Formation of ionospheric irregularities over Southeast Asia during the 2015 St. Patrick's Day storm
| Autor: | Nicolas Floury, Fabio Dovis, Elvira Musicò, Michael Pezzopane, Fitri Nuraeni, Lucilla Alfonsi, Gabriella Povero, Rodrigo Romero, Luca Spogli, Nicola Linty, Marco Pini, Minh Le Huy, Valdir Gil Pillat, Asnawi Husin, Prayitno Abadi, Tran Thi Lan, D. Di Mauro, Claudio Cesaroni |
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| Rok vydání: | 2016 |
| Předmět: |
Geomagnetic storm
010504 meteorology & atmospheric sciences Meteorology Total electron content Anomaly (natural sciences) Storm 01 natural sciences Physics::Geophysics Solar cycle Geophysics Altitude Space and Planetary Science GNSS applications Physics::Space Physics 0103 physical sciences Ionosphere 010303 astronomy & astrophysics Physics::Atmospheric and Oceanic Physics Geology 0105 earth and related environmental sciences |
| Zdroj: | Journal of Geophysical Research: Space Physics. 121:12-12,233 |
| ISSN: | 2169-9380 |
| DOI: | 10.1002/2016ja023222 |
| Popis: | We investigate the geospace response to the 2015 St. Patrick's Day storm leveraging on instruments spread over Southeast Asia (SEA), covering a wide longitudinal sector of the low-latitude ionosphere. A regional characterization of the storm is provided, identifying the peculiarities of ionospheric irregularity formation. The novelties of this work are the characterization in a broad longitudinal range and the methodology relying on the integration of data acquired by Global Navigation Satellite System (GNSS) receivers, magnetometers, ionosondes, and Swarm satellites. This work is a legacy of the project EquatoRial Ionosphere Characterization in Asia (ERICA). ERICA aimed to capture the features of both crests of the equatorial ionospheric anomaly (EIA) and trough (EIT) by means of a dedicated measurement campaign. The campaign lasted from March to October 2015 and was able to observe the ionospheric variability causing effects on radio systems, GNSS in particular. The multiinstrumental and multiparametric observations of the region enabled an in-depth investigation of the response to the largest geomagnetic storm of the current solar cycle in a region scarcely reported in literature. Our work discusses the comparison between northern and southern crests of the EIA in the SEA region. The observations recorded positive and negative ionospheric storms, spread F conditions, scintillation enhancement and inhibition, and total electron content variability. The ancillary information on the local magnetic field highlights the variety of ionospheric perturbations during the different storm phases. The combined use of ionospheric bottomside, topside, and integrated information points out how the storm affects the F layer altitude and the consequent enhancement/suppression of scintillations. |
| Databáze: | OpenAIRE |
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