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 36500km2. Three shallow firn cores (about 20m deep) were retrieved in different ice rises, Kupol...
Published in: | The Cryosphere |
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Online Access: | https://hdl.handle.net/10669/75884 https://www.the-cryosphere.net/12/1681/2018/ https://doi.org/10.5194/tc-12-1681-2018 |
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ftunivcostarica:oai:https://www.kerwa.ucr.ac.cr:10669/75884 2023-05-15T14:06:36+02:00 Variability of sea salts in ice and firn cores from Fimbul Ice Shelf, Dronning Maud Land, Antarctica Vega Riquelme, Carmen Paulina Isaksson, Elisabeth Schlosser, Elisabeth Divine, Dmitry Martma, Tõnu Mulvaney, Robert Eichler, Anja Schwikowski-Gigar, Margit 2018 application/pdf https://hdl.handle.net/10669/75884 https://www.the-cryosphere.net/12/1681/2018/ https://doi.org/10.5194/tc-12-1681-2018 en_US eng https://www.the-cryosphere.net/12/1681/2018/ 1994-0416 https://hdl.handle.net/10669/75884 doi:10.5194/tc-12-1681-2018 805-B6-774 The Cryosphere, Vol. 12(5), pp.1681-1697 SEA ice ICE Arctic research Ice Shelf Dronning Maud Land Fimbul Ice Shelf artículo científico 2018 ftunivcostarica https://doi.org/10.5194/tc-12-1681-2018 2022-10-30T05:40:52Z 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 36500km2. Three shallow firn cores (about 20m deep) were retrieved in different ice rises, Kupol Ciolkovskogo (KC), Kupol Moskovskij (KM), and Blåskimen 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 (3–42km) 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-sea-salt sulfate (nssSO42−) 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 behind ... Other/Unknown Material Antarc* Antarctica Arctic Blåskimen Island DML Dronning Maud Land Fimbul Ice Shelf Ice Shelf Sea ice The Cryosphere Universidad de Costa Rica: Repositorio Kérwá Arctic Blåskimen 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 |
Universidad de Costa Rica: Repositorio Kérwá |
op_collection_id |
ftunivcostarica |
language |
English |
topic |
SEA ice ICE Arctic research Ice Shelf Dronning Maud Land Fimbul Ice Shelf |
spellingShingle |
SEA ice ICE Arctic research Ice Shelf Dronning Maud Land Fimbul Ice Shelf Vega Riquelme, Carmen Paulina Isaksson, Elisabeth Schlosser, Elisabeth Divine, Dmitry Martma, Tõnu 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 |
SEA ice ICE Arctic research Ice Shelf Dronning Maud Land Fimbul Ice Shelf |
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 36500km2. Three shallow firn cores (about 20m deep) were retrieved in different ice rises, Kupol Ciolkovskogo (KC), Kupol Moskovskij (KM), and Blåskimen 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 (3–42km) 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-sea-salt sulfate (nssSO42−) 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 behind ... |
format |
Other/Unknown Material |
author |
Vega Riquelme, Carmen Paulina Isaksson, Elisabeth Schlosser, Elisabeth Divine, Dmitry Martma, Tõnu Mulvaney, Robert Eichler, Anja Schwikowski-Gigar, Margit |
author_facet |
Vega Riquelme, Carmen Paulina Isaksson, Elisabeth Schlosser, Elisabeth Divine, Dmitry Martma, Tõnu Mulvaney, Robert Eichler, Anja Schwikowski-Gigar, Margit |
author_sort |
Vega Riquelme, Carmen Paulina |
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 |
publishDate |
2018 |
url |
https://hdl.handle.net/10669/75884 https://www.the-cryosphere.net/12/1681/2018/ 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 |
Arctic Blåskimen Dronning Maud Land Fimbul Ice Shelf Kupol Moskovskij Trolltunga |
geographic_facet |
Arctic Blåskimen Dronning Maud Land Fimbul Ice Shelf Kupol Moskovskij Trolltunga |
genre |
Antarc* Antarctica Arctic Blåskimen Island DML Dronning Maud Land Fimbul Ice Shelf Ice Shelf Sea ice The Cryosphere |
genre_facet |
Antarc* Antarctica Arctic Blåskimen Island DML Dronning Maud Land Fimbul Ice Shelf Ice Shelf Sea ice The Cryosphere |
op_source |
The Cryosphere, Vol. 12(5), pp.1681-1697 |
op_relation |
https://www.the-cryosphere.net/12/1681/2018/ 1994-0416 https://hdl.handle.net/10669/75884 doi:10.5194/tc-12-1681-2018 805-B6-774 |
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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1766278596568023040 |