Oxygen ion uplift and satellite drag effects during the 30 October 2003 daytime superfountain event
Oxygen ion uplift and satellite drag effects during the 30 October 2003 daytime superfountain event
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DOI：
10.5194/angeo-25-569-2007
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发表时间：
2007-03
影响因子：
1.9
通讯作者：
B. Tsurutani;O. Verkhoglyadova;A. Mannucci;T. Araki;A. Sato;T. Tsuda;K. Yumoto
中科院分区：
文献类型：
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作者：
B. Tsurutani;O. Verkhoglyadova;A. Mannucci;T. Araki;A. Sato;T. Tsuda;K. Yumoto
抽象的。对超级风暴前约 2 小时内行星际电场 (IEF) 迅速穿透白天低纬度电离层的情况进行了估计，并将其应用于 2003 年 10 月 30 日事件的修改后的 NRL SAMI2 代码。在我们的模拟中，日侧电离层 O+ 对流到更高海拔（约 600 公里）和更高纬度（约 ±25° 至 30°），形成高度移位的赤道电离层异常 (EIA) 峰值。该特征以及其他特征与之前发布的 CHAMP 电子 (TEC) 测量结果以及日边超级喷泉模型一致。由于离子中性阻力，O+ 离子的快速向上运动导致中性氧 (O) 上升。据估计，在约 400 公里海拔以上，位移 EIA 内的 O 密度可能会比安静时间值大幅增加。后一个特征将导致低空卫星的阻力增加。这种新预测的现象预计是超级风暴/IEF 事件的典型现象。
Abstract. The prompt penetration of interplanetary electric fields (IEFs) to the dayside low-latitude ionosphere during the first ~2 h of a superstorm is estimated and applied to a modified NRL SAMI2 code for the 30 October 2003 event. In our simulations, the dayside ionospheric O+ is convected to higher altitudes (~600 km) and higher latitudes (~±25° to 30°), forming highly displaced equatorial ionospheric anomaly (EIA) peaks. This feature plus others are consistent with previously published CHAMP electron (TEC) measurements and with the dayside superfountain model. The rapid upward motion of the O+ ions causes neutral oxygen (O) uplift due to ion-neutral drag. It is estimated that above ~400 km altitude the O densities within the displaced EIAs can be increased substantially over quiet time values. The latter feature will cause increased drag for low-altitude satellites. This newly predicted phenomenon is expected to be typical for superstorm/IEF events.