High-Latitude Stratospheric Aerosol Geoengineering Can Be More Effective if Injection Is Limited to Spring
Abstract
Stratospheric aerosol geoengineering focused on the Arctic could substantially reduce local and worldwide impacts of anthropogenic global warming. Because the Arctic receives little sunlight during the winter, stratospheric aerosols present in the winter at high latitudes have little impact on the climate, whereas stratospheric aerosols present during the summer achieve larger changes in radiative forcing. Injecting SO2 in the spring leads to peak aerosol optical depth (AOD) in the summer. We demonstrate that spring injection produces approximately twice as much summer AOD as year-round injection and restores approximately twice as much September sea ice, resulting in less increase in stratospheric sulfur burden, stratospheric heating, and stratospheric ozone depletion per unit of sea ice restored. Furthermore, we also find that differences in AOD between different seasonal injection strategies are small compared to the difference between annual and spring injection.
- Authors:
-
[1];
[1];
[1];
[2]
- Cornell Univ., Ithaca, NY (United States)
- Indiana Univ., Bloomington, IN (United States); Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
- Publication Date:
- Research Org.:
- Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
- Sponsoring Org.:
- USDOE; National Science Foundation (NSF)
- OSTI Identifier:
- 1811261
- Alternate Identifier(s):
- OSTI ID: 1811262
- Report Number(s):
- PNNL-SA-161397
Journal ID: ISSN 0094-8276
- Grant/Contract Number:
- AC05-76RL01830; CBET-1818759; CBET-1931641
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Geophysical Research Letters
- Additional Journal Information:
- Journal Volume: 48; Journal Issue: 9; Journal ID: ISSN 0094-8276
- Publisher:
- American Geophysical Union
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 58 GEOSCIENCES; Arctic sea ice; geoengineering; stratospheric aerosol injection
Citation Formats
Lee, Walker Raymond, MacMartin, Douglas G., Visioni, Daniele, and Kravitz, Ben. High-Latitude Stratospheric Aerosol Geoengineering Can Be More Effective if Injection Is Limited to Spring. United States: N. p., 2021.
Web. doi:10.1029/2021gl092696.
Lee, Walker Raymond, MacMartin, Douglas G., Visioni, Daniele, & Kravitz, Ben. High-Latitude Stratospheric Aerosol Geoengineering Can Be More Effective if Injection Is Limited to Spring. United States. https://doi.org/10.1029/2021gl092696
Lee, Walker Raymond, MacMartin, Douglas G., Visioni, Daniele, and Kravitz, Ben. Mon .
"High-Latitude Stratospheric Aerosol Geoengineering Can Be More Effective if Injection Is Limited to Spring". United States. https://doi.org/10.1029/2021gl092696. https://www.osti.gov/servlets/purl/1811261.
@article{osti_1811261,
title = {High-Latitude Stratospheric Aerosol Geoengineering Can Be More Effective if Injection Is Limited to Spring},
author = {Lee, Walker Raymond and MacMartin, Douglas G. and Visioni, Daniele and Kravitz, Ben},
abstractNote = {Stratospheric aerosol geoengineering focused on the Arctic could substantially reduce local and worldwide impacts of anthropogenic global warming. Because the Arctic receives little sunlight during the winter, stratospheric aerosols present in the winter at high latitudes have little impact on the climate, whereas stratospheric aerosols present during the summer achieve larger changes in radiative forcing. Injecting SO2 in the spring leads to peak aerosol optical depth (AOD) in the summer. We demonstrate that spring injection produces approximately twice as much summer AOD as year-round injection and restores approximately twice as much September sea ice, resulting in less increase in stratospheric sulfur burden, stratospheric heating, and stratospheric ozone depletion per unit of sea ice restored. Furthermore, we also find that differences in AOD between different seasonal injection strategies are small compared to the difference between annual and spring injection.},
doi = {10.1029/2021gl092696},
journal = {Geophysical Research Letters},
number = 9,
volume = 48,
place = {United States},
year = {Mon May 03 00:00:00 EDT 2021},
month = {Mon May 03 00:00:00 EDT 2021}
}
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