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    An exemplary case of a bromine explosion event linked to cyclone development in the Arctic

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    Authors
    Blechschmidt, A.-M.
    Richter, A.
    Burrows, J.P.
    Kaleschke, L.
    Strong, K.
    Theys, N.
    Weber, M.
    Zhao, X.
    Zien, A.
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    Discipline
    Earth and related Environmental sciences
    Subject
    atmospheric chemistry
    atmospheric deposition
    atmospheric plume
    bromine
    cyclone
    satellite data
    stratosphere-troposphere interaction
    Arctic Ocean
    Beaufort Sea
    Audience
    Scientific
    Date
    2016
    Metadata
    Show full item record
    Description
    Intense, cyclone-like shaped plumes of tropospheric bromine monoxide (BrO) are regularly observed by GOME-2 on board the MetOp-A satellite over Arctic sea ice in polar spring. These plumes are often transported by high-latitude cyclones, sometimes over several days despite the short atmospheric lifetime of BrO. However, only few studies have focused on the role of polar weather systems in the development, duration and transport of tropospheric BrO plumes during bromine explosion events. The latter are caused by an autocatalytic chemical chain reaction associated with tropospheric ozone depletion and initiated by the release of bromine from cold brine-covered ice or snow to the atmosphere. In this manuscript, a case study investigating a commashaped BrO plume which developed over the Beaufort Sea and was observed by GOME-2 for several days is presented. By making combined use of satellite data and numerical models, it is shown that the occurrence of the plume was closely linked to frontal lifting in a polar cyclone and that it most likely resided in the lowest 3 km of the troposphere. In contrast to previous case studies, we demonstrate that the dry conveyor belt, a potentially bromine-rich stratospheric air stream which can complicate interpretation of satellite retrieved tropospheric BrO, is spatially separated from the observed BrO plume. It is concluded that weather conditions associated with the polar cyclone favoured the bromine activation cycle and blowing snow production, which may have acted as a bromine source during the bromine explosion event. © 2016 Author(s).
    Citation
    Blechschmidt, A.-M.; Richter, A.; Burrows, J.P.; Kaleschke, L.; Strong, K.; Theys, N.; Weber, M.; Zhao, X.; Zien, A. (2016). An exemplary case of a bromine explosion event linked to cyclone development in the Arctic. , Atmospheric Chemistry and Physics, Vol. 16, Issue 3, 1773-1788, DOI: 10.5194/acp-16-1773-2016.
    Identifiers
    uri: https://orfeo.belnet.be/handle/internal/2666
    doi: http://dx.doi.org/10.5194/acp-16-1773-2016
    scopus: 2-s2.0-84958279572
    Type
    Article
    Peer-Review
    Yes
    Language
    eng
    Links
    NewsHelpdeskBELSPO OA Policy

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