Articles | Volume 19, issue 19
https://doi.org/10.5194/acp-19-12607-2019
https://doi.org/10.5194/acp-19-12607-2019
Research article
 | 
09 Oct 2019
Research article |  | 09 Oct 2019

Evidence of small-scale quasi-isentropic mixing in ridges of extratropical baroclinic waves

Daniel Kunkel, Peter Hoor, Thorsten Kaluza, Jörn Ungermann, Björn Kluschat, Andreas Giez, Hans-Christoph Lachnitt, Martin Kaufmann, and Martin Riese

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Cited articles

Appenzeller, C., Davies, H. C., and Norton, W. A.: Fragmentation of stratospheric intrusions, J. Geophys. Res.-Atmos., 101, 1435–1456, https://doi.org/10.1029/95JD02674, 1996. a
Birner, T. and Bönisch, H.: Residual circulation trajectories and transit times into the extratropical lowermost stratosphere, Atmos. Chem. Phys., 11, 817–827, https://doi.org/10.5194/acp-11-817-2011, 2011. a
Birner, T., Dörnbrack, A., and Schumann, U.: How sharp is the tropopause at midlatitudes?, Geophys. Res. Lett., 29, 1–4, https://doi.org/10.1029/2002GL015142, 2002. a, b
Boothe, A. C. and Homeyer, C. R.: Global large-scale stratosphere–troposphere exchange in modern reanalyses, Atmos. Chem. Phys., 17, 5537–5559, https://doi.org/10.5194/acp-17-5537-2017, 2017. a, b
Bush, A. B. G. and Peltier, W. R.: Tropopause Folds and Synoptic-Scale Baroclinic Wave Life Cycles, J. Atmos. Sci., 51, 1581–1604, https://doi.org/10.1175/1520-0469(1994)051<1581:TFASSB>2.0.CO;2, 1994. a
Short summary
In this study we present a mixing process around the tropopause in extratropical baroclinic waves. We analyze airborne data from a flight during the WISE campaign in autumn 2017 over the North Atlantic. We use idealized experiments to study the mixing process. Although the process occurs on a small geographical scale, it might be of importance due to its relation to a frequent feature of the extratropical UTLS. The process is relevant for STE but is not fully included in climatologies.
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