Cluster observations of reconnection due to the Kelvin-Helmholtz instability at the dawnside magnetospheric flank

被引：137
|
作者：
Nykyri, K. [1 ]
Otto, A.
Lavraud, B.
Mouikis, C.
Kistler, L. M.
Balogh, A.
Reme, H.
机构：
[1] Univ London Imperial Coll Sci Technol & Med, Blackett Lab, London SW7 2AZ, England
[2] Univ Alaska, Inst Geophys, Fairbanks, AK 99701 USA
[3] Los Alamos Natl Lab, Los Alamos, NM 87545 USA
[4] Univ New Hampshire, Durham, NH 03824 USA
[5] Ctr Etud Spatiale Rayonnements, Toulouse, France
来源：
ANNALES GEOPHYSICAE | 2006年 / 24卷 / 10期
关键词：
magnetospheric physics; magnetopause; cusp and boundary layers; plasma waves and instabilities; space plasma physics; magnetic reconnection transport processes; turbulence;
D O I：
10.5194/angeo-24-2619-2006
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
On 3 July 2001, the four Cluster satellites traversed along the dawnside magnetospheric flank and observed large variations in all plasma parameters. The estimated magnetopause boundary normals were oscillating in the z-direction and the normal component of the magnetic field showed systematic similar to 2-3 min bipolar variations for 1 h when the IMF had a small positive b(z)-component and a Parker-spiral orientation in the x, y-plane. Brief similar to 33 s intervals with excellent deHoffman Teller frames were observed satisfying the Walen relation. Detailed comparisons with 2D MHD simulations indicate that Cluster encountered rotational discontinuities generated by Kelvin-Helmholtz instability. We estimate a wave length of similar to 6 R(E) and a wave vector with a significant z-component.
引用
收藏
页码：2619 / 2643
页数：25
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