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 20 m deep) were retrieved in different ice rises,...
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ftdoajarticles:oai:doaj.org/article:be3c22e7d8b44798bed3851ac73c8a84 2023-05-15T14:01:41+02:00 Variability of sea salts in ice and firn cores from Fimbul Ice Shelf, Dronning Maud Land, Antarctica C. P. Vega E. Isaksson E. Schlosser D. Divine T. Martma R. Mulvaney A. Eichler M. Schwikowski-Gigar 2018-05-01T00:00:00Z https://doi.org/10.5194/tc-12-1681-2018 https://doaj.org/article/be3c22e7d8b44798bed3851ac73c8a84 EN eng Copernicus Publications https://www.the-cryosphere.net/12/1681/2018/tc-12-1681-2018.pdf https://doaj.org/toc/1994-0416 https://doaj.org/toc/1994-0424 doi:10.5194/tc-12-1681-2018 1994-0416 1994-0424 https://doaj.org/article/be3c22e7d8b44798bed3851ac73c8a84 The Cryosphere, Vol 12, Pp 1681-1697 (2018) Environmental sciences GE1-350 Geology QE1-996.5 article 2018 ftdoajarticles https://doi.org/10.5194/tc-12-1681-2018 2022-12-31T11:46:29Z 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 20 m deep) were retrieved in different ice rises, Kupol Ciolkovskogo (KC), Kupol Moskovskij (KM), and Blåskimen Island (BI), while a 100 m 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 (50–400 m a.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-sea-salt sulfate (nssSO 4 2− ) 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 ... Article in Journal/Newspaper Antarc* Antarctica Blåskimen Island DML Dronning Maud Land Fimbul Ice Shelf Ice Shelf Sea ice The Cryosphere Directory of Open Access Journals: DOAJ Articles Dronning Maud Land Fimbul Ice Shelf ENVELOPE(-0.500,-0.500,-70.750,-70.750) Blåskimen ENVELOPE(-3.000,-3.000,-70.500,-70.500) Kupol ENVELOPE(68.533,68.533,-72.633,-72.633) Trolltunga ENVELOPE(-0.500,-0.500,-69.500,-69.500) Moskovskij ENVELOPE(1.417,1.417,-70.133,-70.133) The Cryosphere 12 5 1681 1697 |
institution |
Open Polar |
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Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Environmental sciences GE1-350 Geology QE1-996.5 |
spellingShingle |
Environmental sciences GE1-350 Geology QE1-996.5 C. P. Vega E. Isaksson E. Schlosser D. Divine T. Martma R. Mulvaney A. Eichler M. Schwikowski-Gigar Variability of sea salts in ice and firn cores from Fimbul Ice Shelf, Dronning Maud Land, Antarctica |
topic_facet |
Environmental sciences GE1-350 Geology QE1-996.5 |
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 20 m deep) were retrieved in different ice rises, Kupol Ciolkovskogo (KC), Kupol Moskovskij (KM), and Blåskimen Island (BI), while a 100 m 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 (50–400 m a.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-sea-salt sulfate (nssSO 4 2− ) 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 ... |
format |
Article in Journal/Newspaper |
author |
C. P. Vega E. Isaksson E. Schlosser D. Divine T. Martma R. Mulvaney A. Eichler M. Schwikowski-Gigar |
author_facet |
C. P. Vega E. Isaksson E. Schlosser D. Divine T. Martma R. Mulvaney A. Eichler M. Schwikowski-Gigar |
author_sort |
C. P. Vega |
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 |
Copernicus Publications |
publishDate |
2018 |
url |
https://doi.org/10.5194/tc-12-1681-2018 https://doaj.org/article/be3c22e7d8b44798bed3851ac73c8a84 |
long_lat |
ENVELOPE(-0.500,-0.500,-70.750,-70.750) ENVELOPE(-3.000,-3.000,-70.500,-70.500) ENVELOPE(68.533,68.533,-72.633,-72.633) ENVELOPE(-0.500,-0.500,-69.500,-69.500) ENVELOPE(1.417,1.417,-70.133,-70.133) |
geographic |
Dronning Maud Land Fimbul Ice Shelf Blåskimen Kupol Trolltunga Moskovskij |
geographic_facet |
Dronning Maud Land Fimbul Ice Shelf Blåskimen Kupol Trolltunga Moskovskij |
genre |
Antarc* Antarctica Blåskimen Island DML Dronning Maud Land Fimbul Ice Shelf Ice Shelf Sea ice The Cryosphere |
genre_facet |
Antarc* Antarctica Blåskimen Island DML Dronning Maud Land Fimbul Ice Shelf Ice Shelf Sea ice The Cryosphere |
op_source |
The Cryosphere, Vol 12, Pp 1681-1697 (2018) |
op_relation |
https://www.the-cryosphere.net/12/1681/2018/tc-12-1681-2018.pdf https://doaj.org/toc/1994-0416 https://doaj.org/toc/1994-0424 doi:10.5194/tc-12-1681-2018 1994-0416 1994-0424 https://doaj.org/article/be3c22e7d8b44798bed3851ac73c8a84 |
op_doi |
https://doi.org/10.5194/tc-12-1681-2018 |
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The Cryosphere |
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12 |
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