Articles | Volume 19, issue 11
Atmos. Chem. Phys., 19, 7627–7647, 2019

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

Atmos. Chem. Phys., 19, 7627–7647, 2019

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,, 2017. 
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The requested paper has a corresponding corrigendum published. Please read the corrigendum first before downloading the article.

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.
Final-revised paper