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dc.contributor.authorJones, A
dc.contributor.authorHaywood, JM
dc.contributor.authorJones, AC
dc.contributor.authorTilmes, S
dc.contributor.authorKravitz, B
dc.contributor.authorRobock, A
dc.date.accessioned2021-02-03T15:43:45Z
dc.date.issued2021-01-29
dc.description.abstractThe realization of the difficulty of limiting global-mean temperatures to within 1.5 or 2.0 ∘C above pre-industrial levels stipulated by the 21st Conference of Parties in Paris has led to increased interest in solar radiation management (SRM) techniques. Proposed SRM schemes aim to increase planetary albedo to reflect more sunlight back to space and induce a cooling that acts to partially offset global warming. Under the auspices of the Geoengineering Model Intercomparison Project, we have performed model experiments whereby global temperature under the high-forcing SSP5-8.5 scenario is reduced to follow that of the medium-forcing SSP2-4.5 scenario. Two different mechanisms to achieve this are employed: the first via a reduction in the solar constant (experiment G6solar) and the second via modelling injections of sulfur dioxide (experiment G6sulfur) which forms sulfate aerosol in the stratosphere. Results from two state-of-the-art coupled Earth system models (UKESM1 and CESM2-WACCM6) both show an impact on the North Atlantic Oscillation (NAO) in G6sulfur but not in G6solar. Both models show a persistent positive anomaly in the NAO during the Northern Hemisphere winter season in G6sulfur, suggesting an increase in zonal flow and an increase in North Atlantic storm track activity impacting the Eurasian continent and leading to high-latitude warming over Europe and Asia. These results are broadly consistent with previous findings which show similar impacts from stratospheric volcanic aerosol on the NAO and emphasize that detailed modelling of geoengineering processes is required if accurate impacts of SRM effects are to be simulated. Differences remain between the two models in predicting regional changes over the continental USA and Africa, suggesting that more models need to perform such simulations before attempting to draw any conclusions regarding potential continental-scale climate change under SRM.en_GB
dc.description.sponsorshipUS National Science Foundationen_GB
dc.identifier.citationVol. 21, pp. 1287 - 1304en_GB
dc.identifier.doihttps://doi.org/10.5194/acp-21-1287-2021
dc.identifier.grantnumber1852977en_GB
dc.identifier.urihttp://hdl.handle.net/10871/124602
dc.language.isoenen_GB
dc.publisherCopernicus GmbHen_GB
dc.rights© Author(s) 2021. This work is distributed under the Creative Commons Attribution 4.0 License.en_GB
dc.titleNorth Atlantic Oscillation response in GeoMIP experiments G6solar and G6sulfur: why detailed modelling is needed for understanding regional implications of solar radiation managementen_GB
dc.typeArticleen_GB
dc.date.available2021-02-03T15:43:45Z
dc.identifier.issn1680-7316
dc.descriptionThis is the final version. Available from Copernicus Publications via the DOI in this record. en_GB
dc.identifier.eissn1680-7324
dc.identifier.journalAtmospheric Chemistry and Physicsen_GB
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/en_GB
dcterms.dateAccepted2020-12-13
rioxxterms.versionVoRen_GB
rioxxterms.typeJournal Article/Reviewen_GB
refterms.dateFCD2021-02-03T15:40:17Z
refterms.versionFCDVoR
refterms.dateFOA2021-02-03T15:43:52Z
refterms.panelBen_GB


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© Author(s) 2021. This work is distributed under
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Except where otherwise noted, this item's licence is described as © Author(s) 2021. This work is distributed under the Creative Commons Attribution 4.0 License.