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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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edf.org
article
https://www.edf.org/studying-impacts-solar-radiation-modification
# Studying the impacts of Solar Radiation Modification. EDF is part of a growing number of scientists, nonprofits and companies studying Solar Radiation Modification (SRM), a new technology that could temporarily lower global temperatures. EDF’s policy-relevant research program focuses on the potential impacts of stratospheric aerosol injection (SAI). We aim to both advance the understanding of SRM’s impacts and also foster public trust by working collaboratively in an open and transparent manner. Solar radiation modification (SRM) is a deliberate intervention into the climate system to temporarily reduce the earth’s temperature. EDF is beginning policy-relevant research on SRM and its impacts, and we’re focusing on stratospheric aerosol injection (SAI) as a priority. ### EDF grantees study past data to understand potential SRM impacts. ### Why it’s time to explore the potential impacts of Solar Radiation Modification. ### Workshop Report Proceedings from a Workshop on Operationalizing Research Governance for Solar Radiation Modification (SRM). ### Workshop Report: Identifying and leveraging empirical datasets for Solar Radiation Modification Impact Research.
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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.
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salatainstitute.harvard.edu
research
https://salatainstitute.harvard.edu/research-initiatives/the-harvard-solar-ge…
The Harvard Solar Geoengineering Research Program (SGRP) aims to reduce uncertainties surrounding solar geoengineering; generate critical science, technology, and policy insights; and help inform the public debate surrounding this controversial idea. Recognizing that solar geoengineering could not be a replacement for reducing emissions or adapting to climate impacts, SGRP draws on Harvard’s research capabilities and global convening power to provide the knowledge necessary in considering solar geoengineering as a supplement to broader mitigation and adaptation efforts. The Harvard Solar Geoengineering Research Program (SGRP) aims to reduce uncertainties surrounding solar geoengineering; generate critical science, technology, and policy insights; and help inform the public debate surrounding this controversial idea. Recognizing that solar geoengineering could not be a replacement for reducing emissions or adapting to climate impacts, SGRP draws on Harvard’s research capabilities and global convening power to provide the knowledge necessary in considering solar geoengineering as a supplement to broader mitigation and adaptation efforts. * In 1980, Professor Tom Schelling chaired a National Academy of Sciences committee whose report, *Changing Climate*, addressed the potential for solar geoengineering to counter global warming.