Joint Investigation of Mesospheric Gravity Wave Characteristics and Dynamics over South Pole Station (90°S) during the Austral Winter 2010

Details Joint Investigation of Mesospheric Gravity Wave Characteristics and Dynamics over South Pole Station (90°S) during the Austral Winter 2010 Joint Investigation of Mesospheric Gravity Wave Characteristics and Dynamics over South Pole Station (90°S) during the Austral Winter 2010

Dec 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010agufmsa31b1724p&link_type=abstract

American Geophysical Union, Fall Meeting 2010, abstract #SA31B-1724

Physics

[0310] Atmospheric Composition And Structure / Airglow And Aurora, [3332] Atmospheric Processes / Mesospheric Dynamics, [3394] Atmospheric Processes / Instruments And Techniques

Scientific paper

Atmospheric gravity waves propagating from the troposphere up to the lower thermosphere play a key role in the thermal structure and large-scale circulation of the mid-atmosphere. These waves have been extensively studied using wide-angle CCD imagers, but mostly from sites located at low and mid-latitudes. To better quantify the effects of gravity waves at MLT heights (~80-100 km) over Antarctica, and improve the knowledge on their propagation characteristics, wave momentum flux, and geographic variability, several optical instruments were deployed at the Amundsen-Scott South Pole Station (90°S) and jointly operated during the austral winter 2010 (April to August). An all-sky OH imager and a wide field of view (120°) mesospheric temperature mapper (Utah State University) collocated with a meteor radar and an all-sky Na imager (University of Colorado, NWRA) provided key measurements to study the main characteristics of the short-period gravity waves propagating over the station, including horizontal wavelength, propagation direction, observed period and phase speed, and mesospheric winds. In this presentation we will summarize preliminary results obtained during the winter 2010 season.

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