A glaciochemical study of the 120 m ice core from Mill Island, East Antarctica
A 120 m ice core was drilled on Mill Island, East Antarctica (65°30′ S, 100°40′ E) during the 2009/2010 Australian Antarctic field season. Contiguous discrete 5 cm samples were measured for hydrogen peroxide, water stable isotopes, and trace ion chemistry. The ice core was annually dated using a com...
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ftdoajarticles:oai:doaj.org/article:b49d3e7248414920a90bb8893db7a217 2023-05-15T13:49:11+02:00 A glaciochemical study of the 120 m ice core from Mill Island, East Antarctica M. Inoue M. A. J. Curran A. D. Moy T. D. van Ommen A. D. Fraser H. E. Phillips I. D. Goodwin 2017-05-01T00:00:00Z https://doi.org/10.5194/cp-13-437-2017 https://doaj.org/article/b49d3e7248414920a90bb8893db7a217 EN eng Copernicus Publications http://www.clim-past.net/13/437/2017/cp-13-437-2017.pdf https://doaj.org/toc/1814-9324 https://doaj.org/toc/1814-9332 1814-9324 1814-9332 doi:10.5194/cp-13-437-2017 https://doaj.org/article/b49d3e7248414920a90bb8893db7a217 Climate of the Past, Vol 13, Iss 5, Pp 437-453 (2017) Environmental pollution TD172-193.5 Environmental protection TD169-171.8 Environmental sciences GE1-350 article 2017 ftdoajarticles https://doi.org/10.5194/cp-13-437-2017 2022-12-31T01:17:04Z A 120 m ice core was drilled on Mill Island, East Antarctica (65°30′ S, 100°40′ E) during the 2009/2010 Australian Antarctic field season. Contiguous discrete 5 cm samples were measured for hydrogen peroxide, water stable isotopes, and trace ion chemistry. The ice core was annually dated using a combination of chemical species and water stable isotopes. The Mill Island ice core preserves a climate record covering 97 years from 1913 to 2009 CE, with a mean snow accumulation of 1.35 m (ice-equivalent) per year (mIE yr −1 ). This northernmost East Antarctic coastal ice core site displays trace ion concentrations that are generally higher than other Antarctic ice core sites (e.g. mean sodium levels were 254 µEq L −1 ). The trace ion record at Mill Island is characterised by a unique and complex chemistry record with three distinct regimes identified. The trace ion record in regime A displays clear seasonality from 2000 to 2009 CE; regime B displays elevated concentrations with no seasonality from 1934 to 2000 CE; and regime C displays relatively low concentrations with seasonality from 1913 to 1934 CE. Sea salts were compared with instrumental data, including atmospheric models and satellite-derived sea-ice concentration, to investigate influences on the Mill Island ice core record. The mean annual sea salt record does not correlate with wind speed. Instead, sea-ice concentration to the east of Mill Island likely influences the annual mean sea salt record. A mechanism involving formation of frost flowers on sea ice is proposed to explain the extremely high sea salt concentration. The Mill Island ice core records are unexpectedly complex, with strong modulation of the trace chemistry on long timescales. Article in Journal/Newspaper Antarc* Antarctic Antarctica East Antarctica ice core Mill Island Sea ice Directory of Open Access Journals: DOAJ Articles Antarctic East Antarctica Mill Island ENVELOPE(100.667,100.667,-65.500,-65.500) Climate of the Past 13 5 437 453 |
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 M. Inoue M. A. J. Curran A. D. Moy T. D. van Ommen A. D. Fraser H. E. Phillips I. D. Goodwin A glaciochemical study of the 120 m ice core from Mill Island, East Antarctica |
topic_facet |
Environmental pollution TD172-193.5 Environmental protection TD169-171.8 Environmental sciences GE1-350 |
description |
A 120 m ice core was drilled on Mill Island, East Antarctica (65°30′ S, 100°40′ E) during the 2009/2010 Australian Antarctic field season. Contiguous discrete 5 cm samples were measured for hydrogen peroxide, water stable isotopes, and trace ion chemistry. The ice core was annually dated using a combination of chemical species and water stable isotopes. The Mill Island ice core preserves a climate record covering 97 years from 1913 to 2009 CE, with a mean snow accumulation of 1.35 m (ice-equivalent) per year (mIE yr −1 ). This northernmost East Antarctic coastal ice core site displays trace ion concentrations that are generally higher than other Antarctic ice core sites (e.g. mean sodium levels were 254 µEq L −1 ). The trace ion record at Mill Island is characterised by a unique and complex chemistry record with three distinct regimes identified. The trace ion record in regime A displays clear seasonality from 2000 to 2009 CE; regime B displays elevated concentrations with no seasonality from 1934 to 2000 CE; and regime C displays relatively low concentrations with seasonality from 1913 to 1934 CE. Sea salts were compared with instrumental data, including atmospheric models and satellite-derived sea-ice concentration, to investigate influences on the Mill Island ice core record. The mean annual sea salt record does not correlate with wind speed. Instead, sea-ice concentration to the east of Mill Island likely influences the annual mean sea salt record. A mechanism involving formation of frost flowers on sea ice is proposed to explain the extremely high sea salt concentration. The Mill Island ice core records are unexpectedly complex, with strong modulation of the trace chemistry on long timescales. |
format |
Article in Journal/Newspaper |
author |
M. Inoue M. A. J. Curran A. D. Moy T. D. van Ommen A. D. Fraser H. E. Phillips I. D. Goodwin |
author_facet |
M. Inoue M. A. J. Curran A. D. Moy T. D. van Ommen A. D. Fraser H. E. Phillips I. D. Goodwin |
author_sort |
M. Inoue |
title |
A glaciochemical study of the 120 m ice core from Mill Island, East Antarctica |
title_short |
A glaciochemical study of the 120 m ice core from Mill Island, East Antarctica |
title_full |
A glaciochemical study of the 120 m ice core from Mill Island, East Antarctica |
title_fullStr |
A glaciochemical study of the 120 m ice core from Mill Island, East Antarctica |
title_full_unstemmed |
A glaciochemical study of the 120 m ice core from Mill Island, East Antarctica |
title_sort |
glaciochemical study of the 120 m ice core from mill island, east antarctica |
publisher |
Copernicus Publications |
publishDate |
2017 |
url |
https://doi.org/10.5194/cp-13-437-2017 https://doaj.org/article/b49d3e7248414920a90bb8893db7a217 |
long_lat |
ENVELOPE(100.667,100.667,-65.500,-65.500) |
geographic |
Antarctic East Antarctica Mill Island |
geographic_facet |
Antarctic East Antarctica Mill Island |
genre |
Antarc* Antarctic Antarctica East Antarctica ice core Mill Island Sea ice |
genre_facet |
Antarc* Antarctic Antarctica East Antarctica ice core Mill Island Sea ice |
op_source |
Climate of the Past, Vol 13, Iss 5, Pp 437-453 (2017) |
op_relation |
http://www.clim-past.net/13/437/2017/cp-13-437-2017.pdf https://doaj.org/toc/1814-9324 https://doaj.org/toc/1814-9332 1814-9324 1814-9332 doi:10.5194/cp-13-437-2017 https://doaj.org/article/b49d3e7248414920a90bb8893db7a217 |
op_doi |
https://doi.org/10.5194/cp-13-437-2017 |
container_title |
Climate of the Past |
container_volume |
13 |
container_issue |
5 |
container_start_page |
437 |
op_container_end_page |
453 |
_version_ |
1766250976620052480 |