Articles | Volume 21, issue 11
Atmos. Chem. Phys., 21, 8393–8412, 2021
https://doi.org/10.5194/acp-21-8393-2021

Special issue: The SPARC Reanalysis Intercomparison Project (S-RIP) (ACP/ESSD...

Atmos. Chem. Phys., 21, 8393–8412, 2021
https://doi.org/10.5194/acp-21-8393-2021
Research article
02 Jun 2021
Research article | 02 Jun 2021

The stratospheric Brewer–Dobson circulation inferred from age of air in the ERA5 reanalysis

Felix Ploeger et al.

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Latest update: 08 Aug 2022
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Short summary
We investigate the global stratospheric circulation (Brewer–Dobson circulation) in the new ECMWF ERA5 reanalysis based on age of air simulations, and we compare it to results from the preceding ERA-Interim reanalysis. Our results show a slower stratospheric circulation and higher age for ERA5. The age of air trend in ERA5 over the 1989–2018 period is negative throughout the stratosphere, related to multi-annual variability and a potential contribution from changes in the reanalysis system.
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