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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ftdoajarticles:oai:doaj.org/article:8b0117f2591a43b587361a373b418b81 2023-05-15T13:58:49+02:00 Sea-ice-related halogen enrichment at Law Dome, coastal East Antarctica P. Vallelonga N. Maffezzoli A. D. Moy M. A. J. Curran T. R. Vance R. Edwards G. Hughes E. Barker G. Spreen A. Saiz-Lopez J. P. Corella C. A. Cuevas A. Spolaor 2017-02-01T00:00:00Z https://doi.org/10.5194/cp-13-171-2017 https://doaj.org/article/8b0117f2591a43b587361a373b418b81 EN eng Copernicus Publications http://www.clim-past.net/13/171/2017/cp-13-171-2017.pdf https://doaj.org/toc/1814-9324 https://doaj.org/toc/1814-9332 1814-9324 1814-9332 doi:10.5194/cp-13-171-2017 https://doaj.org/article/8b0117f2591a43b587361a373b418b81 Climate of the Past, Vol 13, Iss 2, Pp 171-184 (2017) Environmental pollution TD172-193.5 Environmental protection TD169-171.8 Environmental sciences GE1-350 article 2017 ftdoajarticles https://doi.org/10.5194/cp-13-171-2017 2022-12-31T10:50:01Z 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° 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 Directory of Open Access Journals: DOAJ Articles 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 |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Environmental pollution TD172-193.5 Environmental protection TD169-171.8 Environmental sciences GE1-350 |
spellingShingle |
Environmental pollution TD172-193.5 Environmental protection TD169-171.8 Environmental sciences GE1-350 P. Vallelonga N. Maffezzoli A. D. Moy M. A. J. Curran T. R. Vance R. Edwards G. Hughes E. Barker G. Spreen A. Saiz-Lopez J. P. Corella C. A. Cuevas A. Spolaor Sea-ice-related halogen enrichment at Law Dome, coastal East Antarctica |
topic_facet |
Environmental pollution TD172-193.5 Environmental protection TD169-171.8 Environmental sciences GE1-350 |
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° 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). |
format |
Article in Journal/Newspaper |
author |
P. Vallelonga N. Maffezzoli A. D. Moy M. A. J. Curran T. R. Vance R. Edwards G. Hughes E. Barker G. Spreen A. Saiz-Lopez J. P. Corella C. A. Cuevas A. Spolaor |
author_facet |
P. Vallelonga N. Maffezzoli A. D. Moy M. A. J. Curran T. R. Vance R. Edwards G. Hughes E. Barker G. Spreen A. Saiz-Lopez J. P. Corella C. A. Cuevas A. Spolaor |
author_sort |
P. Vallelonga |
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 |
publisher |
Copernicus Publications |
publishDate |
2017 |
url |
https://doi.org/10.5194/cp-13-171-2017 https://doaj.org/article/8b0117f2591a43b587361a373b418b81 |
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_source |
Climate of the Past, Vol 13, Iss 2, Pp 171-184 (2017) |
op_relation |
http://www.clim-past.net/13/171/2017/cp-13-171-2017.pdf https://doaj.org/toc/1814-9324 https://doaj.org/toc/1814-9332 1814-9324 1814-9332 doi:10.5194/cp-13-171-2017 https://doaj.org/article/8b0117f2591a43b587361a373b418b81 |
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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1766267177077309440 |