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Laboratory investigation of non-steady penetrative convection

Published online by Cambridge University Press:  28 March 2006

J. W. Deardorff ,
G. E. Willis  and
D. K. Lilly
J. W. Deardorff
Affiliation:
National Center for Atmospheric Research, Boulder, Colorado
G. E. Willis
Affiliation:
National Center for Atmospheric Research, Boulder, Colorado
D. K. Lilly
Affiliation:
National Center for Atmospheric Research, Boulder, Colorado
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Abstract

Laboratory experiments of non-steady penetrative convection in water are performed that closely simulate the lifting of an atmospheric inversion above heated ground. Vertical profiles of horizontally averaged temperature and heat flux are measured and interpreted. The rate at which kinetic energy is destroyed by the downward heat flux in the vicinity of the inversion base is found to be a very small fraction of the rate at which it is generated in the lower convective region. The interface separating the convective region from the stable region is examined and its rate of rise explained.

Type
Research Article
Information
Journal of Fluid Mechanics , Volume 35 , Issue 1 , 16 January 1969 , pp. 7 - 31
Copyright
© 1969 Cambridge University Press

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References

Ball, F. K. 1960 Control of inversion height by surface heating Quart. J. Roy. Meteor. Soc. 86, 483–94.Google Scholar
Cromwell, T. 1960 Pycnoclines created by mixing in an aquarium tank J. Mar. Res. 18, 73–82.Google Scholar
Deardorff, J. W. 1967 Empirical dependence of the eddy coefficient for heat upon stability above the lowest 50 m J. Appl. Meteor. 6, 631–43.Google Scholar
Globe, S. & Dropkin, D. 1958 Natural convection heat transfer in liquids confined by two horizontal plates and heated from below. 1958 Heat Transfer and Fluid Mechanics. Inst. Berkeley: Univ. of Calif. pp. 156–65.
Izumi, T. 1964 Evolution of temperature and velocity profiles during breakdowns of a nocturnal inversion and a low level jet J. Appl. Meteor. 3, 70–82.Google Scholar
Kato, H. 1967 On the penetration of a turbulent layer into stratified fluid. The Johns Hopkins Gravitohydrodynamics Laboratory Rep. no. 2, October 1967. Baltimore, Maryland.
Kraus, E. B. & Turner, J. S. 1967 A one-dimensional model of the seasonal thermocline. Part II. The general theory and its consequences Tellus, 19, 98–106.Google Scholar
Lenschow, D. H. & Johnson, W. B. 1968 Concurrent airplane and balloon measurements of atmospheric boundary-layer structure over a forest J. Appl. Meteor. 7, 79–89.Google Scholar
Lettau, H. H. & Davidson, B. 1957 Exploring the Atmosphere's First Mile. Vols. 1 and 2. New York: Pergamon.
Lilly, D. K. 1968 Models of cloud-topped mixed layers under a strong inversion Quart. J. Roy. Meteor. Soc. 94, 292–309.Google Scholar
Phillips, O. M. 1966 The Dynamics of the Upper Ocean. Cambridge University Press.
Priestley, C. H. B. 1959 Turbulent Transfer in the Lower Atmosphere. University of Chicago Press.
Rouse, H. & Dodu, J. 1955 Turbulent diffusion across a density discontinuity La Houille Blanche, 10, 522–32.Google Scholar
Telford, J. W. 1967 The convective mechanism in clear air J. Atmos. Sci. 23, 652–66.Google Scholar
Townsend, A. A. 1959 Temperature fluctuations over a heated horizontal surface J. Fluid Mech. 5, 209–41.Google Scholar
Townsend, A. A. 1964 Natural convection in water over an ice surface Quart. J. Roy. Meteor. Soc. 90, 248–59.Google Scholar
Turner, J. S. & Kraus, E. B. 1967 A one-dimensional model of the seasonal thermocline. Part I. A laboratory experiment and its interpretation Tellus, 19, 88–97.Google Scholar
Veronis, G. 1963 Penetrative convection Astrophys. J. 137, 641–63.Google Scholar