Thermodynamic stability and phase transitions of PSC particles

Details Thermodynamic stability and phase transitions of PSC particles Thermodynamic stability and phase transitions of PSC particles

Sep 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997georl..24.2199k&link_type=abstract

Geophysical Research Letters, Volume 24, Issue 17, p. 2199-2202

Physics

33

Atmospheric Composition And Structure, Atmospheric Composition And Structure: Cloud Physics And Chemistry, Atmospheric Composition And Structure: Middle Atmosphere-Composition And Chemistry, Atmospheric Composition And Structure: Aerosols And Particles

Scientific paper

The thermodynamic equilibrium conditions of various stratospherically relevant particles are calculated using a thermodynamic model. Due to thermodynamic constraints only certain particle combinations can exist at equilibrium in the same air mass. In particular, it is shown that liquids can coexist with solid particles over a wide range of conditions, provided that the availableH2SO4 remains in the aqueous phase. Conversely, the stability of crystalline H2SO4-containing phases is strongly affected by the formation of ice and HNO3-containing solid phases. The results are combined with laboratory data on solid phase nucleation to construct a detailed scheme for PSC formation.

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