Solar-cycle modifications of the effects of thermospheric winds on the height of the F2-layer over Antarctica
Results of analysis of the diurnal variations of hmF2 for Argentine Islands (65°15'S, 64°16'W) and Halley Bay (75°30'S, 26°40'W) are presented. It is shown that, for summer months, the diurnal variations can be approximated by simple sinusoidal functions, the phases of which vary...
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1976
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Online Access: | http://nora.nerc.ac.uk/id/eprint/525648/ https://doi.org/10.1016/0021-9169(76)90096-9 |
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ftnerc:oai:nora.nerc.ac.uk:525648 2023-05-15T13:41:44+02:00 Solar-cycle modifications of the effects of thermospheric winds on the height of the F2-layer over Antarctica Dudeney, J.R 1976 http://nora.nerc.ac.uk/id/eprint/525648/ https://doi.org/10.1016/0021-9169(76)90096-9 unknown Dudeney, J.R. 1976 Solar-cycle modifications of the effects of thermospheric winds on the height of the F2-layer over Antarctica. Journal of Atmospheric and Terrestrial Physics, 38 (3). 291-294. https://doi.org/10.1016/0021-9169(76)90096-9 <https://doi.org/10.1016/0021-9169(76)90096-9> Publication - Article PeerReviewed 1976 ftnerc https://doi.org/10.1016/0021-9169(76)90096-9 2023-02-04T19:49:32Z Results of analysis of the diurnal variations of hmF2 for Argentine Islands (65°15'S, 64°16'W) and Halley Bay (75°30'S, 26°40'W) are presented. It is shown that, for summer months, the diurnal variations can be approximated by simple sinusoidal functions, the phases of which vary smoothly with solar activity. This behaviour can be explained in terms of the effects of thermospheric winds; it results partly from a change in the relative importance of ‘ion drag’ and Coriolis force, and partly from changes in the chemistry which controls the characteristic time required for the layer to respond to the wind. A comparison of observations and theory suggests that the local solar time at which the thermospheric pressure maximum occurs does not vary with solar activity. Article in Journal/Newspaper Antarc* Antarctica Antarctica Journal Argentine Islands Natural Environment Research Council: NERC Open Research Archive Argentine Argentine Islands ENVELOPE(-64.273,-64.273,-65.246,-65.246) Journal of Atmospheric and Terrestrial Physics 38 3 291 294 |
institution |
Open Polar |
collection |
Natural Environment Research Council: NERC Open Research Archive |
op_collection_id |
ftnerc |
language |
unknown |
description |
Results of analysis of the diurnal variations of hmF2 for Argentine Islands (65°15'S, 64°16'W) and Halley Bay (75°30'S, 26°40'W) are presented. It is shown that, for summer months, the diurnal variations can be approximated by simple sinusoidal functions, the phases of which vary smoothly with solar activity. This behaviour can be explained in terms of the effects of thermospheric winds; it results partly from a change in the relative importance of ‘ion drag’ and Coriolis force, and partly from changes in the chemistry which controls the characteristic time required for the layer to respond to the wind. A comparison of observations and theory suggests that the local solar time at which the thermospheric pressure maximum occurs does not vary with solar activity. |
format |
Article in Journal/Newspaper |
author |
Dudeney, J.R |
spellingShingle |
Dudeney, J.R Solar-cycle modifications of the effects of thermospheric winds on the height of the F2-layer over Antarctica |
author_facet |
Dudeney, J.R |
author_sort |
Dudeney, J.R |
title |
Solar-cycle modifications of the effects of thermospheric winds on the height of the F2-layer over Antarctica |
title_short |
Solar-cycle modifications of the effects of thermospheric winds on the height of the F2-layer over Antarctica |
title_full |
Solar-cycle modifications of the effects of thermospheric winds on the height of the F2-layer over Antarctica |
title_fullStr |
Solar-cycle modifications of the effects of thermospheric winds on the height of the F2-layer over Antarctica |
title_full_unstemmed |
Solar-cycle modifications of the effects of thermospheric winds on the height of the F2-layer over Antarctica |
title_sort |
solar-cycle modifications of the effects of thermospheric winds on the height of the f2-layer over antarctica |
publishDate |
1976 |
url |
http://nora.nerc.ac.uk/id/eprint/525648/ https://doi.org/10.1016/0021-9169(76)90096-9 |
long_lat |
ENVELOPE(-64.273,-64.273,-65.246,-65.246) |
geographic |
Argentine Argentine Islands |
geographic_facet |
Argentine Argentine Islands |
genre |
Antarc* Antarctica Antarctica Journal Argentine Islands |
genre_facet |
Antarc* Antarctica Antarctica Journal Argentine Islands |
op_relation |
Dudeney, J.R. 1976 Solar-cycle modifications of the effects of thermospheric winds on the height of the F2-layer over Antarctica. Journal of Atmospheric and Terrestrial Physics, 38 (3). 291-294. https://doi.org/10.1016/0021-9169(76)90096-9 <https://doi.org/10.1016/0021-9169(76)90096-9> |
op_doi |
https://doi.org/10.1016/0021-9169(76)90096-9 |
container_title |
Journal of Atmospheric and Terrestrial Physics |
container_volume |
38 |
container_issue |
3 |
container_start_page |
291 |
op_container_end_page |
294 |
_version_ |
1766156132644028416 |