Cited by 265Climate Change and GeoengineeringAtmospheric aerosols and cloudsEarth Systems and Cosmic Evolution

An overview of the Earth system science of solar geoengineering

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Irvine, Peter J., Kravitz, Ben, Lawrence, Mark G., Muri, Helene·2016·WIREs Climate Change

Abstract

Solar geoengineering has been proposed as a means to cool the Earth by increasing the reflection of sunlight back to space, for example, by injecting reflective aerosol particles (or their precursors) into the lower stratosphere. Such proposed techniques would not be able to substitute for mitigation of greenhouse gas (GHG) emissions as a response to the risks of climate change, as they would only mask some of the effects of global warming. They might, however, eventually be applied as a complementary approach to reduce climate risks. Thus, the Earth system consequences of solar geoengineering are central to understanding its potentials and risks. Here we review the state‐of‐the‐art knowledge about stratospheric sulfate aerosol injection and an idealized proxy for this, ‘sunshade geoengineering,’ in which the intensity of incoming sunlight is directly reduced in models. Studies are consistent in suggesting that sunshade geoengineering and stratospheric aerosol injection would generally offset the climate effects of elevated GHG concentrations. However, it is clear that a solar geoengineered climate would be novel in some respects, one example being a notably reduced hydrological cycle intensity. Moreover, we provide an overview of nonclimatic aspects of the response to stratospheric aerosol injection, for example, its effect on ozone, and the uncertainties around its consequences. We also consider the issues raised by the partial control over the climate that solar geoengineering would allow. Finally, this overview highlights some key research gaps in need of being resolved to provide sound basis for guidance of future decisions around solar geoengineering. WIREs Clim Change 2016, 7:815–833. doi: 10.1002/wcc.423 This article is categorized under: Climate Models and Modeling > Knowledge Generation with Models

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  • Solar geoengineering proposals are real proposals for solar radiation management.

    “Airships floating through the sky, spraying aerosols; robotic boats crisscrossing the ocean, firing vertical jets of spray; arrays of mirrors carefully positioned in space, micro-adjusted by remote control; these images seem like science fiction, but they are actually real proposals for solar radiation management, commonly called solar geoengineering [375,418,419,728].”

    From Tackling climate change with machine learning (2023) · cites this paper as [375]

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Authors
Irvine, P. J., Kravitz, B., Lawrence, M. G., & Muri, H.
Affiliations
  • Harvard University (US)
  • Pacific Northwest National Laboratory (US)
  • Research Institute for Sustainability at GFZ (DE)
  • University of Oslo (NO)
Corresponding author
Irvine, Peter J.
Venue
WIREs Climate Change
Publisher
Wiley
Published
2016-07-14
Volume
7
Issue
6
Pages
815-833
ISSN
  • 1757-7780 (ISSN-L)
  • 1757-7799
OpenAlex
W2563387308
Cited by
239
References
122
Citations by year
2026: 12 · 2025: 25 · 2024: 36 · 2023: 27 · 2022: 31 · 2021: 20 · 2020: 17 · 2019: 35 · 2018: 16 · 2017: 14 · 2016: 5 · 2015: 1
FWCI
17.26
Type
journal article
Language
en
Open access
Locations
  • Wiley Interdisciplinary Reviews Climate Change (publishedVersion, cc-by-nc)
  • UCL Discovery (University College London) (submittedVersion)
  • Publication Database GFZ (GFZ German Research Centre for Geosciences) (submittedVersion)
  • Publication Database IASS (Institute for Advanced Sustainability Studies (IASS)) (submittedVersion, other-oa)
Funders
Norges Forskningsråd (229760/E10)
Topics
  • Physical Sciences › Environmental Science › Global and Planetary Change › Climate Change and Geoengineering
  • Physical Sciences › Environmental Science › Global and Planetary Change › Atmospheric aerosols and clouds
  • Physical Sciences › Earth and Planetary Sciences › Atmospheric Science › Earth Systems and Cosmic Evolution
Keywords
solar geoengineering, stratospheric aerosol injection, sulfate aerosols, greenhouse gas emissions reduction, water cycle, stratospheric ozone, geoengineering risks, climate control

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