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https://doi.org/10.5194/acp-2020-925
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/acp-2020-925
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.

  28 Sep 2020

28 Sep 2020

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This preprint is currently under review for the journal ACP.

The Impact of Increasing Stratospheric Radiative Damping on the QBO Period

Tiehan Zhou1,2, Kevin DallaSanta1,3, Larissa Nazarenko1,2, and Gavin A. Schmidt1 Tiehan Zhou et al.
  • 1NASA Goddard Institute for Space Studies, New York, NY, USA
  • 2Center for Climate Systems Research, Columbia University, New York, NY, USA
  • 3Universities Space Research Association, Columbia, MD, USA

Abstract. Stratospheric radiative damping increases as atmospheric carbon dioxide concentration rises. We use the one-dimensional mechanistic models of the QBO to conduct sensitivity experiments and find that when atmospheric carbon dioxide concentration increases, the simulated QBO period shortens due to the enhancing of radiative damping in the stratosphere. This result suggests that increasing stratospheric radiative damping due to rising CO2 may play a role in determining the QBO period in a warming climate along with wave momentum flux entering the stratosphere and tropical vertical residual velocity, both of which also respond to increasing CO2.

Tiehan Zhou et al.

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Short summary
Stratospheric radiative damping increases as atmospheric carbon dioxide concentration rises. We use the one-dimensional mechanistic models of the QBO to conduct sensitivity experiments and find that when CO2 increases, the simulated QBO period shortens due to the enhancing of radiative damping in the stratosphere. This result suggests that increasing stratospheric radiative damping due to rising CO2 may play a role in determining the QBO period in a warming climate.
Stratospheric radiative damping increases as atmospheric carbon dioxide concentration rises. We...
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