Computer Science
Scientific paper
Jan 1997
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997adspr..20.1689r&link_type=abstract
Advances in Space Research, Volume 20, Issue 9, p. 1689-1692.
Computer Science
7
Scientific paper
The F2-layer response to geomagnetic activity is studied using the daily mean and local-time variations of the (disturbed/quiet) ratio of the peak electron density NmF2. Data for 53 stations are binned by local time, season, and geomagnetic activity. The mean level has a well-defined variation with latitude, attributed to neutral composition changes caused by a global-scale storm circulation. There are systematic differences in the local-time average of the (disturbed/quiet) ratio of NmF2 between three solar cycles, which may indicate long-term changes in thermospheric composition that possibly arise from different levels of solar activity in the three cycles. Comparison with storm simulations using a coupled thermosphere-ionosphere-plasmasphere model reinforce the conclusion that the principal F2-layer storm effects are due to composition changes.
Field P. R.
Rishbeth Henry
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