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(Referência obtida automaticamente do Web of Science, por meio da informação sobre o financiamento pela FAPESP e o número do processo correspondente, incluída na publicação pelos autores.)

Observations of nighttime equatorial-upper-E-valley region irregular structures from Sao Luis radar and their occurrence statistics: A manifestation of vertical coupling between E and F regions

Texto completo
Autor(es):
Kherani, E. Alam [1] ; de Paula, E. R. [1] ; Cueva, R. Y. C. [1] ; Camargo, L. A. P. [1]
Número total de Autores: 4
Afiliação do(s) autor(es):
[1] Inst Nacl Pesquisas Espaciais, BR-12201 Sao Jose Dos Campos - Brazil
Número total de Afiliações: 1
Tipo de documento: Artigo Científico
Fonte: JOURNAL OF ATMOSPHERIC AND SOLAR-TERRESTRIAL PHYSICS; v. 75, n. SI, p. 64-70, FEB 2012.
Citações Web of Science: 7
Resumo

Radar observations of nighttime irregular structures in the equatorial upper-E-valley region are presented. These structures are observed strictly during occurrences of an ascending irregular bottomtype or bottomside F layer, during or prior to the appearance of a high-rising F region plume and a momentarily intensification of E-region irregularities. The slope and the altitude coverage of these structures are proportional to the ascending rate of the irregular bottomtype/bottomside F layer and the altitude coverage of the plume respectively. These structures are found to consist of substructures separated in times suggesting the presence of quasi-periodic striations within these irregular structures. On the basis of occurrence statistics during October 2001-December 2008, the occurrence rate of these structures is found to be 3.5%, indicating the nature of rare occurrence of these structures over Soa Luis. Moreover, their occurrence remains confined to the maximum solar-flux period (2001-2003) and to the summer months (October-January). The presence of these structures is a manifestation of the vertical coupling of E and F regions owing to the ambient electric fields of the ionosphere and the fringe-field associated with the F region plume. (C) 2011 Elsevier Ltd. All rights reserved. (AU)

Processo FAPESP: 04/01065-0 - Imageamento das irregularidades ionosféricas por radar VHF
Beneficiário:Eurico Rodrigues de Paula
Linha de fomento: Auxílio à Pesquisa - Regular
Processo FAPESP: 99/00026-0 - Estudos das irregularidades ionosféricas utilizando radar HF/VHF/ de espalhamento coerente
Beneficiário:Eurico Rodrigues de Paula
Linha de fomento: Auxílio à Pesquisa - Regular
Processo FAPESP: 07/00104-0 - Estudo experimental e teórico das irregularidades ionosféricas equatoriais
Beneficiário:Esfhan Alam Kherani
Linha de fomento: Bolsas no Brasil - Pós-Doutorado