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...
Published in: | Climate of the Past |
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Format: | Article in Journal/Newspaper |
Language: | English |
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Copernicus GmbH
2017
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Online Access: | https://eprints.utas.edu.au/24393/ https://eprints.utas.edu.au/24393/1/Vallelonga%20et%20al%202017_sea-ice%20halogen%20at%20Law%20Dome_cp-13-171-2017.pdf https://doi.org/10.5194/cp-13-171-2017 |
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ftunivtasmania:oai:eprints.utas.edu.au:24393 2023-05-15T13:31:52+02:00 Sea-ice-related halogen enrichment at Law Dome, coastal East Antarctica Vallelonga, P Maffezzoli, N Moy, AD Curran, MAJ Vance, TR Edwards, R Hughes, G Barker, E Spreen, G Saiz-Lopez, A Corella, JP Cuevas, CA Spolaor, A 2017 application/pdf https://eprints.utas.edu.au/24393/ https://eprints.utas.edu.au/24393/1/Vallelonga%20et%20al%202017_sea-ice%20halogen%20at%20Law%20Dome_cp-13-171-2017.pdf https://doi.org/10.5194/cp-13-171-2017 en eng Copernicus GmbH https://eprints.utas.edu.au/24393/1/Vallelonga%20et%20al%202017_sea-ice%20halogen%20at%20Law%20Dome_cp-13-171-2017.pdf Vallelonga, P, Maffezzoli, N, Moy, AD, Curran, MAJ, Vance, TR orcid:0000-0001-6970-8646 , Edwards, R, Hughes, G, Barker, E, Spreen, G, Saiz-Lopez, A, Corella, JP, Cuevas, CA and Spolaor, A 2017 , 'Sea-ice-related halogen enrichment at Law Dome, coastal East Antarctica' , Climate of the Past, vol. 13 , pp. 171-184 , doi:10.5194/cp-13-171-2017 <http://dx.doi.org/10.5194/cp-13-171-2017>. sea-ice halogen Law Dome iodine bromine Article PeerReviewed 2017 ftunivtasmania https://doi.org/10.5194/cp-13-171-2017 2021-09-06T22:17:30Z 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 University of Tasmania: UTas ePrints Antarctic Austral East Antarctica Law Dome ENVELOPE(112.833,112.833,-66.733,-66.733) Law Dome Summit ENVELOPE(112.833,112.833,-66.733,-66.733) Pacific The Antarctic Wilkes Coast ENVELOPE(133.000,133.000,-66.500,-66.500) Climate of the Past 13 2 171 184 |
institution |
Open Polar |
collection |
University of Tasmania: UTas ePrints |
op_collection_id |
ftunivtasmania |
language |
English |
topic |
sea-ice halogen Law Dome iodine bromine |
spellingShingle |
sea-ice halogen Law Dome iodine bromine Vallelonga, P Maffezzoli, N Moy, AD Curran, MAJ Vance, TR Edwards, R Hughes, G Barker, E Spreen, G Saiz-Lopez, A Corella, JP Cuevas, CA Spolaor, A Sea-ice-related halogen enrichment at Law Dome, coastal East Antarctica |
topic_facet |
sea-ice halogen Law Dome iodine bromine |
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 |
Vallelonga, P Maffezzoli, N Moy, AD Curran, MAJ Vance, TR Edwards, R Hughes, G Barker, E Spreen, G Saiz-Lopez, A Corella, JP Cuevas, CA Spolaor, A |
author_facet |
Vallelonga, P Maffezzoli, N Moy, AD Curran, MAJ Vance, TR Edwards, R Hughes, G Barker, E Spreen, G Saiz-Lopez, A Corella, JP Cuevas, CA 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 |
publisher |
Copernicus GmbH |
publishDate |
2017 |
url |
https://eprints.utas.edu.au/24393/ https://eprints.utas.edu.au/24393/1/Vallelonga%20et%20al%202017_sea-ice%20halogen%20at%20Law%20Dome_cp-13-171-2017.pdf https://doi.org/10.5194/cp-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 Austral East Antarctica Law Dome Law Dome Summit Pacific The Antarctic Wilkes Coast |
geographic_facet |
Antarctic Austral East Antarctica Law Dome Law Dome Summit Pacific The Antarctic Wilkes Coast |
genre |
Antarc* Antarctic Antarctica East Antarctica Sea ice |
genre_facet |
Antarc* Antarctic Antarctica East Antarctica Sea ice |
op_relation |
https://eprints.utas.edu.au/24393/1/Vallelonga%20et%20al%202017_sea-ice%20halogen%20at%20Law%20Dome_cp-13-171-2017.pdf Vallelonga, P, Maffezzoli, N, Moy, AD, Curran, MAJ, Vance, TR orcid:0000-0001-6970-8646 , Edwards, R, Hughes, G, Barker, E, Spreen, G, Saiz-Lopez, A, Corella, JP, Cuevas, CA and Spolaor, A 2017 , 'Sea-ice-related halogen enrichment at Law Dome, coastal East Antarctica' , Climate of the Past, vol. 13 , pp. 171-184 , doi:10.5194/cp-13-171-2017 <http://dx.doi.org/10.5194/cp-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 |
_version_ |
1766021689059049472 |