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  • Assefa, Anteneh TayeUmeå universitet,Kemiska institutionen,EcoChange (författare)

Temporal Trends of PCDD/Fs in Baltic Sea Sediment Cores Covering the 20th Century

  • Artikel/kapitelEngelska2014

Förlag, utgivningsår, omfång ...

  • 2013-12-24
  • American Chemical Society (ACS),2014
  • printrdacarrier

Nummerbeteckningar

  • LIBRIS-ID:oai:DiVA.org:su-101007
  • https://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-101007URI
  • https://doi.org/10.1021/es404599zDOI
  • https://res.slu.se/id/publ/67731URI
  • https://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-85509URI
  • https://gup.ub.gu.se/publication/194617URI

Kompletterande språkuppgifter

  • Språk:engelska
  • Sammanfattning på:engelska

Ingår i deldatabas

Klassifikation

  • Ämneskategori:ref swepub-contenttype
  • Ämneskategori:art swepub-publicationtype

Anmärkningar

  • AuthorCount:7;
  • The pollution trend of polychlorinated dibenzo-p-dioxins and dibenzofurans (PCDD/Fs) in the Baltic Sea region was studied based on depth profiles of PCDD/Fs in sediment cores collected from six-offshore areas, eight coastal sites impacted by industrial/urban emissions, and one coastal reference site. A general trend was observed for the offshore and coastal reference sites with substantial increase in PCDD/F concentrations in the mid-late 1970s and peak levels during 1985-2002. The overall peak year for PCDD/Fs in Baltic Sea offshore areas was estimated (using spline-fit modeling) to 1994 +/- 5 years, and a half-life in sediments was estimated at 29 +/- 11 years. For the industrial/urban impacted coastal sites, the temporal trend was more variable with peak years occurring 1-2 decades earlier compared to offshore areas. The substantial reductions from peak levels (38 +/- 11% and 81 +/- 12% in offshore and coastal areas, respectively) reflect domestic and international actions taken for reduction of the release of PCDD/Fs to the environment. The modeled overall half-life and reductions of PCDD/Fs in offshore Baltic Sea sediment correspond well to both PCDD/F trends in European lakes without any known direct. PCDD/F sources (half-lives 30 and 32 years), and previously modeled reduction in atmospheric deposition of,PCDD/Fs to the Baltic Sea since 1990. These observations support previous findings of a common diffuse source, such as long-range air transport of atmospheric emissions, as the prime source of PCDD/Fs to the Baltic Sea region. The half-life of PCDD/Fs in Baltic Sea offshore sediments was estimated to be approximately 2 and 4-6 times longer than in semirural and urban European air, respectively. This study highlights the need for further international actions to reduce the levels of PCDD/Fs in Baltic Sea air specifically and in European air in general.

Ämnesord och genrebeteckningar

Biuppslag (personer, institutioner, konferenser, titlar ...)

  • Sobek, AnnaStockholms universitet,Institutionen för tillämpad miljövetenskap (ITM)(Swepub:su)subek (författare)
  • Sundqvist, Kristina L. (författare)
  • Cato, IngemarGothenburg University,Göteborgs universitet,Institutionen för geovetenskaper,Department of Earth Sciences(Swepub:gu)xcatin (författare)
  • Jonsson, PerStockholms universitet,Institutionen för tillämpad miljövetenskap (ITM) (författare)
  • Tysklind, MatsUmeå universitet,Kemiska institutionen,Arcum(Swepub:umu)maty0001 (författare)
  • Wiberg, KarinSwedish University of Agricultural Sciences,Sveriges lantbruksuniversitet,Institutionen för vatten och miljö,Department of Aquatic Sciences and Assessment(Swepub:slu)48881 (författare)
  • Umeå universitetKemiska institutionen (creator_code:org_t)
  • Sveriges lantbruksuniversitet

Sammanhörande titlar

  • Ingår i:Environmental Science and Technology: American Chemical Society (ACS)48:2, s. 947-9530013-936X1520-5851

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