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		<doi>10.1002/2014JA020731</doi>
		<issn>0148-0227</issn>
		<issn>2156-2202</issn>
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		<citationkey>PaulaJona:2015:LoScWe</citationkey>
		<title>Low-latitude scintillation weakening during sudden stratospheric warming events</title>
		<year>2015</year>
		<typeofwork>journal article</typeofwork>
		<secondarytype>PRE PI</secondarytype>
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		<author>Paula, Eurico Rodrigues de,</author>
		<author>Jonah, O. F.,</author>
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		<group>DAE-CEA-INPE-MCTI-GOV-BR</group>
		<affiliation>Instituto Nacional de Pesquisas Espaciais (INPE)</affiliation>
		<electronicmailaddress>eurico@dae.inpe.br</electronicmailaddress>
		<e-mailaddress>olusegun.jonah@inpe.br</e-mailaddress>
		<journal>Journal of Geophysical Research</journal>
		<volume>120</volume>
		<secondarymark>A1_INTERDISCIPLINAR A1_GEOGRAFIA A1_GEOCIÊNCIAS A1_ENGENHARIAS_III A1_CIÊNCIAS_AMBIENTAIS A1_CIÊNCIAS_AGRÁRIAS_I A2_QUÍMICA A2_ENGENHARIAS_IV A2_ENGENHARIAS_II A2_ENGENHARIAS_I A2_BIODIVERSIDADE B1_MATERIAIS B1_MATEMÁTICA_/_PROBABILIDADE_E_ESTATÍSTICA B1_CIÊNCIAS_BIOLÓGICAS_I B1_CIÊNCIA_DA_COMPUTAÇÃO B1_ASTRONOMIA_/_FÍSICA B2_PLANEJAMENTO_URBANO_E_REGIONAL_/_DEMOGRAFIA</secondarymark>
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		<contenttype>External Contribution</contenttype>
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		<keywords>Ionospheric scintillation, lunar tide effects over scintillation, vertical plasma drift, thermospheric wind.</keywords>
		<abstract>Global Positioning System (GPS) L1-frequency (1.575 GHz) amplitude scintillations at São José 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.</abstract>
		<area>CEA</area>
		<language>en</language>
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