Computer Science – Sound
Scientific paper
Dec 2003
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003agufmsa41b0445m&link_type=abstract
American Geophysical Union, Fall Meeting 2003, abstract #SA41B-0445
Computer Science
Sound
0340 Middle Atmosphere: Composition And Chemistry, 0350 Pressure, Density, And Temperature, 0360 Transmission And Scattering Of Radiation, 0394 Instruments And Techniques, 3360 Remote Sensing
Scientific paper
The Sounding of the Atmosphere using Broadband Emission Radiometry (SABER) experiment was launched onboard the TIMED satellite in December 2001. Mesospheric and lower thermospheric kinetic temperature (Tk) and CO2 volume mixing ratio (vmr) are simultaneously retrieved during daytime from measurements of broadband Earth limb emission in the SABER CO2 15 um and CO2 4.3 um channels, respectively. At night only Tk is retrieved from SABER measurements in the CO2 15 um channel. The Tk/CO2 retrieval algorithm includes non-local thermodynamic equilibrium processes in the inversion scheme. The CO2 concentrations needed in the nighttime Tk retrievals are taken from the TIME-GCM climatology. The quality of the daytime-retrieved CO2 profiles is assessed by comparing nighttime SABER Tk profiles with nighttime Tk observations taken from sodium lidar measurements at Fort Collins, Colorado. There are a number of days in 2002 where SABER measurements were taken over Fort Collins during daytime and nighttime hours on the same day. For the nighttime overpasses, two SABER Tk retrievals are performed for each coincidence scan: one retrieval using the TIME-GCM CO2 concentration and the other retrieval using the SABER-retrieved CO2 concentration from the corresponding daytime scan. If the SABER-lidar nighttime Tk comparisons are improved by using the SABER-retrieved CO2 profiles in the Tk retrieval, we conclude that SABER has improved our knowledge of mid-latitude CO2 abundance.
Gordley Larry L.,
Lopez-Puertas Manuel
Mertens Chris J.
Mlynczak Martin G.
Picard Richard H.
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