Behavior of foF2 and hmF2 after sunset

被引：8
作者：
Danilov, A. D. [1 ]
Vanina-Dart, L. B. [2 ]
机构：
[1] Moscow Appl Geophys Inst, Moscow 129128, Russia
[2] Russian Acad Sci, Inst Space Res, Moscow 117810, Russia
来源：
GEOMAGNETISM AND AERONOMY | 2010年 / 50卷 / 06期
关键词：
LONG-TERM TRENDS; THERMOSPHERIC DYNAMICS; UPPER-ATMOSPHERE; DAYTIME; VALUES; RATIO; IONOSPHERE; NIGHTTIME; LAYER; TIME;
D O I：
10.1134/S0016793210060113
中图分类号：
P3 [地球物理学]; P59 [地球化学];
学科分类号：
0708 ; 070902 ;
摘要：
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.
引用
收藏
页码：796 / 803
页数：8
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