All-Sky Imaging Measurements of an Unusually Bright Gravity Wave Event Observed Over the South-Western United States

Details All-Sky Imaging Measurements of an Unusually Bright Gravity Wave Event Observed Over the South-Western United States All-Sky Imaging Measurements of an Unusually Bright Gravity Wave Event Observed Over the South-Western United States

May 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001agusm..sa22a04s&link_type=abstract

American Geophysical Union, Spring Meeting 2001, abstract #SA22A-04

Physics

0310 Airglow And Aurora, 0341 Middle Atmosphere--, Onstituent Transport And Chemistry (3334), 0342 Middle Atmosphere--Energy Deposition, 0394 Instruments And Techniques

Scientific paper

Multi-wavelength all-sky imaging of the nighttime mesospheric emission layers can yield valuable information about the vertical structure and dynamics of the region. Wave structures occur very frequently in these layers and comprise of two main types: bands and ripples. In contrast to these types, this paper presents observations of a wave event known as a mesospheric bore which was observed on 14 November 1999 at two sites in the South-Western United States separated by over 500 km. The bore event was easily visible to the naked eye and lasted for over 2 1/2 hours. The event was observed using two wide-angle imaging systems: (1) in the OI, Na and OH nightglow emissions at the Boston University field-station at McDonald Observatory, Fort Davis, Texas; (2) in the OH emission at the Starfire Optical Range, Albuquerque, New Mexico. The intensity and temperature measurements made at the two sites provided a unique opportunity to estimate the physical extent of the bore and its time history. Simultaneous radar neutral wind measurements in the 85 to 95 km altitude region were made from the Starfire Optical Range and these indicated that a strong vertical wind shear (14 m/s/km) occurred at the time of the bore's appearance.

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