Evidence for simultaneous occurrence of periodic and single dark band MSTIDs over geomagnetic low-mid latitude transition region. (April 2021)

• Record Type: Journal Article
• Authors: Rathi, R.; Yadav, V.; Mondal, S.; Sarkhel, S.; Krishna, M. V. Sunil; Upadhayaya, A.K.
• Is Part Of: Journal of atmospheric and solar-terrestrial physics. Volume 215(2021)
• Publication Date: 2021-04
• Subjects: Medium scale travelling ionospheric disturbances (MSTIDs) -- O(1D) 630.0 nm Airglow emission -- Perkins instability -- E-F Coupling; Geophysics -- Periodicals; Atmospheric physics -- Periodicals; Géophysique -- Périodiques; Météorologie physique -- Périodiques; Electronic journals; 551.51
• DOI: 10.1016/j.jastp.2021.105588
• Languages: English
• ISSNs: 1364-6826

Abstract

Abstract: We report a unique simultaneous occurrence of two plasma structures using a 630.0 nm all-sky airglow imager in Hanle, India. The characteristics indicate that the observed structures are Medium Scale Travelling Ionospheric Disturbances (MSTIDs) of different types, namely periodic and single dark band. Based on previous understandings of Perkins instability, we explore the role of polarization electric field within MSTIDs using complementary observations from a nearby digisonde. We propose that the MSTIDs involve different seeding processes. This study provides crucial information in elucidating the generation of MSTIDs and helps in understanding the F-region electrodynamics over geomagnetic low-mid latitude transition region. Highlights: Simultaneous observation of periodic MSTID and single dark band MSTID. Both the MSTIDs are generated by Perkins instability through different seeding mechanisms. The polarization electric field associated with the single dark band MSTID is stronger than that for the periodic MSTID.