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Spatial Distributions of DDTs in the Water Masses of the Arctic Ocean
Stockholms universitet, Institutionen för miljövetenskap och analytisk kemi.ORCID-id: 0000-0002-1549-7449
Stockholms universitet, Institutionen för miljövetenskap och analytisk kemi.
Stockholms universitet, Institutionen för miljövetenskap och analytisk kemi.
Antal upphovsmän: 4
Ansvarig organisation
2017 (Engelska)Ingår i: Environmental Science and Technology, ISSN 0013-936X, E-ISSN 1520-5851, Vol. 51, nr 14, s. 7913-7919Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

There is a scarcity of data on the amount and distribution of the organochlorine pesticide dichlorodiphenyltrichloroethane (DDT) and its metabolites in intermediate and deep ocean water masses. Here, the distribution and inventories of DDTs in water of the Arctic shelf seas and the interior basin are presented. The occurrence of Sigma 6DDT (0.10-66 pg L-1) in the surface water was dominated by 4,4'-DDE. In the Central Arctic Ocean increasing concentrations of DDE with depth were observed in the Makarov and Amundsen basins. The increasing concentrations down to 2500 m depth is in accordance with previous findings for PCBs and PBDEs. Similar concentrations of DDT and DDEs were found in the surface water, while the relative contribution of DDEs increased with depth, demonstrating a transformation over time and depth. Higher concentrations of DDTs were found in the European part of the Arctic Ocean; these distributions likely reflect a combination of different usage patterns, transport, and fate of these compounds. For instance, the elevated concentrations of DDTs in the Barents and Atlantic sectors of the Arctic Ocean indicate the northbound Atlantic current as a significant conveyor of DDTs. This study contributes to the very rare data on OCPs in the vast deep-water compartments and combined with surface water distribution across the Arctic Ocean helps to improve our understanding of the large-scale fate of DDTs in the Arctic.

Ort, förlag, år, upplaga, sidor
2017. Vol. 51, nr 14, s. 7913-7919
Nationell ämneskategori
Naturresursteknik Geovetenskap och miljövetenskap
Forskningsämne
SWEDARCTIC 2001, Arctic Ocean 2001; SWEDARCTIC 2005, Beringia 2005
Identifikatorer
URN: urn:nbn:se:polar:diva-8691DOI: 10.1021/acs.est.7b01369ISI: 000406086100018OAI: oai:DiVA.org:polar-8691DiVA, id: diva2:1553474
Tillgänglig från: 2017-08-21 Skapad: 2021-05-10Bibliografiskt granskad

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Sobek, Anna
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Environmental Science and Technology
NaturresursteknikGeovetenskap och miljövetenskap

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