The geomagnetic coast effect at two 80° S stations in Antarctica, observed in the ULF range
We examined the coast effect in Antarctica along the 80 S magnetic parallel. We used the geomagnetic field measurements at the two coastal stations of Mario Zucchelli Station and Scott Base, and, as a reference, at the inland temporary station Talos Dome, during 18 January– 14 March 2008. Spectral a...
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ftingv:oai:www.earth-prints.org:2122/10795 2023-05-15T14:01:37+02:00 The geomagnetic coast effect at two 80° S stations in Antarctica, observed in the ULF range Regi, Mauro De Lauretis, Marcello Francia, Patrizia Lepidi, Stefania Piancatelli, Andrea Urbini, Stefano #PLACEHOLDER_PARENT_METADATA_VALUE# Istituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione Roma2, Roma, Italia 2018 http://hdl.handle.net/2122/10795 https://doi.org/10.5194/angeo-36-193-2018 en eng Annales Geophysicae /36 (2017) http://hdl.handle.net/2122/10795 doi:10.5194/angeo-36-193-2018 open article 2018 ftingv https://doi.org/10.5194/angeo-36-193-2018 2022-08-30T22:26:07Z We examined the coast effect in Antarctica along the 80 S magnetic parallel. We used the geomagnetic field measurements at the two coastal stations of Mario Zucchelli Station and Scott Base, and, as a reference, at the inland temporary station Talos Dome, during 18 January– 14 March 2008. Spectral analysis in the Pc5 frequency range (1–7 mHz) revealed large differences between coastal and inland stations, such as higher spectral power levels in the vertical component and higher coherence between horizontal and vertical components at coastal stations. Using the interstation method on selected active time intervals, with Talos Dome as a remote reference station, we found that remote reference induction arrows are directed almost perpendicularly with respect to their respective coastlines. Moreover, the singlestation analysis shows that at Talos Dome the amplitude of the induction arrows is much smaller than at coastal stations. These results clearly indicate that coast effect at a few hundred kilometers from the coastline is relatively small. The coast effect on polarization parameters was examined, for a Pc5 event that occurred on 11 March 2008. The results evidenced that the azimuthal angle of polarized signals at one of the coastal stations is largely different with respect to the inland station (by 110 ), while the polarization ratio and ellipticity attain comparable values. We proposed a correction method of the polarization parameters, which operates directly in the frequency domain, obtaining comparable azimuthal angles at coastal and inland stations. Published 193–203 1A. Geomagnetismo e Paleomagnetismo JCR Journal Article in Journal/Newspaper Antarc* Antarctica Earth-Prints (Istituto Nazionale di Geofisica e Vulcanologia) Talos Dome ENVELOPE(158.000,158.000,-73.000,-73.000) Scott Base ENVELOPE(166.766,166.766,-77.849,-77.849) Mario Zucchelli ENVELOPE(164.123,164.123,-74.695,-74.695) Dome The ENVELOPE(166.000,166.000,-85.367,-85.367) Mario Zucchelli Station ENVELOPE(164.117,164.117,-74.700,-74.700) Annales Geophysicae 36 1 193 203 |
institution |
Open Polar |
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Earth-Prints (Istituto Nazionale di Geofisica e Vulcanologia) |
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ftingv |
language |
English |
description |
We examined the coast effect in Antarctica along the 80 S magnetic parallel. We used the geomagnetic field measurements at the two coastal stations of Mario Zucchelli Station and Scott Base, and, as a reference, at the inland temporary station Talos Dome, during 18 January– 14 March 2008. Spectral analysis in the Pc5 frequency range (1–7 mHz) revealed large differences between coastal and inland stations, such as higher spectral power levels in the vertical component and higher coherence between horizontal and vertical components at coastal stations. Using the interstation method on selected active time intervals, with Talos Dome as a remote reference station, we found that remote reference induction arrows are directed almost perpendicularly with respect to their respective coastlines. Moreover, the singlestation analysis shows that at Talos Dome the amplitude of the induction arrows is much smaller than at coastal stations. These results clearly indicate that coast effect at a few hundred kilometers from the coastline is relatively small. The coast effect on polarization parameters was examined, for a Pc5 event that occurred on 11 March 2008. The results evidenced that the azimuthal angle of polarized signals at one of the coastal stations is largely different with respect to the inland station (by 110 ), while the polarization ratio and ellipticity attain comparable values. We proposed a correction method of the polarization parameters, which operates directly in the frequency domain, obtaining comparable azimuthal angles at coastal and inland stations. Published 193–203 1A. Geomagnetismo e Paleomagnetismo JCR Journal |
author2 |
#PLACEHOLDER_PARENT_METADATA_VALUE# Istituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione Roma2, Roma, Italia |
format |
Article in Journal/Newspaper |
author |
Regi, Mauro De Lauretis, Marcello Francia, Patrizia Lepidi, Stefania Piancatelli, Andrea Urbini, Stefano |
spellingShingle |
Regi, Mauro De Lauretis, Marcello Francia, Patrizia Lepidi, Stefania Piancatelli, Andrea Urbini, Stefano The geomagnetic coast effect at two 80° S stations in Antarctica, observed in the ULF range |
author_facet |
Regi, Mauro De Lauretis, Marcello Francia, Patrizia Lepidi, Stefania Piancatelli, Andrea Urbini, Stefano |
author_sort |
Regi, Mauro |
title |
The geomagnetic coast effect at two 80° S stations in Antarctica, observed in the ULF range |
title_short |
The geomagnetic coast effect at two 80° S stations in Antarctica, observed in the ULF range |
title_full |
The geomagnetic coast effect at two 80° S stations in Antarctica, observed in the ULF range |
title_fullStr |
The geomagnetic coast effect at two 80° S stations in Antarctica, observed in the ULF range |
title_full_unstemmed |
The geomagnetic coast effect at two 80° S stations in Antarctica, observed in the ULF range |
title_sort |
geomagnetic coast effect at two 80° s stations in antarctica, observed in the ulf range |
publishDate |
2018 |
url |
http://hdl.handle.net/2122/10795 https://doi.org/10.5194/angeo-36-193-2018 |
long_lat |
ENVELOPE(158.000,158.000,-73.000,-73.000) ENVELOPE(166.766,166.766,-77.849,-77.849) ENVELOPE(164.123,164.123,-74.695,-74.695) ENVELOPE(166.000,166.000,-85.367,-85.367) ENVELOPE(164.117,164.117,-74.700,-74.700) |
geographic |
Talos Dome Scott Base Mario Zucchelli Dome The Mario Zucchelli Station |
geographic_facet |
Talos Dome Scott Base Mario Zucchelli Dome The Mario Zucchelli Station |
genre |
Antarc* Antarctica |
genre_facet |
Antarc* Antarctica |
op_relation |
Annales Geophysicae /36 (2017) http://hdl.handle.net/2122/10795 doi:10.5194/angeo-36-193-2018 |
op_rights |
open |
op_doi |
https://doi.org/10.5194/angeo-36-193-2018 |
container_title |
Annales Geophysicae |
container_volume |
36 |
container_issue |
1 |
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193 |
op_container_end_page |
203 |
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1766271583232458752 |