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ACP | Articles | Volume 19, issue 11
Atmos. Chem. Phys., 19, 7627–7647, 2019
https://doi.org/10.5194/acp-19-7627-2019
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.

Special issue: Chemistry–Climate Modelling Initiative (CCMI) (ACP/AMT/ESSD/GMD...

Atmos. Chem. Phys., 19, 7627–7647, 2019
https://doi.org/10.5194/acp-19-7627-2019
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.

Research article 07 Jun 2019

Research article | 07 Jun 2019

Extratropical age of air trends and causative factors in climate projection simulations

Petr Šácha et al.

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Cited articles

Abalos, M., Randel, W. J., Kinnison, D. E., and Garcia, R. R.: Using the Artificial Tracer e90 to Examine Present and Future UTLS Tracer Transport in WACCM, J. Atmos. Sci., 74, 3383–3403, https://doi.org/10.1175/JAS-D-17-0135.1, 2017. 
Andrews, D., Holton, J., and Leovy, C.: Middle Atmosphere Dynamics, Acad. Press, San Diego, 1987. 
Añel, J., A., Gimeno, L., de la Torre, L., and Nieto, R.: Changes in the tropopause height for the Eurasian region determined from CARDS radiosonde data, Naturwissenschaften, 93, 603–609, https://doi.org/10.1007/s00114-006-0147-5, 2006. 
Añel, J. A., de la Torre, L., and Gimeno, L.: On the Origin of the Air between Multiple Tropopauses at Midlatitudes, Sci. World J., 2012, 191028, https://doi.org/10.1100/2012/191028, 2012. 
Berger, U. and Lübken, F.-J.: Mesospheric temperature trends at mid-latitudes in summer, Geophys. Res. Lett., 38, L22804, https://doi.org/10.1029/2011GL049528, 2011. 
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Short summary
Climate models robustly project a Brewer–Dobson circulation (BDC) acceleration in the course of climate change. Analyzing mean age of stratospheric air (AoA) from a subset of climate projection simulations, we find a remarkable agreement in simulating the largest AoA trends in the extratropical stratosphere. This is shown to be related with the upward shift of the circulation, resulting in a so-called stratospheric shrinkage, which could be one of the so-far-omitted BDC acceleration drivers.
Climate models robustly project a Brewer–Dobson circulation (BDC) acceleration in the course of...
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