Ionospheric and geomagnetic response to the total solar eclipse on 21 August 2017
| Autor: | Guillermo Luis Bosch, Bernardo Eylenstein, María Paula Natali, Amalia Meza |
|---|---|
| Rok vydání: | 2022 |
| Předmět: |
Earth and Planetary Astrophysics (astro-ph.EP)
Atmospheric Science Total electron content Solar eclipse FOS: Physical sciences Aerospace Engineering Magnitude (mathematics) Flux Astronomy and Astrophysics Geodesy Space Physics (physics.space-ph) Physics::Geophysics Physics - Atmospheric and Oceanic Physics Geophysics Earth's magnetic field Physics - Space Physics Space and Planetary Science Atmospheric and Oceanic Physics (physics.ao-ph) Physics::Space Physics General Earth and Planetary Sciences Intermagnet Ionosphere Geology Astrophysics - Earth and Planetary Astrophysics Eclipse |
| Zdroj: | Advances in Space Research. 69:16-25 |
| ISSN: | 0273-1177 |
| DOI: | 10.1016/j.asr.2021.07.029 |
| Popis: | Solar eclipses provide an excellent opportunity to study the effects of a sudden localized change in photoionization flux in the Earth's ionosphere and its consequent repercussion in the Geomagnetic field. We have focused on a subset of the data available from the North American 2017 eclipse in order to study VTEC measurements from GNSS data and geomagnetic field estimations from INTERMAGNET observatories near the eclipse path. Our simultaneous analysis of both datasets allowed us to quantify the ionosphere and magnetic field reaction to the eclipse event with which allowed us to compare how differently these take place in time. We found that studying the behaviour of VTEC differences with respect to reference values provides better insight of the actual eclipse effect and were able to characterize the dependence of parameters such as time delay of maximum depletion and recovery phase. We were also able to test models that link the ionospheric variations in a quantitative manner. Total electron content depletion measured from GNSS were fed into an approximation of Ashour-Chapman model at the locations of geomagnetic observatories and its predictions match the behaviour of magnetic field components in time and magnitude strikingly accurately. Comment: Accepted for publication in Advances in Space Research |
| Databáze: | OpenAIRE |
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