Southern Hemisphere poleward moving auroral forms
[1] This paper presents a statistical study of Southern Hemisphere poleward moving auroral forms (PMAFs) using optical data from the US Automatic Geophysical Observatory network in Antarctica. These Southern Hemisphere events are compared with Northern Hemisphere PMAFs, which have previously been ob...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.550.9306 2023-05-15T13:53:26+02:00 Southern Hemisphere poleward moving auroral forms E. E. Drury S. B. Mende H. U. Frey J. H. Doolittle The Pennsylvania State University CiteSeerX Archives application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.550.9306 http://sprg.ssl.berkeley.edu/sprite/ago96/publication/2001JA007536.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.550.9306 http://sprg.ssl.berkeley.edu/sprite/ago96/publication/2001JA007536.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://sprg.ssl.berkeley.edu/sprite/ago96/publication/2001JA007536.pdf Hemisphere PMAFs is observed consistent with Northern Hemisphere events. INDEX text ftciteseerx 2016-01-08T11:33:27Z [1] This paper presents a statistical study of Southern Hemisphere poleward moving auroral forms (PMAFs) using optical data from the US Automatic Geophysical Observatory network in Antarctica. These Southern Hemisphere events are compared with Northern Hemisphere PMAFs, which have previously been observed during varied interplanetary magnetic field (IMF) configurations. The frequency of PMAF occurrence is studied as a function of IMF orientation and magnetic local time. Southern Hemisphere PMAFs are biased to Bz < 0 constituting 62 % of events, but are frequently observed during conditions of Bz> 0 constituting 38 % of events. Southern Hemisphere PMAFs share a similar IMF Bz dependence with Northern Hemisphere events [e.g., Fasel, 1995]. The primary modulator of PMAFs was found to be IMF By, which was negative for 81 % of events. Although the average background IMF was biased to By < 0, we find significant enhancement during By < 0 after this bias was removed. In a statistical study of Northern Hemisphere events, Fasel [1995] found 77 % of events occur during positive By. PMAFs appear to have an antisymmetric By dependence between hemispheres. We find By < 0 (By> 0) enhances the observation of PMAFs in the prenoon (postnoon) region, consistent with the release of magnetic stress. A morning bias of Southern Text Antarc* Antarctica Unknown |
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English |
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Hemisphere PMAFs is observed consistent with Northern Hemisphere events. INDEX |
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Hemisphere PMAFs is observed consistent with Northern Hemisphere events. INDEX E. E. Drury S. B. Mende H. U. Frey J. H. Doolittle Southern Hemisphere poleward moving auroral forms |
topic_facet |
Hemisphere PMAFs is observed consistent with Northern Hemisphere events. INDEX |
description |
[1] This paper presents a statistical study of Southern Hemisphere poleward moving auroral forms (PMAFs) using optical data from the US Automatic Geophysical Observatory network in Antarctica. These Southern Hemisphere events are compared with Northern Hemisphere PMAFs, which have previously been observed during varied interplanetary magnetic field (IMF) configurations. The frequency of PMAF occurrence is studied as a function of IMF orientation and magnetic local time. Southern Hemisphere PMAFs are biased to Bz < 0 constituting 62 % of events, but are frequently observed during conditions of Bz> 0 constituting 38 % of events. Southern Hemisphere PMAFs share a similar IMF Bz dependence with Northern Hemisphere events [e.g., Fasel, 1995]. The primary modulator of PMAFs was found to be IMF By, which was negative for 81 % of events. Although the average background IMF was biased to By < 0, we find significant enhancement during By < 0 after this bias was removed. In a statistical study of Northern Hemisphere events, Fasel [1995] found 77 % of events occur during positive By. PMAFs appear to have an antisymmetric By dependence between hemispheres. We find By < 0 (By> 0) enhances the observation of PMAFs in the prenoon (postnoon) region, consistent with the release of magnetic stress. A morning bias of Southern |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
E. E. Drury S. B. Mende H. U. Frey J. H. Doolittle |
author_facet |
E. E. Drury S. B. Mende H. U. Frey J. H. Doolittle |
author_sort |
E. E. Drury |
title |
Southern Hemisphere poleward moving auroral forms |
title_short |
Southern Hemisphere poleward moving auroral forms |
title_full |
Southern Hemisphere poleward moving auroral forms |
title_fullStr |
Southern Hemisphere poleward moving auroral forms |
title_full_unstemmed |
Southern Hemisphere poleward moving auroral forms |
title_sort |
southern hemisphere poleward moving auroral forms |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.550.9306 http://sprg.ssl.berkeley.edu/sprite/ago96/publication/2001JA007536.pdf |
genre |
Antarc* Antarctica |
genre_facet |
Antarc* Antarctica |
op_source |
http://sprg.ssl.berkeley.edu/sprite/ago96/publication/2001JA007536.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.550.9306 http://sprg.ssl.berkeley.edu/sprite/ago96/publication/2001JA007536.pdf |
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Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
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