The deadline to submit a session, town hall, or pre-conference workshop proposal for AGU25 has passed. Please search for and review proposed sessions below. Please note this site is frozen as of 4/29/25 and will not reflect any changes to proposals made after this date.


Conveners will be contacted by the AGU25 Program Committee with any requests for mergers or edits to proposals. Conveners will be notified of the acceptance of their proposal in mid-June.


Abstract submissions will also open in mid-June and the deadline for abstract submissions is 30 July, 2025.


Please visit the AGU25 website for more information or please contact AGU with any questions.

Session Proposal: Stratospheric aerosol injection: assessing potential harms from limited deployment (AGU25)

GC098
Stratospheric aerosol injection: assessing potential harms from limited deployment

Session ID#: 252168

Session Description:
Stratospheric aerosol injection (SAI) of sulfate aerosols is the only form of solar radiation management that could potentially be deployed cost-effectively at scale. Doing so might temporarily reduce global warming to buy time for the global economy to decarbonize and carbon dioxide removal technologies to mature. Model simulations mostly indicate large net benefits from limited SAI deployment. However, these models may neglect or underestimate harms to humans or ecosystems via many physical and biogeochemical processes, such as altered precipitation patterns, increased sulfur pollution, or decreased crop yields. Potential harms are uncertain and possibly substantial. We solicit contributions working towards constraining the likelihood or magnitude of potential harms arising from a hemispherically-balanced SAI deployment offsetting less than half of radiative forcing. This could include model simulations, analysis of aerosol or other historical observations, or any research motivated by the eventual goal of quantitative cost-benefit comparison of SAI to inform international policy.
Co-Sponsor(s):
  • A - Atmospheric Sciences
Index Terms:

1610 Atmosphere [GLOBAL CHANGE]
1630 Impacts of global change [GLOBAL CHANGE]
3311 Clouds and aerosols [ATMOSPHERIC PROCESSES]
3363 Stratospheric dynamics [ATMOSPHERIC PROCESSES]
Primary Convener:  B. B. Cael, University of Chicago, Department of the Geophysical Sciences, Chicago, United States
Conveners:  David Keith, University of Chicago, Department of the Geophysical Sciences, Chicago, United States and Ken Caldeira, Gates Ventures, Kirkland, United States
 
Inequal Responses of Terrestrial Ecosystem Carbon Turnover Time to Stratospheric Aerosol Injection (1888246)
Dr. Sung-Bin Park and Chang-Eui Park, KIST Korea Institute of Science and Technology, Center for Climate and Carbon Cycle Research, Seoul, South Korea
 
Risk analysis of Stratospheric Aerosol Injection on Polar Ice Melts (1929826)
Dr. Shrabani Tripathy, Washington University in St Louis, Energy, Environmental, and Chemical Engineering, St. Louis, MO, United States and Rajan Chakrabarty, Washington University in St Louis, Energy, Environmental and Chemical Engineering, St. Louis, United States
 
The Impact of the Complexity of the Upper Troposphere and Lower Stratosphere on Stratospheric Aerosol Injection Proposals (Invited) (1948798)
Daniel J Cziczo1, Xiaoli Shen2, Justin Jacquot3, Yaowei Li4, John Dykema5, Jasna V. Pittman6, Jessica B Smith7, Frank N Keutsch8, Kenneth Paul Bowman9, Cameron R Homeyer10, Gregory P Schill11 and Daniel Murphy11, (1)Purdue University, Department of Earth, Atmospheric, and Planetary Sciences, West Lafayette, IN, United States, (2)Purdue University, West Lafayette, United States, (3)Purdue University, Department of Earth, Atmospheric, and Planetary Sciences, West Lafayette, United States, (4)Massachusetts Institute of Technology, Cambridge, MA, United States, (5)Harvard University, School of Engineering and Applied Sciences, Cambridge, United States, (6)Harvard University, Harvard John A. Paulson School of Engineering and Applied Sciences, Cambridge, United States, (7)Harvard Univ/Anderson Group, Cambridge, United States, (8)Harvard University, Cambridge, United States, (9)Texas A&M University, Atmospheric Sciences, College Station, United States, (10)University of Oklahoma, School of Meteorology, Norman, OK, United States, (11)NOAA Chemical Sciences Laboratory, Boulder, United States
 
Quantifying the risks of stratospheric aerosol injection termination shock (Invited) (1955111)
Anthony Harding, Georgia Institute of Technology Main Campus, Atlanta, United States
 
A conservative, decision-relevant approach to identifying potential harms of SAI (1971577)
Katharine Ricke, University of California San Diego, Scripps Institution of Oceanography, La Jolla, CA, United States; University of California San Diego, School of Global Policy and Strategy, La Jolla, United States
 
Sulfur-Neutral Stratospheric Aerosol Injection (1987496)
Vikrant Sapkota1, David Keith2 and B. B. Cael2, (1)University of Chicago, Chicago, IL, United States, (2)University of Chicago, Department of the Geophysical Sciences, Chicago, United States
See more of: Global Environmental Change
<< Previous Session Proposal | Next Session Proposal >>