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Direct injection of ionospheric O + into the dayside low latitude boundary layer
Author(s) -
Fuselier S. A.,
Klumpar D. M.,
Peterson W. K.,
Shelley E. G.
Publication year - 1989
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/gl016i010p01121
Subject(s) - magnetosphere , ionosphere , boundary layer , population , physics , geophysics , latitude , atmospheric sciences , interplanetary magnetic field , daytime , solar wind , magnetopause , plasma , astronomy , mechanics , demography , quantum mechanics , sociology
Observations from the AMPTE/Charge Composition Explorer (AMPTE/CCE) indicate the presence of two distinct O + populations in the dayside subsolar low latitude boundary layer during some periods of northward Interplanetary Magnetic Field (IMF). The first population is O + convected into the boundary layer from the outer magnetosphere and has been reported previously. It is suggested here that the new, second, O + population is injected into the dayside boundary layer directly from the high latitude ionosphere. This second population can have a significant density and distinct characteristics such as field‐aligned flow relative to boundary layer H + that modify both the plasma composition and dynamics in the low latitude boundary layer.