Studies of theEregion neutral wind in the disturbed auroral ionosphere

1995 ◽  
Vol 100 (A8) ◽  
pp. 14717 ◽  
Author(s):  
Satonori Nozawa ◽  
Asgeir Brekke
Keyword(s):  
Neutral Wind ◽  
Auroral Ionosphere

Studies of theEregion neutral wind in the quiet auroral ionosphere

1994 ◽  
Vol 99 (A5) ◽  
pp. 8801 ◽  
Author(s):  
Asgeir Brekke ◽  
Satonori Nozawa ◽  
Trygve Sparr
Keyword(s):  
Neutral Wind ◽  
Auroral Ionosphere

scholarly journals Ion-neutral coupling in the high-latitude F-layer from incoherent scatter and Fabry-Perot interferometer measurements

2000 ◽  
Vol 18 (9) ◽  
pp. 1145-1153 ◽  
Author(s):  
K. Cierpka ◽  
M. J. Kosch ◽  
M. Rietveld ◽  
K. Schlegel ◽  
T. Hagfors
Keyword(s):  
High Latitude ◽  
Frictional Heating ◽  
Neutral Wind ◽  
Auroral Ionosphere ◽  
Quiet Period ◽  
Ion Temperature ◽  
Incoherent Scatter ◽  
F Region ◽  
Fabry Perot ◽  
Energy Sink

Abstract. Since the auroral ionosphere provides an important energy sink for the magnetosphere, ionosphere-thermosphere coupling must be investigated when considering the energy budget of the ionosphere-magnetosphere coupling. We present the first Scandinavian ground-based study of high-latitude F-region ion-neutral frictional heating where ion velocity and temperature are measured by the EISCAT incoherent scatter radar as well as neutral wind and temperature being measured simultaneously by a Fabry-Perot interferometer. A geomagnetically active period (Kp = 7– – 5–) and quiet period (Kp = 0+ – 0) were studied. Neglecting the neutral wind can result in errors of frictional heating estimates of 60% or more in the F-layer. About 96% of the local ion temperature enhancement over the neutral temperature is accounted for by ion-neutral frictional heating.Key words: Ionosphere (auroral ionosphere; ionosphere-atmosphere interactions)

scholarly journals Meridional thermospheric neutral wind at high latitude over a full solar cycle

1998 ◽  
Vol 16 (10) ◽  
pp. 1400-1409 ◽  
Author(s):  
O. Witasse ◽  
J. Lilensten ◽  
C. Lathuillere ◽  
B. Pibaret
Keyword(s):  
Solar Activity ◽  
Solar Cycle ◽  
Universal Time ◽  
Neutral Wind ◽  
High Latitudes ◽  
Auroral Ionosphere ◽  
Neutral Winds ◽  
F Region ◽  
Eiscat Radar ◽  
Thermospheric Dynamics

Abstract. EISCAT radar experiments over a full solar cycle between January 1984 and March 1995 have been used to construct meridional neutral wind patterns in the ionospheric F region. For locally geomagnetically quiet periods the neutral winds have been binned according to season, solar activity, and universal time. The diurnal and seasonal behaviors and the effect of the solar flux are described. An empirical model of the meridional neutral wind for the high latitudes at eight altitudes in the ionospheric F region over a full solar cycle is presented. Results are compared with other recent empirical models.Key words. Auroral ionosphere · Thermospheric dynamics · EISCAT

scholarly journals On the fast movements of the thermosphere: an interpretation

2000 ◽  
Vol 18 (12) ◽  
pp. 1651-1656
Author(s):  
J. Lilensten ◽  
P. O. Amblard
Keyword(s):  
Rotation Velocity ◽  
Atmospheric Composition ◽  
Neutral Wind ◽  
Typical Size ◽  
F Region ◽  
Optical Experiment ◽  
Atmospheric Composition And Structure ◽  
Composition And Structure ◽  
Eiscat Radar

Abstract. We examine the oscillations of the meridional neutral wind in the F region as seen by the EISCAT radar. We propose an interpretation in term of eddies (tourbillons) of typical size of a few tens to a few hundreds of kilometers. The observed rotation velocity is a few hundreds of meters per second. We suggest that the tourbillons are a common feature of thermospheric movements. We propose an optical experiment to check the validity of this assumption.Key words: Atmospheric composition and structure (thermosphere · composition and chemistry) · Ionosphere (ionosphere · atmosphere interactions)

scholarly journals Extremely low equatorial ionospheric density measured by CHAMP due to strong meridional neutral wind

2021 ◽  
Author(s):  
Yaoyu Tian ◽  
Yongqiang Hao ◽  
Quanhan Li ◽  
Donghe Zhang ◽  
Zuo Xiao
Keyword(s):  
Neutral Wind
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