Articles | Volume 17, issue 18
https://doi.org/10.5194/acp-17-11177-2017
© Author(s) 2017. This work is distributed under
the Creative Commons Attribution 3.0 License.
the Creative Commons Attribution 3.0 License.
https://doi.org/10.5194/acp-17-11177-2017
© Author(s) 2017. This work is distributed under
the Creative Commons Attribution 3.0 License.
the Creative Commons Attribution 3.0 License.
Research article
| 
21 Sep 2017
Research article |
| 21 Sep 2017
Shift of subtropical transport barriers explains observed hemispheric asymmetry of decadal trends of age of air
Gabriele P. Stiller
CORRESPONDING AUTHOR
Karlsruhe Institute of Technology, IMK, P.O. Box 3640, 76021 Karlsruhe, Germany
Federico Fierli
National Research Council, Institute for Atmospheric Sciences and Climate, Via Fosso del Cavaliere 100, 00199 Rome, Italy
Felix Ploeger
Institute for Energy and Climate Research – Stratosphere (IEK-7), Forschungszentrum Jülich, 52425 Jülich, Germany
Chiara Cagnazzo
National Research Council, Institute for Atmospheric Sciences and Climate, Via Fosso del Cavaliere 100, 00199 Rome, Italy
Bernd Funke
Instituto de Astrofísica de Andalucía (CSIC), Glorieta de la Astronomía s/n, 18008 Granada, Spain
Florian J. Haenel
Karlsruhe Institute of Technology, IMK, P.O. Box 3640, 76021 Karlsruhe, Germany
Thomas Reddmann
Karlsruhe Institute of Technology, IMK, P.O. Box 3640, 76021 Karlsruhe, Germany
Martin Riese
Institute for Energy and Climate Research – Stratosphere (IEK-7), Forschungszentrum Jülich, 52425 Jülich, Germany
Thomas von Clarmann
Karlsruhe Institute of Technology, IMK, P.O. Box 3640, 76021 Karlsruhe, Germany
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Latest update: 23 Nov 2024
Short summary
The discrepancy between modelled and observed 25-year trends of the strength of the stratospheric Brewer–Dobson circulation (BDC) is still not resolved. With our paper we trace the observed hemispheric dipole structure of age of air trends back to natural variability in shorter-term (decadal) time frames. Beyond this we demonstrate that after correction for the decadal natural variability the remaining trend for the first decade of the 21st century is consistent with model simulations.
The discrepancy between modelled and observed 25-year trends of the strength of the...
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