Global Modeling of Equatorial Spread F with SAMI3/WACCM‐X
Global Modeling of Equatorial Spread F with SAMI3/WACCM‐X
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DOI：
10.1029/2020gl088258
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发表时间：
2020-07
影响因子：
5.2
通讯作者：
J. Huba;H. Liu
中科院分区：
文献类型：
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作者：
J. Huba;H. Liu
我们报告了全球电离层/热层模拟研究的第一个结果，该研究自洽地在日落后电离层中产生大规模赤道扩展F（ESF）等离子体气泡。耦合模型包括电离层代码SAMI 3和大气/热层代码WACCM-X。两种情况下，模拟不同的季节和地球物理条件：3月的情况下（低太阳活动：F10.7 = 70）和7月的情况下（高太阳活动：F10.7 = 170）。我们发现，赤道等离子体气泡的形成和渗透到顶侧F层的三月的情况下，但不是七月的情况。对于3月的情况，一系列气泡在大西洋地区形成，其不规则间距在400- 1，200公里范围内，上升到800公里以上，并持续到午夜之后。这些结果与最近的GOLD观测结果一致。广义瑞利-泰勒不稳定性（GRTI）增长率的计算表明，3月的情况下e折叠时间比7月的情况短。
We report the first results of a global ionosphere/thermosphere simulation study that self‐consistently generates large‐scale equatorial spread F (ESF) plasma bubbles in the postsunset ionosphere. The coupled model comprises the ionospheric code SAMI3 and the atmosphere/thermosphere code WACCM‐X. Two cases are modeled for different seasons and geophysical conditions: the March case (low solar activity: F10.7 = 70) and the July case (high solar activity: F10.7 = 170). We find that equatorial plasma bubbles formed and penetrated into the topside F layer for the March case but not the July case. For the March case, a series of bubbles formed in the Atlantic sector with irregularity spacings in the range 400–1,200 km, rose to over 800 km, and persisted until after midnight. These results are consistent with recent GOLD observations. Calculation of the generalized Rayleigh‐Taylor instability (GRTI) growth rate shows that the e‐folding time was shorter for the March case than the July case.