A study of geomagnetic field variations along the 80° S geomagnetic parallel
The availability of measurements of the geomagnetic field variations in Antarctica at three sites along the 80° S geomagnetic parallel, separated by approximately 1 h in magnetic local time, allows us to study the longitudinal dependence of the observed variations. In particular, using 1 min data fr...
Published in: | Annales Geophysicae |
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Online Access: | http://hdl.handle.net/2122/10790 https://doi.org/10.5194/angeo-35-139-2017 |
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ftingv:oai:www.earth-prints.org:2122/10790 2023-05-15T14:01:37+02:00 A study of geomagnetic field variations along the 80° S geomagnetic parallel Lepidi, Stefania Cafarella, Lili Francia, Patrizia Piancatelli, Andrea Pietrolungo, Manuela Santarelli, Lucia Urbini, Stefano Istituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione Roma2, Roma, Italia #PLACEHOLDER_PARENT_METADATA_VALUE# 2017 http://hdl.handle.net/2122/10790 https://doi.org/10.5194/angeo-35-139-2017 en eng Annales Geophysicae /35 (2017) http://hdl.handle.net/2122/10790 doi:10.5194/angeo-35-139-2017 open article 2017 ftingv https://doi.org/10.5194/angeo-35-139-2017 2022-08-30T22:26:07Z The availability of measurements of the geomagnetic field variations in Antarctica at three sites along the 80° S geomagnetic parallel, separated by approximately 1 h in magnetic local time, allows us to study the longitudinal dependence of the observed variations. In particular, using 1 min data from Mario Zucchelli Station, Scott Base and Talos Dome, a temporary installation during 2007–2008 Antarctic campaign, we investigated the diurnal variation and the low-frequency fluctuations (approximately in the Pc5 range, 1–7 mHz). We found that the daily variation is clearly ordered by local time, suggesting a predominant effect of the polar extension of midlatitude ionospheric currents. On the other hand, the pulsation power is dependent on magnetic local time maximizing around magnetic local noon, when the stations are closer to the polar cusp, while the highest coherence between pairs of stations is observed in the magnetic local nighttime sector. The wave propagation direction observed during selected events, one around local magnetic noon and the other around local magnetic midnight, is consistent with a solar-wind-driven source in the daytime and with substorm-associated processes in the nighttime. Published 139–146 1A. Geomagnetismo e Paleomagnetismo JCR Journal Article in Journal/Newspaper Antarc* Antarctic Antarctica Earth-Prints (Istituto Nazionale di Geofisica e Vulcanologia) Antarctic 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 35 1 139 146 |
institution |
Open Polar |
collection |
Earth-Prints (Istituto Nazionale di Geofisica e Vulcanologia) |
op_collection_id |
ftingv |
language |
English |
description |
The availability of measurements of the geomagnetic field variations in Antarctica at three sites along the 80° S geomagnetic parallel, separated by approximately 1 h in magnetic local time, allows us to study the longitudinal dependence of the observed variations. In particular, using 1 min data from Mario Zucchelli Station, Scott Base and Talos Dome, a temporary installation during 2007–2008 Antarctic campaign, we investigated the diurnal variation and the low-frequency fluctuations (approximately in the Pc5 range, 1–7 mHz). We found that the daily variation is clearly ordered by local time, suggesting a predominant effect of the polar extension of midlatitude ionospheric currents. On the other hand, the pulsation power is dependent on magnetic local time maximizing around magnetic local noon, when the stations are closer to the polar cusp, while the highest coherence between pairs of stations is observed in the magnetic local nighttime sector. The wave propagation direction observed during selected events, one around local magnetic noon and the other around local magnetic midnight, is consistent with a solar-wind-driven source in the daytime and with substorm-associated processes in the nighttime. Published 139–146 1A. Geomagnetismo e Paleomagnetismo JCR Journal |
author2 |
Istituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione Roma2, Roma, Italia #PLACEHOLDER_PARENT_METADATA_VALUE# |
format |
Article in Journal/Newspaper |
author |
Lepidi, Stefania Cafarella, Lili Francia, Patrizia Piancatelli, Andrea Pietrolungo, Manuela Santarelli, Lucia Urbini, Stefano |
spellingShingle |
Lepidi, Stefania Cafarella, Lili Francia, Patrizia Piancatelli, Andrea Pietrolungo, Manuela Santarelli, Lucia Urbini, Stefano A study of geomagnetic field variations along the 80° S geomagnetic parallel |
author_facet |
Lepidi, Stefania Cafarella, Lili Francia, Patrizia Piancatelli, Andrea Pietrolungo, Manuela Santarelli, Lucia Urbini, Stefano |
author_sort |
Lepidi, Stefania |
title |
A study of geomagnetic field variations along the 80° S geomagnetic parallel |
title_short |
A study of geomagnetic field variations along the 80° S geomagnetic parallel |
title_full |
A study of geomagnetic field variations along the 80° S geomagnetic parallel |
title_fullStr |
A study of geomagnetic field variations along the 80° S geomagnetic parallel |
title_full_unstemmed |
A study of geomagnetic field variations along the 80° S geomagnetic parallel |
title_sort |
study of geomagnetic field variations along the 80° s geomagnetic parallel |
publishDate |
2017 |
url |
http://hdl.handle.net/2122/10790 https://doi.org/10.5194/angeo-35-139-2017 |
long_lat |
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 |
Antarctic Mario Zucchelli Mario Zucchelli Station Scott Base Talos Dome |
geographic_facet |
Antarctic Mario Zucchelli Mario Zucchelli Station Scott Base Talos Dome |
genre |
Antarc* Antarctic Antarctica |
genre_facet |
Antarc* Antarctic Antarctica |
op_relation |
Annales Geophysicae /35 (2017) http://hdl.handle.net/2122/10790 doi:10.5194/angeo-35-139-2017 |
op_rights |
open |
op_doi |
https://doi.org/10.5194/angeo-35-139-2017 |
container_title |
Annales Geophysicae |
container_volume |
35 |
container_issue |
1 |
container_start_page |
139 |
op_container_end_page |
146 |
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1766271583061540864 |