Articles | Volume 14, issue 23
Atmos. Chem. Phys., 14, 13063–13079, 2014
https://doi.org/10.5194/acp-14-13063-2014
Atmos. Chem. Phys., 14, 13063–13079, 2014
https://doi.org/10.5194/acp-14-13063-2014

Research article 09 Dec 2014

Research article | 09 Dec 2014

The impact of volcanic aerosol on the Northern Hemisphere stratospheric polar vortex: mechanisms and sensitivity to forcing structure

M. Toohey et al.

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Short summary
Earth system model simulations are used to investigate the impact of volcanic aerosol forcing on stratospheric dynamics, e.g. the Northern Hemisphere (NH) polar vortex. We find that mechanisms linking aerosol heating and high-latitude dynamics are not as direct as often assumed; high-latitude effects result from changes in stratospheric circulation and related vertical motions. The simulated responses also show evidence of being sensitive to the structure of the volcanic forcing used.
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