UFR de Physique

Présentation des enseignements

AE3 - Physics and Chemistry of the Atmosphere

  • Description
  • Programme
  • Responsable
  • Documents

Modules

    UE non présente en Module M1
    UE présente en Module M2

Volume horaire

  • Cours : 0
  • Cours/TD : 40
  • TD : 0
  • TD/TP : 0
  • Stage : 0
  • Projet : 0
  • ATE : 0
  • TP : 4

Contenu du module

Part I: Physics of the atmosphere

A – Description of the Earth’s atmosphere

I - Composition

a/ Original atmosphere - Present atmosphere.

b/ Biogeochemical cycles : C, N2, O2, H2O, S.

c/ Aerosols: Formation, compositions, dimensions, residence time. Importance (health, chemistry, radiative budget).

d/ Cloud droplet formation. Cloud importance.

II – Vertical structure

a/ Based on composition.

b/ Based on temperature.

III – Vertical distribution of gaseous constituents

a/ Hydrostatic equilibrium.

b/ Pressure profile. Scale height.

c/ Reduced thickness of atmosphere and species.

B - Atmospheric motions

I - Scales. Origin of motions. Time of transport/ lifetime.

II – Atmospheric dynamics: basic equations



a/ Newton’s second law: winds far from the surface (geostrophic wind, …); close to the surface (ascendance-subsidence).

b/ Continuity equation (Lagrangian / Eulerian approaches…).
c/ First law of thermodynamics: diabatic and adiabatic processes. Potential temperature. Atmosphere stability / instability.

d/ Tropopause definitions. Troposphere-stratosphere exchanges.



e/ Tracers.

C – Radiative processes

I - Radiative energy



a/ Photometry definitions

b/ Surface characterization: reflectance

c/ Black body radiation (Planck, Wien, Stefan-Boltzmann, Kirchhoff laws). Nonblackbody case (radiative temperature). Solar radiation. Terrestrial radiation.

II – Radiation-Atmosphere interactions

a/ Basic concepts (absorption, scattering, extinction, phase function).

b/ Effects of various constituents: gas (Rayleigh scattering, absorption ); aerosol extinction (Ångström law).

c/ Radiative transfer equation: terrestrial and solar radiation cases.

d/ Chemical effects of radiation Determination of photolysis frequency (measure and modelling). Modulation factors of UV.



D – Atmospheric ozone

a/ Origin in the stratosphere (Chapman cycle), in the troposphere

b/ Global distribution in the stratosphere (Brewer-Dobson circulation); catalytic cycles

c/ Ozone depletion, the “ozone hole”. PSC (formation, type). Heterogeneous chemistry role. Depletion at all latitudes. Actions against ozone depletion (Montréal protocole, HCFC, HFC). Ozone layer recovery.

Responsable

Denis Petitprez
PC2A
Adresse Mel : Denis.Petitprez@univ-lille1.fr
Téléphone : 0320434931

Documents

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