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Current use pestici...
Current use pesticide and legacy organochlorine pesticide dynamics at the ocean-sea ice-atmosphere interface in resolute passage, Canadian Arctic, during winter-summer transition
- Article/chapterEnglish2017
Publisher, publication year, extent ...
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Elsevier BV,2017
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printrdacarrier
Numbers
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LIBRIS-ID:oai:DiVA.org:umu-132072
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https://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-132072URI
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https://doi.org/10.1016/j.scitotenv.2016.12.122DOI
Supplementary language notes
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Language:English
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Summary in:English
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Subject category:ref swepub-contenttype
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Subject category:art swepub-publicationtype
Notes
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Here, we present the first detailed analysis of processes by which various current use pesticides (CUPs) and legacy organochlorine pesticides (OCPs) are concentrated in melt ponds that form on Arctic sea ice in the summer, when surface snow is melting and ice eventually breaks up. Four current use pesticides (dacthal, chlorpyrifos, trifluralin, and pentachloronitrobenzene) and one legacy organochlorine pesticide (α-hexachlorocyclohexane) were detected in ponds in Resolute Passage, Canadian Arctic, in 2012. Melt-pond concentrations changed over time as a function of gas exchange, precipitation, and dilution with melting sea ice. Observed increases in melt-pond concentrations for all detected pesticides were associated with precipitation events. Dacthal reached the highest concentration of all current use pesticides in ponds (95 ± 71 pg L− 1), a value exceeding measured concentrations in the under-ice (0 m) and 5 m seawater by > 10 and > 16 times, respectively. Drainage of dacthal-enriched pond water to the ocean during ice break-up provides an important ice-mediated annual delivery route, adding ~ 30% of inventory in the summer Mixed Layer (ML; 10 m) in the Resolute Passage, and a concentrating mechanism with potential implications for exposures to organisms such as ice algae, and phytoplankton.
Subject headings and genre
Added entries (persons, corporate bodies, meetings, titles ...)
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Stern, Gary A.
(author)
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Burt, Alexis E.
(author)
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Jantunen, Liisa M.
(author)
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Bidleman, Terry F.Umeå universitet,Kemiska institutionen,Arcum ; EcoChange(Swepub:umu)tefr0002
(author)
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Macdonald, Robie W.
(author)
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Barber, David G.
(author)
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Geilfus, Nicolas-X.
(author)
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Rysgaard, Søren
(author)
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Umeå universitetKemiska institutionen
(creator_code:org_t)
Related titles
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In:Science of the Total Environment: Elsevier BV580, s. 1460-14690048-96971879-1026
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