Physics
Scientific paper
Dec 2001
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001agufmsa11a..07t&link_type=abstract
American Geophysical Union, Fall Meeting 2001, abstract #SA11A-07
Physics
0310 Airglow And Aurora, 3332 Mesospheric Dynamics, 3334 Middle Atmosphere Dynamics (0341, 0342)
Scientific paper
The CEDAR Mesospheric Temperature Mapper (MTM) was developed at Utah State University in 1996/7 as part of the CEDAR Phase III initiative for new research instrumentation. The MTM uses a sensitive bare CCD detector to obtain high signal-to-noise ratio ( ~100:1) images of selected emission lines in the near infrared OH (6,2) band to determine intensity and temperature perturbations induced by a wide range of atmospheric waves (periods ~10 min - ~10 hrs) with a precision of better than 2K in 3-min (or 0.5 K in 30 min). The high precision and stability of the MTM make it very well suited for long-term field measurements and extensive data sets have been obtained alongside two powerful Na lidar systems: at Ft Collins, CO (1997/98), and at the Starfire Optical Range, NM (1998/2000). These joint data sets have revealed a wealth of new information on gravity wave and tidal propagation at mesospheric heights and to date our analyses have focused on characterizing the 8-hr tide at mid-latitudes and the identification of a fall equinox transition signature associated with the penetration of stationary planetary wave energy into the upper mesosphere during the seasonal reversal of the stratospheric wind field. In this presentation we will summarize these results and will then focus on recent measurements of wave propagation (phase) and growth (amplitude) from Bear Lake Observatory, UT using an enhanced MTM capable of measuring wave signatures in the both the near infrared OH (peak altitude ~87 km) and the 02(0,1) (altitude ~94 km) emission layers. New observations using the enhanced MTM are planned as part of the NASA/NSF TIMED coordinated ground-based measurements program and the AFOSR/NSF Maui-MALT initiative.
Pendleton W. R.
Taylor Mary Jane
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