F2-layer parameters long-term trends at the Argentine Islands and Port Stanley stations
The ionospheric sounding data at two southern hemisphere stations, the Argentine Islands and Port Stanley, are analyzed using a method previously developed by the authors. Negative trends of the critical frequency foF2 are found for both stations. The magnitudes of the trends are close to those at t...
Published in: | Annales Geophysicae |
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Language: | English |
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Copernicus Publications
2001
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ftnonlinearchiv:oai:noa.gwlb.de:cop_mods_00036474 2023-05-15T15:23:21+02:00 F2-layer parameters long-term trends at the Argentine Islands and Port Stanley stations Danilov, A. D. Mikhailov, A. V. 2001-03 electronic https://doi.org/10.5194/angeo-19-341-2001 https://noa.gwlb.de/receive/cop_mods_00036474 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00036428/angeo-19-341-2001.pdf https://angeo.copernicus.org/articles/19/341/2001/angeo-19-341-2001.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-19-341-2001 https://noa.gwlb.de/receive/cop_mods_00036474 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00036428/angeo-19-341-2001.pdf https://angeo.copernicus.org/articles/19/341/2001/angeo-19-341-2001.pdf uneingeschränkt info:eu-repo/semantics/openAccess article Verlagsveröffentlichung article Text doc-type:article 2001 ftnonlinearchiv https://doi.org/10.5194/angeo-19-341-2001 2022-02-08T22:43:59Z The ionospheric sounding data at two southern hemisphere stations, the Argentine Islands and Port Stanley, are analyzed using a method previously developed by the authors. Negative trends of the critical frequency foF2 are found for both stations. The magnitudes of the trends are close to those at the corresponding (close geomagnetic latitude) stations of the northern hemisphere, as considered previously by the authors. The values of the F2 layer height hmF2 absolute trends ΔhmF2 are considered. The effect of ΔhmF2 dependence on hmF2 found by Jarvis et al. (1998) is reproduced. A concept is considered that long-term changes of the geomagnetic activity may be an important (if not the only) cause of all the trends of foF2 and hmF2 derived by several groups of authors. The dependence of both parameters on the geomagnetic index Ap corresponds to a smooth scheme of the ionospheric storm physics and morphology; thus, a principal cause of the foF2 and hmF2 geomagnetic trends is most probably a trend found in several publications in the number and intensity of ionospheric storms. Key words. Ionosphere (ionosphere-atmosphere interaction; ionospheric disturbances) Article in Journal/Newspaper Argentine Islands Niedersächsisches Online-Archiv NOA Argentine Argentine Islands ENVELOPE(-64.273,-64.273,-65.246,-65.246) Annales Geophysicae 19 3 341 349 |
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Niedersächsisches Online-Archiv NOA |
op_collection_id |
ftnonlinearchiv |
language |
English |
topic |
article Verlagsveröffentlichung |
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article Verlagsveröffentlichung Danilov, A. D. Mikhailov, A. V. F2-layer parameters long-term trends at the Argentine Islands and Port Stanley stations |
topic_facet |
article Verlagsveröffentlichung |
description |
The ionospheric sounding data at two southern hemisphere stations, the Argentine Islands and Port Stanley, are analyzed using a method previously developed by the authors. Negative trends of the critical frequency foF2 are found for both stations. The magnitudes of the trends are close to those at the corresponding (close geomagnetic latitude) stations of the northern hemisphere, as considered previously by the authors. The values of the F2 layer height hmF2 absolute trends ΔhmF2 are considered. The effect of ΔhmF2 dependence on hmF2 found by Jarvis et al. (1998) is reproduced. A concept is considered that long-term changes of the geomagnetic activity may be an important (if not the only) cause of all the trends of foF2 and hmF2 derived by several groups of authors. The dependence of both parameters on the geomagnetic index Ap corresponds to a smooth scheme of the ionospheric storm physics and morphology; thus, a principal cause of the foF2 and hmF2 geomagnetic trends is most probably a trend found in several publications in the number and intensity of ionospheric storms. Key words. Ionosphere (ionosphere-atmosphere interaction; ionospheric disturbances) |
format |
Article in Journal/Newspaper |
author |
Danilov, A. D. Mikhailov, A. V. |
author_facet |
Danilov, A. D. Mikhailov, A. V. |
author_sort |
Danilov, A. D. |
title |
F2-layer parameters long-term trends at the Argentine Islands and Port Stanley stations |
title_short |
F2-layer parameters long-term trends at the Argentine Islands and Port Stanley stations |
title_full |
F2-layer parameters long-term trends at the Argentine Islands and Port Stanley stations |
title_fullStr |
F2-layer parameters long-term trends at the Argentine Islands and Port Stanley stations |
title_full_unstemmed |
F2-layer parameters long-term trends at the Argentine Islands and Port Stanley stations |
title_sort |
f2-layer parameters long-term trends at the argentine islands and port stanley stations |
publisher |
Copernicus Publications |
publishDate |
2001 |
url |
https://doi.org/10.5194/angeo-19-341-2001 https://noa.gwlb.de/receive/cop_mods_00036474 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00036428/angeo-19-341-2001.pdf https://angeo.copernicus.org/articles/19/341/2001/angeo-19-341-2001.pdf |
long_lat |
ENVELOPE(-64.273,-64.273,-65.246,-65.246) |
geographic |
Argentine Argentine Islands |
geographic_facet |
Argentine Argentine Islands |
genre |
Argentine Islands |
genre_facet |
Argentine Islands |
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-19-341-2001 https://noa.gwlb.de/receive/cop_mods_00036474 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00036428/angeo-19-341-2001.pdf https://angeo.copernicus.org/articles/19/341/2001/angeo-19-341-2001.pdf |
op_rights |
uneingeschränkt info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.5194/angeo-19-341-2001 |
container_title |
Annales Geophysicae |
container_volume |
19 |
container_issue |
3 |
container_start_page |
341 |
op_container_end_page |
349 |
_version_ |
1766354053151850496 |