Auroral effects on midlatitude semidiurnal tides

Details Auroral effects on midlatitude semidiurnal tides Auroral effects on midlatitude semidiurnal tides

Mar 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991georl..18..412f&link_type=abstract

Geophysical Research Letters (ISSN 0094-8276), vol. 18, March 1991, p. 412-415.

Physics

9

Atmospheric General Circulation Models, Atmospheric Tides, Auroral Zones, Diurnal Variations, Midlatitude Atmosphere, Computerized Simulation, Energy Sources, Polar Caps, Solar Cycles

Scientific paper

The effect of auroral activity on midlatitude semidiurnal tides was investigated in simulations from the NCAR Thermosphere/Ionosphere GCM (TIGCM). The 24-hr cycle of the TIGM calculated the neutral wind and the temperatures for four levels of auroral activity. The modeled semidiurnal midlatitude tidal response was determined by the magnitude and the phasing of the waves generated in response to in situ solar forcing and the auroral momentum and energy sources. The simulations demonstrated the sensitivity of the model thermospheric tides to the level of geomagnetic activity, with the response being largest in the upper thermosphere.

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