Articles | Volume 19, issue 1
Atmos. Chem. Phys., 19, 425–446, 2019
https://doi.org/10.5194/acp-19-425-2019

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

Atmos. Chem. Phys., 19, 425–446, 2019
https://doi.org/10.5194/acp-19-425-2019

Research article 11 Jan 2019

Research article | 11 Jan 2019

Structural changes in the shallow and transition branch of the Brewer–Dobson circulation induced by El Niño

Mohamadou Diallo et al.

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Short summary
This paper assesses the structural changes in the shallow and transition branches of the BDC induced by El Nino using the Lagrangian model simulations driven by ERAi and JRA-55 combined with MLS observations. We found a clear evidence of a weakening of the transition branch due to an upward shift in the dissipation height of the planetary and gravity waves and a strengthening of the shallow branch due to enhanced GW breaking in the tropics–subtropics and PW breaking at high latitudes.
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