Halogen species record Antarctic sea ice extent over glacial-interglacial periods
Sea ice is an integral part of the earth's climate system because it affects planetary albedo, sea-surface salinity, and the atmosphere-ocean exchange of reactive gases and aerosols. Bromine and iodine chemistry is active at polar sea ice margins with the occurrence of bromine explosions and th...
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Online Access: | http://hdl.handle.net/10278/3687860 https://doi.org/10.5194/acp-13-6623-2013 |
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ftuniveneziairis:oai:iris.unive.it:10278/3687860 2024-04-14T08:04:30+00:00 Halogen species record Antarctic sea ice extent over glacial-interglacial periods Spolaor, Andrea VALLELONGA, PAUL TRAVIS Plane, J. M. C. KEHRWALD, NATALIE MARIE GABRIELI, Jacopo VARIN, Cristiano TURETTA, Clara COZZI, Giulio Kumar, R. Boutron, C. BARBANTE, Carlo Spolaor, Andrea Vallelonga, PAUL TRAVIS Plane, J. M. C. Kehrwald, NATALIE MARIE Gabrieli, Jacopo Varin, Cristiano Turetta, Clara Cozzi, Giulio Kumar, R. Boutron, C. Barbante, Carlo 2013 STAMPA http://hdl.handle.net/10278/3687860 https://doi.org/10.5194/acp-13-6623-2013 eng eng info:eu-repo/semantics/altIdentifier/wos/WOS:000321767200034 volume:13 issue:13 firstpage:6623 lastpage:6635 numberofpages:13 journal:ATMOSPHERIC CHEMISTRY AND PHYSICS http://hdl.handle.net/10278/3687860 doi:10.5194/acp-13-6623-2013 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-84880555927 info:eu-repo/semantics/closedAccess Atmospheric Science Settore CHIM/01 - Chimica Analitica info:eu-repo/semantics/article 2013 ftuniveneziairis https://doi.org/10.5194/acp-13-6623-2013 2024-03-21T18:06:12Z Sea ice is an integral part of the earth's climate system because it affects planetary albedo, sea-surface salinity, and the atmosphere-ocean exchange of reactive gases and aerosols. Bromine and iodine chemistry is active at polar sea ice margins with the occurrence of bromine explosions and the biological production of organoiodine from sea ice algae. Satellite measurements demonstrate that concentrations of bromine oxide (BrO) and iodine oxide (IO) decrease over sea ice toward the Antarctic interior. Here we present speciation measurements of bromine and iodine in the TALDICE (TALos Dome Ice CorE) ice core (159 11' E, 72 49' S; 2315 m a.s.l.) spanning the last 215 ky. The Talos Dome ice core is located 250 km inland and is sensitive to marine air masses intruding onto the Antarctic Plateau. Talos Dome bromide (Br−) is positively correlated with temperature and negatively correlated with sodium (Na). Based on the Br−/Na seawater ratio, bromide is depleted in the ice during glacial periods and enriched during interglacial periods. Total iodine, consisting of iodide (I−) and iodate (IO3−), peaks during glacials with lower values during interglacial periods. Although IO3− is considered the most stable iodine species in the atmosphere it was only observed in the TALDICE record during glacial maxima. Sea ice dynamics are arguably the primary driver of halogen fluxes over glacial-interglacial timescales, by altering the distance between the sea ice edge and the Antarctic plateau and by altering the surface area of sea ice available to algal colonization. Based on our results we propose the use of both halogens for examining Antarctic variability of past sea ice extent. © Author (s) 2012. Article in Journal/Newspaper Antarc* Antarctic ice algae ice core Sea ice Università Ca’ Foscari Venezia: ARCA (Archivio Istituzionale della Ricerca) Antarctic The Antarctic Talos Dome ENVELOPE(158.000,158.000,-73.000,-73.000) Atmospheric Chemistry and Physics 13 13 6623 6635 |
institution |
Open Polar |
collection |
Università Ca’ Foscari Venezia: ARCA (Archivio Istituzionale della Ricerca) |
op_collection_id |
ftuniveneziairis |
language |
English |
topic |
Atmospheric Science Settore CHIM/01 - Chimica Analitica |
spellingShingle |
Atmospheric Science Settore CHIM/01 - Chimica Analitica Spolaor, Andrea VALLELONGA, PAUL TRAVIS Plane, J. M. C. KEHRWALD, NATALIE MARIE GABRIELI, Jacopo VARIN, Cristiano TURETTA, Clara COZZI, Giulio Kumar, R. Boutron, C. BARBANTE, Carlo Halogen species record Antarctic sea ice extent over glacial-interglacial periods |
topic_facet |
Atmospheric Science Settore CHIM/01 - Chimica Analitica |
description |
Sea ice is an integral part of the earth's climate system because it affects planetary albedo, sea-surface salinity, and the atmosphere-ocean exchange of reactive gases and aerosols. Bromine and iodine chemistry is active at polar sea ice margins with the occurrence of bromine explosions and the biological production of organoiodine from sea ice algae. Satellite measurements demonstrate that concentrations of bromine oxide (BrO) and iodine oxide (IO) decrease over sea ice toward the Antarctic interior. Here we present speciation measurements of bromine and iodine in the TALDICE (TALos Dome Ice CorE) ice core (159 11' E, 72 49' S; 2315 m a.s.l.) spanning the last 215 ky. The Talos Dome ice core is located 250 km inland and is sensitive to marine air masses intruding onto the Antarctic Plateau. Talos Dome bromide (Br−) is positively correlated with temperature and negatively correlated with sodium (Na). Based on the Br−/Na seawater ratio, bromide is depleted in the ice during glacial periods and enriched during interglacial periods. Total iodine, consisting of iodide (I−) and iodate (IO3−), peaks during glacials with lower values during interglacial periods. Although IO3− is considered the most stable iodine species in the atmosphere it was only observed in the TALDICE record during glacial maxima. Sea ice dynamics are arguably the primary driver of halogen fluxes over glacial-interglacial timescales, by altering the distance between the sea ice edge and the Antarctic plateau and by altering the surface area of sea ice available to algal colonization. Based on our results we propose the use of both halogens for examining Antarctic variability of past sea ice extent. © Author (s) 2012. |
author2 |
Spolaor, Andrea Vallelonga, PAUL TRAVIS Plane, J. M. C. Kehrwald, NATALIE MARIE Gabrieli, Jacopo Varin, Cristiano Turetta, Clara Cozzi, Giulio Kumar, R. Boutron, C. Barbante, Carlo |
format |
Article in Journal/Newspaper |
author |
Spolaor, Andrea VALLELONGA, PAUL TRAVIS Plane, J. M. C. KEHRWALD, NATALIE MARIE GABRIELI, Jacopo VARIN, Cristiano TURETTA, Clara COZZI, Giulio Kumar, R. Boutron, C. BARBANTE, Carlo |
author_facet |
Spolaor, Andrea VALLELONGA, PAUL TRAVIS Plane, J. M. C. KEHRWALD, NATALIE MARIE GABRIELI, Jacopo VARIN, Cristiano TURETTA, Clara COZZI, Giulio Kumar, R. Boutron, C. BARBANTE, Carlo |
author_sort |
Spolaor, Andrea |
title |
Halogen species record Antarctic sea ice extent over glacial-interglacial periods |
title_short |
Halogen species record Antarctic sea ice extent over glacial-interglacial periods |
title_full |
Halogen species record Antarctic sea ice extent over glacial-interglacial periods |
title_fullStr |
Halogen species record Antarctic sea ice extent over glacial-interglacial periods |
title_full_unstemmed |
Halogen species record Antarctic sea ice extent over glacial-interglacial periods |
title_sort |
halogen species record antarctic sea ice extent over glacial-interglacial periods |
publishDate |
2013 |
url |
http://hdl.handle.net/10278/3687860 https://doi.org/10.5194/acp-13-6623-2013 |
long_lat |
ENVELOPE(158.000,158.000,-73.000,-73.000) |
geographic |
Antarctic The Antarctic Talos Dome |
geographic_facet |
Antarctic The Antarctic Talos Dome |
genre |
Antarc* Antarctic ice algae ice core Sea ice |
genre_facet |
Antarc* Antarctic ice algae ice core Sea ice |
op_relation |
info:eu-repo/semantics/altIdentifier/wos/WOS:000321767200034 volume:13 issue:13 firstpage:6623 lastpage:6635 numberofpages:13 journal:ATMOSPHERIC CHEMISTRY AND PHYSICS http://hdl.handle.net/10278/3687860 doi:10.5194/acp-13-6623-2013 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-84880555927 |
op_rights |
info:eu-repo/semantics/closedAccess |
op_doi |
https://doi.org/10.5194/acp-13-6623-2013 |
container_title |
Atmospheric Chemistry and Physics |
container_volume |
13 |
container_issue |
13 |
container_start_page |
6623 |
op_container_end_page |
6635 |
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1796301056030801920 |