Potential non-linearities in the high latitude circulation and ozone response to Stratospheric Aerosol Injection Journal Article uri icon



  • The impacts of Stratospheric Aerosol Injection (SAI) on the atmosphere; and surface climate depend on when and where the sulfate aerosol; precursors are injected, as well as on how much surface cooling is to be; achieved. We use a set of CESM2(WACCM6) SAI simulations achieving three; different levels of global mean surface cooling and demonstrate that; unlike some direct surface climate impacts driven by the reflection of; solar radiation by sulfate aerosols, the SAI-induced changes in the high; latitude circulation and ozone are more complex and could be non-linear.; This manifests in our simulations by disproportionally larger Antarctic; springtime ozone loss, significantly larger intra-ensemble spread of the; Arctic stratospheric jet and ozone responses, and non-linear impacts on; the extratropical modes of surface climate variability under the; strongest-cooling SAI scenario compared to the weakest one. These; potential non-linearities may add to uncertainties in projections of; regional surface impacts under SAI.

publication date

  • June 1, 2023

has restriction

  • green

Date in CU Experts

  • June 27, 2023 5:56 AM

Full Author List

  • Bednarz EM; Visioni D; Butler AH; Kravitz B; MacMartin DG; Tilmes S

author count

  • 6

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