scholarly journals Ionospheric response to sudden stratospheric warming events at low and high solar activity

2014 ◽  
Vol 119 (9) ◽  
pp. 7858-7869 ◽  
Author(s):  
Tzu-Wei Fang ◽  
Tim Fuller-Rowell ◽  
Houjun Wang ◽  
Rashid Akmaev ◽  
Fei Wu
Keyword(s):  
Solar Activity ◽  
High Solar Activity ◽  
Stratospheric Warming ◽  
Sudden Stratospheric Warming ◽  
Ionospheric Response

Ionospheric Variability: Response to Sudden Stratospheric Warming events during Solar Cycle 24

2021 ◽  
Author(s):  
Sumedha Gupta ◽  
Arun Kumar Upadhayaya ◽  
Devendraa Siingh
Keyword(s):  
Solar Activity ◽  
Solar Cycle ◽  
Electron Content ◽  
Vertical Total Electron Content ◽  
Stratospheric Warming ◽  
Sudden Stratospheric Warming ◽  
Total Electron ◽  
Ionospheric Response ◽  
Solar Cycle 24 ◽  
Cycle 24

<p>With low solar activity and unusual progression, Solar Cycle 24 lasted from December 2008 to December 2019 and is considered to be the weakest cycle in the last 100 years. During such quiet solar background conditions, the wave forcing from lower atmosphere will have a perceivable effect on the ionosphere. This study examines the ionospheric response to meteorological phenomenon of Sudden Stratospheric Warming (SSW) events during Solar Cycle 24 (Arctic winter 2008/09 to 2018/19). Ionospheric response to each of these identified warming periods is quantified by studying ground – based Global Positioning System (GPS) derived vertical Total Electron Content (VTEC) and its deviation from monthly median (ΔVTEC) for four longitudinal chains, selected from worldwide International GNSS service (IGS) stations. Each chain comprises of eight stations, chosen in such a way as to cover varied latitudes both in Northern and Southern Hemispheres. A strong latitude – dependent response of VTEC perturbations is observed after the peak stratospheric temperature anomaly (ΔT<sub>max</sub>). The semidiurnal behaviour of VTEC, with morning increase and afternoon decrease, is mostly observed at near-equatorial stations. This vertical coupling between lower and upper atmosphere during SSW is influenced by prominent 13-14 days periodicities in VTEC observations, along with other periodicities of 7, 5, and 3 days. It is seen that the ionospheric response increases with increase in solar activity. Further, under similar ionizing conditions, quite similar ionospheric response is observed, irrespective of ΔT<sub>max</sub> and type of SSW event being major or minor. However, under similar SSW strength (ΔT<sub>max</sub>), no prominent pattern in ionospheric response is observed. The causative mechanism for the coupling processes in the atmosphere during these SSW events is discussed in detail.</p>

scholarly journals Ionospheric Response to the 2018 Sudden Stratospheric Warming Event at Middle‐ and Low‐Latitude Stations Over China Sector

Space Weather ◽  
2019 ◽  
Vol 17 (8) ◽  
pp. 1230-1240 ◽  
Author(s):  
Guoqi Liu ◽  
Wengeng Huang ◽  
Hua Shen ◽  
Ercha Aa ◽  
Manxia Li ◽  
...  
Keyword(s):  
Stratospheric Warming ◽  
Sudden Stratospheric Warming ◽  
Low Latitude ◽  
Ionospheric Response

scholarly journals Study of the thermospheric and ionospheric response to the 2009 sudden stratospheric warming using TIME‐GCM and GSM TIP models: First results

2015 ◽  
Vol 120 (9) ◽  
pp. 7873-7888 ◽  
Author(s):  
M. V. Klimenko ◽  
V. V. Klimenko ◽  
F. S. Bessarab ◽  
Yu N. Korenkov ◽  
Hanli Liu ◽  
...  
Keyword(s):  
Stratospheric Warming ◽  
Sudden Stratospheric Warming ◽  
Ionospheric Response ◽  
First Results
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