Statistical analysis on the ionospheric response over South American mid- and near high-latitudes during 70 intense geomagnetic storms occurred in the period of two decades
Tipo
Artigo
Data de publicação
2023
Periódico
Journal of Atmospheric and Solar-Terrestrial Physics
Citações (Scopus)
8
Autores
de Abreu A.J.
Correia E.
de Jesus R.
Venkatesh K.
Macho E.P.
Roberto M.
Fagundes P.R.
Gende M.
Correia E.
de Jesus R.
Venkatesh K.
Macho E.P.
Roberto M.
Fagundes P.R.
Gende M.
Orientador
Título da Revista
ISSN da Revista
Título de Volume
Membros da banca
Programa
Resumo
© 2023 Elsevier LtdThe first-time statistical response of the positive and negative ionospheric storms phases using Vertical Total Electron Content (VTEC) measurements during 70 geomagnetic storms at near high- and mid-latitudes regions in the Antarctic and Argentine/Chilean sectors in the Southern hemisphere are investigated. The study covers the years between 1999 and 2018 of solar cycles 23 and 24, using the Dst ≤ −100 nT as a criterion for all 70 storms selected. Significant features of solar cycle, seasonal and local time of ionospheric storms are showed. Our results indicate that the occurrence of geomagnetic storms follows a pattern of solar activity dependence, and also indicate a predominance of positive and positive-negative phases during autumn, winter, and spring at mid-latitudes and winter at near high-latitudes. Negative and negative-positive phases occur during all seasons at near high- and mid-latitudes. In addition, positive phases occur more frequently during the daytime while the negative phases occur predominantly in nighttime. There is also a predominance of positive and positive-negative phases simultaneously at near high- and mid-latitudes in the Antarctic and Argentine/Chilean sectors. The percentages of occurrence of positive and positive-negative phases are of 50% and 19%, respectively, at mid-latitude and 60% and 22%, respectively, at near high-latitudes. Negative and negative-positive phases are below 9% at both latitudes.
Descrição
Palavras-chave
Assuntos Scopus
Antarctic sector , Geomagnetic storm , GPS TEC , Gps-tec , High Latitudes , Ionospheric storm , Midlatitudes , Negative phase , Positive/negative , Solar cycle