Significant Contributions of Volcanic Aerosols to Decadal Changes in the Stratospheric Circulation

Abstract : The stratospheric circulation is an important element of climate as it determines the concentration of radiatively active species like water vapor and aerosol above the tropopause. Climate models predict that increasing greenhouse gas levels speed up the stratospheric circulation. However, these results have been challenged by observational estimates of the circulation strength, constituting an uncertainty in current climate simulations. Here, we quantify the effect of volcanic aerosol on the stratospheric circulation focusing on the Mount Pinatubo eruption and discussing further the minor extratropical volcanic eruptions after 2008. We show that the observed pattern of decadal circulation change over the past decades is substantially driven by volcanic aerosol injections. Thus, climate model simulations need to realistically take into account the effect of volcanic eruptions, including the minor eruptions after 2008, for a reliable reproduction of observed stratospheric circulation changes.
Complete list of metadatas

Cited literature [55 references]  Display  Hide  Download

https://hal-insu.archives-ouvertes.fr/insu-01629550
Contributor : Nathalie Pothier <>
Submitted on : Tuesday, November 14, 2017 - 1:32:09 PM
Last modification on : Thursday, July 25, 2019 - 4:16:03 PM
Long-term archiving on : Thursday, February 15, 2018 - 4:24:40 PM

File

Diallo_et_al-2017-Geophysical_...
Publication funded by an institution

Licence


Distributed under a Creative Commons Attribution - NonCommercial - NoDerivatives 4.0 International License

Identifiers

Citation

M. Diallo, F. Ploeger, P. Konopka, T. Birner, R. Müller, et al.. Significant Contributions of Volcanic Aerosols to Decadal Changes in the Stratospheric Circulation. Geophysical Research Letters, American Geophysical Union, 2017, 44 (20), pp.10,780-10,791. ⟨10.1002/2017GL074662⟩. ⟨insu-01629550v2⟩

Share

Metrics

Record views

3084

Files downloads

120