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Found 6 entries in the Bibliography.
Showing entries from 1 through 6
Spatial-Temporal Behaviors of Large-Scale Ionospheric Perturbations During Severe Geomagnetic Storms on September 7–8 2017 Using the GNSS, SWARM and TIE-GCM Techniques
Geomagnetic storms on 7–8 September 2017 triggered severe ionospheric disturbances that had a serious effect on satellite navigation and radio communication. Multiple observations derived from Global Navigation Satellite System receivers, Earth s Magnetic Field and Environment Explorers (SWARM) and the Thermosphere-Ionosphere -Electrodynamics General Circulation Model s simulations are utilized to investigate the spatial-temporal ionospheric behaviors under storm conditions. The results indicate that the electron density i ...
Li, Wang; Zhao, Dongsheng; He, Changyong; Hancock, Craig; Shen, Yi; Zhang, Kefei;
Published by: Journal of Geophysical Research: Space Physics Published on:
YEAR: 2022   DOI: 10.1029/2021JA029830
hemispheric asymmetry; ionospheric disturbances; Magnetic storms; thermospheric composition changes; TIE-GCM
Comparison of ionospheric anomalies over African equatorial/low-latitude region with IRI-2016 model predictions during the maximum phase of solar cycle 24
The capability of IRI-2016 in reproducing the hemispheric asymmetry, the winter and semiannual anomalies has been assessed over the equatorial ionization anomaly (EIA) during quiet periods of years 2013–2014. The EIA reconstructed using Total Electron Content (TEC) derived from Global Navigation Satellite System was compared with that computed using IRI-2016 along longitude 25° − 40oE. These were analyzed along with hemispheric changes in the neutral wind derived from the horizontal wind model and the TIMED GUVI columna ...
Amaechi, Paul; Oyeyemi, Elijah; Akala, Andrew; Kaab, Mohamed; Younas, Waqar; Benkhaldoun, Zouhair; Khan, Majid; Mazaudier, Christine-Amory;
Published by: Advances in Space Research Published on: aug
YEAR: 2021   DOI: 10.1016/j.asr.2021.03.040
Equatorial ionization anomaly; hemispheric asymmetry; IRI-2016; Semiannual anomaly; Winter anomaly
Ionospheric response to the 2015 St. Patrick's Day storm: A global multi-instrumental overview
We present the first multi-instrumental results on the ionospheric response to the geomagnetic storm of 17\textendash18 March 2015 (the St. Patrick\textquoterights Day storm) that was up to now the strongest in the 24th solar cycle (minimum SYM-H value of -233 nT). The storm caused complex effects around the globe. The most dramatic positive ionospheric storm occurred at low latitudes in the morning (~100\textendash150\% enhancement) and postsunset (~80\textendash100\% enhancement) sectors. These significant vertical tota ...
Astafyeva, Elvira; Zakharenkova, Irina; Förster, Matthias;
Published by: Journal of Geophysical Research: Space Physics Published on: 10/2015
YEAR: 2015   DOI: 10.1002/2015JA021629
geomagnetic storm; hemispheric asymmetry; Ionosphere; negative storm; positive storm; Swarm mission
Longitudinal variations of the nighttime E layer electron density in the auroral zone
Longitudinal variations of the nighttime E layer electron density (21:00\textendash03:00 magnetic local time) in the auroral zone are investigated, and their sources are discussed in terms of auroral precipitation and solar radiation. The electron density data used in this study are retrieved from Constellation Observing System for Meteorology, Ionosphere, and Climate radio occultation observations during 2006\textendash2009 under quiet geomagnetic activity (Kp <= 3) and solar minimum conditions. The mai ...
Luan, Xiaoli; Wang, Wenbin; Dou, Xiankang; Burns, Alan; Yue, Xinan;
Published by: Journal of Geophysical Research: Space Physics Published on: 01/2015
YEAR: 2015   DOI: 10.1002/2014JA020610
auroral E layer; hemispheric asymmetry; longitudinal variations; Seasonal variations
Solar cycle dependence of the seasonal variation of auroral hemispheric power
Although much has been done on the hemispheric asymmetry (or seasonal variations) of auroral hemispheric power (HP), the dependence of HP hemispheric asymmetry on solar cycle has not yet been studied. We have analyzed data during 1979\textendash2010 and investigated the dependence of HP hemispheric asymmetry/seasonal variation for the whole solar cycle. Here we show that (1) the hemispheric asymmetry of HP is positively correlated to the value of solar F10.7 with some time delay; (2) it is closely related to the coupling ...
Zheng, Ling; Fu, SuiYan; Zong, QuiGang; Parks, George; Wang, Chi; Chen, Xi;
Published by: Chinese Science Bulletin Published on: 02/2013
YEAR: 2013   DOI: 10.1007/s11434-012-5378-6
auroral power; coupling function; hemispheric asymmetry; precipitation; solar cycle
Analyzing the hemispheric asymmetry in the thermospheric density response to geomagnetic storms
The thermospheric densities derived by CHAMP/STAR accelerometer within the time period from 01 May 2001 to 31 December 2007 are utilized to investigate the hemispheric asymmetry in response to strong storm driving conditions. The geomagnetic storms of 03\textendash07 April 2004 are first studied since the storms occurred close to the vernal equinox, allowing the seasonal asymmetry to be eliminated to the greatest extent. The averaged density enhancements in the southern polar region were much larger than that in the north ...
Ercha, A.; Ridley, Aaron; Zhang, Donghe; Xiao, Zuo;
Published by: Journal of Geophysical Research Published on: 08/2012
YEAR: 2012   DOI: 10.1029/2011JA017259
Geomagnetic storms; hemispheric asymmetry; thermospheric density