Impact of disturbance electric fields in the evening on prereversal vertical drift and spread F developments in the equatorial ionosphere
Equatorial plasma bubble/spread F irregularity occurrence can present large variability depending upon the intensity of the evening prereversal enhancement in the zonal electric field (PRE), that is, the F region vertical plasma drift, which basically drives the post-sunset irregularity developm...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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Copernicus Publications
2018-04-01
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| Series: | Annales Geophysicae |
| Online Access: | https://www.ann-geophys.net/36/609/2018/angeo-36-609-2018.pdf |
| _version_ | 1828176787224395776 |
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| author | M. A. Abdu M. A. Abdu P. A. B. Nogueira A. M. Santos J. R. de Souza I. S. Batista J. H. A. Sobral |
| author_facet | M. A. Abdu M. A. Abdu P. A. B. Nogueira A. M. Santos J. R. de Souza I. S. Batista J. H. A. Sobral |
| author_sort | M. A. Abdu |
| collection | DOAJ |
| description | Equatorial plasma bubble/spread F irregularity occurrence can present large
variability depending upon the intensity of the evening prereversal
enhancement in the zonal electric field (PRE), that is, the F region
vertical plasma drift, which basically drives the post-sunset irregularity
development. Forcing from magnetospheric disturbances is an important source
of modification and variability in the PRE vertical drift and of the
associated bubble development. Although the roles of magnetospheric
disturbance time penetration electric fields in the bubble irregularity
development have been studied in the literature, many details regarding the
nature of the interaction between the penetration electric fields and the
PRE vertical drift still lack our understanding. In this paper we have
analyzed data on F layer heights and vertical drifts obtained from
digisondes operated in Brazil to investigate the connection between magnetic
disturbances occurring during and preceding sunset and the consequent
variabilities in the PRE vertical drift and associated equatorial spread F (ESF) development. The
impact of the prompt penetration under-shielding eastward electric field and
that of the over-shielding, and disturbance dynamo, westward electric field
on the evolution of the evening PRE vertical drift and thereby on the ESF
development are briefly examined. |
| first_indexed | 2024-04-12T04:49:24Z |
| format | Article |
| id | doaj.art-d304c676822c4e63aadd63c6e3007276 |
| institution | Directory Open Access Journal |
| issn | 0992-7689 1432-0576 |
| language | English |
| last_indexed | 2024-04-12T04:49:24Z |
| publishDate | 2018-04-01 |
| publisher | Copernicus Publications |
| record_format | Article |
| series | Annales Geophysicae |
| spelling | doaj.art-d304c676822c4e63aadd63c6e30072762022-12-22T03:47:22ZengCopernicus PublicationsAnnales Geophysicae0992-76891432-05762018-04-013660962010.5194/angeo-36-609-2018Impact of disturbance electric fields in the evening on prereversal vertical drift and spread F developments in the equatorial ionosphereM. A. Abdu0M. A. Abdu1P. A. B. Nogueira2A. M. Santos3J. R. de Souza4I. S. Batista5J. H. A. Sobral6Instituto Tecnológico de Aeronáutica (ITA), DCTA, São Jose dos Campos, BrazilDivisão de Aeronomia, Instituto Nacional de Pesquisas Espaciais, São José dos Campos, 12227-010, São Paulo, BrazilDivisão de Aeronomia, Instituto Nacional de Pesquisas Espaciais, São José dos Campos, 12227-010, São Paulo, BrazilDivisão de Aeronomia, Instituto Nacional de Pesquisas Espaciais, São José dos Campos, 12227-010, São Paulo, BrazilDivisão de Aeronomia, Instituto Nacional de Pesquisas Espaciais, São José dos Campos, 12227-010, São Paulo, BrazilDivisão de Aeronomia, Instituto Nacional de Pesquisas Espaciais, São José dos Campos, 12227-010, São Paulo, BrazilDivisão de Aeronomia, Instituto Nacional de Pesquisas Espaciais, São José dos Campos, 12227-010, São Paulo, BrazilEquatorial plasma bubble/spread F irregularity occurrence can present large variability depending upon the intensity of the evening prereversal enhancement in the zonal electric field (PRE), that is, the F region vertical plasma drift, which basically drives the post-sunset irregularity development. Forcing from magnetospheric disturbances is an important source of modification and variability in the PRE vertical drift and of the associated bubble development. Although the roles of magnetospheric disturbance time penetration electric fields in the bubble irregularity development have been studied in the literature, many details regarding the nature of the interaction between the penetration electric fields and the PRE vertical drift still lack our understanding. In this paper we have analyzed data on F layer heights and vertical drifts obtained from digisondes operated in Brazil to investigate the connection between magnetic disturbances occurring during and preceding sunset and the consequent variabilities in the PRE vertical drift and associated equatorial spread F (ESF) development. The impact of the prompt penetration under-shielding eastward electric field and that of the over-shielding, and disturbance dynamo, westward electric field on the evolution of the evening PRE vertical drift and thereby on the ESF development are briefly examined.https://www.ann-geophys.net/36/609/2018/angeo-36-609-2018.pdf |
| spellingShingle | M. A. Abdu M. A. Abdu P. A. B. Nogueira A. M. Santos J. R. de Souza I. S. Batista J. H. A. Sobral Impact of disturbance electric fields in the evening on prereversal vertical drift and spread F developments in the equatorial ionosphere Annales Geophysicae |
| title | Impact of disturbance electric fields in the evening on prereversal vertical drift and spread F developments in the equatorial ionosphere |
| title_full | Impact of disturbance electric fields in the evening on prereversal vertical drift and spread F developments in the equatorial ionosphere |
| title_fullStr | Impact of disturbance electric fields in the evening on prereversal vertical drift and spread F developments in the equatorial ionosphere |
| title_full_unstemmed | Impact of disturbance electric fields in the evening on prereversal vertical drift and spread F developments in the equatorial ionosphere |
| title_short | Impact of disturbance electric fields in the evening on prereversal vertical drift and spread F developments in the equatorial ionosphere |
| title_sort | impact of disturbance electric fields in the evening on prereversal vertical drift and spread f developments in the equatorial ionosphere |
| url | https://www.ann-geophys.net/36/609/2018/angeo-36-609-2018.pdf |
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