Changes in Hadley circulation and intertropical convergence zone under strategic stratospheric aerosol geoengineering
Abstract
Stratospheric aerosol geoengineering has been proposed as a potential solution to reduce climate change and its impacts. Here, we explore the responses of the Hadley circulation (HC) intensity and the intertropical convergence zone (ITCZ) using the strategic stratospheric aerosol geoengineering, in which sulfur dioxide was injected into the stratosphere at four different locations to maintain the global-mean surface temperature and the interhemispheric and equator-to-pole temperature gradients at present-day values (baseline). Simulations show that, relative to the baseline, strategic stratospheric aerosol geoengineering generally maintains northern winter December–January–February (DJF) HC intensity under RCP8.5, while it overcompensates for the greenhouse gas (GHG)-forced southern winter June–July–August (JJA) HC intensity increase, producing a 3.5 ± 0.4% weakening. The residual change of southern HC intensity in JJA is mainly associated with stratospheric heating and tropospheric temperature response due to enhanced stratospheric aerosol concentrations. Geoengineering overcompensates for the GHG-driven northward ITCZ shifts, producing 0.7° ± 0.1° and 0.2° ± 0.1° latitude southward migrations in JJA and DJF, respectively relative to the baseline. These migrations are affected by tropical interhemispheric temperature differences both at the surface and in the free troposphere. Further strategies for reducing the residual change of HC intensity and ITCZ shifts under stratospheric aerosol geoengineeringmore »
- Authors:
-
[1];
[3];
[2];
[2];
[4];
[5];
[6];
[7];
[2];
[10]
- Chinese Academy of Sciences (CAS), Beijing (China)
- Cornell Univ., Ithaca, NY (United States)
- Indiana Univ., Bloomington, IN (United States); Pacific Northwest National Laboratory (PNNL), Richland, WA (United States)
- Texas A & M Univ., College Station, TX (United States)
- Tsinghua Univ., Beijing (China)
- Peking Univ., Beijing (China)
- Indiana Univ., Bloomington, IN (United States)
- Chinese Academy of Sciences (CAS), Beijing (China); University of Lapland (Finland)
- Ministry of Natural Resources (China)
- Chinese Academy of Sciences (CAS), Beijing (China); University of Chinese Academy of Sciences, Beijing (China)
- Publication Date:
- Research Org.:
- Pacific Northwest National Laboratory (PNNL), Richland, WA (United States)
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 2282468
- Report Number(s):
- PNNL-SA-179464
Journal ID: ISSN 2397-3722
- Grant/Contract Number:
- AC05-76RL01830
- Resource Type:
- Accepted Manuscript
- Journal Name:
- npj Climate and Atmospheric Science
- Additional Journal Information:
- Journal Volume: 5; Journal Issue: 1; Journal ID: ISSN 2397-3722
- Publisher:
- Springer Nature
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 54 ENVIRONMENTAL SCIENCES; atmospheric dynamics; climate and earth system modelling; climate-change mitigation
Citation Formats
Cheng, Wei, MacMartin, Douglas G., Kravitz, Ben, Visioni, Daniele, Bednarz, Ewa M., Xu, Yangyang, Luo, Yong, Huang, Lei, Hu, Yongyun, Staten, Paul W., Hitchcock, Peter, Moore, John C., Guo, Anboyu, and Deng, Xiangzheng. Changes in Hadley circulation and intertropical convergence zone under strategic stratospheric aerosol geoengineering. United States: N. p., 2022.
Web. doi:10.1038/s41612-022-00254-6.
Cheng, Wei, MacMartin, Douglas G., Kravitz, Ben, Visioni, Daniele, Bednarz, Ewa M., Xu, Yangyang, Luo, Yong, Huang, Lei, Hu, Yongyun, Staten, Paul W., Hitchcock, Peter, Moore, John C., Guo, Anboyu, & Deng, Xiangzheng. Changes in Hadley circulation and intertropical convergence zone under strategic stratospheric aerosol geoengineering. United States. https://doi.org/10.1038/s41612-022-00254-6
Cheng, Wei, MacMartin, Douglas G., Kravitz, Ben, Visioni, Daniele, Bednarz, Ewa M., Xu, Yangyang, Luo, Yong, Huang, Lei, Hu, Yongyun, Staten, Paul W., Hitchcock, Peter, Moore, John C., Guo, Anboyu, and Deng, Xiangzheng. Tue .
"Changes in Hadley circulation and intertropical convergence zone under strategic stratospheric aerosol geoengineering". United States. https://doi.org/10.1038/s41612-022-00254-6. https://www.osti.gov/servlets/purl/2282468.
@article{osti_2282468,
title = {Changes in Hadley circulation and intertropical convergence zone under strategic stratospheric aerosol geoengineering},
author = {Cheng, Wei and MacMartin, Douglas G. and Kravitz, Ben and Visioni, Daniele and Bednarz, Ewa M. and Xu, Yangyang and Luo, Yong and Huang, Lei and Hu, Yongyun and Staten, Paul W. and Hitchcock, Peter and Moore, John C. and Guo, Anboyu and Deng, Xiangzheng},
abstractNote = {Stratospheric aerosol geoengineering has been proposed as a potential solution to reduce climate change and its impacts. Here, we explore the responses of the Hadley circulation (HC) intensity and the intertropical convergence zone (ITCZ) using the strategic stratospheric aerosol geoengineering, in which sulfur dioxide was injected into the stratosphere at four different locations to maintain the global-mean surface temperature and the interhemispheric and equator-to-pole temperature gradients at present-day values (baseline). Simulations show that, relative to the baseline, strategic stratospheric aerosol geoengineering generally maintains northern winter December–January–February (DJF) HC intensity under RCP8.5, while it overcompensates for the greenhouse gas (GHG)-forced southern winter June–July–August (JJA) HC intensity increase, producing a 3.5 ± 0.4% weakening. The residual change of southern HC intensity in JJA is mainly associated with stratospheric heating and tropospheric temperature response due to enhanced stratospheric aerosol concentrations. Geoengineering overcompensates for the GHG-driven northward ITCZ shifts, producing 0.7° ± 0.1° and 0.2° ± 0.1° latitude southward migrations in JJA and DJF, respectively relative to the baseline. These migrations are affected by tropical interhemispheric temperature differences both at the surface and in the free troposphere. Further strategies for reducing the residual change of HC intensity and ITCZ shifts under stratospheric aerosol geoengineering could involve minimizing stratospheric heating and restoring and preserving the present-day tropical tropospheric interhemispheric temperature differences.},
doi = {10.1038/s41612-022-00254-6},
journal = {npj Climate and Atmospheric Science},
number = 1,
volume = 5,
place = {United States},
year = {Tue Apr 19 00:00:00 EDT 2022},
month = {Tue Apr 19 00:00:00 EDT 2022}
}
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