Flow Channels and the Generation of Alfvénic Turbulence Along Storm‐Time Inner Magnetospheric Field‐Lines
Flow Channels and the Generation of Alfvénic Turbulence Along Storm‐Time Inner Magnetospheric Field‐Lines
复制标题
流动通道和沿风暴-时间内磁层场-线的阿尔芬湍流的产生
DOI:
10.1029/2022gl101321
复制
发表时间:
2022
影响因子:
5.2
通讯作者:
Chaston, Christopher C.
中科院分区:
文献类型:
--
作者:
Chaston, Christopher C.
A feature of Earth's storm‐time magnetosphere outside the plasmapause is the occurrence of broad‐spectrum Alfvénic fluctuations. In this letter observations from the Van Allen Probes are compared with 3‐D fluid‐kinetic simulations of an evolving convective flow channel to investigate the mechanisms generating the observed spectrum. It is shown how narrow channels of fast convection are unstable to the Kelvin‐Helmholtz instability which on closed field‐lines initiates a cascade to small scales. Sustained driving of the flow combined with reflection from the topside ionosphere leads to the generation of an intensified spectrum of electromagnetic structures having similar spectral and morphological characteristics to those observed. This process couples enhanced magnetospheric convection to kinetic scale electromagnetic fluctuations that drive particle transport, scattering and energization through the outer radiation belt and ring current during geomagnetic storms.
登录
查看更多内容
影响因子:
5.2
作者:
C. Chaston;J. Bonnell;J. Wygant;F. Mozer;S. Bale;K. Kersten;A. Breneman;C. Kletzing;W. Kurth;G. Hospodarsky;Charles W. Smith;E. MacDonald
通讯作者:
C. Chaston;J. Bonnell;J. Wygant;F. Mozer;S. Bale;K. Kersten;A. Breneman;C. Kletzing;W. Kurth;G. Hospodarsky;Charles W. Smith;E. MacDonald
影响因子:
5.2
作者:
C. Chaston;J. Bonnell;A. Halford;G. Reeves;D. Baker;C. Kletzing;J. Wygant
通讯作者:
J. Wygant
影响因子:
5.2
作者:
C. Chaston;J. Bonnell;J. Wygant;Geoff D. Reeves;D. N. Baker
通讯作者:
D. N. Baker
影响因子:
--
作者:
R. Rankin;B. Harrold;J. Samson;P. Frycz
通讯作者:
P. Frycz
影响因子:
5.2
作者:
C. Seyler;T. Xu
通讯作者:
T. Xu