Kylin, Henrik
- Department of Aquatic Sciences and Assessment, Swedish University of Agricultural Sciences
Abstract
Hexachlorocyclohexanes (HCHs) in the surface water of the Canadian Archipelago and south Beaufort Sea were measured in summer, 1999. Overall concentrations of HCH isomers were in order of abundance: alpha-HCH (3.5 +/- 1.2 ng L-1) > gamma-HCH (0.31 +/- 0.07 ng L-1) > beta-HCH (0.10 +/- 0.03 ng L-1). Concentrations and ratios of alpha-HCH/gamma-HCH decreased significantly (p < 0.001 to 0.003) from west to east, but there was no significant variation in alpha-HCH/ beta-HCH. The (+) enantiomer of alpha-HCH was preferentially degraded, with enantiomer fractions (EFs) ranging from 0.432-0.463 and increasing significantly (p < 0.001) from westtoeast. Concentrations alsovaried latitudinally for alpha-HCH and gamma-HCH (p < 0.002) but not for beta-HCH. Principal component analysis with variables alpha-HCH and gamma-HCH concentrations, EF, latitude, and longitude accounted for 71% (PC 1) and 16% (PC 2) of the variance. Mixing in the eastern Archipelago was modeled by assuming three end members with characteristic concentrations of alpha-HCH and gamma-HCH, The model accounted for the observed concentrations and higher EFs of alpha-HCH at the eastern stations.
Keywords
POP; Arctic; Arktis; havsvatten; Northwest passage; Nordvästpassagen
Published in
Environmental Science and Technology
2007, volume: 41, number: 8, pages: 2688-2695
SLU Authors
UKÄ Subject classification
Environmental Sciences and Nature Conservation
Publication identifier
- DOI: https://doi.org/10.1021/es062375b
Permanent link to this page (URI)
https://res.slu.se/id/publ/14511