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Related Experiment Videos

Spatial differences in persistent organochlorine pollutant concentrations between the Bering and Chukchi Seas (1993).

W M Strachan1, D A Burniston, M Williamson

  • 1Environment Canada, National Water Research Institute, Canada Centre for Inland Waters, Burlington, Ont. william.strachan@cciw.ca

Marine Pollution Bulletin
|October 17, 2001
PubMed
Summary

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This study analyzed organochlorine pesticides and PCBs in the Bering and Chukchi Seas. Hexachlorocyclohexane (HCH) and polychlorinated biphenyls (PCBs) showed significant concentrations and fluxes, indicating environmental persistence.

Area of Science:

  • Environmental Chemistry
  • Marine Pollution
  • Arctic Research

Background:

  • Organochlorine compounds, including pesticides and PCBs, are persistent environmental pollutants.
  • The Bering and Chukchi Seas are critical marine ecosystems with significant geopolitical and ecological importance.

Purpose of the Study:

  • To quantify concentrations of organochlorine pesticides and PCB congeners in water, sediment, and air samples.
  • To estimate the fluxes of these contaminants through the Bering Strait.
  • To assess the environmental fate and partitioning of these compounds in the study area.

Main Methods:

  • Joint Russian-United States expedition collecting water, sediment, and air samples.
  • Analysis of 19 organochlorine pesticides, 11 chlorobenzenes, and 113 PCB congeners.

Related Experiment Videos

  • Calculation of contaminant fluxes and fugacity ratios.

    • Main Results:

    • Hexachlorocyclohexane (HCH) and polychlorinated biphenyls (PCBs) were detected in most samples, with highest HCH concentrations in open waters of the Bering Strait.
    • PCB and DDT concentrations were generally higher in the Bering Sea compared to the Chukchi Sea.
    • Estimated fluxes indicated significant transport of HCH and PCBs through the Bering Strait, with HCH degassing and PCBs absorbing in the studied seas.

    Conclusions:

    • Organochlorine contaminants are present in the Bering and Chukchi Seas, with varying distribution and partitioning.
    • The Bering Strait acts as a conduit for contaminant transport between the Pacific and Arctic Oceans.
    • Further research is needed to understand the long-term ecological impacts of these persistent pollutants.