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Comment on 'Mapping the dayside ionosphere to the magnetosphere according to particle precipitation characteristics' by Newell and MengNewell and Meng (1992) present maps of the occurrence probability of various classifications of particle precipitation as seen in the dayside topside ionosphere. It is argued that these are maps of the magnetospheric regions, a contention with which their critics disagree. The latter conclude that, because of convection, any one population of particles seen at low altitudes will have originated from a wide variety of locations, and particle characteristics cannot be mapped back to those in the magnetosphere without detailed knowledge of both the convection and magnetic field. Steplike boundaries between the regions will arise from nonsteady-state conditions and cannot be envisaged as steady-state magnetospheric boundaries between two plasma populations. In their reply Newell and Meng contend that convection does not move plasma from the LLBL into the cusp. Most of the LLBL plasma comes from the magnetosheath, so the direction of plasma transfer is in the other direction.
Document ID
19930072247
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Lockwood, M.
(Rutherford Appleton Lab. Didcot, United Kingdom)
Smith, M. F.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Date Acquired
August 16, 2013
Publication Date
August 20, 1993
Publication Information
Publication: Geophysical Research Letters
Volume: 20
Issue: 16
ISSN: 0094-8276
Subject Category
Geophysics
Accession Number
93A56244
Distribution Limits
Public
Copyright
Other

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