气候变化领域集成服务门户(CCPortal): Is Turning Down the Sun a Good Proxy for Stratospheric Sulfate Geoengineering?

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DOI	10.1029/2020JD033952
	Is Turning Down the Sun a Good Proxy for Stratospheric Sulfate Geoengineering?
	Visioni D.; MacMartin D.G.; Kravitz B.
发表日期	2021
ISSN	2169897X
卷号	126 期号:5
英文摘要	Deliberately blocking out a small portion of the incoming solar radiation would cool the climate. One such approach would be injecting SO2 into the stratosphere, which would produce sulfate aerosols that would remain in the atmosphere for 1–3 years, reflecting part of the incoming shortwave radiation. The cooling produced by the aerosols can offset the warming produced by increased greenhouse gas (GHG) concentrations, but it would also affect the climate differently, leading to residual differences compared to a climate not affected by either. Many climate model simulations of geoengineering have used a uniform reduction of the incoming solar radiation as a proxy for stratospheric aerosols, both because many models are not designed to adequately capture relevant stratospheric aerosol processes, and because a solar reduction has often been assumed to capture the most important differences between how stratospheric aerosols and GHG would affect the climate. Here we show that dimming the sun does not produce the same surface climate effects as simulating aerosols in the stratosphere. By more closely matching the spatial pattern of solar reduction to that of the aerosols, some improvements in this idealized representation are possible, with further improvements if the stratospheric heating produced by the aerosols is included. This is relevant both for our understanding of the physical mechanisms driving the changes observed in stratospheric-sulfate geoengineering simulations, and in terms of the relevance of impact assessments that use a uniform solar dimming. © 2021. American Geophysical Union. All Rights Reserved.
语种	英语
来源期刊	Journal of Geophysical Research: Atmospheres
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/185413
作者单位	Sibley School for Mechanical and Aerospace Engineering, Cornell University, Ithaca, NY, United States; Department of Earth and Atmospheric Sciences, Indiana University, Bloomington, IN, United States; Atmospheric Sciences and Global Change Division, Pacific Northwest National Laboratory, Richland, WA, United States
推荐引用方式 GB/T 7714	Visioni D.,MacMartin D.G.,Kravitz B.. Is Turning Down the Sun a Good Proxy for Stratospheric Sulfate Geoengineering?[J],2021,126(5).
APA	Visioni D.,MacMartin D.G.,&Kravitz B..(2021).Is Turning Down the Sun a Good Proxy for Stratospheric Sulfate Geoengineering?.Journal of Geophysical Research: Atmospheres,126(5).
MLA	Visioni D.,et al."Is Turning Down the Sun a Good Proxy for Stratospheric Sulfate Geoengineering?".Journal of Geophysical Research: Atmospheres 126.5(2021).