Sea-ice-related halogen enrichment at Law Dome, coastal East Antarctica
The Law Dome site is ideal for the evaluation of sea ice proxies due to its location near to the Antarctic coast, regular and high accumulation throughout the year, an absence of surface melting or remobilization, and minimal multiyear sea ice. We present records of bromine and iodine concentrations...
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Online Access: | http://hdl.handle.net/10278/3757207 https://doi.org/10.5194/cp-13-171-2017 https://cp.copernicus.org/articles/13/171/2017/ |
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ftuniveneziairis:oai:iris.unive.it:10278/3757207 2024-04-14T08:03:40+00:00 Sea-ice-related halogen enrichment at Law Dome, coastal East Antarctica Vallelonga P. Maffezzoli N. Moy A. D. Curran M. A. J. Vance T. R. Edwards R. Hughes G. Barker E. Spreen G. Saiz-Lopez A. Corella J. P. Cuevas C. A. Spolaor A. Vallelonga, P. Maffezzoli, N. Moy, A. D. Curran, M. A. J. Vance, T. R. Edwards, R. Hughes, G. Barker, E. Spreen, G. Saiz-Lopez, A. Corella, J. P. Cuevas, C. A. Spolaor, A. 2017 http://hdl.handle.net/10278/3757207 https://doi.org/10.5194/cp-13-171-2017 https://cp.copernicus.org/articles/13/171/2017/ eng eng info:eu-repo/semantics/altIdentifier/wos/WOS:000395110300001 volume:13 issue:2 firstpage:171 lastpage:184 numberofpages:14 journal:CLIMATE OF THE PAST http://hdl.handle.net/10278/3757207 doi:10.5194/cp-13-171-2017 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85014150550 https://cp.copernicus.org/articles/13/171/2017/ Settore GEO/04 - Geografia Fisica e Geomorfologia info:eu-repo/semantics/article 2017 ftuniveneziairis https://doi.org/10.5194/cp-13-171-2017 2024-03-21T18:21:48Z The Law Dome site is ideal for the evaluation of sea ice proxies due to its location near to the Antarctic coast, regular and high accumulation throughout the year, an absence of surface melting or remobilization, and minimal multiyear sea ice. We present records of bromine and iodine concentrations and their enrichment beyond seawater compositions and compare these to satellite observations of first-year sea ice area in the 90-130°ĝ€E sector of the Wilkes coast. Our findings support the results of previous studies of sea ice variability from Law Dome, indicating that Wilkes coast sea ice area is currently at its lowest level since the start of the 20th century. From the Law Dome DSS1213 firn core, 26 years of monthly deposition data indicate that the period of peak bromine enrichment is during austral spring-summer, from November to February. Results from a traverse along the lee (western) side of Law Dome show low levels of sodium and bromine deposition, with the greatest fluxes in the vicinity of the Law Dome summit. Finally, multidecadal variability in iodine enrichment appears well correlated to bromine enrichment, suggesting a common source of variability that may be related to the Interdecadal Pacific Oscillation (IPO). Article in Journal/Newspaper Antarc* Antarctic Antarctica East Antarctica Sea ice Università Ca’ Foscari Venezia: ARCA (Archivio Istituzionale della Ricerca) Antarctic The Antarctic East Antarctica Austral Pacific Law Dome ENVELOPE(112.833,112.833,-66.733,-66.733) Law Dome Summit ENVELOPE(112.833,112.833,-66.733,-66.733) Wilkes Coast ENVELOPE(133.000,133.000,-66.500,-66.500) Climate of the Past 13 2 171 184 |
institution |
Open Polar |
collection |
Università Ca’ Foscari Venezia: ARCA (Archivio Istituzionale della Ricerca) |
op_collection_id |
ftuniveneziairis |
language |
English |
topic |
Settore GEO/04 - Geografia Fisica e Geomorfologia |
spellingShingle |
Settore GEO/04 - Geografia Fisica e Geomorfologia Vallelonga P. Maffezzoli N. Moy A. D. Curran M. A. J. Vance T. R. Edwards R. Hughes G. Barker E. Spreen G. Saiz-Lopez A. Corella J. P. Cuevas C. A. Spolaor A. Sea-ice-related halogen enrichment at Law Dome, coastal East Antarctica |
topic_facet |
Settore GEO/04 - Geografia Fisica e Geomorfologia |
description |
The Law Dome site is ideal for the evaluation of sea ice proxies due to its location near to the Antarctic coast, regular and high accumulation throughout the year, an absence of surface melting or remobilization, and minimal multiyear sea ice. We present records of bromine and iodine concentrations and their enrichment beyond seawater compositions and compare these to satellite observations of first-year sea ice area in the 90-130°ĝ€E sector of the Wilkes coast. Our findings support the results of previous studies of sea ice variability from Law Dome, indicating that Wilkes coast sea ice area is currently at its lowest level since the start of the 20th century. From the Law Dome DSS1213 firn core, 26 years of monthly deposition data indicate that the period of peak bromine enrichment is during austral spring-summer, from November to February. Results from a traverse along the lee (western) side of Law Dome show low levels of sodium and bromine deposition, with the greatest fluxes in the vicinity of the Law Dome summit. Finally, multidecadal variability in iodine enrichment appears well correlated to bromine enrichment, suggesting a common source of variability that may be related to the Interdecadal Pacific Oscillation (IPO). |
author2 |
Vallelonga, P. Maffezzoli, N. Moy, A. D. Curran, M. A. J. Vance, T. R. Edwards, R. Hughes, G. Barker, E. Spreen, G. Saiz-Lopez, A. Corella, J. P. Cuevas, C. A. Spolaor, A. |
format |
Article in Journal/Newspaper |
author |
Vallelonga P. Maffezzoli N. Moy A. D. Curran M. A. J. Vance T. R. Edwards R. Hughes G. Barker E. Spreen G. Saiz-Lopez A. Corella J. P. Cuevas C. A. Spolaor A. |
author_facet |
Vallelonga P. Maffezzoli N. Moy A. D. Curran M. A. J. Vance T. R. Edwards R. Hughes G. Barker E. Spreen G. Saiz-Lopez A. Corella J. P. Cuevas C. A. Spolaor A. |
author_sort |
Vallelonga P. |
title |
Sea-ice-related halogen enrichment at Law Dome, coastal East Antarctica |
title_short |
Sea-ice-related halogen enrichment at Law Dome, coastal East Antarctica |
title_full |
Sea-ice-related halogen enrichment at Law Dome, coastal East Antarctica |
title_fullStr |
Sea-ice-related halogen enrichment at Law Dome, coastal East Antarctica |
title_full_unstemmed |
Sea-ice-related halogen enrichment at Law Dome, coastal East Antarctica |
title_sort |
sea-ice-related halogen enrichment at law dome, coastal east antarctica |
publishDate |
2017 |
url |
http://hdl.handle.net/10278/3757207 https://doi.org/10.5194/cp-13-171-2017 https://cp.copernicus.org/articles/13/171/2017/ |
long_lat |
ENVELOPE(112.833,112.833,-66.733,-66.733) ENVELOPE(112.833,112.833,-66.733,-66.733) ENVELOPE(133.000,133.000,-66.500,-66.500) |
geographic |
Antarctic The Antarctic East Antarctica Austral Pacific Law Dome Law Dome Summit Wilkes Coast |
geographic_facet |
Antarctic The Antarctic East Antarctica Austral Pacific Law Dome Law Dome Summit Wilkes Coast |
genre |
Antarc* Antarctic Antarctica East Antarctica Sea ice |
genre_facet |
Antarc* Antarctic Antarctica East Antarctica Sea ice |
op_relation |
info:eu-repo/semantics/altIdentifier/wos/WOS:000395110300001 volume:13 issue:2 firstpage:171 lastpage:184 numberofpages:14 journal:CLIMATE OF THE PAST http://hdl.handle.net/10278/3757207 doi:10.5194/cp-13-171-2017 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85014150550 https://cp.copernicus.org/articles/13/171/2017/ |
op_doi |
https://doi.org/10.5194/cp-13-171-2017 |
container_title |
Climate of the Past |
container_volume |
13 |
container_issue |
2 |
container_start_page |
171 |
op_container_end_page |
184 |
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1796299952321724416 |