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dc.contributor.authorZhang, Shunrong
dc.contributor.authorNishimura, Yukitoshi
dc.contributor.authorErickson, Philip J.
dc.contributor.authorAa, Ercha
dc.contributor.authorKil, Hyosub
dc.contributor.authorDeng, Yue
dc.contributor.authorThomas, Evan
dc.contributor.authorRideout, William
dc.contributor.authorCoster, Anthea J.
dc.contributor.authorKerr, Robert
dc.contributor.authorVierinen, Juha
dc.date.accessioned2023-01-03T07:39:39Z
dc.date.available2023-01-03T07:39:39Z
dc.date.issued2022-08-08
dc.description.abstractThis 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.citationZhang 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.cristinIDFRIDAID 2067537
dc.identifier.doi10.1029/2022JA030429
dc.identifier.issn2169-9380
dc.identifier.issn2169-9402
dc.identifier.urihttps://hdl.handle.net/10037/27986
dc.language.isoengen_US
dc.publisherWileyen_US
dc.relation.journalJournal of Geophysical Research (JGR): Space Physics
dc.rights.accessRightsopenAccessen_US
dc.rights.holderCopyright 2022 The Author(s)en_US
dc.rights.urihttps://creativecommons.org/licenses/by-nc-nd/4.0en_US
dc.rightsAttribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0)en_US
dc.titleTraveling Ionospheric Disturbances in the Vicinity of Storm-Enhanced Density at Midlatitudesen_US
dc.type.versionpublishedVersionen_US
dc.typeJournal articleen_US
dc.typeTidsskriftartikkelen_US
dc.typePeer revieweden_US


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Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0)
Med mindre det står noe annet, er denne innførselens lisens beskrevet som Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0)