Formation of ionospheric sporadic E layers by atmospheric gravity waves

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Goderdzi G. Didebulidze
Giorgi Dalakishvili
Levan Lomidze
Giorgi Matiashvili

Abstract

In this work the formation of mid-latitude sporadic E (Es) layer under the influence of atmospheric gravity waves (AGWs) evolving in the horizontal shear flow is studied. AGWs can be excited in the background horizontal wind with a linear horizontal shear (horizontal shear flow). These in-situ excited atmospheric waves, which act on metallic ions through ion-neutral collisions and Lorentz forcing, influence the ion vertical motion and can lead to their convergence into thin horizontal layers. The formation of sporadic E is investigated using a numerical model in two-dimensional case and temporal evolution of multi-layered sporadic E is demonstrated. The ion/electron density of Es layers depends on the amplitude of AGWs and spatial location of the layers is determined by the vertical wavelength of atmospheric gravity waves.
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Published: Mar 31, 2015

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Didebulidze, G. G., Dalakishvili, G., Lomidze, L., & Matiashvili, G. (2015). Formation of ionospheric sporadic E layers by atmospheric gravity waves. Journals of Georgian Geophysical Society, 17(C). Retrieved from https://ggs.openjournals.ge/index.php/GGS/article/view/1646
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Vol. 17: PHYSICS OF ATMOSPHERE, OCEAN AND SPACE PLASMA
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