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Pućko, Monika; Stern, Gary A; Barber, David G; Macdonald, Robie W; Rosenberg, B (2010): Physical properties and hexachlorocyclohexane concentrations of sea-ice, water and ice algae samples, eastern Beaufort Sea [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.818528, Supplement to: Pućko, M et al. (2010): The international polar year (IPY) circumpolar flaw lead (CFL) system study: The importance of brine processes for alpha- and gamma-hexachlorocyclohexane (HCH) accumulation or rejection in sea ice. Atmosphere-Ocean, 48(4), 244-262, https://doi.org/10.3137/OC318.2010

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Abstract:
We present evidence that both geophysical and thermodynamic conditions in sea ice are important in understanding pathways of accumulation or rejection of hexachlorocyclohexanes (HCHs). a- and g-HCH concentrations and a-HCH enantiomer fractions have been measured in various ice classes and ages from the Canadian High Arctic. Mean a-HCH concentrations reached 0.642 ± 0.046 ng/L in new and young ice (<30 cm), 0.261 ±0.015 ng/L in the first-year ice (30-200 cm) and 0.208 ±0.045 in the old ice (>200 cm). Mean g-HCH concentrations were 0.066 ± 0.006 ng/L in new and young ice, 0.040 ±0.002 ng/L in the first-year ice and 0.040 ±0.007 ng/L in the old ice. In general, a-HCH concentrations and vertical distributions were highly dependent on the initial entrapment of brine and the subsequent desalination process. g-HCH levels and distribution in sea ice were not as clearly related to ice formation processes. During the year, first-year ice progressed from freezing (accumulation) to melting (ablation). Relations between the geophysical state of the sea ice and the vertical distribution of HCHs are described as ice passes through these thermodynamic states. In melting ice, which corresponded to the algal bloom period, the influence of biological processes within the bottom part of the ice on HCH concentrations and a-HCH enantiomer fraction is discussed using both univariate and multivariate approaches.
Project(s):
International Polar Year (2007-2008) (IPY)
Coverage:
Median Latitude: 71.332303 * Median Longitude: -125.963931 * South-bound Latitude: 69.499000 * West-bound Longitude: -130.768000 * North-bound Latitude: 73.729000 * East-bound Longitude: -120.394000
Date/Time Start: 2007-10-26T00:00:00 * Date/Time End: 2008-05-25T00:00:00
Comment:
Data extracted in the frame of a joint ICSTI/PANGAEA IPY effort, see http://doi.pangaea.de/10.1594/PANGAEA.150150
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
4 datasets

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Datasets listed in this publication series

  1. Pućko, M; Stern, GA; Barber, DG et al. (2013): (Table 7) Alpha- and gamma-Hexachlorocyclohexane concentrations in sea-ice algae samples, eastern Beaufort Sea. https://doi.org/10.1594/PANGAEA.818526
  2. Pućko, M; Stern, GA; Barber, DG et al. (2010): (Table 1) Physical properties, and alpha- and gamma-Hexachlorocyclohexane concentrations of sea-ice and water samples, eastern Beaufort Sea. https://doi.org/10.1594/PANGAEA.818523
  3. Pućko, M; Stern, GA; Barber, DG et al. (2010): (Table 6) Physical properties, and alpha- and gamma-Hexachlorocyclohexane concentrations in different layers of sea-ice samples, eastern Beaufort Sea. https://doi.org/10.1594/PANGAEA.818527
  4. Pućko, M; Stern, GA; Barber, DG et al. (2010): (Table 5) Ice bulk salinity, and alpha- and gamma-Hexachlorocyclohexane concentrations of old sea-ice samples, eastern Beaufort Sea. https://doi.org/10.1594/PANGAEA.818524