Observations of Equatorial Thermospheric Dynamics at Arequipa, Peru, during Magnetic Storms

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0310 Airglow And Aurora, 3369 Thermospheric Dynamics (0358)

Scientific paper

Measurements of thermospheric winds and temperatures were obtained at Arequipa, Peru, during five major magnetic storm periods between 1996 and 2002. The instrument used was a pressure scanning Fabry-Perot interferometer observing at the wavelength of 630 nm. The weather for these storm periods were generally clear so that measurements were obtained over successive nights, and the behavior of the thermosphere could be followed from the time of initiation to the termination of the magnetic activity. The results showed no particular parttern of behavior of the thermosphere in comparing the results for these storms. Among the highlights of the observed features were a reduction of the zonal thermospheric wind during the evening hours after twilight and a significant heating of the thermosphere during the course of the storm activity. The meridional winds were not larger than 100 ms{-1} during any one storm period.

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