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The correlation between mid‐latitude trough and the plasmapause
Author(s) -
Yizengaw E.,
Wei H.,
Moldwin M. B.,
Galvan D.,
Mandrake L.,
Mannucci A.,
Pi X.
Publication year - 2005
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 - 10.1029/2005gl022954
Subject(s) - plasmasphere , trough (economics) , solstice , equinox , latitude , ionosphere , geology , middle latitudes , geophysics , geodesy , magnetosphere , atmospheric sciences , physics , magnetic field , quantum mechanics , economics , macroeconomics
We use simultaneous global observations of the mid‐latitude trough and the plasmapause to experimentally prove a long‐standing conjecture of magnetosphere‐ionosphere coupling‐ namely the mid‐latitude trough and plasmapause are on the same field line. Global Ionospheric Maps (GIM), generated using ground based GPS receivers, are used to detect the globally extended mid‐latitude trough; while global IMAGE EUV pictures are used to estimate the plasmapause position. Observations during the equinox and solstices and during quiet and disturbed periods are analyzed. In addition, positions of the mid‐latitude trough are calculated using a simple empirical model. The two independent observations (mid‐latitude trough and plasmapause positions) and an empirical model have been compared on a global scale and found to be in excellent agreement.