@Article{PaulaJona:2015:LoScWe,
author = "Paula, Eurico Rodrigues de and Jonah, O. F.",
affiliation = "{Instituto Nacional de Pesquisas Espaciais (INPE)}",
title = "Low-latitude scintillation weakening during sudden stratospheric
warming events",
journal = "Journal of Geophysical Research",
year = "2015",
volume = "120",
keywords = "Ionospheric scintillation, lunar tide effects over scintillation,
vertical plasma drift, thermospheric wind.",
abstract = "Global Positioning System (GPS) L1-frequency (1.575 GHz) amplitude
scintillations at S{\~a}o Jos{\'e} dos Campos (23.1°S, 45.8°W,
dip latitude 17.3°S), located under the southern crest of the
equatorial ionization anomaly, are analyzed during the Northern
Hemisphere winter sudden stratospheric warming (SSW) events of
2001/2002, 2002/2003, and 2012/2013. The events occurred during a
period when moderate to strong scintillations are normally
observed in the Brazilian longitude sector. The selected SSW
events were of moderate and major categories and under low Kp
conditions. The most important result of the current study is the
long-lasting (many weeks) weakening of scintillation amplitudes at
this low-latitude station, compared to their pre-SSW periods.
Ionosonde-derived evening vertical plasma drifts and meridional
neutral wind effects inferred from total electron content
measurements are consistent with the observed weakening of GPS
scintillations during these SSW events. This work provides strong
evidence of SSW effects on ionospheric scintillations and the
potential consequences of such SSW events on Global Navigation
Satellite System-based applications.",
doi = "10.1002/2014JA020731",
url = "http://dx.doi.org/10.1002/2014JA020731",
issn = "0148-0227 and 2156-2202",
label = "self-archiving-INPE-MCTI-GOV-BR",
language = "en",
urlaccessdate = "27 abr. 2024"
}