Humidity fluctuations in the marine boundary layer measured at a coastal site with an infrared humidity sensor

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    Abstract

    An extensive set of humidity turbulence data has been analyzed from 22-m height in the marine boundary layer. Fluctuations of humidity were measured by an ''OPHIR'', an infrared humidity sensor with a 10 Hz scanning frequency and humidity spectra were produced. The shapes of the normalized spectra follow the established similarity functions. However the 10-min time averaged measurements underestimate the value of the absolute humidity. The importance of the humidity flux contribution in a marine environment in calculating the Obukhov stability length has been studied. Deviations from Monin-Obukhov similarity theory seem to be connected to a low correlation between humidity and temperature.
    Original languageEnglish
    JournalBoundary-Layer Meteorology
    Volume77
    Issue number3-4
    Pages (from-to)331-352
    ISSN0006-8314
    DOIs
    Publication statusPublished - 1996

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