Airglow Observation and Ray-Tracing Simulation of Gravity Waves in Antarctica.

Details Airglow Observation and Ray-Tracing Simulation of Gravity Waves in Antarctica. Airglow Observation and Ray-Tracing Simulation of Gravity Waves in Antarctica.

May 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001agusm..sa22a16l&link_type=abstract

American Geophysical Union, Spring Meeting 2001, abstract #SA22A-16

Physics

0310 Airglow And Aurora, 3332 Mesospheric Dynamics, 3334 Middle Atmosphere Dynamics (0341, 0342), 3367 Theoretical Modeling, 3384 Waves And Tides

Scientific paper

Gravity waves are well known to transport significant amounts of momentum flux from the lower atmosphere into the middle atmosphere, where it drives the wind and seasonal temperature variations of the mesosphere. In this study, the behaviour, characteristics and propagation effects of gravity waves in the high-latitude southern hemisphere are investigated using both observation and simulation. An analysis of airglow images from Halley, Antarctica (76oS, 26oW) during the summer period of 2000, reveals strong and persistent wave activity. Measurements of wavelength, velocity and directionality of these waves are taken and compared to similar results from previous airglow campaigns from around the globe. To compliment these recent observations, the Gravity-wave Regional or Global Ray Tracer (GROGRAT) model is used with HWM-93 and ECMWF background wind fields, to simulate gravity wave propagation from the lower atmosphere and help identify potential source regions for these waves. It is hoped that by using these resources we can improve our understanding of gravity wave activity in Antarctica.

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