Water vapour and ozone profiles in the midlatitude upper troposphere

Geraint Vaughan, C. Cambridge, L. Dean, A. W. Phillips

    Research output: Contribution to journalArticlepeer-review


    We present an investigation of upper tropospheric humidity profiles measured with a standard radiosonde, the Vaisala RS80-A, and a commercial frost-point hygrometer, the Snow White. Modifications to the Snow White, to enable the mirror reflectivity and Peltier cooling current to be monitored during flight, were found to be necessary to determine when the instrument was functioning correctly; a further modification to prevent hydrometeors entering the inlet was also implemented. From 23 combined flights of an ozonesonde, radiosonde and Snow White between September 2001 and July 2002, clear agreement was found between the two humidity sensors, with a mean difference of
    Original languageEnglish
    Pages (from-to)963-971
    Number of pages8
    JournalAtmospheric Chemistry and Physics
    Issue number4
    Publication statusPublished - 2005


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