Low and mid-frequency pulsations in the polar cap: polarization pattern and MLT dependence of the spectral power during the descending phase of the solar cycle
We present a statistical analysis of ULF (1-100 mHz) geomagnetic measurements conducted during years 2003- 2006 at the Italian/French base of Concordia at Dome C, close to the geomagnetic pole, and at the Italian base «Mario Zucchelli» at Terra Nova Bay, also located in the polar cap, but at lower l...
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ftdoajarticles:oai:doaj.org/article:68dece6a1854406fb148d1a8e4f7e1d8 2023-05-15T13:32:08+02:00 Low and mid-frequency pulsations in the polar cap: polarization pattern and MLT dependence of the spectral power during the descending phase of the solar cycle Massimo Vellante Andrea Piancatelli Patrizia Francia Marcello De Lauretis Umberto Villante 2009-06-01T00:00:00Z https://doi.org/10.4401/ag-4570 https://doaj.org/article/68dece6a1854406fb148d1a8e4f7e1d8 EN eng Istituto Nazionale di Geofisica e Vulcanologia (INGV) http://www.annalsofgeophysics.eu/index.php/annals/article/view/4570 https://doaj.org/toc/1593-5213 https://doaj.org/toc/2037-416X doi:10.4401/ag-4570 1593-5213 2037-416X https://doaj.org/article/68dece6a1854406fb148d1a8e4f7e1d8 Annals of Geophysics, Vol 52, Iss 1, Pp 27-34 (2009) ULF waves – Antarctica – Geomagnetic pulsations – Polarization pattern – upstream waves Meteorology. Climatology QC851-999 Geophysics. Cosmic physics QC801-809 article 2009 ftdoajarticles https://doi.org/10.4401/ag-4570 2022-12-31T14:10:45Z We present a statistical analysis of ULF (1-100 mHz) geomagnetic measurements conducted during years 2003- 2006 at the Italian/French base of Concordia at Dome C, close to the geomagnetic pole, and at the Italian base «Mario Zucchelli» at Terra Nova Bay, also located in the polar cap, but at lower latitude. Our analysis shows that high latitude ULF pulsation power is largely controlled by the solar wind speed. At Terra Nova Bay the power shows a maximum at local noon, clearly related to cusp and closed field lines phenomena. At few mHz, the polarization pattern indicates field line resonances driven, just equatorward with respect to the station, by waves propagating tailward; the polarization of higher frequency pulsations, mostly originated from interplanetary upstream waves, suggests waves propagating sunward from the night sector. At Dome C the wave power shows a small enhancement in the local morning, more pronounced for mid-frequency pulsations; the polarization pattern, at all frequencies, appears to indicate waves propagating sunward from the night sector, suggesting a propagation channel to the ground via the magnetotail lobes. Article in Journal/Newspaper Antarc* Antarctica Geomagnetic Pole Directory of Open Access Journals: DOAJ Articles Mario Zucchelli ENVELOPE(164.123,164.123,-74.695,-74.695) Terra Nova Bay Annals of Geophysics 52 1 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
ULF waves – Antarctica – Geomagnetic pulsations – Polarization pattern – upstream waves Meteorology. Climatology QC851-999 Geophysics. Cosmic physics QC801-809 |
spellingShingle |
ULF waves – Antarctica – Geomagnetic pulsations – Polarization pattern – upstream waves Meteorology. Climatology QC851-999 Geophysics. Cosmic physics QC801-809 Massimo Vellante Andrea Piancatelli Patrizia Francia Marcello De Lauretis Umberto Villante Low and mid-frequency pulsations in the polar cap: polarization pattern and MLT dependence of the spectral power during the descending phase of the solar cycle |
topic_facet |
ULF waves – Antarctica – Geomagnetic pulsations – Polarization pattern – upstream waves Meteorology. Climatology QC851-999 Geophysics. Cosmic physics QC801-809 |
description |
We present a statistical analysis of ULF (1-100 mHz) geomagnetic measurements conducted during years 2003- 2006 at the Italian/French base of Concordia at Dome C, close to the geomagnetic pole, and at the Italian base «Mario Zucchelli» at Terra Nova Bay, also located in the polar cap, but at lower latitude. Our analysis shows that high latitude ULF pulsation power is largely controlled by the solar wind speed. At Terra Nova Bay the power shows a maximum at local noon, clearly related to cusp and closed field lines phenomena. At few mHz, the polarization pattern indicates field line resonances driven, just equatorward with respect to the station, by waves propagating tailward; the polarization of higher frequency pulsations, mostly originated from interplanetary upstream waves, suggests waves propagating sunward from the night sector. At Dome C the wave power shows a small enhancement in the local morning, more pronounced for mid-frequency pulsations; the polarization pattern, at all frequencies, appears to indicate waves propagating sunward from the night sector, suggesting a propagation channel to the ground via the magnetotail lobes. |
format |
Article in Journal/Newspaper |
author |
Massimo Vellante Andrea Piancatelli Patrizia Francia Marcello De Lauretis Umberto Villante |
author_facet |
Massimo Vellante Andrea Piancatelli Patrizia Francia Marcello De Lauretis Umberto Villante |
author_sort |
Massimo Vellante |
title |
Low and mid-frequency pulsations in the polar cap: polarization pattern and MLT dependence of the spectral power during the descending phase of the solar cycle |
title_short |
Low and mid-frequency pulsations in the polar cap: polarization pattern and MLT dependence of the spectral power during the descending phase of the solar cycle |
title_full |
Low and mid-frequency pulsations in the polar cap: polarization pattern and MLT dependence of the spectral power during the descending phase of the solar cycle |
title_fullStr |
Low and mid-frequency pulsations in the polar cap: polarization pattern and MLT dependence of the spectral power during the descending phase of the solar cycle |
title_full_unstemmed |
Low and mid-frequency pulsations in the polar cap: polarization pattern and MLT dependence of the spectral power during the descending phase of the solar cycle |
title_sort |
low and mid-frequency pulsations in the polar cap: polarization pattern and mlt dependence of the spectral power during the descending phase of the solar cycle |
publisher |
Istituto Nazionale di Geofisica e Vulcanologia (INGV) |
publishDate |
2009 |
url |
https://doi.org/10.4401/ag-4570 https://doaj.org/article/68dece6a1854406fb148d1a8e4f7e1d8 |
long_lat |
ENVELOPE(164.123,164.123,-74.695,-74.695) |
geographic |
Mario Zucchelli Terra Nova Bay |
geographic_facet |
Mario Zucchelli Terra Nova Bay |
genre |
Antarc* Antarctica Geomagnetic Pole |
genre_facet |
Antarc* Antarctica Geomagnetic Pole |
op_source |
Annals of Geophysics, Vol 52, Iss 1, Pp 27-34 (2009) |
op_relation |
http://www.annalsofgeophysics.eu/index.php/annals/article/view/4570 https://doaj.org/toc/1593-5213 https://doaj.org/toc/2037-416X doi:10.4401/ag-4570 1593-5213 2037-416X https://doaj.org/article/68dece6a1854406fb148d1a8e4f7e1d8 |
op_doi |
https://doi.org/10.4401/ag-4570 |
container_title |
Annals of Geophysics |
container_volume |
52 |
container_issue |
1 |
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1766024503323787264 |