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  1. Article

    Open Access

    Ubiquitous atmospheric production of organic acids mediated by cloud droplets

    Atmospheric acidity is increasingly determined by carbon dioxide and organic acids1–3. Among the latter, formic acid facilitates the nucleation of cloud droplets4 and contributes to the acidity of clouds and rain...

    B. Franco, T. Blumenstock, C. Cho, L. Clarisse, C. Clerbaux, P.-F. Coheur… in Nature (2021)

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    Article

    Recent Northern Hemisphere stratospheric HCl increase due to atmospheric circulation changes

    Policies have been in place since 1987 to reduce the release of chlorine atoms in the stratosphere, where they deplete ozone; here observations show that since 2007 hydrogen chloride has been increasing in the...

    E. Mahieu, M. P. Chipperfield, J. Notholt, T. Reddmann, J. Anderson… in Nature (2014)

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    Article

    MIPAS-Transall Observations of the Variability of CLONO2 during the Arctic Winter of 1994/95

    In the winter of 1994/95 the German Transall research aircraft performed 5 campaigns in the European Arctic with 22 flights altogether. An extensive dataset of HNO3, ClONO2 and O3 column amounts was obtained b...

    N. Glatthor, C.E. Blom, T. Blumenstock, H. Fischer… in Journal of Atmospheric Chemistry (1998)