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Rare observations of sprites and gravity waves supporting D, E, F-regions ionospheric coupling

Maurya, Ajeet K. and Pariha, Navin and Dube, Adarsh and Singh, Rajesh and Kumar, Sushil and Chanrion, Olivier and Tomicic, Maja and Neubert, Torsten (2022) Rare observations of sprites and gravity waves supporting D, E, F-regions ionospheric coupling. Scientific Reports - Nature, 12 (581). NA. ISSN 2045-2322

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We report rare simultaneous observations of columniform sprites and associated gravity waves (GWs) using the Transient Luminous Events (TLEs) camera and All-sky imager at Prayagraj (25.5° N, 81.9° E, geomag. lat. ~ 16.5° N), India. On 30 May 2014, a Mesoscale Convective System generated a group of sprites over the north horizon that reached the upper mesosphere. Just before this event, GWs (period ~ 14 min) were seen in OH broadband airglow (emission peak ~ 87 km) imaging that propagated in the direction of the sprite occurrence and dissipated in the background atmosphere thereby generating turbulence. About 9–14 min after the sprite event, another set of GWs (period ~ 11 min) was observed in OH imaging that arrived from the direction of the TLEs. At this site, we also record Very Low Frequency navigational transmitter signal JJI (22.2 kHz) from Japan. The amplitude of the JJI signal showed the presence of GWs with ~ 12.2 min periodicities and ~ 18 min period. The GWs of similar features were observed in the ionospheric Total Electron Content variations recorded at a nearby GPS site. The results presented here are important to understand the physical coupling of the troposphere with the lower and upper ionosphere through GWs.

Item Type: Journal Article
Subjects: Q Science > QC Physics
Divisions: School of Information Technology, Engineering, Mathematics and Physics (STEMP)
Depositing User: Ms Shalni Sanjana
Date Deposited: 20 Mar 2022 21:58
Last Modified: 22 Mar 2022 02:10

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