Global‐Scale Observations of the Equatorial Ionization Anomaly
Abstract The National Aeronautics and Space Administration Global‐scale Observations of the Limb and Disk ultraviolet spectrograph has been imaging the equatorial ionization anomaly (EIA), regions of the ionosphere with enhanced electron density north and south of the magnetic equator, since October...
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| Main Authors: | , , , , , , , |
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| Format: | Article |
| Language: | English |
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Wiley
2019-08-01
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| Series: | Geophysical Research Letters |
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| Online Access: | https://doi.org/10.1029/2019GL084199 |
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| author | R. W. Eastes S. C. Solomon R. E. Daniell D. N. Anderson A. G. Burns S. L. England C. R. Martinis W. E. McClintock |
| author_facet | R. W. Eastes S. C. Solomon R. E. Daniell D. N. Anderson A. G. Burns S. L. England C. R. Martinis W. E. McClintock |
| author_sort | R. W. Eastes |
| collection | DOAJ |
| description | Abstract The National Aeronautics and Space Administration Global‐scale Observations of the Limb and Disk ultraviolet spectrograph has been imaging the equatorial ionization anomaly (EIA), regions of the ionosphere with enhanced electron density north and south of the magnetic equator, since October 2018. The initial 3 months of observations was during solar minimum conditions, and they included observations in December solstice of unanticipated variability and depleted regions. Depletions are seen on most nights, in contrast to expectations from previous space‐based observations. The variety of scales and morphologies also pose challenges to understanding of the EIA. Abrupt changes in the EIA location, which could be related to in situ measurements of large‐scale depletion regions, are observed on some nights. Such synoptic‐scale disruptions have not been previously identified. |
| format | Article |
| id | doaj-art-b754bdd251d143908cc6f00b5340b995 |
| institution | OA Journals |
| issn | 0094-8276 1944-8007 |
| language | English |
| publishDate | 2019-08-01 |
| publisher | Wiley |
| record_format | Article |
| series | Geophysical Research Letters |
| spelling | doaj-art-b754bdd251d143908cc6f00b5340b9952025-08-20T02:24:35ZengWileyGeophysical Research Letters0094-82761944-80072019-08-0146169318932610.1029/2019GL084199Global‐Scale Observations of the Equatorial Ionization AnomalyR. W. Eastes0S. C. Solomon1R. E. Daniell2D. N. Anderson3A. G. Burns4S. L. England5C. R. Martinis6W. E. McClintock7Laboratory for Atmospheric and Space Physics University of Colorado Boulder Boulder CO USAHigh Altitude Observatory National Center for Atmospheric Research Boulder CO USAIonospheric Physics Stoughton MA USANOAA‐SEC and CIRES University of Colorado Boulder Boulder CO USAHigh Altitude Observatory National Center for Atmospheric Research Boulder CO USAAerospace and Ocean Engineering Virginia Polytechnic Institute and State University Blacksburg VA USACenter for Space Physics Boston University Boston MA USALaboratory for Atmospheric and Space Physics University of Colorado Boulder Boulder CO USAAbstract The National Aeronautics and Space Administration Global‐scale Observations of the Limb and Disk ultraviolet spectrograph has been imaging the equatorial ionization anomaly (EIA), regions of the ionosphere with enhanced electron density north and south of the magnetic equator, since October 2018. The initial 3 months of observations was during solar minimum conditions, and they included observations in December solstice of unanticipated variability and depleted regions. Depletions are seen on most nights, in contrast to expectations from previous space‐based observations. The variety of scales and morphologies also pose challenges to understanding of the EIA. Abrupt changes in the EIA location, which could be related to in situ measurements of large‐scale depletion regions, are observed on some nights. Such synoptic‐scale disruptions have not been previously identified.https://doi.org/10.1029/2019GL084199equatorial ionosphereionospheric irregularitiesionospheric dynamicsionospheric stormsforecastingairglow and aurora |
| spellingShingle | R. W. Eastes S. C. Solomon R. E. Daniell D. N. Anderson A. G. Burns S. L. England C. R. Martinis W. E. McClintock Global‐Scale Observations of the Equatorial Ionization Anomaly Geophysical Research Letters equatorial ionosphere ionospheric irregularities ionospheric dynamics ionospheric storms forecasting airglow and aurora |
| title | Global‐Scale Observations of the Equatorial Ionization Anomaly |
| title_full | Global‐Scale Observations of the Equatorial Ionization Anomaly |
| title_fullStr | Global‐Scale Observations of the Equatorial Ionization Anomaly |
| title_full_unstemmed | Global‐Scale Observations of the Equatorial Ionization Anomaly |
| title_short | Global‐Scale Observations of the Equatorial Ionization Anomaly |
| title_sort | global scale observations of the equatorial ionization anomaly |
| topic | equatorial ionosphere ionospheric irregularities ionospheric dynamics ionospheric storms forecasting airglow and aurora |
| url | https://doi.org/10.1029/2019GL084199 |
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