dc.contributor.author | Zhang, Shunrong | |
dc.contributor.author | Nishimura, Yukitoshi | |
dc.contributor.author | Erickson, Philip J. | |
dc.contributor.author | Aa, Ercha | |
dc.contributor.author | Kil, Hyosub | |
dc.contributor.author | Deng, Yue | |
dc.contributor.author | Thomas, Evan | |
dc.contributor.author | Rideout, William | |
dc.contributor.author | Coster, Anthea J. | |
dc.contributor.author | Kerr, Robert | |
dc.contributor.author | Vierinen, Juha | |
dc.date.accessioned | 2023-01-03T07:39:39Z | |
dc.date.available | 2023-01-03T07:39:39Z | |
dc.date.issued | 2022-08-08 | |
dc.description.abstract | This study provides first storm time observations of the westward-propagating medium-scale
traveling ionospheric disturbances (MSTIDs), particularly, associated with characteristic subauroral storm time
features, storm-enhanced density (SED), subauroral polarization stream (SAPS), and enhanced thermospheric
westward winds over the continental US. In the four recent (2017–2019) geomagnetic storm cases examined
in this study (i.e., 2018-08-25/26, 2017-09-07/08, 2017-05-27/28, and 2016-02-02/03 with minimum SYM-H
index −206, −146, −142, and −58 nT, respectively), MSTIDs were observed from dusk-to-midnight local
times predominately during the intervals of interplanetary magnetic field (IMF) Bz stably southward. Multiple
wavefronts of the TIDs were elongated NW-SE, 2°–3° longitude apart, and southwestward propagated at
a range of zonal phase speeds between 100 and 300 m/s. These TIDs initiated in the northeastern US and
intensified or developed in the central US with either the coincident SED structure (especially the SED basis
region) or concurrent small electron density patches adjacent to the SED. Observations also indicate coincident
intense storm time electric fields associated with the magnetosphere–ionosphere–thermosphere coupling
electrodynamics at subauroral latitudes (such as SAPS) as well as enhanced thermospheric westward winds.
We speculate that these electric fields trigger plasma instability (with large growth rates) and MSTIDs. These
electrified MSTIDs propagated westward along with the background westward ion flow which resulted from
the disturbance westward wind dynamo and/or SAPS. | en_US |
dc.identifier.citation | Zhang S, Nishimura Y, Erickson PJ, Aa E, Kil, Deng Y, Thomas E, Rideout W, Coster AJ, Kerr, Vierinen J. Traveling Ionospheric Disturbances in the Vicinity of Storm-Enhanced Density at Midlatitudes. Journal of Geophysical Research (JGR): Space Physics. 2022;127(8) | en_US |
dc.identifier.cristinID | FRIDAID 2067537 | |
dc.identifier.doi | 10.1029/2022JA030429 | |
dc.identifier.issn | 2169-9380 | |
dc.identifier.issn | 2169-9402 | |
dc.identifier.uri | https://hdl.handle.net/10037/27986 | |
dc.language.iso | eng | en_US |
dc.publisher | Wiley | en_US |
dc.relation.journal | Journal of Geophysical Research (JGR): Space Physics | |
dc.rights.accessRights | openAccess | en_US |
dc.rights.holder | Copyright 2022 The Author(s) | en_US |
dc.rights.uri | https://creativecommons.org/licenses/by-nc-nd/4.0 | en_US |
dc.rights | Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0) | en_US |
dc.title | Traveling Ionospheric Disturbances in the Vicinity of Storm-Enhanced Density at Midlatitudes | en_US |
dc.type.version | publishedVersion | en_US |
dc.type | Journal article | en_US |
dc.type | Tidsskriftartikkel | en_US |
dc.type | Peer reviewed | en_US |