@Article{Romero-HernandezDJEPNRRLASGTP:2020:NiIoTE,
author = "Romero-Hernandez, Esmeralda and Denardini, Clezio Marcos and
Jonah, Olusegun F. and Essien, Patrick and Pican{\c{c}}o, Giorgio
Arlan da Silva and Nogueira, P. A. B. and Rodriguez-Martinez,
Mario and Resende, Laysa Cristina Ara{\'u}jo and Luz, V. de la
and Agular-Rodriguez, E. and Sergeeva, Maria and Gonzalez-Esparza,
J. Americo and Takahashi, Hisao and Perez-Tijerina, E.",
affiliation = "{Universidad Aut{\'o}noma de Nuevo Le{\'o}n} and {Instituto
Nacional de Pesquisas Espaciais (INPE)} and {Massachusetts
Institute of Technology} and {Instituto Nacional de Pesquisas
Espaciais (INPE)} and {Instituto Nacional de Pesquisas Espaciais
(INPE)} and Instituto Federal de Educa{\c{c}}{\~a}o, Ciencia e
Tecnologia de S{\~a}o Paulo (IFSP) and {Universidad Nacional
Aut{\'o}noma de M{\'e}xico} and {Instituto Nacional de Pesquisas
Espaciais (INPE)} and {Universidad Nacional Aut{\'o}noma de
M{\'e}xico} and {Universidad Nacional Aut{\'o}noma de
M{\'e}xico} and {Universidad Nacional Aut{\'o}noma de
M{\'e}xico} and {Universidad Nacional Aut{\'o}noma de
M{\'e}xico} and {Instituto Nacional de Pesquisas Espaciais
(INPE)}",
title = "Nighttime ionospheric TEC study over Latin America during moderate
and high solar activity",
journal = "Journal of Geophysical Research: Space Physics",
year = "2020",
volume = "125",
number = "10",
pages = "e2020JA028210",
month = "Oct.",
abstract = "The present work is a comprehensive study of the ionospheric
vertical total electron content (vTEC) variations during the
nighttime, based on data collected by ground-based Global
Navigation Satellite System (GNSS) receivers over the Latin
American region. We provide a qualitative and quantitative
analysis of the ionospheric vTEC trend at 21:00, 00:00, and 03:00
local time (LT), during geomagnetically undisturbed days of 2011
(ascending phase) and 2014 (maximum phase), which encompassed (a)
the response to the solar flux variation, (b) the seasonal trend
in different latitudes and longitudes, and (c) the
interhemispheric asymmetry. One significant result of this study
is the development of TEC maps for the Latin American region,
which are used for the monitoring and forecasting of the
ionosphere for space weather purposes. The nighttime vTEC
variations showed a strong latitudinal dependence, especially in
the Northern Hemisphere. For 2011, the semiannual anomaly was
similar to that observed in daytime; however, in 2014, the
receivers at midlatitude presented asymmetric behavior. Similarly,
the nighttime winter anomaly (NWA) was very weak in both years.
The Equatorial Ionospheric Anomaly (EIA) signature was absent from
June to August, a period in which the hemispheric disparity in the
vTEC values became more evident, suggesting a feeble
interhemispheric circulation. The Midlatitude Summer Nighttime
Anomaly (MSNA) was also identified in the Southern Hemisphere,
during January and February of 2011 (moderate solar activity).
Model approximations suggest that the equatorward winds and the
EIA were involved in the formation of the MSNA.",
doi = "10.1029/2020JA028210",
url = "http://dx.doi.org/10.1029/2020JA028210",
issn = "2169-9402",
language = "en",
targetfile = "romero-nightime.pdf",
urlaccessdate = "05 maio 2024"
}