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...
Published in: | Annales Geophysicae |
---|---|
Main Authors: | , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Copernicus Publications
2018
|
Subjects: | |
Online Access: | https://doi.org/10.5194/angeo-36-193-2018 https://noa.gwlb.de/receive/cop_mods_00007338 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00007295/angeo-36-193-2018.pdf https://angeo.copernicus.org/articles/36/193/2018/angeo-36-193-2018.pdf |
id |
ftnonlinearchiv:oai:noa.gwlb.de:cop_mods_00007338 |
---|---|
record_format |
openpolar |
spelling |
ftnonlinearchiv:oai:noa.gwlb.de:cop_mods_00007338 2023-05-15T13:34:49+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 2018-02 electronic https://doi.org/10.5194/angeo-36-193-2018 https://noa.gwlb.de/receive/cop_mods_00007338 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00007295/angeo-36-193-2018.pdf https://angeo.copernicus.org/articles/36/193/2018/angeo-36-193-2018.pdf eng eng Copernicus Publications Annales Geophysicae -- http://www.bibliothek.uni-regensburg.de/ezeit/?1458425 -- https://www.ann-geophys.net/ -- https://www.ann-geophys.net/volumes.html -- http://link.springer.com/journal/585 -- 1432-0576 https://doi.org/10.5194/angeo-36-193-2018 https://noa.gwlb.de/receive/cop_mods_00007338 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00007295/angeo-36-193-2018.pdf https://angeo.copernicus.org/articles/36/193/2018/angeo-36-193-2018.pdf https://creativecommons.org/licenses/by/4.0/ uneingeschränkt info:eu-repo/semantics/openAccess CC-BY article Verlagsveröffentlichung article Text doc-type:article 2018 ftnonlinearchiv https://doi.org/10.5194/angeo-36-193-2018 2022-02-08T22:58:34Z 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 single-station 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. Keywords. Ionosphere (wave propagation) – magnetospheric physics (polar cap phenomena; storms and substorms) Article in Journal/Newspaper Antarc* Antarctica Niedersächsisches Online-Archiv NOA Dome The ENVELOPE(166.000,166.000,-85.367,-85.367) Mario Zucchelli ENVELOPE(164.123,164.123,-74.695,-74.695) Mario Zucchelli Station ENVELOPE(164.117,164.117,-74.700,-74.700) Scott Base ENVELOPE(166.766,166.766,-77.849,-77.849) Talos Dome ENVELOPE(158.000,158.000,-73.000,-73.000) Annales Geophysicae 36 1 193 203 |
institution |
Open Polar |
collection |
Niedersächsisches Online-Archiv NOA |
op_collection_id |
ftnonlinearchiv |
language |
English |
topic |
article Verlagsveröffentlichung |
spellingShingle |
article Verlagsveröffentlichung 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 |
topic_facet |
article Verlagsveröffentlichung |
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 single-station 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. Keywords. Ionosphere (wave propagation) – magnetospheric physics (polar cap phenomena; storms and substorms) |
format |
Article in Journal/Newspaper |
author |
Regi, Mauro De Lauretis, Marcello Francia, Patrizia Lepidi, Stefania Piancatelli, Andrea Urbini, Stefano |
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 |
publisher |
Copernicus Publications |
publishDate |
2018 |
url |
https://doi.org/10.5194/angeo-36-193-2018 https://noa.gwlb.de/receive/cop_mods_00007338 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00007295/angeo-36-193-2018.pdf https://angeo.copernicus.org/articles/36/193/2018/angeo-36-193-2018.pdf |
long_lat |
ENVELOPE(166.000,166.000,-85.367,-85.367) ENVELOPE(164.123,164.123,-74.695,-74.695) ENVELOPE(164.117,164.117,-74.700,-74.700) ENVELOPE(166.766,166.766,-77.849,-77.849) ENVELOPE(158.000,158.000,-73.000,-73.000) |
geographic |
Dome The Mario Zucchelli Mario Zucchelli Station Scott Base Talos Dome |
geographic_facet |
Dome The Mario Zucchelli Mario Zucchelli Station Scott Base Talos Dome |
genre |
Antarc* Antarctica |
genre_facet |
Antarc* Antarctica |
op_relation |
Annales Geophysicae -- http://www.bibliothek.uni-regensburg.de/ezeit/?1458425 -- https://www.ann-geophys.net/ -- https://www.ann-geophys.net/volumes.html -- http://link.springer.com/journal/585 -- 1432-0576 https://doi.org/10.5194/angeo-36-193-2018 https://noa.gwlb.de/receive/cop_mods_00007338 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00007295/angeo-36-193-2018.pdf https://angeo.copernicus.org/articles/36/193/2018/angeo-36-193-2018.pdf |
op_rights |
https://creativecommons.org/licenses/by/4.0/ uneingeschränkt info:eu-repo/semantics/openAccess |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.5194/angeo-36-193-2018 |
container_title |
Annales Geophysicae |
container_volume |
36 |
container_issue |
1 |
container_start_page |
193 |
op_container_end_page |
203 |
_version_ |
1766058108374745088 |