Thermospheric Neutral Wind Observations from Three Antarctic Sites Compared with Data from Two Near-Conjugate Sites in the Northern Hemisphere

Details Thermospheric Neutral Wind Observations from Three Antarctic Sites Compared with Data from Two Near-Conjugate Sites in the Northern Hemisphere Thermospheric Neutral Wind Observations from Three Antarctic Sites Compared with Data from Two Near-Conjugate Sites in the Northern Hemisphere

Dec 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011agufmsa51a1918c&link_type=abstract

American Geophysical Union, Fall Meeting 2011, abstract #SA51A-1918

Physics

[0355] Atmospheric Composition And Structure / Thermosphere: Composition And Chemistry, [0358] Atmospheric Composition And Structure / Thermosphere: Energy Deposition, [2427] Ionosphere / Ionosphere/Atmosphere Interactions, [3369] Atmospheric Processes / Thermospheric Dynamics

Scientific paper

The 2010/2011 austral summer season saw a new narrow-field Fabry-Perot Doppler spectrometer installed at Palmer station, while an existing all-sky instrument at Mawson station was returned to service by replacing an EMCCD camera that had failed two years earlier. E-region and F-region thermospheric winds recorded in 2011 by these two instruments will be presented, together with observations from a third (narrow-field) Antarctic Fabry-Perot spectrometer that has been running at Davis station since 2004. Combined observations from these three sites characterize the large-scale thermospheric circulation over Antarctica, whereas the all-sky data from Mawson also resolves small-scale features such as divergence, shear, and gravity waves. Hemispheric differences in thermospheric winds will be examined by comparing these data with corresponding northern hemisphere winds recorded by Fabry-Perot instruments located at Millstone Hill (which is approximately conjugate to Palmer) and Longyearbyen (which is approximately conjugate to Davis and Mawson.) Inter-hemispheric comparisons will consider both the average wind patterns observed from the southern and northern sites, and case studies of individual days during the March equinox when both hemispheres were in darkness.

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