Research output: Contribution to Journal/Magazine › Journal article › peer-review
Research output: Contribution to Journal/Magazine › Journal article › peer-review
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TY - JOUR
T1 - The changing topology of the duskside low-latitude boundary layer in relation to IMF orientation
AU - Lund, E.
AU - Farrugia, C. J.
AU - Sandholt, P. E.
AU - Kistler, L. M.
AU - Fairfield, D. H.
AU - Gratton, F. T.
AU - Cowley, S. W. H.
AU - Wild, J. A.
AU - Mouikis, C. G.
AU - Dunlop, M. W.
AU - Rème, H.
AU - Carlson, C. W.
PY - 2006
Y1 - 2006
N2 - On 7 December 2000, Cluster made an extended outbound radial traversal of the duskside magnetopause boundary layer. The long duration of the crossing, during which Cluster spent several hours within 2RE of the nominal magnetopause, allows us to deconvolve the structure of this boundary layer in its dependence on interplanetary parameters. We present evidence that as the interplanetary magnetic field (IMF) changed in discontinuous jumps from southward to northward, the magnetic topology of the boundary layer evolved from open to closed. Reconnection signatures, including enhanced flows observed locally at Cluster and ion energy dispersion signatures observed by FAST near ClusterÕs magnetic footpoint, appeared while the IMF was southward. When the IMF turned nearly due northward, Cluster observed 75-s (Pc 4) oscillations which we attribute to the Kelvin–Helmholtz instability.
AB - On 7 December 2000, Cluster made an extended outbound radial traversal of the duskside magnetopause boundary layer. The long duration of the crossing, during which Cluster spent several hours within 2RE of the nominal magnetopause, allows us to deconvolve the structure of this boundary layer in its dependence on interplanetary parameters. We present evidence that as the interplanetary magnetic field (IMF) changed in discontinuous jumps from southward to northward, the magnetic topology of the boundary layer evolved from open to closed. Reconnection signatures, including enhanced flows observed locally at Cluster and ion energy dispersion signatures observed by FAST near ClusterÕs magnetic footpoint, appeared while the IMF was southward. When the IMF turned nearly due northward, Cluster observed 75-s (Pc 4) oscillations which we attribute to the Kelvin–Helmholtz instability.
KW - Cluster
KW - reconnection DCS-publications-id
KW - art-751
KW - DCS-publications-credits
KW - iono
KW - DCS-publications-personnel-id
KW - 104
U2 - 10.1016/j.asr.2004.11.035
DO - 10.1016/j.asr.2004.11.035
M3 - Journal article
VL - 37
SP - 497
EP - 500
JO - Advances in Space Research
JF - Advances in Space Research
SN - 0273-1177
IS - 3
ER -