edu.ucar.opensky::articles:26626 UCAR/NCAR - Library OpenSky Support PO Box 3000 Boulder CO 80307-3000 opensky@ucar.edu http://opensky.ucar.edu/ homepage pointOfContact 2025-12-24T19:54:39.512175 ISO 19115-2 Geographic Information - Metadata - Part 2: Extensions for Imagery and Gridded Data ISO 19115-2:2009(E) https://n2t.org/ark:/85065/d7w95f7q https://doi.org/10.7298/xr82-sv86 https Related Dataset #1 Data from: Scenarios for modeling solar radiation modification https://doi.org/10.5065/D6RX99HX https Related Service #1 Cheyenne: SGI ICE XA Cluster High-latitude stratospheric aerosol injection to preserve the Arctic 2023-01-01T00:00:00Z publication https://n2t.org/ark:/85065/d7w95f7q https://doi.org/10.1029/2022EF003052 Lee, W. R. author MacMartin, D. G. author Visioni, D. author Kravitz, B. author Chen, Y. author Moore, J. C. author Leguy, Gunter author Lawrence, David M. author Bailey, David A. author UCAR/NCAR - Library publisher Stratospheric aerosol injection (SAI) has been shown in climate models to reduce some impacts of global warming in the Arctic, including the loss of sea ice, permafrost thaw, and reduction of Greenland Ice Sheet (GrIS) mass; SAI at high latitudes could preferentially target these impacts. In this study, we use the Community Earth System Model to simulate two Arctic-focused SAI strategies, which inject at 60 degrees N latitude each spring with injection rates adjusted to either maintain September Arctic sea ice at 2030 levels ("Arctic Low") or restore it to 2010 levels ("Arctic High"). Both simulations maintain or restore September sea ice to within 10% of their respective targets, reduce permafrost thaw, and increase GrIS surface mass balance by reducing runoff. Arctic High reduces these impacts more effectively than a globally focused SAI strategy that injects similar quantities of SO2 at lower latitudes. However, Arctic-focused SAI is not merely a "reset button" for the Arctic climate, but brings about a novel climate state, including changes to the seasonal cycles of Northern Hemisphere temperature and sea ice and less high-latitude carbon uptake relative to SSP2-4.5. Additionally, while Arctic-focused SAI produces the most cooling near the pole, its effects are not confined to the Arctic, including detectable cooling throughout most of the northern hemisphere for both simulations, increased mid-latitude sulfur deposition, and a southward shift of the location of the Intertropical Convergence Zone. For these reasons, it would be incorrect to consider Arctic-focused SAI as "local" geoengineering, even when compared to a globally focused strategy. UCAR/NCAR - Library OpenSky Support PO Box 3000 Boulder CO 80307-3000 opensky@ucar.edu http://opensky.ucar.edu/ homepage pointOfContact PDF Text theme Resource Type 2016-01-01T00:00:00Z publication Copyright author(s). This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License. None eng geoscientificInformation