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首页> 外文期刊>Journal of Geophysical Research, A. Space Physics: JGR >A Comparative Study of Ionospheric Day-To-Day Variability Over Wuhan Based on Ionosonde Measurements and Model Simulations
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A Comparative Study of Ionospheric Day-To-Day Variability Over Wuhan Based on Ionosonde Measurements and Model Simulations

机译：电离层日常的比较研究基于Ionosonde可变性在武汉测量和模型模拟

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摘要

Ionospheric day-to-day variability is essential for understanding the space environment, while it is still challenging to properly quantify and forecast. In the present work, the day-to-day variability of F2 layer peak electron densities (NmF2) is examined from both observational and modeling perspectives. Ionosonde data over Wuhan station (30.5°N, 114.5°E; 19.3°N magnetic latitude) are compared with simulations from the specific dynamics Whole Atmosphere Community Climate Model with thermosphere and ionosphere eXtension (SD-WACCM-X) and the Thermosphere-Ionosphere-Electrodynamics General Circulation Model (TIEGCM) in 2009 and 2012. Both SD-WACCM-X and TIEGCM are driven by the realistic 3 h geomagnetic index and daily solar input, and the former includes self-consistently solved physics and chemistry in the lower atmosphere. The correlation coefficient between observations and SD-WACCM-X simulations is much larger than that of the TIEGCM simulations, especially during dusk in 2009 and nighttime in 2012. Both the observed and SD-WACCM-X simulated day-to-day variability of NmF2 reveal a similar day-night dependence in 2012 that increases large during the nighttime and decreases during the daytime, and shows favorable consistency of daytime variability in 2009. Both the observations and SD-WACCM-X simulations also display semiannual variations in nighttime NmF2 variability, although the month with maximum variability is slightly different. However, TIEGCM does not reproduce the day-night dependence or the semiannual variations well. The results emphasize the necessity for realistic lower atmospheric perturbations to characterize ionospheric day-to-day variability. This work also provides a validation of the SD-WACCM-X in terms of ionospheric day-to-day variability.
机译：电离层的日常变化是至关重要的对于理解空间环境,而它仍然是适当的量化和挑战预测。可变性F2层峰电子密度(NmF2)从观察和检查建模透视图。站(30.5°N, 114.5°E;纬度)与模拟的特定的大气动力学整个社区气候模型和热大气层电离层(SD-WACCM-X)和扩展Thermosphere-Ionosphere-Electrodynamics一般循环模型(TIEGCM)在2009年和2012年。SD-WACCM-X TIEGCM是由现实的3 h地磁指数和日常太阳能输入,和前者包括自我一贯地解决在低层大气物理和化学。观测结果之间的相关系数和SD-WACCM-X模拟远远大于TIEGCM的模拟,特别是在黄昏在2009和2012年夜间。观察和SD-WACCM-X模拟日常可变性NmF2发现类似的昼夜2012年期间增加大的依赖夜间,减少在白天,白天的,显示了良好的一致性2009年可变性。SD-WACCM-X模拟也显示半年变化在夜间NmF2可变性,尽管本月最大的可变性略有不同。昼夜依赖或繁殖半年一次的变化。现实的必要性降低大气扰动描述电离层日常的可变性。验证SD-WACCM-X而言的电离层日常可变性。

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