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@Article{CandidoBKNBPSC:2018:ReToEl,
               author = "Candido, Cl{\'a}udia Maria Nicoli and Batista, Inez Staciarini 
                         and Klausner, Virginia and Negreti, Patr{\'{\i}}cia Mara de 
                         Siqueira and Becker Guedes, F{\'a}bio and Paula, Eurico Rodrigues 
                         de and Shi, Jiankui and Correia, Em{\'{\i}}lia",
          affiliation = "{Instituto Nacional de Pesquisas Espaciais (INPE)} and {Instituto 
                         Nacional de Pesquisas Espaciais (INPE)} and {} and {Instituto 
                         Nacional de Pesquisas Espaciais (INPE)} and {Instituto Nacional de 
                         Pesquisas Espaciais (INPE)} and {Instituto Nacional de Pesquisas 
                         Espaciais (INPE)} and {Instituto Nacional de Pesquisas Espaciais 
                         (INPE)} and {Instituto Nacional de Pesquisas Espaciais (INPE)}",
                title = "Response of the total electron content at Brazilian low latitudes 
                         to corotating interaction region and high-speed streams during 
                         solar minimum 2008",
              journal = "Earth Planets and Space",
                 year = "2018",
               volume = "70",
                pages = "e104",
                month = "June",
             keywords = "Solar minimum, High-speed streams, Corotating interaction region, 
                         High-intensity long-duration continuous auroral activity, 
                         Equatorial ionization anomaly, Total electron content.",
             abstract = "In this work, we investigate the Brazilian low-latitude 
                         ionospheric response to two corotating interaction regions (CIRs) 
                         and high-speed streams (HSSs) events during the solar minimum of 
                         solar cycle 23, in 2008. The studied intervals are enclosed in the 
                         whole heliospheric interval, studied by other authors, for 
                         distinct longitudinal sectors. CIRs/HSSs are structures commonly 
                         observed during the descending and low solar activity, and they 
                         are related to the occurrence of coronal holes. These events cause 
                         weak-to-moderate recurrent geomagnetic storms characterized by 
                         negative excursions of the interplanetary magnetic field, IMF_Bz, 
                         as well as long-duration auroral activity, considered as a 
                         favorable scenario for continuous prompt penetration 
                         interplanetary electric field (PPEF). In this study, we used the 
                         vertical total electron content (VTEC) calculated from GPS 
                         receivers database from the Brazilian Continuous Monitoring 
                         Network managed by the Brazilian Institute of Geography and 
                         Statistics. Moreover, we analyzed the F-layer peak height, hmF2 
                         and the critical plasma frequency, foF2, taken from a Digisonde 
                         installed at the southern crest of the equatorial ionization 
                         anomaly, in Cachoeira Paulista, CP. It was observed that during 
                         the CIRs/HSSs-driven geomagnetic disturbances VTEC increased more 
                         than 120% over the quiet times averaged values, which is 
                         comparable to intense geomagnetic storms. On the other hand, VTEC 
                         decreases were also observed during the recovery phase of the 
                         storm. Spectral analysis using gapped wavelet technique (GWT) 
                         revealed periodicities of 7, 9, 13.5 days, which are sub-harmonics 
                         of the solar rotation period, similar to 27 days. These periods in 
                         VTEC are closely associated with those observed in solar and 
                         geomagnetic indices such as Vsw, IMF_Bz and AE during CIRs/HSSs 
                         intervals. We discuss PPEF associated to IMF_ Bz reconnection 
                         processes and the auroral activity as the most probable causes for 
                         the VTEC variations. These results can be of interest for studies 
                         related to space weather monitoring, modeling and forecasting, 
                         especially during low solar activity.",
                  doi = "10.1186/s40623-018-0875-8",
                  url = "http://dx.doi.org/10.1186/s40623-018-0875-8",
                 issn = "1880-5981",
             language = "en",
           targetfile = "candido_response.pdf",
        urlaccessdate = "04 dez. 2020"
}


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