Behavior of foF2 and hmF2 after sunset

Details Behavior of foF2 and hmF2 after sunset Behavior of foF2 and hmF2 after sunset

Dec 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010ge%26ae..50..796d&link_type=abstract

Geomagnetism and Aeronomy, Volume 50, Issue 6, pp.796-803

Physics

1

Scientific paper

The time behavior of the foF2 and hmF2 values at the time moment T(ss + 2 h) 2 h after sunset is considered. It is assumed that at this moment, the horizontal winds in the thermosphere in the strongest way influence hmF2 and, therefore, foF2. It is found that a fairly well pronounced and statistically significant change (trend) is observed for the foF2(ss + 2)/ foF2(14) ratio, the sign of the change being different for different stations and even different seasons at the same station. A similar picture is obtained for the value of hmF2(ss + 2). It is shown that a positive correlation between the trends of these two values is observed. This confirms the initial concept of the paper that the foF2 and hmF2 trends are caused by long-term trends in the thermospheric dynamics.

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