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首页> 外文期刊>Journal of Geophysical Research, A. Space Physics: JGR >Equatorial Nighttime Thermospheric Zonal Wind Jet Response to the Temporal Oscillation of Solar Wind
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Equatorial Nighttime Thermospheric Zonal Wind Jet Response to the Temporal Oscillation of Solar Wind

机译：赤道夜间Thermospheric纬向风的喷气机响应时间振荡的太阳能风

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摘要

This work investigates the response of the equatorial thermospheric wind jet to the temporal oscillation of the Bz component of the interplanetary magnetic field using Thermosphere Ionosphere Electrodynamics General Circulation Model simulations and CHAllenging Minisatellite Payload observations. The thermospheric wind jet is formed in the magnetic equatorial region with the strongest zonal winds. Both the morning westward jet and the nighttime eastward wind jet at the dip equator decrease during the oscillation periods of IMF Bz. Ion drag dominates the deceleration of the equatorial eastward wind jet in the nighttime, with a minor contribution from the viscous force. The relative motion between the ions and neutrals has a dominant influence on the ion drag at the 60-180°W and 107-180°E geographic longitude; at other longitudes, both relative velocity (Δvelocity) and electron density changes (ΔNe) are dominant. Moreover, the decrease in the equatorial eastward wind jet at 20 magnetic local time, which is also driven by ion drag, is significant above 270 km. The generation of the equatorial westward wind jet disturbance is significantly influenced by Δvelocity at all altitudes, whereas ΔNe becomes important below 450 km.
机译：这项工作调查的反应赤道风thermospheric喷射时间振荡的Bz组件使用热电离层行星际磁场电离层电动力学环流模型模拟和Minisatellite发起挑战有效载荷的观察。在磁赤道地区的形成最强的纬向风。向西和向东夜间风射流在磁赤道在减少振荡时间的国际货币基金组织(IMF)。赤道向东的减速飞机在夜间,与未成年人的贡献粘性力。离子和中性占主导地位影响离子在60 - 180°W和阻力107 - 180°E地理经度;经度,相对速度(Δ速度)和电子密度的变化(ΔNe)占主导地位。此外,减少在赤道向东风飞机在当地时间20磁性,这也是由离子拖动,显著高于270公里。西赤道风的一代飞机明显受到干扰Δ速度高度,而ΔNe重要的低于450公里。

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