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ACP | Articles | Volume 18, issue 17
Atmos. Chem. Phys., 18, 12639–12661, 2018
https://doi.org/10.5194/acp-18-12639-2018
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.
Atmos. Chem. Phys., 18, 12639–12661, 2018
https://doi.org/10.5194/acp-18-12639-2018
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.

Research article 31 Aug 2018

Research article | 31 Aug 2018

Detection of a climatological short break in the polar night jet in early winter and its relation to cooling over Siberia

Yuta Ando et al.

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Subject: Dynamics | Research Activity: Atmospheric Modelling | Altitude Range: Stratosphere | Science Focus: Physics (physical properties and processes)
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Cited articles

Ambaum, M. H. P. and Hoskins, B. J.: The NAO troposphere-stratosphere connection, J. Climate, 15, 1969–1978, https://doi.org/10.1175/1520-0442(2002)015<1969:TNTSC>2.0.CO;2, 2002. 
AMS: Polar vortex, Glossary of Meteorology, available at: http://glossary.ametsoc.org/wiki/polar_vortex (ast access: 20 August 2018), 2015. 
Ando, Y., Ogi, M., and Tachibana, Y.: Abnormal Winter Weather in Japan during 2012 Controlled by Large-Scale Atmospheric and Small-Scale Oceanic Phenomena, Mon. Weather Rev., 143, 54–63, https://doi.org/10.1175/MWR-D-14-00032.1, 2015. 
Andrews, D. G. and McIntyre, M. E.: Planetary Waves in Horizontal and Vertical Shear: The Generalized Eliassen–Palm Relation and the Mean Zonal Acceleration, J. Atmos. Sci., 33, 2031–2048, https://doi.org/10.1175/1520-0469(1976)033<2031:PWIHAV>2.0.CO;2, 1976. 
Andrews, D. G., Holton, J. R., and Leovy, C. B.: Middle Atmosphere Dynamics, Academic Press, San Diego, CA, USA, 1987. 
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We found the climatological strong stratospheric westerly circumpolar wind stops increasing temporarily during November, when the upward propagation of large-scale atmospheric waves from the troposphere increases. The propagation of atmospheric waves, which is strongest over Siberia, is related to strengthening of the low pressure. Longitudinally asymmetric forcing by land–sea heating contrasts caused by their different heat capacities might cause the strengthening of the low pressure.
We found the climatological strong stratospheric westerly circumpolar wind stops increasing...
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