Equatorial spread F‐related currents: Three‐dimensional simulations and observations
Equatorial spread F‐related currents: Three‐dimensional simulations and observations
复制标题
赤道扩散 F 相关电流：三维模拟和观测
DOI：
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发表时间：
2011
期刊：
影响因子：
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通讯作者：
H. Lühr
中科院分区：
文献类型：
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作者：
H. Aveiro;D. Hysell;J. Park;H. Lühr
描述了导致赤道扩展F（ESF）的日落后赤道F区电离层等离子体密度不规则性的三维数值模拟。模拟卫星通行证进行比较与CHAMP磁强计观测。的比较意味着，平行于主磁场的磁扰动主要是由于流动的外壁上的等离子体耗尽的抗磁电流。横向电流的发散产生了在耗尽区西（东）壁的外边缘上向极（向赤道）流动的场向电流，这在横向磁场分量中也是可以检测到的。这种模拟是静电的，这与对ESF中所有CHAMP磁场观测的Alfvénic解释相矛盾。
A three‐dimensional numerical simulation of plasma density irregularities in the postsunset equatorial F region ionosphere leading to equatorial spread F (ESF) is described. Simulated satellite passes are compared with CHAMP magnetometer observations. The comparisons imply that magnetic perturbations parallel to the main field are mainly due to diamagnetic currents flowing on the external walls of the plasma depletions. The divergence of the transverse currents generate field‐aligned currents flowing poleward (equatorward) on the external edges of the western (eastern) walls of the depletions which are furthermore detectable in the transverse magnetic field components. That the simulation is electrostatic argues against an Alfvénic interpretation of all of the CHAMP magnetic field observations in ESF.