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The role of traveling planetary waves in ionosphere-atmosphere coupling during sudden stratospheric warmings

Yamazaki, Yosuke and Miyoshi, Yasunobu and Matthias, Vivien and Stolle, Claudia and Siddiqui, Tarique Adnan and Kervalishvili, Guram and Lastovicka, J. and Kozubek, Michal and Ward, William E. and Themens, David Russel and Kristoffersen, Samuel and Alken, Patrick (2020) The role of traveling planetary waves in ionosphere-atmosphere coupling during sudden stratospheric warmings. AGU Fall Meeting, 01.-17. Dez 2020, Online / San Francisco. (Unpublished)

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This study examines the role of traveling planetary waves in producing day-to-day variability of the ionosphere. Traveling planetary waves in the middle atmosphere, especially those having periods around 6, 10, 16 days, are generally regarded as the manifestation of atmospheric normal modes. A sudden stratospheric warming (SSW) is sometimes accompanied by enhanced traveling planetary waves, which can be understood in terms of the dependence of normal modes on the zonal mean state of the atmosphere. The September 2019 Antarctic SSW is one example. Following the SSW, a large quasi-6-day wave (Q6DW) is observed in the mesosphere and lower thermosphere. During the same time, Swarm satellites in near-polar orbits observe westward-propagating 6-day perturbations with zonal wavenumber 1 in ionospheric parameters such as the electron density and equatorial electrojet intensity. The whole atmosphere model GAIA is able to reproduce these ionospheric variations under constant geomagnetic and solar activity conditions. Using GAIA, it is demonstrated that tides modulated by the Q6DW are responsible for the 6-day ionospheric variations during the September 2019 SSW. Planetary wave modulations of tides and their ionospheric effects are also discussed for SSWs in other seasons.

Item URL in elib:https://elib.dlr.de/140501/
Document Type:Conference or Workshop Item (Speech)
Title:The role of traveling planetary waves in ionosphere-atmosphere coupling during sudden stratospheric warmings
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Yamazaki, YosukeHelmholtz Centre Potsdam GFZ German Research Centre for Geosciences, Potsdam, Germany,UNSPECIFIEDUNSPECIFIED
Miyoshi, YasunobuKyushu University, Fukuoka, JapanUNSPECIFIEDUNSPECIFIED
Matthias, VivienUNSPECIFIEDhttps://orcid.org/0000-0003-1806-4507UNSPECIFIED
Siddiqui, Tarique AdnanLeibniz Institute of Atmospheric Physics, Kühlungsborn, GermanyUNSPECIFIEDUNSPECIFIED
Kervalishvili, GuramGFZ German Research Centre for Geosciences, Potsdamhttps://orcid.org/0000-0001-8885-4198UNSPECIFIED
Kozubek, MichalInstitute of Atmospheric Physics CAS, PragueUNSPECIFIEDUNSPECIFIED
Ward, William E.University of New Brunswick, Fredericton, NB, Canada,UNSPECIFIEDUNSPECIFIED
Themens, David RusselUniversity of Birmingham, Birmingham, B15, United KingdomUNSPECIFIEDUNSPECIFIED
Kristoffersen, SamuelUniversity of New Brunswick, Fredericton, Canada,UNSPECIFIEDUNSPECIFIED
Alken, PatrickNational Centers for Environmental Information NOAA, Boulder, United StatesUNSPECIFIEDUNSPECIFIED
Date:December 2020
Refereed publication:No
Open Access:No
Gold Open Access:No
In ISI Web of Science:No
Keywords:SSW, Antartic, Q6DW, ionosphere
Event Title:AGU Fall Meeting
Event Location:Online / San Francisco
Event Type:international Conference
Event Dates:01.-17. Dez 2020
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Earth Observation
DLR - Research area:Raumfahrt
DLR - Program:R EO - Earth Observation
DLR - Research theme (Project):R - Atmospheric and climate research
Location: Neustrelitz
Institutes and Institutions:Institute for Solar-Terrestrial Physics > Solar-Terrestrial Coupling Processes
Deposited By: Wendt, Dr. Vivien
Deposited On:20 Jan 2021 14:18
Last Modified:20 Jan 2021 14:18

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