scholarly journals Variabilities of Low‐Latitude Migrating and Nonmigrating Tides in GPS‐TEC and TIMED‐SABER Temperature During the Sudden Stratospheric Warming Event of 2013

2017 ◽  
Vol 122 (10) ◽  
pp. 10,748-10,761 ◽  
Author(s):  
S. Sridharan
Keyword(s):  
Stratospheric Warming ◽  
Sudden Stratospheric Warming ◽  
Low Latitude ◽  
Gps Tec ◽  
Nonmigrating Tides

scholarly journals Identification of the mechanisms responsible for anomalies in the tropical lower thermosphere/ionosphere caused by the January 2009 sudden stratospheric warming

2019 ◽  
Vol 9 ◽  
pp. A39 ◽  
Author(s):  
Maxim V. Klimenko ◽  
Vladimir V. Klimenko ◽  
Fedor S. Bessarab ◽  
Timofei V. Sukhodolov ◽  
Pavel A. Vasilev ◽  
...  
Keyword(s):  
Electric Field ◽  
Phase Change ◽  
Lower Thermosphere ◽  
Upper Atmosphere ◽  
Electron Content ◽  
Stratospheric Warming ◽  
Sudden Stratospheric Warming ◽  
Low Latitude ◽  
Plasma Drift ◽  
Solar Tide

We apply the Entire Atmosphere GLobal (EAGLE) model to investigate the upper atmosphere response to the January 2009 sudden stratospheric warming (SSW) event. The model successfully reproduces neutral temperature and total electron content (TEC) observations. Using both model and observational data, we identify a cooling in the tropical lower thermosphere caused by the SSW. This cooling affects the zonal electric field close to the equator, leading to an enhanced vertical plasma drift. We demonstrate that along with a SSW-related wind disturbance, which is the main source to form a dynamo electric field in the ionosphere, perturbations of the ionospheric conductivity also make a significant contribution to the formation of the electric field response to SSW. The post-sunset TEC enhancement and pre-sunrise electron content reduction are revealed as a response to the 2009 SSW. We show that at post-sunset hours the SSW affects low-latitude TEC via a disturbance of the meridional electric field. We also show that the phase change of the semidiurnal migrating solar tide (SW2) in the neutral wind caused by the 2009 SSW at the altitude of the dynamo electric field generation has a crucial importance for the SW2 phase change in the zonal electric field. Such changes lead to the appearance of anomalous diurnal variability of the equatorial electromagnetic plasma drift and subsequent low-latitudinal TEC disturbances in agreement with available observations. Plain Language Summary – Entire Atmosphere GLobal model (EAGLE) interactively calculates the troposphere, stratosphere, mesosphere, thermosphere, and plasmasphere–ionosphere system states and their response to various natural and anthropogenic forcing. In this paper, we study the upper atmosphere response to the major sudden stratospheric warming that occurred in January 2009. Our results agree well with the observed evolution of the neutral temperature in the upper atmosphere and with low-latitude ionospheric disturbances over America. For the first time, we identify an SSW-related cooling in the tropical lower thermosphere that, in turn, could provide additional information for understanding the mechanisms for the generation of electric field disturbances observed at low latitudes. We show that the SSW-related vertical electromagnetic drift due to electric field disturbances is a key mechanism for interpretation of an observed anomalous diurnal development of the equatorial ionization anomaly during the 2009 SSW event. We demonstrate that the link between thermospheric winds and the ionospheric dynamo electric field during the SSW is attained through the modulation of the semidiurnal migrating solar tide.

scholarly journals Longitudinally Dependent Low‐Latitude Ionospheric Disturbances Linked to the Antarctic Sudden Stratospheric Warming of September 2019

2020 ◽  
Vol 125 (8) ◽  
Author(s):  
L. P. Goncharenko ◽  
V. L. Harvey ◽  
K. R. Greer ◽  
S.‐R. Zhang ◽  
A. J. Coster
Keyword(s):  
Ionospheric Disturbances ◽  
Stratospheric Warming ◽  
Sudden Stratospheric Warming ◽  
Low Latitude ◽  
The Antarctic

Low-latitude mesospheric signatures observed during the 2017 sudden stratospheric warming using the fuke meteor radar and ERA-5

2020 ◽  
Vol 207 ◽  
pp. 105352
Author(s):  
S. Eswaraiah ◽  
Kondapalli Niranjan Kumar ◽  
Yong Ha Kim ◽  
G. Venkata Chalapathi ◽  
Wonseok Lee ◽  
...  
Keyword(s):  
Stratospheric Warming ◽  
Meteor Radar ◽  
Sudden Stratospheric Warming ◽  
Low Latitude

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 Longitudinally-Dependent Low-Latitude Ionospheric Disturbances Linked to the Antarctic Sudden Stratospheric Warming of September 2019

2020 ◽  
Author(s):  
Larisa P. Goncharenko ◽  
V Lynn Harvey ◽  
Katelynn R Greer ◽  
Shun-Rong Zhang ◽  
Anthea J Coster
Keyword(s):  
Ionospheric Disturbances ◽  
Stratospheric Warming ◽  
Sudden Stratospheric Warming ◽  
Low Latitude ◽  
The Antarctic

scholarly journals Nonmigrating tidal activity related to the sudden stratospheric warming in the Arctic winter of 2003/2004

2009 ◽  
Vol 27 (3) ◽  
pp. 975-987 ◽  
Author(s):  
D. Pancheva ◽  
P. Mukhtarov ◽  
B. Andonov
Keyword(s):  
Middle Atmosphere ◽  
Detailed Comparison ◽  
The Arctic ◽  
Stratospheric Warming ◽  
Sudden Stratospheric Warming ◽  
Double Peak ◽  
Zonal Wavenumber ◽  
Nonmigrating Tides ◽  
Tide Interaction ◽  
Diurnal Tides

Abstract. This paper is focused on the nonmigrating tidal activity seen in the SABER/TIMED temperatures that is related to the major sudden stratospheric warming (SSW) taking place in the Arctic winter of 2003/2004. The emphasis is on the nonmigrating diurnal tides observed in the stratosphere and lower mesosphere which is usually accepted to be insignificant in comparison with that in the upper mesosphere and thermosphere. By using different independent spectral methods we found a significant amplification in December–January of the following nonmigrating 24-h tides: zonally symmetric (s=0), eastward propagating with zonal wavenumber 1 (E1), and westward propagating with zonal wavenumbers 2 and 3 (W2 and W3) tides. It has been found that the double peak nonmigrating tidal amplifications located in the stratosphere (~40 km) and in the lower mesosphere (~70 km) are a consequence of the maintained hydrostatic relation. By detailed comparison of the evolution and spatial structure of the nonmigrating diurnal tides with those of the migrating diurnal tide and stationary planetary waves (SPWs) evidence for a SPW-migrating tide interaction as a source of nonmigrating tides has been presented. Therefore, the nonmigrating 24-h tides turn out to be an important component of the middle atmosphere dynamics during the major SSW in the Arctic winter of 2003/2004.

Dynamical response of low-latitude middle atmosphere to major sudden stratospheric warming events

2009 ◽  
Vol 71 (8-9) ◽  
pp. 857-865 ◽  
Author(s):  
S. Sathishkumar ◽  
S. Sridharan ◽  
Ch. Jacobi
Keyword(s):  
Middle Atmosphere ◽  
Dynamical Response ◽  
Stratospheric Warming ◽  
Sudden Stratospheric Warming ◽  
Low Latitude
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