TY - JOUR
T1 - Ring current response to interplanetary magnetic cloud events
AU - Roeder, J. L.
AU - Fennell, J. F.
AU - Grande, M.
AU - Livi, S.
AU - Sheldon, R.
N1 - Funding Information:
Acknowled rnents We thank R. Leppinga nd K. Ogilvie of Goddard Space Flight 8 enter, for the use of unpublished Wind and IMP-8 data for this study. Work at Aerospace was supported in part by NASA contracts NAS5-30368 and NAGS2578.
Copyright:
Copyright 2004 Elsevier Science B.V., Amsterdam. All rights reserved.
PY - 1999
Y1 - 1999
N2 - Interplanetary magnetic clouds appear to have a wide range of ability to affect the magnetospheric energetic particle populations. This 'effectiveness' or lack thereof, shows up in both the electron and ion components of the radiation belts. The ring current ions are intensified and energised by the geomagnetic storm response to the cloud. The ion composition of the ring current may also change due to source variations in the solar wind and ionosphere. Seven of the magnetic cloud events during the first year of the GGS Polar mission are compared as to their effectiveness to change the intensity and composition of the ring current ion populations. Data from the CAMMICE MICS ion composition instrument on Polar are presented to quantify the ring current response to each event. The January 10, 1997 event was observed to have a relatively modest effect on the ring current. In contrast, the cloud that arrived on May 15, 1997 resulted in ring current ion energy density enhancements approximately one order of magnitude larger than the pre-storm values.
AB - Interplanetary magnetic clouds appear to have a wide range of ability to affect the magnetospheric energetic particle populations. This 'effectiveness' or lack thereof, shows up in both the electron and ion components of the radiation belts. The ring current ions are intensified and energised by the geomagnetic storm response to the cloud. The ion composition of the ring current may also change due to source variations in the solar wind and ionosphere. Seven of the magnetic cloud events during the first year of the GGS Polar mission are compared as to their effectiveness to change the intensity and composition of the ring current ion populations. Data from the CAMMICE MICS ion composition instrument on Polar are presented to quantify the ring current response to each event. The January 10, 1997 event was observed to have a relatively modest effect on the ring current. In contrast, the cloud that arrived on May 15, 1997 resulted in ring current ion energy density enhancements approximately one order of magnitude larger than the pre-storm values.
UR - http://www.scopus.com/inward/record.url?scp=0032770768&partnerID=8YFLogxK
U2 - 10.1016/S1464-1917(98)00012-9
DO - 10.1016/S1464-1917(98)00012-9
M3 - Article
AN - SCOPUS:0032770768
SN - 1464-1917
VL - 24
SP - 83
EP - 87
JO - Physics and Chemistry of the Earth, Part C: Solar, Terrestrial and Planetary Science
JF - Physics and Chemistry of the Earth, Part C: Solar, Terrestrial and Planetary Science
IS - 1-3
ER -