September 2019 Antarctic Sudden Stratospheric Warming: Quasi‐6‐Day Wave Burst 
and Ionospheric Effects

Yamazaki, Yosuke; Matthias, V.; Miyoshi, Y.; Stolle, Claudia; Siddiqui, T.; Kervalishvili, G.; Laštovička, J.; Kozubek, M.; Ward, W.; Themens, D. R.; Kristoffersen, S.; Alken, P.

doi:10.1029/2019GL086577

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Journal Article

September 2019 Antarctic Sudden Stratospheric Warming: Quasi‐6‐Day Wave Burst and Ionospheric Effects

Authors

/persons/resource/yamazaki

Yamazaki, Yosuke
2.3 Geomagnetism, 2.0 Geophysics, Departments, GFZ Publication Database, Deutsches GeoForschungsZentrum;

Matthias, V.
External Organizations;

Miyoshi, Y.
External Organizations;

/persons/resource/cstolle

Stolle, Claudia
2.3 Geomagnetism, 2.0 Geophysics, Departments, GFZ Publication Database, Deutsches GeoForschungsZentrum;

/persons/resource/tariq

Siddiqui, T.
2.3 Geomagnetism, 2.0 Geophysics, Departments, GFZ Publication Database, Deutsches GeoForschungsZentrum;

/persons/resource/gmk

Kervalishvili, G.
2.3 Geomagnetism, 2.0 Geophysics, Departments, GFZ Publication Database, Deutsches GeoForschungsZentrum;

Laštovička, J.
External Organizations;

Kozubek, M.
External Organizations;

Ward, W.
External Organizations;

Themens, D. R.
External Organizations;

Kristoffersen, S.
External Organizations;

Alken, P.
External Organizations;

External Ressource

https://www.essoar.org/doi/10.1002/essoar.10501316.1
(Preprint)

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5000017.pdf
(Publisher version), 3MB

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Citation

Yamazaki, Y., Matthias, V., Miyoshi, Y., Stolle, C., Siddiqui, T., Kervalishvili, G., Laštovička, J., Kozubek, M., Ward, W., Themens, D. R., Kristoffersen, S., Alken, P. (2020): September 2019 Antarctic Sudden Stratospheric Warming: Quasi‐6‐Day Wave Burst and Ionospheric Effects. - Geophysical Research Letters, 47, 1, e2019GL086577.
https://doi.org/10.1029/2019GL086577

Cite as: https://gfzpublic.gfz-potsdam.de/pubman/item/item_5000017

Abstract

An exceptionally strong stationary planetary wave with Zonal Wavenumber 1 led to a sudden stratospheric warming (SSW) in the Southern Hemisphere in September 2019. Ionospheric data from European Space Agency's Swarm satellite constellation mission show prominent 6‐day variations in the dayside low‐latitude region at this time, which can be attributed to forcing from the middle atmosphere by the Rossby normal mode “quasi‐6‐day wave” (Q6DW). Geopotential height measurements by the Microwave Limb Sounder aboard National Aeronautics and Space Administration's Aura satellite reveal a burst of global Q6DW activity in the mesosphere and lower thermosphere during the SSW, which is one of the strongest in the record. The Q6DW is apparently generated in the polar stratosphere at 30–40 km, where the atmosphere is unstable due to strong vertical wind shear connected with planetary wave breaking. These results suggest that an Antarctic SSW can lead to ionospheric variability through wave forcing from the middle atmosphere.