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Reference TypeJournal Article
Holder Codeisadg {BR SPINPE} ibi 8JMKD3MGPCW/3DT298S
Identifier8JMKD3MGP3W34R/43F8N7B   (restricted access)
Last Update2020: simone
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Citation KeyBravoSepulvedaMFUOVSCMTVMPRLS:2020:CoToEl
TitleFirst report of an eclipse from chilean ionosonde observations: comparison with total electron content estimations and the modeled maximum electron concentration and its height
Access Date2020, Nov. 28
Number of Files1
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Author 1 Bravo Sepulveda, Manuel Alejandro
 2 Martínez Ledesma, Miguel
 3 Foppiano, Alberto J.
 4 Urra, Benjamin
 5 Ovalle, Elias
 6 Villalobos, C.
 7 Souza, Jonas Rodrigues de
 8 Carrasco, Enrique
 9 Muñoz, Pablo R.
10 Tamblay, Luis
11 Vega Jorquera, Pedro
12 Marín, J.
13 Pacheco, R.
14 Rojo, E.
15 Leiva, R.
16 Stepanova, Marina
Resume Identifier 1
ORCID 1 0000-0002-5648-429X
 2 0000-0001-6932-1249
 3 0000-0003-4374-538X
 4 0000-0003-4374-538X
 5 0000-0001-9192-9824
 6 0000-0001-7725-7785
 7 0000-0003-0356-5835
 8 0000-0002-3435-6422
 9 0000-0002-6552-824X
10 0000-0001-6796-3520
14 0000-0002-1053-3375
Group 1
Affiliation 1 Universidad de Concepción
 2 Centro Interuniversitario de Física de la Alta Atmósfera
 3 Universidad de Concepción
 4 Universidad de Concepción
 5 Universidad de Concepción
 6 Centro Interuniversitario de Física de la Alta Atmósfera
 7 Instituto Nacional de Pesquisas Espaciais (INPE)
 8 Universidad de Concepción
 9 Centro Interuniversitario de Física de la Alta Atmósfera
10 Centro Interuniversitario de Física de la Alta Atmósfera
11 Centro Interuniversitario de Física de la Alta Atmósfera
12 Centro Interuniversitario de Física de la Alta Atmósfera
13 Centro Interuniversitario de Física de la Alta Atmósfera
14 Centro Interuniversitario de Física de la Alta Atmósfera
15 Centro Interuniversitario de Física de la Alta Atmósfera
16 Universidad de Santiago de Chile
Author e-Mail Address 1
JournalJournal of Geophysical Research: Space Physics
History2020-10-23 15:24:49 :: simone -> administrator ::
2020-10-23 15:24:50 :: administrator -> simone :: 2020
2020-10-23 15:27:30 :: simone -> administrator :: 2020
2020-10-24 07:47:33 :: administrator -> simone :: 2020
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AbstractThe ionospheric responses to the total solar eclipse on 2 July 2019 over low latitudes in southern South America are presented. Ionosonde observations were used within the totality path at La Serena (LS: 29.9°S, 71.3°W) and at Tucumán (TU: 26.9°S, 65.4°W) and Jicamarca (JI: 12.0°S, 76.8°W), with 85% and 52% obscuration, respectively. Total electron content (TEC) estimations over the South American continent were analyzed. The ionospheric impact of the eclipse was simulated using the Sheffield University Plasmasphere‐Ionosphere Model (SUPIM) at the Instituto Nacional de Pesquisas Espaciais (INPE). The significant variability of the diurnal variations of the various ionospheric characteristics over equatorial and low latitudes on geomagnetically quiet days makes it difficult to unambiguously determine the ionospheric responses to the eclipse. Nonetheless, some specific issues can be derived, mainly using simulation results. The E and F1 layer critical frequencies and densities below 200 km are found to consistently depend on decreasing solar radiation. However, the F1 layer stratification observed at both TU and LS cannot be related to the eclipse or other processes. The F2 layer does not follow the changes in direct solar radiation during the eclipse. The SUPIM‐INPE‐modeled F region critical frequency and TEC are overestimated before the eclipse at LS and particularly at TU. However, these overestimations are within the observed large day‐to‐day variability. When an artificial prereversal enhancement is added, the simulations during the eclipse better reproduce the observations at JI, are qualitatively better for LS, and are out of phase for TU. The simulations are consistent with conjugate location effects.
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