气候变化领域集成服务门户(CCPortal): Halving warming with stratospheric aerosol geoengineering moderates policy-relevant climate hazards

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DOI	10.1088/1748-9326/ab76de
	Halving warming with stratospheric aerosol geoengineering moderates policy-relevant climate hazards
	Irvine P.J.; Keith D.W.
发表日期	2020
ISSN	17489318
卷号	15 期号:4
英文摘要	Stratospheric aerosol geoengineering is a proposal to artificially thicken the layer of reflective aerosols in the stratosphere and it is hoped that this may offer a means of reducing average climate changes. However, previous work has shown that it could not perfectly offset the effects of climate change and there is a concern that it may worsen climate impacts in some regions. One approach to evaluating this concern is to test whether the absolute magnitude of climate change at each location is significantly increased (exacerbated) or decreased (moderated) relative to the period just preceding deployment. In prior work it was found that halving warming with an idealized solar constant reduction would substantially reduce climate change overall, exacerbating change in a small fraction of places. Here, we test if this result holds for a more realistic representation of stratospheric aerosol geoengineering using the data from the geoengineering large ensemble (GLENS). Using a linearized scaling of GLENS we find that halving warming with stratospheric aerosols moderates important climate hazards in almost all regions. Only 1.3% of land area sees exacerbation of change in water availability, and regions that are exacerbated see wetting not drying contradicting the common assumption that solar geoengineering leads to drying in general. These results suggest that halving warming with stratospheric aerosol geoengineering could potentially reduce key climate hazards substantially while avoiding some problems associated with fully offsetting warming. © 2020 The Author(s). Published by IOP Publishing Ltd.
英文关键词	Climate; Climate impacts; Climate intervention; Solar geoengineering; Solar radiation management; Stratospheric aerosol geoengineering
语种	英语
scopus关键词	Aerosols; Hazards; Climate hazards; Climate impacts; Geoengineering; Land areas; Solar constant; Stratospheric aerosols; Water availability; Climate change; aerosol; climate change; climate effect; environmental hazard; natural hazard; stratosphere; warming
来源期刊	Environmental Research Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/154082
作者单位	University College London, Earth Sciences, London, WC1E 6BS, United Kingdom; Harvard John A. Paulson School of Engineering and Applied Sciences, Cambridge, MA 02138, United States
推荐引用方式 GB/T 7714	Irvine P.J.,Keith D.W.. Halving warming with stratospheric aerosol geoengineering moderates policy-relevant climate hazards[J],2020,15(4).
APA	Irvine P.J.,&Keith D.W..(2020).Halving warming with stratospheric aerosol geoengineering moderates policy-relevant climate hazards.Environmental Research Letters,15(4).
MLA	Irvine P.J.,et al."Halving warming with stratospheric aerosol geoengineering moderates policy-relevant climate hazards".Environmental Research Letters 15.4(2020).