Auroral precipitation/ion upwelling as a driver of neutral density enhancement in the cusp
Auroral precipitation/ion upwelling as a driver of neutral density enhancement in the cusp
复制标题
极光降水/离子上升流作为尖点中性密度增强的驱动因素
DOI:
10.1016/j.jastp.2012.03.003
复制
发表时间:
2012
影响因子:
1.9
通讯作者:
Lessard
中科院分区:
文献类型:
--
作者:
Sadler;Lessard
Soft electron precipitation in collaboration with ion upwelling is investigated as a possible driver of the cusp neutral density enhancement discovered by the CHAMP satellite. A time-dependent, three-fluid numerical model is used to simulate the vertical ionospheric and thermospheric response for this type of event. Particle data from the FAST satellite from a single favorable conjunction alignment event with CHAMP are input to the model. Results are given which suggest that altitude-dependent neutral density enhancements accompany ion upwelling that is driven by soft electron precipitation. The enhancement mechanism is summarized as follows. Sufficiently soft electron precipitation transfers energy to the ambient electron “gas”, which subsequently undergoes a thermal (upward) expansion. This establishes a vertical ambipolar electric field which pulls the ions upward. The momentum carried by up-flowing ions is significant and results show it to be capable of dragging neutral gas upward to create density structures above the F-region.
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影响因子:
2.4
作者:
S. A. Zaitzeva;M. I. Pudovkin
通讯作者:
M. I. Pudovkin
DOI:
10.1016/0021-9169(95)00166-2
发表时间:
1996
影响因子:
1.9
作者:
J. Schoendorf;G. Crowley;R. Roble
通讯作者:
R. Roble
影响因子:
--
作者:
G. W. Prölss
通讯作者:
G. W. Prölss
影响因子:
5.2
作者:
Geoff Crowley;D. Knipp;K. A. Drake;J. Lei;Eric K. Sutton;H. Lühr
通讯作者:
Geoff Crowley;D. Knipp;K. A. Drake;J. Lei;Eric K. Sutton;H. Lühr
影响因子:
5.2
作者:
W. Miyake;T. Mukai;N. Kaya;H. Fukunishi
通讯作者:
H. Fukunishi