmitry Martma, Tonu Mulvaney, Robert Eichler, Anja Schwikowski-Gigar, Margit Variability of sea salts in ice and firn cores from Fimbul Ice Shelf, Dronning Maud Land, Antarctica |
topic_facet |
Oceanography Hydrology and Water Resources Oceanografi hydrologi och vattenresurser |
description |
Major ions were analysed in firn and ice cores located at Fimbul Ice Shelf (FIS), Dronning Maud Land - DML, Antarctica. FIS is the largest ice shelf in the Haakon VII Sea, with an extent of approximately 36 500 km(2). Three shallow firn cores (about 20m deep) were retrieved in different ice rises, Kupol Ciolkovskogo (KC), Kupol Moskovskij (KM), and Blaskimen Island (BI), while a 100m long core (S100) was drilled near the FIS edge. These sites are distributed over the entire FIS area so that they provide a variety of elevation (50-400ma. s.l.) and distance (3-42 km) to the sea. Sea-salt species (mainly Na+ and Cl-) generally dominate the precipitation chemistry in the study region. We associate a significant sixfold increase in median sea-salt concentrations, observed in the S100 core after the 1950s, to an enhanced exposure of the S100 site to primary sea-salt aerosol due to a shorter distance from the S100 site to the ice front, and to enhanced sea-salt aerosol production from blowing salty snow over sea ice, most likely related to the calving of Trolltunga occurred during the 1960s. This increase in sea-salt concentrations is synchronous with a shift in non-seasalt sulfate (nssSO2 4) toward negative values, suggesting a possible contribution of fractionated aerosol to the sea-salt load in the S100 core most likely originating from salty snow found on sea ice. In contrast, there is no evidence of a significant contribution of fractionated sea salt to the ice-rises sites, where the signal would be most likely masked by the large inputs of biogenic sulfate estimated for these sites. In summary, these results suggest that the S100 core contains a sea-salt record dominated by the proximity of the site to the ocean, and processes of sea ice formation in the neighbouring waters. In contrast, the ice-rises firn cores register a larger-scale signal of atmospheric flow conditions and a less efficient transport of sea-salt aerosols to these sites. These findings are a contribution to the understanding of the mechanisms ... |
format |
Article in Journal/Newspaper |
author |
Vega, Carmen Isaksson, Elisabeth Schlosser, Elisabeth Divine, Dmitry Martma, Tonu Mulvaney, Robert Eichler, Anja Schwikowski-Gigar, Margit |
author_facet |
Vega, Carmen Isaksson, Elisabeth Schlosser, Elisabeth Divine, Dmitry Martma, Tonu Mulvaney, Robert Eichler, Anja Schwikowski-Gigar, Margit |
author_sort |
Vega, Carmen |
title |
Variability of sea salts in ice and firn cores from Fimbul Ice Shelf, Dronning Maud Land, Antarctica |
title_short |
Variability of sea salts in ice and firn cores from Fimbul Ice Shelf, Dronning Maud Land, Antarctica |
title_full |
Variability of sea salts in ice and firn cores from Fimbul Ice Shelf, Dronning Maud Land, Antarctica |
title_fullStr |
Variability of sea salts in ice and firn cores from Fimbul Ice Shelf, Dronning Maud Land, Antarctica |
title_full_unstemmed |
Variability of sea salts in ice and firn cores from Fimbul Ice Shelf, Dronning Maud Land, Antarctica |
title_sort |
variability of sea salts in ice and firn cores from fimbul ice shelf, dronning maud land, antarctica |
publisher |
Uppsala universitet, Luft-, vatten- och landskapslära |
publishDate |
2018 |
url |
http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-356447 https://doi.org/10.5194/tc-12-1681-2018 |
long_lat |
ENVELOPE(-3.000,-3.000,-70.500,-70.500) ENVELOPE(-0.500,-0.500,-70.750,-70.750) ENVELOPE(68.533,68.533,-72.633,-72.633) ENVELOPE(1.417,1.417,-70.133,-70.133) ENVELOPE(-0.500,-0.500,-69.500,-69.500) |
geographic |
Blaskimen Island Dronning Maud Land Fimbul Ice Shelf Kupol Moskovskij Trolltunga |
geographic_facet |
Blaskimen Island Dronning Maud Land Fimbul Ice Shelf Kupol Moskovskij Trolltunga |
genre |
Antarc* Antarctica DML Dronning Maud Land Fimbul Ice Shelf Ice Shelf Sea ice The Cryosphere |
genre_facet |
Antarc* Antarctica DML Dronning Maud Land Fimbul Ice Shelf Ice Shelf Sea ice The Cryosphere |
op_relation |
The Cryosphere, 1994-0416, 2018, 12:5, s. 1681-1697 http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-356447 doi:10.5194/tc-12-1681-2018 ISI:000432476600002 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.5194/tc-12-1681-2018 |
container_title |
The Cryosphere |
container_volume |
12 |
container_issue |
5 |
container_start_page |
1681 |
op_container_end_page |
1697 |
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1766269527238115328 |