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ANGEO | Articles | Volume 37, issue 4
Ann. Geophys., 37, 507–523, 2019
https://doi.org/10.5194/angeo-37-507-2019
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.

Special issue: Vertical coupling in the atmosphere–ionosphere system

Ann. Geophys., 37, 507–523, 2019
https://doi.org/10.5194/angeo-37-507-2019
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.

Regular paper 03 Jul 2019

Regular paper | 03 Jul 2019

Effect of latitudinally displaced gravity wave forcing in the lower stratosphere on the polar vortex stability

Nadja Samtleben et al.

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Revised manuscript under review for GMD
Short summary
Impact of local gravity wave forcing in the lower stratosphere on the polar vortex stability: effect of longitudinal displacement
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Cited articles

Albers, J. R. and Birner, T.: Vortex Preconditioning due to Planetary and Gravity Waves prior to Sudden Stratospheric Warmings, J. Atmos. Sci., 71, 4028–4054, https://doi.org/10.1175/JAS-D-14-0026.1, 2014. a, b, c
Alexander, P., Luna, D., Llamedo, P., and de la Torre, A.: A gravity waves study close to the Andes mountains in Patagonia and Antarctica with GPS radio occultation observations, Ann. Geophys., 28, 587–595, https://doi.org/10.5194/angeo-28-587-2010, 2010. a
Andrews, D. G., Holton, J. R., and Leovy, C. B.: Middle Atmosphere Dynamics, ISBN 0-12-058576-6, Academic Press, San Diego, 1987. a
Baldwin, M. P. and Holton, J. R.: Climatology of the stratospheric polar vortex and planetary wave breaking, J. Atmos. Sci., 45, 1123–1142, https://doi.org/10.1175/1520-0469(1988)045<1123:COTSPV>2.0.CO;2, 1988. a
Charney, J. G. and Drazin, P. G.: Propagation of planetary-scale disturbances from the lower into the upper atmosphere, J. Geophys. Res., 66, 83–109, https://doi.org/10.1029/JZ066i001p00083, 1961. a
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Simulations of locally breaking gravity wave hot spots in the stratosphere show a suppression of wave propagation at midlatitudes, which is partly compensated for by additional wave propagation through the polar region. This leads to a displacement of the polar vortex towards lower latitudes. The effect is highly dependent on the position of the artificial gravity wave forcing. It is strongest (weakest) for hot spots at lower to middle latitudes (higher latitudes).
Simulations of locally breaking gravity wave hot spots in the stratosphere show a suppression of...
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