气候变化领域集成服务门户(CCPortal): North Atlantic Oscillation response in GeoMIP experiments G6solar and G6sulfur: Why detailed modelling is needed for understanding regional implications of solar radiation management

CCPortal

DOI	10.5194/acp-21-1287-2021
	North Atlantic Oscillation response in GeoMIP experiments G6solar and G6sulfur: Why detailed modelling is needed for understanding regional implications of solar radiation management
	Jones A.; Haywood J.M.; Jones A.C.; Tilmes S.; Kravitz B.; Robock A.
发表日期	2021
ISSN	1680-7316
起始页码	1287
结束页码	1304
卷号	21 期号:2
英文摘要	The realization of the difficulty of limiting globalmean temperatures to within 1.5 or 2.0 °C above preindustrial 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 highforcing 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. © 2021 Author(s).
语种	英语
scopus关键词	aerosol; atmospheric forcing; concentration (composition); experimental study; global warming; North Atlantic Oscillation; regional climate; solar radiation; Africa; United States
来源期刊	ATMOSPHERIC CHEMISTRY AND PHYSICS
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/247191
作者单位	Met Office Hadley Centre, Exeter, EX1 3PB, United Kingdom; Global Systems Institute, College of Engineering, Mathematics and Physical Sciences, University of Exeter, Exeter, EX4 4QE, United Kingdom; Met Office, Exeter, EX1 3PB, United Kingdom; Atmospheric Chemistry, Observations and Modeling Laboratory, National Center for Atmospheric Research, Boulder, CO 80307, United States; Department of Earth and Atmospheric Sciences, Indiana University, Bloomington, IN 47405-1405, United States; Atmospheric Sciences and Global Change Division, Pacific Northwest National Laboratory, Richland, WA 99352, United States; Department of Environmental Sciences, Rutgers University, New Brunswick, NJ 08901-8551, United States
推荐引用方式 GB/T 7714	Jones A.,Haywood J.M.,Jones A.C.,et al. North Atlantic Oscillation response in GeoMIP experiments G6solar and G6sulfur: Why detailed modelling is needed for understanding regional implications of solar radiation management[J],2021,21(2).
APA	Jones A.,Haywood J.M.,Jones A.C.,Tilmes S.,Kravitz B.,&Robock A..(2021).North Atlantic Oscillation response in GeoMIP experiments G6solar and G6sulfur: Why detailed modelling is needed for understanding regional implications of solar radiation management.ATMOSPHERIC CHEMISTRY AND PHYSICS,21(2).
MLA	Jones A.,et al."North Atlantic Oscillation response in GeoMIP experiments G6solar and G6sulfur: Why detailed modelling is needed for understanding regional implications of solar radiation management".ATMOSPHERIC CHEMISTRY AND PHYSICS 21.2(2021).