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    European surface ozone in the extreme summer 2003

    Authors
    Solberg, S.
    Hov, Ø.
    Søvde, A.
    Isaksen, I.S. A.
    Coddeville, P.
    De Backer, H.
    Forster, C.
    Orsolini, Y.
    Uhse, K.
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    Discipline
    Earth and related Environmental sciences
    Subject
    tropospheric Ozone
    Climate Change
    feedback
    Audience
    General Public
    Scientific
    Date
    2008
    Publisher
    IRM
    KMI
    RMI
    Metadata
    Show full item record
    Description
    ] Measurements of ozone and other trace species in the European EMEP network in 2003 are presented. The European summer of 2003 was exceptionally warm, and the surface ozone data for central Europe show the highest values since the end of the 1980s. The 95th percentiles of daily maximum hourly ozone concentrations in 2003 were higher than the corresponding parameter measured in any previous year at many sites in France, Germany, Switzerland and Austria. In this paper we argue that a number of positive feedbacks between the weather conditions and ozone contributed to the elevated surface ozone. First, we calculated an extended residence time of air parcels in the atmospheric boundary layer for several sites in central Europe. Second, we show that it is likely that extensive forest fires on the Iberian Peninsula, resulting from the drought and heat, contributed to the peak ozone values in north Europe in August. Third, regional-scale model calculations indicate that enhanced levels of biogenic isoprene could have contributed up to 20% of the peak ozone concentrations. Measurements indicate elevated concentrations of isoprene compared to previous years. Sensitivity runs with a global chemical transport model showed that a reduction in the surface dry deposition due to drought and the elevated air temperature both could have contributed significantly to the enhanced ozone concentrations. Because of climate change, such heat waves may occur more frequently in the future and may gradually overshadow the effect of reduced emissions from anthropogenic sources of VOC and NOx in controlling surface ozone.
    Citation
    Solberg, S.; Hov, Ø.; Søvde, A.; Isaksen, I.S. A.; Coddeville, P.; De Backer, H.; Forster, C.; Orsolini, Y.; Uhse, K. (2008). European surface ozone in the extreme summer 2003. , Issue J. Geophys. Res.; 113, D07307, 1/16/2015, IRM,
    Identifiers
    uri: https://orfeo.belnet.be/handle/internal/8772
    Type
    Article
    Peer-Review
    Not pertinent
    Language
    eng
    Links
    NewsHelpdeskBELSPO OA Policy

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