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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ftcopernicus:oai:publications.copernicus.org:cp53539 2023-05-15T13:54:27+02:00 Sea-ice-related halogen enrichment at Law Dome, coastal East Antarctica Vallelonga, Paul Maffezzoli, Niccolo Moy, Andrew D. Curran, Mark A. J. Vance, Tessa R. Edwards, Ross Hughes, Gwyn Barker, Emily Spreen, Gunnar Saiz-Lopez, Alfonso Corella, J. Pablo Cuevas, Carlos A. Spolaor, Andrea 2018-11-01 application/pdf https://doi.org/10.5194/cp-13-171-2017 https://cp.copernicus.org/articles/13/171/2017/ eng eng doi:10.5194/cp-13-171-2017 https://cp.copernicus.org/articles/13/171/2017/ eISSN: 1814-9332 Text 2018 ftcopernicus https://doi.org/10.5194/cp-13-171-2017 2020-07-20T16:23:48Z 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° 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). Text Antarc* Antarctic Antarctica East Antarctica Sea ice Copernicus Publications: E-Journals 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 |
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Open Polar |
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Copernicus Publications: E-Journals |
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ftcopernicus |
language |
English |
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 |
Text |
author |
Vallelonga, Paul Maffezzoli, Niccolo Moy, Andrew D. Curran, Mark A. J. Vance, Tessa R. Edwards, Ross Hughes, Gwyn Barker, Emily Spreen, Gunnar Saiz-Lopez, Alfonso Corella, J. Pablo Cuevas, Carlos A. Spolaor, Andrea |
spellingShingle |
Vallelonga, Paul Maffezzoli, Niccolo Moy, Andrew D. Curran, Mark A. J. Vance, Tessa R. Edwards, Ross Hughes, Gwyn Barker, Emily Spreen, Gunnar Saiz-Lopez, Alfonso Corella, J. Pablo Cuevas, Carlos A. Spolaor, Andrea Sea-ice-related halogen enrichment at Law Dome, coastal East Antarctica |
author_facet |
Vallelonga, Paul Maffezzoli, Niccolo Moy, Andrew D. Curran, Mark A. J. Vance, Tessa R. Edwards, Ross Hughes, Gwyn Barker, Emily Spreen, Gunnar Saiz-Lopez, Alfonso Corella, J. Pablo Cuevas, Carlos A. Spolaor, Andrea |
author_sort |
Vallelonga, Paul |
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 |
2018 |
url |
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 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_source |
eISSN: 1814-9332 |
op_relation |
doi:10.5194/cp-13-171-2017 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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1766260327862763520 |