Physics
Scientific paper
Mar 2009
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009jastp..71..331h&link_type=abstract
Journal of Atmospheric and Solar-Terrestrial Physics, Volume 71, Issue 3-4, p. 331-339.
Physics
9
Aim, Sofie, Pmc, Mesosphere
Scientific paper
This work examines the first season of polar mesospheric cloud (PMC) observations from the Solar Occultation for Ice Experiment (SOFIE). SOFIE observations of temperature, water vapor, and PMC frequency, mass density, particle shape, and size distribution are used to characterize the seasonal evolution and altitude dependence of mesospheric ice and the surrounding environment. SOFIE indicates that ice is nearly always present during summer, and that the ice layer is continuous from about 81 km altitude to the mesopause and above. Ice particles are observed to be more aspherical above and below the extinction peak altitude, suggesting a relationship between particle shape and mass density. The smallest particles are observed near the top of the ice layer while the largest particles exist at low concentrations near cloud base. A strong correlation was found between water vapor and particle size with small particles existing when H2O is low. This relationship holds when examining variability in altitude, and variability over time at one altitude.
Bailey Scott M.
Gordley Larry L.,
Hervig Mark E.
Russell James M. III
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