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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Impact of disturbance electric fields in the evening on prereversal vertical drift and spread F developments in the equatorial ionosphere

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Author(s):
Abdu, Mangalathayil A. [1, 2] ; Nogueira, Paulo A. B. [1] ; Santos, Angela M. [1] ; de Souza, Jonas R. [1] ; Batista, Inez S. [1] ; Sobral, Jose H. A. [1]
Total Authors: 6
Affiliation:
[1] Inst Nacl Pesquisas Espaciais, Div Aeron, BR-12227010 Sao Jose Dos Campos, SP - Brazil
[2] ITA, DCTA, Sao Jose Dos Campos - Brazil
Total Affiliations: 2
Document type: Journal article
Source: Annales Geophysicae; v. 36, n. 2, p. 609-620, APR 9 2018.
Web of Science Citations: 2
Abstract

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. (AU)

FAPESP's process: 15/25357-4 - Climatology of Intermediate Layers on the Equatorial and Low Latitudes Regions over Brazilian sector
Grantee:Angela Machado dos Santos Valentim
Support Opportunities: Scholarships in Brazil - Post-Doctoral