Articles | Volume 15, issue 3
https://doi.org/10.5194/acp-15-1411-2015
https://doi.org/10.5194/acp-15-1411-2015
Research article
 | 
09 Feb 2015
Research article |  | 09 Feb 2015

Annual cycles of organochlorine pesticide enantiomers in Arctic air suggest changing sources and pathways

T. F. Bidleman, L. M. Jantunen, H. Hung, J. Ma, G. A. Stern, B. Rosenberg, and J. Racine

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Cited articles

Aigner, E. J., Leone, A. D., and Falconer, R. L.: Concentrations and enantiomeric ratios of organochlorine pesticides in soils of the U.S. cornbelt, Environ. Sci. Technol., 32, 1162–1168, 1998.
Becker, S., Halsall, C. J., Tych, W., Kallenborn, R., and Su, Y.: Long-term trends in atmospheric concentrations of α- and γ-HCH in the Arctic provide insight into the effects of legislation and climatic fluctuations on contaminant levels, Atmos. Environ., 42, 8225–8233, 2008.
Becker, S., Halsall, C. J., Tych, W., Kallenborn, R., Schlabach, M., and Manø, S.: Changing sources and environmental factors reduce the rates of decline of organochlorine pesticides in the Arctic atmosphere, Atmos. Chem. Phys., 12, 4033–4044, https://doi.org/10.5194/acp-12-4033-2012, 2012.
Bidleman, T. F., Jantunen, L. M., Helm, P. A., Brorström-Lundén, E., and Juntto, S.: Chlordane enantiomers and temporal trends of chlordane isomers in arctic air, Environ. Sci. Technol., 36, 539–544, 2002.
Bidleman, T. F., Wong, F., Backe, C., Södergren, A., Brorström-Lundén, E., Helm, P. A., and Stern, G. A.: Chiral signatures of chlordanes indicate changing sources to the atmosphere over the past 30 years, Atmos. Environ., 38, 5963–5970, 2004.
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Short summary
Canadian Arctic air samples were analysed for enantiomers (mirror-image isomers) of pesticides α-hexachlorocyclohexane (α-HCH), trans-chlordane (TC) and cis-chlordane (CC). Annual cycles of enantiomer proportions suggested greater emission of microbially degraded residues from water and soil in warm vs. cold seasons. Enantiomer profiles may change in the future with rising contributions from secondary sources, monitoring them could increase the forensic capability in air monitoring programs.
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