Explanation of the sporadic‐E layer formation by comparing FORMOSAT‐3/COSMIC data with meteor and wind shear information
Explanation of the sporadic‐E layer formation by comparing FORMOSAT‐3/COSMIC data with meteor and wind shear information
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DOI：
10.1002/2013jd020798
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发表时间：
2014-04
期刊：
影响因子：
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通讯作者：
W. Yeh;Jann‐Yenq Liu;Cheng-Yung Huang;Shih‐Ping Chen
中科院分区：
文献类型：
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作者：
W. Yeh;Jann‐Yenq Liu;Cheng-Yung Huang;Shih‐Ping Chen
零星E（Es）层的形成可以用几种不同的方式来解释，风切变理论和流星电离机制是最常用的解释。然而，无论是风切变理论还是流星电离机制都不能完全解释Es层的形成。流星电离机制不能解释该层在北方和南方半球的不同活动，风切变理论也不能解释Es层大量电离粒子的来源。在这项研究中，在Es层的活动进行了比较流星和电离粒子的全球垂直速度的信息。有关流星的信息来自国际流星组织和无线电流星观测公报。电离粒子的全球垂直速度信息是使用国际地磁参考场模型，水平风模型（HWM 07）和质谱仪-非相干散射模型计算的。Es层的活动是基于不规则度指数的值，该指数是从福尔摩沙卫星使命-3/气象、电离层和气候星座观测系统（FORMOSAT-3/COSMIC）全球定位系统无线电掩星使命获得的信噪比得出的。将风切变理论和流星电离机制结合起来，可以更全面地解释Es层电离粒子的来源和北方Es层活动的差异。
The formation of the sporadic E (Es) layer can be interpreted in several different ways, with wind shear theory and the meteor ionization mechanism being the most commonly used explanations. Nevertheless, neither the wind shear theory nor the meteor ionization mechanism alone can completely explain the formation of the Es layer. The meteor ionization mechanism cannot interpret the different activity in this layer between the Northern and Southern Hemispheres, while the wind shear theory cannot explain the source of the large amount of ionized particles in the Es layer. In this study, the activity in the Es layer is compared with information about meteors and the global vertical speed of ionized particles. The information about meteors is obtained from International Meteor Organization and Radio Meteor Observing Bulletin. The global vertical speed information for ionized particles is calculated using the International Geomagnetic Reference Field model, Horizontal Wind Model (HWM07), and Mass Spectrometer‐Incoherent Scatter model. The activity in the Es layer is based on the value of the irregular degree index, which is derived from the signal‐to‐noise ratio obtained from Formosa Satellite Mission‐3/Constellation Observing System for Meteorology, Ionosphere, and Climate (FORMOSAT‐3/COSMIC) Global Positioning System radio occultation mission. Taking both wind shear theory and the meteor ionization mechanism together, the source of the ionized particles in the Es layer and the difference in the activity in the Es layer between Northern and Southern Hemispheres can thus be explained more completely.