Daily variation at three Antarctic geomagnetic observatories within the polar cap
In this work we present a statistical analysis of the diurnal variation as observed at three Antarctic observatories located at different positions within the polar cap during the year 2006. Data used for the analysis are from the Italian geomagnetic observatory at Mario Zucchelli Station (formerly...
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ftdoajarticles:oai:doaj.org/article:eab5f58cc4294c8b846d84dab7a17a99 2023-05-15T14:03:49+02:00 Daily variation at three Antarctic geomagnetic observatories within the polar cap M. Pietrolungo S. Lepidi L. Cafarella L. Santarelli D. Di Mauro 2008-08-01T00:00:00Z https://doi.org/10.5194/angeo-26-2179-2008 https://doaj.org/article/eab5f58cc4294c8b846d84dab7a17a99 EN eng Copernicus Publications https://www.ann-geophys.net/26/2179/2008/angeo-26-2179-2008.pdf https://doaj.org/toc/0992-7689 https://doaj.org/toc/1432-0576 doi:10.5194/angeo-26-2179-2008 0992-7689 1432-0576 https://doaj.org/article/eab5f58cc4294c8b846d84dab7a17a99 Annales Geophysicae, Vol 26, Pp 2179-2190 (2008) Science Q Physics QC1-999 Geophysics. Cosmic physics QC801-809 article 2008 ftdoajarticles https://doi.org/10.5194/angeo-26-2179-2008 2022-12-31T12:29:06Z In this work we present a statistical analysis of the diurnal variation as observed at three Antarctic observatories located at different positions within the polar cap during the year 2006. Data used for the analysis are from the Italian geomagnetic observatory at Mario Zucchelli Station (formerly Terra Nova Bay, geographic latitude 74.7° S, corrected geomagnetic latitude 80.0° S), from the French-Italian observatory at Concordia Station (75.1° S, 88.9° S) and from the French observatory at Dumont D'Urville (66.7° S, 80.4° S), which are located in pairs at the same geographic and corrected geomagnetic latitude; such a position allows to distinguish whether the geographic or the geomagnetic reference system is better suitable to describe the observed phenomena at so high latitudes. The peculiarities of the daily variation as observed during this year and its relation with the observatory location and magnetospheric and interplanetary conditions were analysed. Data were also studied taking into account different Lloyd seasons. The results indicate that the 24-h variation is quite persistent, but its amplitude strongly depends on season and global geomagnetic activity: indeed, it almost vanishes during local winter for quiet geomagnetic conditions; this reduction is more evident at the stations closer to the geographic pole, where the solar radiation reduction during winter is more dramatic. The Interplanetary Magnetic Field orientation has been found to be important in that the north-south and the east-west components control the amplitude and the diurnal pattern of the variation, respectively. Article in Journal/Newspaper Antarc* Antarctic Directory of Open Access Journals: DOAJ Articles Antarctic Concordia Station ENVELOPE(123.333,123.333,-75.100,-75.100) Dumont d'Urville ENVELOPE(140.017,140.017,-66.667,-66.667) Dumont-d'Urville ENVELOPE(140.013,140.013,-66.667,-66.667) Mario Zucchelli ENVELOPE(164.123,164.123,-74.695,-74.695) Mario Zucchelli Station ENVELOPE(164.117,164.117,-74.700,-74.700) Terra Nova Bay Annales Geophysicae 26 8 2179 2190 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Science Q Physics QC1-999 Geophysics. Cosmic physics QC801-809 |
spellingShingle |
Science Q Physics QC1-999 Geophysics. Cosmic physics QC801-809 M. Pietrolungo S. Lepidi L. Cafarella L. Santarelli D. Di Mauro Daily variation at three Antarctic geomagnetic observatories within the polar cap |
topic_facet |
Science Q Physics QC1-999 Geophysics. Cosmic physics QC801-809 |
description |
In this work we present a statistical analysis of the diurnal variation as observed at three Antarctic observatories located at different positions within the polar cap during the year 2006. Data used for the analysis are from the Italian geomagnetic observatory at Mario Zucchelli Station (formerly Terra Nova Bay, geographic latitude 74.7° S, corrected geomagnetic latitude 80.0° S), from the French-Italian observatory at Concordia Station (75.1° S, 88.9° S) and from the French observatory at Dumont D'Urville (66.7° S, 80.4° S), which are located in pairs at the same geographic and corrected geomagnetic latitude; such a position allows to distinguish whether the geographic or the geomagnetic reference system is better suitable to describe the observed phenomena at so high latitudes. The peculiarities of the daily variation as observed during this year and its relation with the observatory location and magnetospheric and interplanetary conditions were analysed. Data were also studied taking into account different Lloyd seasons. The results indicate that the 24-h variation is quite persistent, but its amplitude strongly depends on season and global geomagnetic activity: indeed, it almost vanishes during local winter for quiet geomagnetic conditions; this reduction is more evident at the stations closer to the geographic pole, where the solar radiation reduction during winter is more dramatic. The Interplanetary Magnetic Field orientation has been found to be important in that the north-south and the east-west components control the amplitude and the diurnal pattern of the variation, respectively. |
format |
Article in Journal/Newspaper |
author |
M. Pietrolungo S. Lepidi L. Cafarella L. Santarelli D. Di Mauro |
author_facet |
M. Pietrolungo S. Lepidi L. Cafarella L. Santarelli D. Di Mauro |
author_sort |
M. Pietrolungo |
title |
Daily variation at three Antarctic geomagnetic observatories within the polar cap |
title_short |
Daily variation at three Antarctic geomagnetic observatories within the polar cap |
title_full |
Daily variation at three Antarctic geomagnetic observatories within the polar cap |
title_fullStr |
Daily variation at three Antarctic geomagnetic observatories within the polar cap |
title_full_unstemmed |
Daily variation at three Antarctic geomagnetic observatories within the polar cap |
title_sort |
daily variation at three antarctic geomagnetic observatories within the polar cap |
publisher |
Copernicus Publications |
publishDate |
2008 |
url |
https://doi.org/10.5194/angeo-26-2179-2008 https://doaj.org/article/eab5f58cc4294c8b846d84dab7a17a99 |
long_lat |
ENVELOPE(123.333,123.333,-75.100,-75.100) ENVELOPE(140.017,140.017,-66.667,-66.667) ENVELOPE(140.013,140.013,-66.667,-66.667) ENVELOPE(164.123,164.123,-74.695,-74.695) ENVELOPE(164.117,164.117,-74.700,-74.700) |
geographic |
Antarctic Concordia Station Dumont d'Urville Dumont-d'Urville Mario Zucchelli Mario Zucchelli Station Terra Nova Bay |
geographic_facet |
Antarctic Concordia Station Dumont d'Urville Dumont-d'Urville Mario Zucchelli Mario Zucchelli Station Terra Nova Bay |
genre |
Antarc* Antarctic |
genre_facet |
Antarc* Antarctic |
op_source |
Annales Geophysicae, Vol 26, Pp 2179-2190 (2008) |
op_relation |
https://www.ann-geophys.net/26/2179/2008/angeo-26-2179-2008.pdf https://doaj.org/toc/0992-7689 https://doaj.org/toc/1432-0576 doi:10.5194/angeo-26-2179-2008 0992-7689 1432-0576 https://doaj.org/article/eab5f58cc4294c8b846d84dab7a17a99 |
op_doi |
https://doi.org/10.5194/angeo-26-2179-2008 |
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Annales Geophysicae |
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26 |
container_issue |
8 |
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2179 |
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2190 |
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1766274671898001408 |