Transport of aurorally produced N/2D/ by winds in the high latitude thermosphere

Details Transport of aurorally produced N/2D/ by winds in the high latitude thermosphere Transport of aurorally produced N/2D/ by winds in the high latitude thermosphere

Nov 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982p%26ss...30.1091g&link_type=abstract

Planetary and Space Science, vol. 30, Nov. 1982, p. 1091-1105. Research supported by the Fonds National de la Recherche Scientif

Computer Science

Sound

15

Atmospheric Composition, Auroral Zones, Gas Transport, Meridional Flow, Nitrogen Atoms, Thermosphere, Atmospheric Models, Auroral Ionization, Emission Spectra, Energy Levels, Explorer 55 Satellite, Light Emission, Nitric Oxide, Time Dependence, Two Dimensional Models

Scientific paper

A time-dependent, two-dimensional model is developed for describing the meridional circulation of thermospheric odd nitrogen species produced in the auroral zone. The model is based on a previous model by Roble and Gary (1979) extended to upper altitude transport of the nitrogen species. Assumptions made include the existence of a steady neutral wind flowing from low to high latitudes, and an initial background due to scattered Lyman-beta and nightglow emissions. The aurora is also assumed as steady, along with a constant ion production. Predictions made using the model are compared with observations with the Atmosphere Explorer C spacecraft and rocket sounding measurements of the 5200 A distribution near the day-side polar cusp. The model requires thermospheric winds of 100-200 m/sec, flowing from day to nightside. Convective velocities near 1000 m/sec were detected by the Explorer spacecraft, as well as a day-to-nightside flow at the cusp.

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