Dynamical properties of Polar Mesospheric Clouds as observed by SNOE linked to the mesospheric temperature as observed by SABER

Details Dynamical properties of Polar Mesospheric Clouds as observed by SNOE linked to the mesospheric temperature as observed by SABER Dynamical properties of Polar Mesospheric Clouds as observed by SNOE linked to the mesospheric temperature as observed by SABER

May 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006agusmsa53a..06m&link_type=abstract

American Geophysical Union, Fall Meeting 2007, abstract #SA53A-06

Physics

3389 Tides And Planetary Waves, 3311 Clouds And Aerosols, 3332 Mesospheric Dynamics

Scientific paper

The formation of PMCs is thought to be influenced by wave motions in the summer mesosphere, which produce temperature perturbations that affect supersaturation conditions. By using the extensive SNOE PMC database we have investigated the global variability of PMCs and sought to determine their dependence on transient atmospheric motions. We compared contemporaneous measurements of mesospheric temperature as observed by SABER to SNOE PMC measurements for two northern seasons in 2002 and 2003 and one southern season 2002-2003. Because both datasets are sampled almost continuously in time and observe during both the ascending and descending parts of their orbits, they have been mapped using Salby's asynoptic FFT technique. The analysis demonstrates that global-scale, transient atmospheric motions are associated with temperature perturbations which, in spite of their relatively small amplitudes, strongly influence the longitude variability of PMCs. In particular, the 5-day wave and the 2-day wave are consistently present in both the SNOE and SABER observations.

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