Evidence of calcium carbonates in coastal (Talos Dome and Ross Sea area) East Antarctica snow and firn: Environmental and climatic implications
Micrometre-sized aeolian dust particles stored in Antarctic firn and ice layers are a useful tool for reconstructing climate and environmental changes in the past. The mineral content, particle concentration and chemical composition of modern dust in firn cores from the peripherycal dome (Talos Dome...
Published in: | Earth and Planetary Science Letters |
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Online Access: | http://hdl.handle.net/11584/105558 https://doi.org/10.1016/j.epsl.2008.03.045 |
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ftunicagliariris:oai:iris.unica.it:11584/105558 2024-04-21T07:51:59+00:00 Evidence of calcium carbonates in coastal (Talos Dome and Ross Sea area) East Antarctica snow and firn: Environmental and climatic implications SALA M DELMONTE B FREZZOTTI M PROPOSITO M SCARCHILLI C MAGGI V ARTIOLI G DAPIAGGI M MARINO F RICCI, PIER CARLO DE GIUDICI, GIOVANNI BATTISTA Sala, M Delmonte, B Frezzotti, M Proposito, M Scarchilli, C Maggi, V Artioli, G Dapiaggi, M Marino, F Ricci, PIER CARLO DE GIUDICI, GIOVANNI BATTISTA 2008 http://hdl.handle.net/11584/105558 https://doi.org/10.1016/j.epsl.2008.03.045 unknown info:eu-repo/semantics/altIdentifier/wos/WOS:000257835600005 volume:271 issue:1-4 firstpage:43 lastpage:52 numberofpages:10 journal:EARTH AND PLANETARY SCIENCE LETTERS http://hdl.handle.net/11584/105558 doi:10.1016/j.epsl.2008.03.045 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-45449104212 info:eu-repo/semantics/article 2008 ftunicagliariris https://doi.org/10.1016/j.epsl.2008.03.045 2024-03-25T16:05:24Z Micrometre-sized aeolian dust particles stored in Antarctic firn and ice layers are a useful tool for reconstructing climate and environmental changes in the past. The mineral content, particle concentration and chemical composition of modern dust in firn cores from the peripherycal dome (Talos Dome) and coastal area of East Antarctica (Ross Sea sector) were investigated. During analyses there was a considerable decrease in microparticle concentrations within a few hours of ice sample melting, accompanied by a systematic increase in the concentration of calcium ions (Ca 2+) in solution. Based on mineralogical phase analyses, which reveal the presence of anhydrous and hydrous calcium carbonates such as calcite (CaCO 3), monohydrocalcite (CaCO 3·H 2O) and ikaite (CaCO 3·6H 2O, hexahydrate calcium carbonate), the observed variations in concentrations are ascribed to the partial dissolution of the carbonate content of samples. Soluble carbonate compounds are thus primary aerosols included into the samples along with insoluble aluminosilicate minerals. We hypothesize hydrous carbonates may derive from the sea ice surface, where ikaite typically forms at the early stages of sea ice formation. Back trajectory calculations show that favourable events for air mass advection from the sea ice surface to Talos Dome are rare but likely to occur. Article in Journal/Newspaper Antarc* Antarctic Antarctica East Antarctica Ross Sea Sea ice Università degli Studi di Cagliari: UNICA IRIS Earth and Planetary Science Letters 271 1-4 43 52 |
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Università degli Studi di Cagliari: UNICA IRIS |
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ftunicagliariris |
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unknown |
description |
Micrometre-sized aeolian dust particles stored in Antarctic firn and ice layers are a useful tool for reconstructing climate and environmental changes in the past. The mineral content, particle concentration and chemical composition of modern dust in firn cores from the peripherycal dome (Talos Dome) and coastal area of East Antarctica (Ross Sea sector) were investigated. During analyses there was a considerable decrease in microparticle concentrations within a few hours of ice sample melting, accompanied by a systematic increase in the concentration of calcium ions (Ca 2+) in solution. Based on mineralogical phase analyses, which reveal the presence of anhydrous and hydrous calcium carbonates such as calcite (CaCO 3), monohydrocalcite (CaCO 3·H 2O) and ikaite (CaCO 3·6H 2O, hexahydrate calcium carbonate), the observed variations in concentrations are ascribed to the partial dissolution of the carbonate content of samples. Soluble carbonate compounds are thus primary aerosols included into the samples along with insoluble aluminosilicate minerals. We hypothesize hydrous carbonates may derive from the sea ice surface, where ikaite typically forms at the early stages of sea ice formation. Back trajectory calculations show that favourable events for air mass advection from the sea ice surface to Talos Dome are rare but likely to occur. |
author2 |
Sala, M Delmonte, B Frezzotti, M Proposito, M Scarchilli, C Maggi, V Artioli, G Dapiaggi, M Marino, F Ricci, PIER CARLO DE GIUDICI, GIOVANNI BATTISTA |
format |
Article in Journal/Newspaper |
author |
SALA M DELMONTE B FREZZOTTI M PROPOSITO M SCARCHILLI C MAGGI V ARTIOLI G DAPIAGGI M MARINO F RICCI, PIER CARLO DE GIUDICI, GIOVANNI BATTISTA |
spellingShingle |
SALA M DELMONTE B FREZZOTTI M PROPOSITO M SCARCHILLI C MAGGI V ARTIOLI G DAPIAGGI M MARINO F RICCI, PIER CARLO DE GIUDICI, GIOVANNI BATTISTA Evidence of calcium carbonates in coastal (Talos Dome and Ross Sea area) East Antarctica snow and firn: Environmental and climatic implications |
author_facet |
SALA M DELMONTE B FREZZOTTI M PROPOSITO M SCARCHILLI C MAGGI V ARTIOLI G DAPIAGGI M MARINO F RICCI, PIER CARLO DE GIUDICI, GIOVANNI BATTISTA |
author_sort |
SALA M |
title |
Evidence of calcium carbonates in coastal (Talos Dome and Ross Sea area) East Antarctica snow and firn: Environmental and climatic implications |
title_short |
Evidence of calcium carbonates in coastal (Talos Dome and Ross Sea area) East Antarctica snow and firn: Environmental and climatic implications |
title_full |
Evidence of calcium carbonates in coastal (Talos Dome and Ross Sea area) East Antarctica snow and firn: Environmental and climatic implications |
title_fullStr |
Evidence of calcium carbonates in coastal (Talos Dome and Ross Sea area) East Antarctica snow and firn: Environmental and climatic implications |
title_full_unstemmed |
Evidence of calcium carbonates in coastal (Talos Dome and Ross Sea area) East Antarctica snow and firn: Environmental and climatic implications |
title_sort |
evidence of calcium carbonates in coastal (talos dome and ross sea area) east antarctica snow and firn: environmental and climatic implications |
publishDate |
2008 |
url |
http://hdl.handle.net/11584/105558 https://doi.org/10.1016/j.epsl.2008.03.045 |
genre |
Antarc* Antarctic Antarctica East Antarctica Ross Sea Sea ice |
genre_facet |
Antarc* Antarctic Antarctica East Antarctica Ross Sea Sea ice |
op_relation |
info:eu-repo/semantics/altIdentifier/wos/WOS:000257835600005 volume:271 issue:1-4 firstpage:43 lastpage:52 numberofpages:10 journal:EARTH AND PLANETARY SCIENCE LETTERS http://hdl.handle.net/11584/105558 doi:10.1016/j.epsl.2008.03.045 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-45449104212 |
op_doi |
https://doi.org/10.1016/j.epsl.2008.03.045 |
container_title |
Earth and Planetary Science Letters |
container_volume |
271 |
container_issue |
1-4 |
container_start_page |
43 |
op_container_end_page |
52 |
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1796935257341034496 |