Plasma Dynamics Associated with Equatorial Ionospheric Irregularities

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dc.contributor.ISNI0000 0000 3175 0999 (Heelis, RA)
dc.contributor.ORCID0000-0002-5543-5357 (Heelis, RA)
dc.contributor.authorSmith, Jonathon Matthew
dc.contributor.authorHeelis, Roderick A.
dc.contributor.utdAuthorSmith, Jonathon Matthew
dc.contributor.utdAuthorHeelis, Roderick A.
dc.date.accessioned2019-09-27T16:11:53Z
dc.date.available2019-09-27T16:11:53Z
dc.date.created2018-08-17
dc.description.abstractThe Communication/Navigation Outage Forecasting System satellite was operational from 2008, a period of deep solar minimum, to 2015, a period of moderate solar conditions. The behavior of the vertical plasma drift and the distribution of plasma depletions during the deep solar minimum of 2009 deviated substantially from the behavior that was observed during the solar moderate conditions encountered by the Communication/Navigation Outage Forecasting System satellite in 2014, which are typical of previous observations. Presented here are observations of the vertical drift of plasma depletions and the background plasma in which they are embedded. We find that depletions detected at local times after 2100 hr during solar minimum are typically found in background drifts that are weakly downward compared to the strongly downward background drifts observed during moderate solar activity levels. Additionally, at solar minimum, the drift within the depletions is upward with respect to the background as compared with observations at the same local times during solar moderate conditions for which the depleted plasma more nearly drifts with the background. We note that weak background plasma drifts observed throughout the night during solar minimum promote the continued growth of depletions that may evolve more slowly or be continuously generated to appear in the topside in the postmidnight hours. ©2018. American Geophysical Union. All Rights Reserved.
dc.description.departmentSchool of Natural Sciences and Mathematics
dc.description.departmentWilliam B. Hanson Center for Space Sciences
dc.description.sponsorshipNASA grant NNX15AT31G.
dc.identifier.bibliographicCitationSmith, J. M., and R. A. Heelis. 2018. "Plasma Dynamics Associated With Equatorial Ionospheric Irregularities." Geophysical Research Letters 45(16): 7927-7932, doi: 10.1029/2018GL078560
dc.identifier.issn0094-8276
dc.identifier.issue16
dc.identifier.urihttps://hdl.handle.net/10735.1/6923
dc.identifier.volume45
dc.language.isoen
dc.publisherBlackwell Publishing Ltd
dc.relation.urihttp://dx.doi.org/10.1029/2018GL078560
dc.rights©2018 American Geophysical Union. All Rights Reserved.
dc.source.journalGeophysical Research Letters
dc.subjectIonosphere
dc.subjectPlasma dynamics
dc.subjectPlasma diagnostics--Mathematical models
dc.subjectSolar energy
dc.subjectSolar activity
dc.titlePlasma Dynamics Associated with Equatorial Ionospheric Irregularities
dc.type.genrearticle

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