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8 - Atmospheric buoyancy-driven flows

Published online by Cambridge University Press:  05 April 2012

Sylvie Malardel
Affiliation:
Meteo-France, Toulouse, France
Eric P. Chassignet
Affiliation:
Florida State University
Claudia Cenedese
Affiliation:
Woods Hole Oceanographic Institution, Massachusetts
Jacques Verron
Affiliation:
Centre National de la Recherche Scientifique (CNRS), Grenoble
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Summary

Introduction

The Atmosphere

The atmosphere, like the ocean, is a stratified fluid highly influenced by the rotation of the Earth.

But, unlike the ocean, the atmosphere is a mixture of gases known as air.

The composition of the gas layer around the Earth has evolved very slowly since the time of its formation. Thanks to the appearance of life about 3.5 billion years ago, the main constituents of the air are now nitrogen (N2, about 78%) and oxygen (O2, about 21%). Other minor constituents are argon (1%), ozone, carbon dioxide, and water vapor.

The air near the surface is about 1,000 times lighter than the water in the ocean. It is also much more compressible. The mean state of the atmosphere is stably stratified and is in hydrostatic equilibrium (Figure 8.1). The first 10–15 km of the atmosphere, known as the troposphere, contain nearly 90% of the atmospheric mass. This is the layer where the weather occurs. The bottom of the troposphere, the boundary layer (BL), is directly influenced by the surface (land or ocean). Its mean depth is about 1 km, but depth can reduce to a few tens of meters on a cold winter day and expand to several kilometers on a warm, turbulent, summer day. The layer above the troposphere, called the stratosphere, is stably stratified. The stratosphere is the layer where the ozone chemistry protects the air and the surface below from incoming ultraviolet.

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Chapter
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Buoyancy-Driven Flows , pp. 312 - 337
Publisher: Cambridge University Press
Print publication year: 2012

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References

Bjerknes, J., and H., Solberg, 1922: Life cycle of cyclones and the polar front theory of atmospheric circulation. Geofys. Publ. 3, 1–18.Google Scholar
Bohren, C. F., and B. A., Albrecht, 1998: Atmospheric Thermodynamics. Oxford University Press, Oxford, New York.
Comet, F. M. L. (1996). Anticipating convective storm structure and evolution. CD-ROM.
Egger, J., 1985: Slope winds and the axisymmetric circulation over antartctica. J. Atmos. Sci. 42, 1859–1867.Google Scholar
Egger, J., 1994: Antarctic slope winds and the polar stratospheric vortex. J. Atmos. and Terrest. Phys. 56, 1067–1072.Google Scholar
Gill, A. E., 1982: Atmosphere–Ocean Dynamics, vol. 30. Academic Press, New York, London.
Holton, J. R., 1992: Dynamic Meteorology, 3rd ed., Academic Press, New York, London.
Hoskins, B. J., 1975: The geostrophic momentum approximation and the semigeostrophic equations. J. Atmos. Sci. 32, 233–242.Google Scholar
Hoskins, B. J., and F. P., Bretherton, 1972: Atmospheric frontogenesis models: Mathematical formulation and solutions. J. Atmos. Sci. 29, 11–37.Google Scholar
Houze, R. A., 1993: Cloud Dynamics. Academic Press, San Diego.
James, I. N., 1994: Introduction to Circulating Atmospheres. Cambridge University Press, Cambridge.
Malardel, S., 2009: Fondamentaux de Météorologie. Cépadues Editions, Toulouse.
McIlveen, R., 1992: Fundamentals of Weather and Climate, 2nd ed. Chapman & Hall, Oxford.
Pedlosky, J., 1987: Geophysical Fluid Dynamics. Springer-Verlag, Berlin.
Weisman, M., and Przybylinski, R., 1997–1999: Mesoscale convective systems: Squall lines and bow echoes. Web site. E. A. O. COMET Program.

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