Polar Mesospheric Clouds Observed with the Improved Limb Atmospheric Spectrometer in the Southern Hemisphere

Details Polar Mesospheric Clouds Observed with the Improved Limb Atmospheric Spectrometer in the Southern Hemisphere Polar Mesospheric Clouds Observed with the Improved Limb Atmospheric Spectrometer in the Southern Hemisphere

Dec 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001agufmsa41b0739s&link_type=abstract

American Geophysical Union, Fall Meeting 2001, abstract #SA41B-0739

Physics

0305 Aerosols And Particles (0345, 4801), 0320 Cloud Physics And Chemistry, 0340 Middle Atmosphere: Composition And Chemistry, 3332 Mesospheric Dynamics

Scientific paper

The Improved Limb Atmosphere Spectrometer (ILAS) onboard the sun-synchronous polar orbiting satellite ADEOS (Advanced Earth Observing Satellite) made measurements from November 1996 to June 1997. ILAS observed polar mesospheric clouds (PMCs) in the southern hemisphere high latitude region during the 1996-1997 summer. The ILAS was equipped with both the visible and the infrared spectrometers. The infrared spectrometer has 44 elements that cover 6.21-11.77 μ m, and the visible spectrometer has 1024 elements that cover 753-784 nm. PMCs were found from the atmospheric extinction profiles obtained with the visible spectrometer, Average cloud peak altitude is 81.8+/-2.6 km. The component of PMCs was infrared to contain water-ice by comparing the observation spectrum of the infrared spectrometer and the Mie scattering theory calculation. Furthermore, we estimated the particle radius of PMCs from both the infrared spectrometer and the visible spectrometer data. The effective radius of PMCs was estimated to be 62+/-13 nm from the infrared spectrometer, and also estimated to be 82+/-31 nm from the visible spectrometer. These values were consistent with previous satellite measurements.

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