Instabilities in a penetrative atmosphere

Details Instabilities in a penetrative atmosphere Instabilities in a penetrative atmosphere

Jun 1979

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979ap%26ss..63..103p&link_type=abstract

Astrophysics and Space Science, vol. 63, no. 1, June 1979, p. 103-115.

Astronomy and Astrophysics

Astrophysics

2

Acoustic Propagation, Atmospheric Models, Convective Flow, Flow Stability, Gravity Waves, Stellar Atmospheres, Atmospheric Stratification, Energy Dissipation, Modal Response, Optical Thickness, Propagation Modes, Radiative Transfer, Stellar Models

Scientific paper

The effect of convective penetration into an overlying stable layer on the degree of instability of convective, gravity, and acoustic modes is studied. A plane-parallel model atmosphere consisting of convectively unstable and stable layers of finite depths is considered. Radiative dissipation is taken into account by means of Newton's law of cooling, which is applicable to optically thin atmospheres. It is shown that convective penetration promotes instability of convective, gravity, and acoustic modes under suitable conditions.

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