Ground observations of magnetospheric boundary layer phenomena
Several classes of traveling vortices in the dayside ionosphere convection have been detected and tracked using the Greenland magnetometer chain (Friis-Christensen et al., 1988, McHenry et al., 1989). One class observed during quiet times consists of a continuous series of vortices moving generally...
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ftnasantrs:oai:casi.ntrs.nasa.gov:19900063369 2023-05-15T16:28:53+02:00 Ground observations of magnetospheric boundary layer phenomena Mchenry, Mark A. Clauer, C. Robert Friis-Christensen, Eigil Newell, Patrick T. Kelly, J. D. Unclassified, Unlimited, Publicly available Sep 1, 1990 http://ntrs.nasa.gov/search.jsp?R=19900063369 unknown http://ntrs.nasa.gov/search.jsp?R=19900063369 Accession ID: 90A50424 Copyright Other Sources 46 Journal of Geophysical Research; 95; 14995-15 1990 ftnasantrs 2012-02-15T18:35:35Z Several classes of traveling vortices in the dayside ionosphere convection have been detected and tracked using the Greenland magnetometer chain (Friis-Christensen et al., 1988, McHenry et al., 1989). One class observed during quiet times consists of a continuous series of vortices moving generally antisunward for several hours at a time. The vortices' strength is seen to be approximately steady and neighboring vortices rotate in opposite directions. Sondrestrom radar observations show that the vortices are located at the ionospheric convection reversal boundary. Low altitude DMSP observations indicate the vortices are on field lines which map to the inner edge of the low latitude boundary layer. Because the vortices are conjugate to the boundary layer, repeat in a regular fashion and travel antisunward, it is argued that this class of vortices is caused by the Kelvin-Helmholtz instability of the inner edge of the magnetospheric boundary layer. Other/Unknown Material Greenland NASA Technical Reports Server (NTRS) Greenland Christensen ENVELOPE(47.867,47.867,-67.967,-67.967) |
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NASA Technical Reports Server (NTRS) |
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46 Mchenry, Mark A. Clauer, C. Robert Friis-Christensen, Eigil Newell, Patrick T. Kelly, J. D. Ground observations of magnetospheric boundary layer phenomena |
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46 |
description |
Several classes of traveling vortices in the dayside ionosphere convection have been detected and tracked using the Greenland magnetometer chain (Friis-Christensen et al., 1988, McHenry et al., 1989). One class observed during quiet times consists of a continuous series of vortices moving generally antisunward for several hours at a time. The vortices' strength is seen to be approximately steady and neighboring vortices rotate in opposite directions. Sondrestrom radar observations show that the vortices are located at the ionospheric convection reversal boundary. Low altitude DMSP observations indicate the vortices are on field lines which map to the inner edge of the low latitude boundary layer. Because the vortices are conjugate to the boundary layer, repeat in a regular fashion and travel antisunward, it is argued that this class of vortices is caused by the Kelvin-Helmholtz instability of the inner edge of the magnetospheric boundary layer. |
format |
Other/Unknown Material |
author |
Mchenry, Mark A. Clauer, C. Robert Friis-Christensen, Eigil Newell, Patrick T. Kelly, J. D. |
author_facet |
Mchenry, Mark A. Clauer, C. Robert Friis-Christensen, Eigil Newell, Patrick T. Kelly, J. D. |
author_sort |
Mchenry, Mark A. |
title |
Ground observations of magnetospheric boundary layer phenomena |
title_short |
Ground observations of magnetospheric boundary layer phenomena |
title_full |
Ground observations of magnetospheric boundary layer phenomena |
title_fullStr |
Ground observations of magnetospheric boundary layer phenomena |
title_full_unstemmed |
Ground observations of magnetospheric boundary layer phenomena |
title_sort |
ground observations of magnetospheric boundary layer phenomena |
publishDate |
1990 |
url |
http://ntrs.nasa.gov/search.jsp?R=19900063369 |
op_coverage |
Unclassified, Unlimited, Publicly available |
long_lat |
ENVELOPE(47.867,47.867,-67.967,-67.967) |
geographic |
Greenland Christensen |
geographic_facet |
Greenland Christensen |
genre |
Greenland |
genre_facet |
Greenland |
op_source |
Other Sources |
op_relation |
http://ntrs.nasa.gov/search.jsp?R=19900063369 Accession ID: 90A50424 |
op_rights |
Copyright |
_version_ |
1766018566032719872 |