Statistical analysis of ionospheric mid-latitude trough over the Northern Hemisphere derived from GPS total electron content data

被引:0
作者
Na Yang
Huijun Le
Libo Liu
机构
[1] Chinese Academy of Sciences,Key Laboratory of Earth and Planetary Physics, Institute of Geology and Geophysics
[2] Chinese Academy of Sciences,Beijing National Observatory of Space Environment, Institute of Geology and Geophysics
[3] University of the Chinese Academy of Sciences,undefined
来源
Earth, Planets and Space | / 67卷
关键词
Ionosphere; Mid-latitude trough; Statistic analysis; Geomagnetic activity variation; Solar activity variation;
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学科分类号
摘要
This study statistically investigated the seasonal variation, magnetic local time (MLT) variation, geomagnetic activity dependence, and solar activity dependence of the mid-latitude trough using GPS total electron content (TEC) data from 2000 to 2014. The daily median Kp index was used to characterize the daily geomagnetic activity level. The results showed that the trough minimum position depended primarily on the geomagnetic activity, MLT, and the season. The trough depth depended primarily on the solar flux index (F107) and, to a lesser degree, on MLT. The trough depth increased as F107 increased and as the incidence angle of solar flux decreased. The trough equatorward half-width decreased as the geomagnetic activity increased. These variations in the GPS-TEC trough minimum position were compared with the variations in the TEC trough derived from the International Reference Ionosphere (IRI)-2007 model. The GPS-TEC trough minimum position changed little with respect to F107, whereas the IRI-TEC trough minimum position showed a strong F107 dependence.
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[1]  
Balan N(1996)Variations of the ionosphere and related solar fluxes during solar cycles 21 and 22 Adv Space Res 18 11-14
[2]  
Bailey GJ(1988)Plasma convection and auroral precipitation processes associated with the main ionospheric trough at high latitudes J Atmos Terr Phys 50 389-404
[3]  
Su YZ(1995)Electrodynamic model for the formation of auroral ionospheric cavities J Geophys Res 100 9683-9696
[4]  
Collis PN(2002)Altitude dependence of middle and low-latitude daytime thermospheric disturbance winds measured by WINDII J Geophys Res 107 1483-7782
[5]  
Häggström I(1983)The fossil theory of nighttime high latitude F region troughs J Geophys Res 88 7769-6693
[6]  
Doe RF(2015)Climatologies of nighttime thermospheric winds and temperatures from Fabry-Perot interferometer measurements: from solar minimum to solar maximum J Geophys Res Space Physics 120 6679-162
[7]  
Vickrey JF(2011)A study on the nighttime midlatitude ionospheric trough J Geophys Res 116 A05315-940
[8]  
Mendillo M(2000)3-D extent of the main ionospheric trough—a case study Adv Pol Up Atm Res 14 157-251
[9]  
Emmert JT(2003)The Southern Hemisphere mid-latitude day-time and nighttime trough at low-sunspot numbers J Atmos Terr Phys 65 917-6230
[10]  
Fejer BG(2003)The dependence of the main ionospheric trough shape on longitude, altitude, season, local time, and solar and magnetic activity Geomagn Aeron 43 239-1055