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Potential Non-Linearities in the High Latitude Circulation and Ozone Response to Stratospheric Aerosol Injection

Journal Article · · Geophysical Research Letters
DOI:https://doi.org/10.1029/2023gl104726· OSTI ID:2309678
 [1];  [2];  [3];  [4];  [5];  [6]
  1. Univ. of Colorado, Boulder, CO (United States). Cooperative Inst. for Research in Environmental Sciences (CIRES); National Oceanic and Atmospheric Administration (NOAA), Boulder, CO (United States). NOAA Chemical Sciences Laboratory (CSL); Cornell Univ., Ithaca, NY (United States)
  2. Cornell Univ., Ithaca, NY (United States); National Center for Atmospheric Research (NCAR), Boulder, CO (United States). Atmospheric Chemistry Observations and Modelling (ACOM)
  3. National Oceanic and Atmospheric Administration (NOAA), Boulder, CO (United States). NOAA Chemical Sciences Laboratory (CSL)
  4. Indiana Univ., Bloomington, IN (United States); Pacific Northwest National Laboratory (PNNL), Richland, WA (United States)
  5. Cornell Univ., Ithaca, NY (United States)
  6. National Center for Atmospheric Research (NCAR), Boulder, CO (United States). Atmospheric Chemistry Observations and Modelling (ACOM)
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.
Research Organization:
Pacific Northwest National Laboratory (PNNL), Richland, WA (United States)
Sponsoring Organization:
National Science Foundation (NSF); USDOE
Grant/Contract Number:
AC05-76RL01830
OSTI ID:
2309678
Report Number(s):
PNNL-SA--195035
Journal Information:
Geophysical Research Letters, Journal Name: Geophysical Research Letters Journal Issue: 22 Vol. 50; ISSN 0094-8276
Publisher:
American Geophysical Union (AGU)Copyright Statement
Country of Publication:
United States
Language:
English

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Data from: 'Potential non-linearities in the high latitude circulation and ozone response to Stratospheric Aerosol Injection' dataset January 2023
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