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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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en.wikipedia.org
article
https://en.wikipedia.org/wiki/Solar_radiation_modification
SRM is also known as sunlight reflection methods, solar climate engineering, albedo modification, and solar radiation management.
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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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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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congress.gov
official
https://www.congress.gov/crs-product/R47551
These methods—stratospheric aerosol injection (SAI), marine cloud brightening (MCB), and cirrus cloud thinning (CCT)—all involve the impact of
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support.climateinteractive.org
article
https://support.climateinteractive.org/support/solutions/articles/47001159219…
Our Simulators En-ROADS C-ROADS FEBAC. Explore the En-ROADS Simulator. Our Experiences Climate Solutions Workshop Climate Action Simulation Game World Climate Simulation Game Custom Experience. Frequently Asked Questions Top Resources & Materials Contact Us. Solution home En-ROADS How do I simulate...? En-ROADS does not include possible geoengineering methods such as solar radiation management at this time. One way to approximate a test of a geoengineering approach in En-ROADS would be to lower the climate sensitivity assumption in the model. En-ROADS does include carbon dioxide removal (CDR) methods (removing carbon dioxide from the atmosphere, for example through bioenergy with carbon capture and storage, or direct air capture), and these are included in the “Technological Carbon Removal” slider and its advanced settings. To learn more about CDR in En-ROADS, read this FAQ: How do I simulate Carbon Dioxide Removal (CDR)? Capturing that impact and the necessary equity/diplomatic considerations that would need to be wrestled with if SRM is deployed is not something that En-ROADS is designed for. Did you find it helpful?
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carbonbrief.org
article
https://www.carbonbrief.org/explainer-six-ideas-to-limit-global-warming-with-…
However, research shows that using solar geoengineering could indirectly lower the amount of CO2 in the atmosphere by stemming permafrost melt, reducing energy-sector emissions and causing changes to the carbon-cycle feedback. Aerosol injection could have an edge on other proposed forms of solar geoengineering because it would not require a large technological leap to become a reality, Jones says:. These brighter clouds would reflect away more sunlight, says Prof Douglas MacMartin, an engineering researcher from Cornell University, who contributed to the US House of Representatives’ hearing on geoengineering. Earlier this month, MacMartin, Keith and Prof Katharine Ricke, a climate scientist from the University of California, San Diego, published a research paper exploring how solar geoengineering – via releasing aerosols into the stratosphere – could be used as part of an “overall strategy” for limiting global warming to 1.5C, which is the aspirational target of the Paris Agreement. However, the researchers point out that using solar geoengineering to hold global warming to 1.5C would not have the same environmental effect as reaching the target using mitigation.