Millstone Hill观测到的一次电离层正暴相的模拟研究
Simulation Study of a Positive Ionospheric Storm Phase Observed at Millstone Hill
摘要：
NRL电离层模式SAMI 2的模拟结果表明，在2004年4月3日开始的磁暴期间，Millstone Hill上空F区的变化主要是由于长期持续的东向电场的影响，正如{ \it Huang et al.} [2005年]。模拟结果表明，与前一个平静日相比，F区电子密度峰值（NmF 2）增加了1/$\approx 2$，高度（hmF 2）升高了1/$\approx 80$ km，F区电子温度降低了1/$\approx 1000$ K。在进一步的模拟中，中性大气和风或电场被它们的安静日对应物所取代，这清楚地表明，电场在产生这些效应方面发挥了主导作用，尽管不是唯一的作用。
英文摘要：
Simulation results from the NRL ionospheric model SAMI2 indicate that the changes in the F-region over Millstone Hill during the geomagnetic storm beginning on 3 April 2004 are primarily due to the influence of a long-lasting eastward electric field, as was previously suggested by {\it Huang et al.} [2005]. A simulation of the storm day agrees well with the observational data and shows that, compared with the ionosphere of the previous quiet day, the peak electron density in the F-region (NmF2) increased by a factor of $\approx 2$, the altitude of the peak density (hmF2) rose by $\approx 80$ km, and the F-region electron temperature decreased by $\approx 1000$ K. Further simulations in which either the neutral atmosphere and winds or the electric field were replaced by their quiet day counterparts clearly suggest that the electric field played the dominant, although not exclusive, role in producing these effects.
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