alpha- and gamma-Hexachlorocyclohexane concentrations in brine, bulk sea-ice, water and air during a CCGS Amundsen cruise to the Canadian western Arctic
We used holes augered partially into first-year sea ice (sumps) to determine a- and g-HCH concentrations in sea-ice brine. The overwintering of the CCGS Amundsen in the Canadian western Arctic, as part of the Circumpolar Flaw Lead (CFL) System Study, provided the circumstances to allow brine to accu...
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.818639 2023-05-15T14:26:18+02:00 alpha- and gamma-Hexachlorocyclohexane concentrations in brine, bulk sea-ice, water and air during a CCGS Amundsen cruise to the Canadian western Arctic Pućko, Monika Stern, Gary A Macdonald, Robie W Barber, David G MEDIAN LATITUDE: 70.493600 * MEDIAN LONGITUDE: -124.557360 * SOUTH-BOUND LATITUDE: 69.946000 * WEST-BOUND LONGITUDE: -126.172000 * NORTH-BOUND LATITUDE: 71.230000 * EAST-BOUND LONGITUDE: -121.872000 * DATE/TIME START: 2008-01-06T00:00:00 * DATE/TIME END: 2008-05-14T00:00:00 2010-08-29 application/zip, 2 datasets https://doi.pangaea.de/10.1594/PANGAEA.818639 https://doi.org/10.1594/PANGAEA.818639 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.818639 https://doi.org/10.1594/PANGAEA.818639 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess CC-BY Supplement to: Pućko, Monika; Stern, Gary A; Macdonald, Robie W; Barber, David G (2010): alpha- and gamma-Hexachlorocyclohexane measurements in the brine fraction of sea ice in the Canadian High Arctic using a sump-hole technique. Environmental Science & Technology, 44(24), 9258-9264, https://doi.org/10.1021/es102275b International Polar Year (2007-2008) IPY Dataset 2010 ftpangaea https://doi.org/10.1594/PANGAEA.818639 https://doi.org/10.1021/es102275b 2023-01-20T07:33:07Z We used holes augered partially into first-year sea ice (sumps) to determine a- and g-HCH concentrations in sea-ice brine. The overwintering of the CCGS Amundsen in the Canadian western Arctic, as part of the Circumpolar Flaw Lead (CFL) System Study, provided the circumstances to allow brine to accumulate in sumps sufficiently to test the methodology. We show, for the first time, that as much as 50% of total HCHs in seawater can become entrapped within the ice crystal matrix. On average, in the winter first-year sea ice HCH brine concentrations reached 4.013 ± 0.307 ng/L and 0.423 ± 0.013 ng/L for the a- and g-isomer, respectively. In the spring, HCHs decreased gradually with time, with increasing brine volume fraction and decreasing brine salinity. These decreasing concentrations could be accounted for by both the dilution with the ice crystal matrix and under-ice seawater. We propose that the former process plays a more significant role considering brine volume fractions calculated in this study were below 20%. Levels of HCHs in the brine exceed under-ice water concentrations by approximately a factor of 3, a circumstance suggesting that the brine ecosystem has been, and continues to be, the most exposed to HCHs. Dataset Arctic Arctic International Polar Year IPY Sea ice PANGAEA - Data Publisher for Earth & Environmental Science Arctic ENVELOPE(-126.172000,-121.872000,71.230000,69.946000) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
International Polar Year (2007-2008) IPY |
spellingShingle |
International Polar Year (2007-2008) IPY Pućko, Monika Stern, Gary A Macdonald, Robie W Barber, David G alpha- and gamma-Hexachlorocyclohexane concentrations in brine, bulk sea-ice, water and air during a CCGS Amundsen cruise to the Canadian western Arctic |
topic_facet |
International Polar Year (2007-2008) IPY |
description |
We used holes augered partially into first-year sea ice (sumps) to determine a- and g-HCH concentrations in sea-ice brine. The overwintering of the CCGS Amundsen in the Canadian western Arctic, as part of the Circumpolar Flaw Lead (CFL) System Study, provided the circumstances to allow brine to accumulate in sumps sufficiently to test the methodology. We show, for the first time, that as much as 50% of total HCHs in seawater can become entrapped within the ice crystal matrix. On average, in the winter first-year sea ice HCH brine concentrations reached 4.013 ± 0.307 ng/L and 0.423 ± 0.013 ng/L for the a- and g-isomer, respectively. In the spring, HCHs decreased gradually with time, with increasing brine volume fraction and decreasing brine salinity. These decreasing concentrations could be accounted for by both the dilution with the ice crystal matrix and under-ice seawater. We propose that the former process plays a more significant role considering brine volume fractions calculated in this study were below 20%. Levels of HCHs in the brine exceed under-ice water concentrations by approximately a factor of 3, a circumstance suggesting that the brine ecosystem has been, and continues to be, the most exposed to HCHs. |
format |
Dataset |
author |
Pućko, Monika Stern, Gary A Macdonald, Robie W Barber, David G |
author_facet |
Pućko, Monika Stern, Gary A Macdonald, Robie W Barber, David G |
author_sort |
Pućko, Monika |
title |
alpha- and gamma-Hexachlorocyclohexane concentrations in brine, bulk sea-ice, water and air during a CCGS Amundsen cruise to the Canadian western Arctic |
title_short |
alpha- and gamma-Hexachlorocyclohexane concentrations in brine, bulk sea-ice, water and air during a CCGS Amundsen cruise to the Canadian western Arctic |
title_full |
alpha- and gamma-Hexachlorocyclohexane concentrations in brine, bulk sea-ice, water and air during a CCGS Amundsen cruise to the Canadian western Arctic |
title_fullStr |
alpha- and gamma-Hexachlorocyclohexane concentrations in brine, bulk sea-ice, water and air during a CCGS Amundsen cruise to the Canadian western Arctic |
title_full_unstemmed |
alpha- and gamma-Hexachlorocyclohexane concentrations in brine, bulk sea-ice, water and air during a CCGS Amundsen cruise to the Canadian western Arctic |
title_sort |
alpha- and gamma-hexachlorocyclohexane concentrations in brine, bulk sea-ice, water and air during a ccgs amundsen cruise to the canadian western arctic |
publisher |
PANGAEA |
publishDate |
2010 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.818639 https://doi.org/10.1594/PANGAEA.818639 |
op_coverage |
MEDIAN LATITUDE: 70.493600 * MEDIAN LONGITUDE: -124.557360 * SOUTH-BOUND LATITUDE: 69.946000 * WEST-BOUND LONGITUDE: -126.172000 * NORTH-BOUND LATITUDE: 71.230000 * EAST-BOUND LONGITUDE: -121.872000 * DATE/TIME START: 2008-01-06T00:00:00 * DATE/TIME END: 2008-05-14T00:00:00 |
long_lat |
ENVELOPE(-126.172000,-121.872000,71.230000,69.946000) |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Arctic International Polar Year IPY Sea ice |
genre_facet |
Arctic Arctic International Polar Year IPY Sea ice |
op_source |
Supplement to: Pućko, Monika; Stern, Gary A; Macdonald, Robie W; Barber, David G (2010): alpha- and gamma-Hexachlorocyclohexane measurements in the brine fraction of sea ice in the Canadian High Arctic using a sump-hole technique. Environmental Science & Technology, 44(24), 9258-9264, https://doi.org/10.1021/es102275b |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.818639 https://doi.org/10.1594/PANGAEA.818639 |
op_rights |
CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1594/PANGAEA.818639 https://doi.org/10.1021/es102275b |
_version_ |
1766298787177824256 |