Freezing temperatures of H2SO4/HNO3/H2O mixtures: Implications for polar stratospheric clouds

Details Freezing temperatures of H2SO4/HNO3/H2O mixtures: Implications for polar stratospheric clouds Freezing temperatures of H2SO4/HNO3/H2O mixtures: Implications for polar stratospheric clouds

Dec 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994georl..21.2709s&link_type=abstract

Geophysical Research Letters, Volume 21, Issue 24, p. 2709-2712

Physics

16

Atmospheric Composition And Structure: Cloud Physics And Chemistry, Meteorology And Atmospheric Dynamics: Polar Meteorology

Scientific paper

The freezing temperatures of H2SO4/HNO3/H2O mixtures were systematically documented. Nitric acid was found to affect freezing significantly. Measurements show that nitric acid can cause substantial supercooling over a broad composition range. However, some ternary compositions, like to those in polar stratospheric clouds (PSCs), have high freezing temperatures. The freezing of PSC particles could be controlled by the temperature and vapor pressure of both nitric acid and water in a non-linear way. Formation of polar stratospheric clouds may be forecasted on the basis of conditions of temperature and vapor contents of water and nitric acid.

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