High resolution Polar Mesospheric Cloud images from the Cloud Imaging and Particle Size Experiment: Implications for cloud appearance and ice particle growth

Details High resolution Polar Mesospheric Cloud images from the Cloud Imaging and Particle Size Experiment: Implications for cloud appearance and ice particle growth High resolution Polar Mesospheric Cloud images from the Cloud Imaging and Particle Size Experiment: Implications for cloud appearance and ice particle growth

Dec 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008agufmsa53d..01r&link_type=abstract

American Geophysical Union, Fall Meeting 2008, abstract #SA53D-01

Physics

0300 Atmospheric Composition And Structure, 0305 Aerosols And Particles (0345, 4801, 4906), 0340 Middle Atmosphere: Composition And Chemistry, 0394 Instruments And Techniques

Scientific paper

The Cloud Imaging and Particle Size (CIPS) Experiment on the Aeronomy of Ice in the Mesosphere Mission (AIM) has the ability to image Polar Mesospheric Clouds (PMC) with approximately 2 km resolution. In addition, the CIPS has a large field of view that allows the same region of space (at high latitude) to be viewed on several successive orbits with a cadence of about ninety minutes. The overlapping CIPS data reveal significant variations in PMC albedo and occurrence from orbit to orbit, with bright clouds containing relatively large particles appearing in regions that were essentially cloud free ninety minutes earlier. The implications for PMC growth and lifetimes are discussed with respect to modeling results. In addition, the high resolution data provide a new view of clouds and reveal longitudinal variability in cloud structure that at times resembles near-coherent wave patterns, and at times is dominated by circular cloud features. It is suggested that this variability is associated with longitudinal variations in gravity wave activity.

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