HR: 1340h
AN: SA53A-1159 [Abstracts]
TI: Modeling Tidal Influences on CO2 15 μm Radiance Structure Above the Mesopause; Comparisons
with SABER Data
AU: * Wintersteiner, P P
EM: winters@arcon.com
AF: Arcon Corp., 260 Bear Hill Rd., Waltham, MA 02451
United States
AU: Picard, R H
EM: Richard.Picard@hanscom.af.mil
AF: AFRL/VSBYB, 29 Randolph Rd., Hanscom AFB, MA 01731
United States
AU: Winick, J R
EM: Jeremy.Winick@hanscom.af.mil
AF: AFRL/VSBYB, 29 Randolph Rd., Hanscom AFB, MA 01731
United States
AU: Hagan, M E
EM: hagan@ucar.edu
AF: NCAR/HAO, P.O. Box 3000, Boulder, CO 80307
United States
AU: Mlynczak, M G
EM: m.g.mlynczak@larc.nasa.gov
AF: NASA/LaRC, 21 Langley Blvd., Hampton, VA 23681
United States
AU: Russell, J M
EM: James.Russell@hamptonu.edu
AF: Hampton Univ., Center for Atmospheric Sciences,
23 Tyler St., Hampton, VA 23368
United States
AU: Gordley, L L
EM: larry@gats-inc.com
AF: GATS, Inc., 11864 Cannon Blvd., Newport News, VA 23606
United States
AB:
The 15-μm emissions from carbon dioxide in the region at and above the mesopause display a very large variability that
has been difficult to explain on the basis of standard climatologies. These emissions, which comprise the most important
cooling mechanism for that region of the atmosphere, depend on the local densities of CO2 and atomic oxygen, as well as
on temperature. In this presentation, we address the hypothesis that much of the observed variability can be accounted for by
the atmospheric tides, primarily because of their effects on temperature. Using model atmospheres incorporating
perturbations derived from Global Scale Wave Model, we systematically model the limb radiance to determine its dependence on
latitude and local time for different seasons of the year. We then compare the calculated radiance and its variability, with
that seen in the continuous and nearly global observations being made by the SABER instrument on the TIMED satellite, which
indeed reveal stark contrasts with latitude and local time. We will present examples of the comparison and discuss the
implications.
DE: 0310 Airglow and aurora
DE: 0350 Pressure, density, and temperature
DE: 3359 Radiative processes
DE: 3389 Tides and planetary waves
SC: SPA-Aeronomy [SA]
MN: Fall Meeting 2005