POAM II observations of polar mesospheric clouds in the southern hemisphere

Details POAM II observations of polar mesospheric clouds in the southern hemisphere POAM II observations of polar mesospheric clouds in the southern hemisphere

May 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997adspr..19..587d&link_type=abstract

Advances in Space Research, Volume 19, Issue 4, p. 587-590.

Physics

4

Scientific paper

The POAM II instrument has been taking data for approximately three years. PMCs have been detected in all three Southern Hemisphere seasons. The POAM II PMC data set has been analyzed using a simple geometric cloud model. We find mean cloud altitudes deduced from these data are 82-83 km with a mean thickness of 2.6 km. The means of the 448.1 nm peak slant optical depth were determined to range from 1.2x10^-3 to 1.9x10^-3 for the three seasons, corresponding to cloud extinction coefficients of 3.9x10^-6 to 6.1x10^-6 km^-1, respectively. The wavelength dependence of the measured slant optical depth for the clouds with largest extinction suggest an upper limit to the modal particle radii for these clouds of approximately 70 nm.

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