Solar activity variations of equivalent winds derived from global ionosonde data
Solar activity variations of equivalent winds derived from global ionosonde data
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根据全球电离探空仪数据得出的等效风的太阳活动变化
DOI:
10.1029/2004ja010574
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发表时间:
2004-12
期刊:
影响因子:
--
通讯作者:
B. Ning
中科院分区:
文献类型:
--
作者:
Libo Liu;X. Luan;W. Wan;J. Lei;B. Ning
equivalentwindsarefoundofnonlinearlydecreaseddiurnalamplitudesinallseasonsatmost stations. This implies that the increase in ion drag more than compensates for pressure gradients and thus restrains the diurnal amplitude at high solar activity. The diurnal phase of the derived equivalent winds generally shifts later at higher solar activity. It is the first time to explicitly report this striking feature that emerged at so many stations. Another pronounced feature is that the diurnal phase has a summer-winter difference. The diurnal phases at most stations in the Northern Hemisphere are later in winter than in summer at higher solar activity. Furthermore, a decrease in the semidiurnal amplitudes of equivalent winds with increasing solar activity is evident in winter over most stations considered and in other seasons at stations with a lower dip, but the decrease trend becomes weak in other seasonsatstationswithalargerdip.However,complicateddependencesonsolaractivitycan be found in the diurnal mean and the semidiurnal phases of equivalent winds at stations considered. INDEX TERMS: 2427 Ionosphere: Ionosphere/atmosphere interactions (0335); 3369 MeteorologyandAtmosphericDynamics:Thermosphericdynamics(0358);3309MeteorologyandAtmospheric Dynamics: Climatology (1620); 2162 Interplanetary Physics: Solar cycle variations (7536); KEYWORDS: ionosphere, climatology, solar activity variation
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DOI:
10.5194/angeo-21-2185-2003
发表时间:
2003-11
期刊:
Ann. Geophys.
影响因子:
--
作者:
L. Liu;X. Luan;W. Wan;B. Ning;J. Lei
通讯作者:
J. Lei
DOI:
10.1016/0045-8732(83)90106-7
发表时间:
1978
期刊:
--
影响因子:
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作者:
K. Rawer;S. Ramakrishnan;D. Bilitza
通讯作者:
K. Rawer;S. Ramakrishnan;D. Bilitza
影响因子:
1.9
作者:
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通讯作者:
X. Luan;Libo Liu;W. Wan;J. Lei;T. Yu
DOI:
10.1016/s0273-1177(03)90468-6
发表时间:
2003
期刊:
Adv. Space Res
影响因子:
--
作者:
Libo Liu;Weixing Wan;Xiaoli Luan;Baiqi Ning;Jiuhou Lei
通讯作者:
Jiuhou Lei
影响因子:
--
作者:
M. A. Biondi;S. Sazykin;B. Fejer;J. Meriwether;C. Fesen
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