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Magnetic field maxima in the low latitude boundary layer
Author(s) -
Sonnerup B.,
Paschmann G.,
Phan T. D.,
Lühr H.
Publication year - 1992
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/92gl01809
Subject(s) - magnetopause , geophysics , physics , boundary layer , latitude , magnetosphere , field (mathematics) , population , magnetosheath , maxima , curvature , magnetic field , computational physics , field line , atmospheric sciences , geology , geometry , mechanics , astronomy , art , demography , mathematics , quantum mechanics , sociology , performance art , pure mathematics , art history
The magnetic field often exhibits a maximum in the Earth's low‐latitude boundary layer. We show examples of this behavior, using data from the AMPTE/IRM spacecraft, and argue that two fundamentally distinct causes exist for the excess field: (i) a depression, within the layer, of the population of medium‐energy ions of magnetospheric origin; (ii) field curvature effects associated with undulations of the magnetopause itself.