University of Leicester
Browse
Gunzkofer_et_al_AG_2023.pdf (17.4 MB)

Inferring neutral winds in the ionospheric transition region from atmospheric-gravity-wave traveling-ionospheric-disturbance (AGW-TID) observations with the EISCAT VHF radar and the Nordic Meteor Radar Cluster

Download (17.4 MB)
journal contribution
posted on 2024-01-25, 15:18 authored by F Günzkofer, D Pokhotelov, G Stober, I Mann, SL Vadas, E Becker, A Tjulin, A Kozlovsky, M Tsutsumi, N Gulbrandsen, S Nozawa, M Lester, E Belova, J Kero, NJ Mitchell, C Borries
Atmospheric gravity waves and traveling ionospheric disturbances can be observed in the neutral atmosphere and the ionosphere at a wide range of spatial and temporal scales. Especially at medium scales, these oscillations are often not resolved in general circulation models and are parameterized. We show that ionospheric disturbances forced by upward-propagating atmospheric gravity waves can be simultaneously observed with the EISCAT very high frequency incoherent scatter radar and the Nordic Meteor Radar Cluster. From combined multi-static measurements, both vertical and horizontal wave parameters can be determined by applying a specially developed Fourier filter analysis method. This method is demonstrated using the example of a strongly pronounced wave mode that occurred during the EISCAT experiment on 7 July 2020. Leveraging the developed technique, we show that the wave characteristics of traveling ionospheric disturbances are notably impacted by the fall transition of the mesosphere and lower thermosphere. We also demonstrate the application of using the determined wave parameters to infer the thermospheric neutral wind velocities. Applying the dissipative anelastic gravity wave dispersion relation, we obtain vertical wind profiles in the lower thermosphere.

History

Author affiliation

School of Physics & Astronomy, University of Leicester

Version

  • VoR (Version of Record)

Published in

Annales Geophysicae

Volume

41

Issue

2

Pagination

409 - 428

Publisher

Copernicus GmbH

issn

0992-7689

eissn

1432-0576

Copyright date

2023

Available date

2024-01-25

Language

en

Usage metrics

    University of Leicester Publications

    Categories

    Licence

    Exports

    RefWorks
    BibTeX
    Ref. manager
    Endnote
    DataCite
    NLM
    DC