1. Introduction * What are we going to learn in atmospheric physics? In Mteor 341: 1) Atmospheric Thermodynamics; 2) Atmospheric Hydrostatics. In Mteor.

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Presentation transcript:

1. Introduction * What are we going to learn in atmospheric physics? In Mteor 341: 1) Atmospheric Thermodynamics; 2) Atmospheric Hydrostatics. In Mteor 342: 1) Cloud Physics; 2) Atmospheric Radiation.

* Atmospheric Thermodynamics: a. Basic Concepts b. Laws (First and Second) c. Processes (Adiabatic vs Diabatic, reversible vs irreversible) d. Heterogeneous systems e. Moist Air * Atmospheric Hydrostatics: a. Hydrostatic equilibrium b. Hydrostatic stability

* What do we need atmospheric thermodynamics to do for us? Thermodynamics deals with internal transformations of the energy of a system and exchanges of energy between that system and its environment. Atmosphere, a combination of various gases surrounding the planet, is closely tied to the oceans and to surface processes.

Atmospheric thermodynamics converts the solar energy inputs to the atmosphere and to atmospheric responses such as turbulence and general circulation, and links the circulation and transfers of radiative, sensible and latent heat between the earth’s surface and the atmosphere.

* What are the relevant questions we need to answer? a.What are the governing equations? b.How do we describe the combination of atmospheric gases? c.How do we handle various gases? d.How do we handle a gas (water vapor) that changes its phase? e.How do atmospheric motions connect with thermodynamics?

* Description Frameworks : a. Eulerian – represents atmospheric behavior in terms of field properties, such as the instantaneous distributions of temperature, moisture and wind etc.; b. Lagrangian – in terms of the properties of individual air parcels, i.e., their instantaneous positions, temperature and constituent concentrations. The air parcel moves through the circulation.