Regional climate impacts of stabilizing global warming at 1.5 K using solar geoengineering

Jones, Anthony C. and Hawcroft, Matthew K. and Haywood, James M. and Jones, Andy and Guo, Xiaoran and Moore, John C. (2018) Regional climate impacts of stabilizing global warming at 1.5 K using solar geoengineering. Earth's Future, 6 (2). pp. 230-251.

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Abstract

The 2015 Paris Agreement aims to limit global warming to well below 2 K above preindustrial levels, and to pursue efforts to limit global warming to 1.5 K, in order to avert dangerous climate change. However, current greenhouse gas emissions targets are more compatible with scenarios exhibiting end-of-century global warming of 2.6–3.1 K, in clear contradiction to the 1.5 K target. In this study, we use a global climate model to investigate the climatic impacts of using solar geoengineering by stratospheric aerosol injection to stabilize global-mean temperature at 1.5 K for the duration of the 21st century against three scenarios spanning the range of plausible greenhouse gas mitigation pathways (RCP2.6, RCP4.5, and RCP8.5). In addition to stabilizing global mean temperature and offsetting both Arctic sea-ice loss and thermosteric sea-level rise, we find that solar geoengineering could effectively counteract enhancements to the frequency of extreme storms in the North Atlantic and heatwaves in Europe, but would be less effective at counteracting hydrological changes in the Amazon basin and North Atlantic storm track displacement. In summary, solar geoengineering may reduce global mean impacts but is an imperfect solution at the regional level, where the effects of climate change are experienced. Our results should galvanize research into the regionality of climate responses to solar geoengineering.


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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Additional Information: Published version deposited in accordance with the copyright policy of the publisher.
Faculty / Department / School: No Faculty
Date Deposited: 27 Feb 2019 05:51
Last Modified: 28 Feb 2019 04:27
Uncontrolled Keywords: Amazon; geoengineering; heatwaves; storms; climate effect; climate modeling; emission inventory; global warming; greenhouse gas; heat wave; international agreement; regional climate; sea ice; storm surge; storm track; stratosphere; Amazonas [Brazil]; Atlantic Ocean; Atlantic Ocean (North); Brazil; Europe
Fields of Research : 04 Earth Sciences > 0401 Atmospheric Sciences > 040104 Climate Change Processes
04 Earth Sciences > 0401 Atmospheric Sciences > 040107 Meteorology
Identification Number or DOI: 10.1002/2017EF000720
URI: http://eprints.usq.edu.au/id/eprint/35936

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