Long-term Meteor Radar Observations of Atmospheric Winds and Tides in the Polar Mesosphere and Lower Thermosphere above Svalbard and Tromso

Details Long-term Meteor Radar Observations of Atmospheric Winds and Tides in the Polar Mesosphere and Lower Thermosphere above Svalbard and Tromso Long-term Meteor Radar Observations of Atmospheric Winds and Tides in the Polar Mesosphere and Lower Thermosphere above Svalbard and Tromso

Dec 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007agufmsa31a..05a&link_type=abstract

American Geophysical Union, Fall Meeting 2007, abstract #SA31A-05

Other

3332 Mesospheric Dynamics, 3369 Thermospheric Dynamics (0358), 3389 Tides And Planetary Waves

Scientific paper

We have been running meteor radars in Svalbard and Tromso for 7 and 4 years, respectively, to observe wind and waves, especially tides, in the polar upper mesosphere and lower thermosphere. The results hence suggest the climatology and variability of tides in the polar region where wave disturbance comes from below forced by insolation absorption, modified by the intervening middle atmosphere and also from above in relation to solar disturbances. Furthermore behavior at polar latitudes is characteristic of Hough and velocity expansion functions. Collaborative circumpolar and bipolar comparison with MF radars depicts global nature of waves and also localized comparison with EISCAT, SOUSY MST and MF radars helps to clarify intercomparison of wind measurement while near-by meteor radars tells us about local disturbances due to smaller-scale gravity-waves. Non-migrating tide as semidiurnal zonal wavenumber 1 and diurnal zonally symmetric mode which might be attributed to interaction of migrating tide with planetary waves is relevant in view of its dominance at higher latitudes. Neutral temperature is also derivable from decay rate of echo returns and long term temperature variation and temperature tide are the other issues of interest.

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