Mesosphere and Lower-Thermosphere Wind Observations from a New South Pole Meteor Radar

Details Mesosphere and Lower-Thermosphere Wind Observations from a New South Pole Meteor Radar Mesosphere and Lower-Thermosphere Wind Observations from a New South Pole Meteor Radar

Dec 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002agufmsa61a..11a&link_type=abstract

American Geophysical Union, Fall Meeting 2002, abstract #SA61A-11

Physics

2427 Ionosphere/Atmosphere Interactions (0335), 3369 Thermospheric Dynamics (0358), 6952 Radar Atmospheric Physics

Scientific paper

A new meteor radar with altitude resolution was installed at the Amundsen-Scott South Pole station as part of the TIMED/CEDAR program. The radar has been operating almost continuously for 8 months. Preliminary results from late January through February 2002 have been obtained using various analysis techniques. During this period of time, the averaged hourly winds were projected onto 8 different longitude meridians in the height range spanning 80-105 km with a 5 km height resolution. Our results show the presence of waves with periods of 12, 24, and 72 hours that propagate westward and are consistent with a zonal wavenumber one longitudinal structure. A zonal wavenumber of 2 is also present at times for the semidiurnal wave period. During this period, a consistent divergent wind pattern where the wind vectors are northward (away from the pole) at all longitudes occurs from 1700-0200 UT while cross polar winds are present at all other times. This paper will present these preliminary features of the wind field and discuss future comparison with TIMED measurements and other Antarctica radar measurements.

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