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geoengineering.global
article
https://geoengineering.global/solar-radiation-management/
Solar radiation management or solar geoengineering is a large category of diverse climate engineering approaches that mitigate or reverse Global Warming by reflecting sunlight (i.e., solar radiation/shortwave radiation) into space before it is absorbed by the environment and converted into heat (i.e., transformed solar radiation, thermal radiation, thermal motion of particles, vibrational energy or longwave radiation). Solar radiation management also has approaches that try to move heat away from the Earth’s surface and/or outside our atmosphere (into space). Solar radiation management approaches protect the planet emitted wavelengths of light from the sun. The solar spectrum (the solar radiation that hits the Earth’s upper atmosphere) includes infrared (52-55%), visible light (42-43%) and ultraviolet (3-5%) (Figure 2). In the model, 30% (atmosphere (6%) + clouds (20%) + Earth’s surface (4%)) of the incoming solar radiation (shortwave radiation) is reflected back into space before it is converted to heat (thermal radiation or longwave radiation).
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net-zero.blog
article
https://net-zero.blog/book-blog/climate-engineering-solar-radiation-management
Solar Radiation Management (SRM) techniques are designed to reduce the amount of solar energy absorbed by the planet, to reduce radiative
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climate.gov
official
https://www.climate.gov/news-features/understanding-climate/solar-radiation-m…
**Solar Radiation Modification (SRM) refers to deliberate, large-scale actions intended to decrease global average surface temperatures by increasing the reflection of sunlight away from the Earth.** Proposed SRM methods involve the use of aerosols (small particles) or other materials to increase the reflectivity of the atmosphere, clouds, or Earth’s surface. **Long-term protection of Earth’s climate and oceans requires substantial reductions in emissions and atmospheric concentrations of CO2 and other GHGs. SRM is not considered a substitute for climate mitigation efforts, which include decarbonization and GHG emission cuts.** SRM research is being conducted as a response to growing concerns that the pace of CO2 emissions reductions and CDR technology development is not sufficient to avoid severe impacts of climate change in the next decades. **Many of the processes most important for understanding SRM approaches—such as those that control the formation of clouds and aerosols—are among the most uncertain components of the climate system.** Climate models differ in simulating large-scale aerosol climate effects, including on surface temperatures, due to variations in how aerosol processes, atmospheric transport and mixing, and physics are represented.
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nationalacademies.org
article
https://www.nationalacademies.org/read/12782/chapter/19
In this chapter, we briefly review what is known about proposed solar radiation management (SRM) approaches and related governance and ethical issues and conclude with a discussion of the research needed to better understand SRM. For use of SRM as a potential “backstop option” in the case of an emerging “climate emergency,” improved observations and understanding of climate system thresholds, reversibility, and abrupt changes (see Chapter 6)—for example, observations to let us know when an ice sheet or methane hydrate field may become unstable (e.g., Khvorostyanov et al., 2008; Shakhova et al., 2010)—could inform societal debate and decision making about needs for deployment of a climate intervention system. There is, however, additional research that would be needed to support full evaluation of SRM approaches (just as there is with other options for limiting the magnitude of future climate change), including a variety of social, ecological, and physical sciences (see Chapter 4).
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swissre.com
research
https://www.swissre.com/institute/research/sonar/sonar2023/solar-radiation-ri…
# Solar radiation management – risks from reversing climate change. Just as current temperature increases are likely fuelling changes in climate (drought, wet seasons) and extreme weather events (storms, flooding), so too will cooling via SRM. To predict the effects of cooling, new models are needed reflecting where, what cooling agent is used and how much, and for how long it is injected into the stratosphere.5 As models are currently under development, it is difficult to say which countries/regions would benefit or be harmed by consequent changes in climate and weather patterns. Any pattern changes, however, could lead to unanticipated losses for insurers.6 One example of this could be a shift in the geographical range of communicable diseases like malaria, which could redistribute in developing countries.7 It could also lead to an increase or geographical shift of extreme weather events like droughts or hurricanes.8 In general benefits and risks would most likely not be fairly distributed globally.
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arcticiceproject.org
article
https://www.arcticiceproject.org/what-you-need-to-know-about-solar-radiation-…
Space-based geoengineering involves the use of space-based devices to reflect or block sunlight, thereby reducing the amount of solar energy reaching the Earth.
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scijournals.onlinelibrary.wiley.com
research
https://scijournals.onlinelibrary.wiley.com/doi/full/10.1002/ese3.2083
This approach involves reflecting sunlight back into space while allowing Earth's infrared radiation to escape, thereby controlling climate change.
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congress.gov
official
https://www.congress.gov/crs-product/R47551
Solar geoengineering (SG) refers to a set of methods aimed at cooling the Earth in order to counteract the warming effects of increases in greenhouse gases (