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  • acs.est.8b05353

    Rights statement: This document is the Accepted Manuscript version of a Published Work that appeared in final form in Environmental Science and Technology, copyright © American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see https://pubs.acs.org/doi/10.1021/acs.est.8b05353

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    Embargo ends: 12/02/20

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Polycyclic Aromatic Hydrocarbons not declining in Arctic air despite global emission reduction

Research output: Contribution to journalJournal article

Published
  • Yong Yu
  • Athanasios Katsoyiannis
  • Pernilla Bohlin Nizzetto
  • Eva Brorström-Lundén
  • Jianmin Ma
  • Yuan Zhao
  • Zhiyong Wu
  • Wlodzimierz Tych
  • David Mindham
  • Ed Sverko
  • Enzo Barresi
  • Helena Dryfhout-Clark
  • Phil Fellin
  • Hayley Hung
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<mark>Journal publication date</mark>28/02/2019
<mark>Journal</mark>Environmental Science and Technology
Issue number5
Volume53
Number of pages8
Pages (from-to)2375–2382
Publication statusPublished
Early online date12/02/19
Original languageEnglish

Abstract

Two decades of atmospheric measurements of polycyclic aromatic hydrocarbons (PAHs) were conducted at three Arctic sites, i.e., Alert, Canada; Zeppelin, Svalbard; and Pallas, Finland. PAH concentrations decrease with increasing latitude in the order of Pallas>Zeppelin>Alert. Forest fire was identified as an important contributing source. Three representative PAHs, phenanthrene (PHE), pyrene (PYR), and benzo(a)pyrene (BaP) were selected for the assessment of their long-term trends. Significant decline of these PAHs was not observed contradicting the expected decline due to PAH emission reductions. A global 3-D transport model was employed to simulate the concentrations of these three PAHs at the three sites. The model predicted that warming in the Arctic would cause the air concentrations of PHE and PYR to increase in the Arctic atmosphere, while that of BaP, which tends to be particle-bound, is less affected by temperature. The expected decline due to the reduction of global PAH emissions is offset by the increment of volatilization caused by warming. This work shows that this phenomenon may affect the environmental occurrence of other anthropogenic substances, such as, the more volatile flame retardants and pesticides.

Bibliographic note

This document is the Accepted Manuscript version of a Published Work that appeared in final form in Environmental Science and Technology, copyright © American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see https://pubs.acs.org/doi/10.1021/acs.est.8b05353