Equilibrium temperatures of spherical ice particles in the upper atmosphere and implications for noctilucent cloud formation

Details Equilibrium temperatures of spherical ice particles in the upper atmosphere and implications for noctilucent cloud formation Equilibrium temperatures of spherical ice particles in the upper atmosphere and implications for noctilucent cloud formation

Feb 1977

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977jgr....82..961g&link_type=abstract

Journal of Geophysical Research, vol. 82, Feb. 20, 1977, p. 961-966.

Physics

4

Ice Nuclei, Mesosphere, Noctilucent Clouds, Temperature Profiles, Cloud Physics, Radii, Refractivity, Summer, Temperature Gradients, Thermal Radiation, Thermodynamic Equilibrium

Scientific paper

Temperatures of ice spheres in the mesosphere are calculated by establishing an equation for the balance among the power absorbed by the particle from the solar and terrestrial radiation fields, the power emitted by the particle as thermal radiation, and the power transferred from the particle to the atmosphere by collisions with air molecules. In some cases, the particle temperature that ensues can result in a saturation vapor pressure at the ice surface that exceeds the pressure of the ambient atmosphere, and the particle therefore can not continue to exist. Equilibrium particle temperatures have been analyzed to study atmospheric exclusion limits for ice spheres in the mesosphere as a function of particle radius and altitude.

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