PMC Variability Observed in Aura OMI Data

Details PMC Variability Observed in Aura OMI Data PMC Variability Observed in Aura OMI Data

Dec 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008agufmsa53d..02d&link_type=abstract

American Geophysical Union, Fall Meeting 2008, abstract #SA53D-02

Physics

0340 Middle Atmosphere: Composition And Chemistry, 0394 Instruments And Techniques, 1640 Remote Sensing (1855), 1650 Solar Variability (7537), 3360 Remote Sensing

Scientific paper

The Ozone Monitoring Instrument (OMI) is a hyperspectral nadir-viewing spectrometer that has been flying on the EOS Aura spacecraft since July 2004. OMI data cover the spectral range 265-500 nm, and can be analyzed using a modified version of the Solar Backscatter Ultraviolet (SBUV) polar mesospheric cloud (PMC) detection algorithm. OMI's smaller pixel size (13 km x 48 km at nadir) and 110° cross-track viewing geometry allow observations for 6-8 consecutive orbits at most locations between 70° and 90° latitude on a daily basis. This provides us with the opportunity to directly observe PMC local time variability and evaluate its dependence on latitude and longitude. Results from four PMC seasons in each hemisphere will be presented. OMI is also the first instrument to make regular PMC measurements up to 90° latitude in both hemispheres. We will discuss how results obtained from the extended OMI spatial coverage compare with predicted near-polar behavior from previous measurements.

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