Retrieval of ozone column densities and PMC microphysical properties from the CIPS instrument on the Aeronomy of Ice in the Mesosphere Satellite Mission

Details Retrieval of ozone column densities and PMC microphysical properties from the CIPS instrument on the Aeronomy of Ice in the Mesosphere Satellite Mission Retrieval of ozone column densities and PMC microphysical properties from the CIPS instrument on the Aeronomy of Ice in the Mesosphere Satellite Mission

Dec 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005agufmsa53a1162b&link_type=abstract

American Geophysical Union, Fall Meeting 2005, abstract #SA53A-1162

Physics

Optics

0319 Cloud Optics, 0340 Middle Atmosphere: Composition And Chemistry, 0360 Radiation: Transmission And Scattering, 0394 Instruments And Techniques

Scientific paper

The NASA Aeronomy of Ice in the Mesosphere (AIM) satellite mission will launch in September 2006, with the primary goal of determining how Polar Mesospheric Clouds (PMCs) form and why they vary. The Cloud Imaging and Particle Size (CIPS) instrument on AIM will image cloud morphology and determine the size distribution of the cloud particles by obtaining sequences of overlapping UV (265 nm) wide-angle images of terrestrial albedo. The variation of observed PMC brightness with scattering angle will be used to infer cloud particle size distributions and ice mass. In addition to measuring mesospheric cloud patterns at 83 km height, the CIPS experiment also images a brighter background contribution from Rayleigh scattering that is significantly attenuated by mesospheric ozone. A technique has been developed to use the observed angular variation of the cloud-free atmospheric albedo to infer the column ozone distribution, as well as derive the optical properties of PMC in contiguous regions of the images. The CIPS observation method is a generalization of a technique devised by R. McPeters to infer ozone from SBUV/2 data. We will also discuss how the unprecedented spatial resolution and high S/N of the CIPS images will allow the observation of the effects of large-amplitude gravity waves on ozone in the lower mesosphere.

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