Upper-atmosphere perturbations at subauroral latitudes during an intense geomagnetic storm

Autor: R. G. Ezquer, G. A. Mansilla
Jazyk: English<br />Spanish; Castilian
Rok vydání: 2004
Předmět:
Zdroj: Geofísica Internacional, Vol 43, Iss 1, Pp 23-28 (2004)
Druh dokumentu: article
ISSN: 0016-7169
Popis: Neutral gas density data of molecular nitrogen N2 and atomic oxygen O between 310 km and 330 km altitude as obtained by the Dynamic Explorer 2 satellite and ground-based foF2 data with ionosondes were used to examine the response of the thermosphere-ionosphere system to the intense geomagnetic storm of September 5, 1982. A comparison of simultaneous measurements of gas composition and peak electron density was obtained. Increase of N2 concentration and concurrent decrease of O concentration is observed. The N2 variation is greater than the O variation. Both changes contribute to explain the reduction in ionization density. Delayed increases of ionization are attributed to particle precipitation rather than to ionization transport.
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