An Observational Investigation of Penetrative Convection

Niels Otto Jensen, D. H. Lenschow

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    Abstract

    Data taken during the Air Mass Transformation Experiment (AMTEX) by the NCAR Electra aircraft have proven useful for investigating the structure of thermals penetrating into the turbulent inversion layer which caps the convective mixed layer. Variances, covariances, spectra and cospectra of potential temperature, the three air velocity components, and humidity are computed to illustrate the dynamic processes occurring in this region. Two spectral maxima occur in vertical velocity and temperature: one at a wavelength of about 1.5 times the mixed layer depth and the other at about 200-300 m, which seems to be related to the characteristic size of a penetrating thermal
    Original languageEnglish
    JournalJournal of the Atmospheric Sciences
    Volume35
    Issue number10
    Pages (from-to)1924-1933
    ISSN0022-4928
    Publication statusPublished - 1978

    Cite this

    Jensen, N. O., & Lenschow, D. H. (1978). An Observational Investigation of Penetrative Convection. Journal of the Atmospheric Sciences, 35(10), 1924-1933.