Open AccessUnstable layers in the mesopause region observed with Na lidar during the Turbulent Oxygen Mixing Experiment (TOMEX) campaign
Author(s) -
Liu Alan Z.,
Roble Raymond G.,
Hecht James H.,
Larsen Miguel F.,
Gardner Chester S.
Publication year - 2004
Publication title -
journal of geophysical research: atmospheres
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.67
H-Index - 298
eISSN - 2156-2202
pISSN - 0148-0227
DOI - 10.1029/2002jd003056
Subject(s) - mesopause , thermosphere , lidar , atmospheric sciences , gravity wave , rocket (weapon) , atmospheric tide , mesosphere , convection , atmosphere (unit) , environmental science , amplitude , ionosphere , physics , meteorology , geophysics , gravitational wave , stratosphere , engineering , astrophysics , optics , aerospace engineering , quantum mechanics
The Na wind/temperature lidar located at Starfire Optical Range near Albuquerque, New Mexico, provided real time measurements of wind, temperature, and Na density in the mesopause region during the TOMEX rocket campaign in October 2000. The state of the atmosphere in which the rocket was launched into was examined using the lidar measurements. Both convectively and dynamically unstable layers were observed at various times and altitudes during the night. The low convective stability region below 90 km was found to be associated with the diurnal tide. The unstable layers are the combined results of wave and tidal perturbations. Comparison with the thermosphere/ionosphere/mesopshere/electrodynamics general circulation model (TIME‐GCM) simulation showed that the model can produce the general feature of the observed atmospheric structure (but with a much smaller diurnal amplitude in temperature), which likely leads to underestimate of instability and gravity wave effects.