Editing Space sunshade (section)

===One diffraction grating===
A similar approach involves placing a very large [[diffraction grating]] (thin wire mesh) in space, perhaps at the [[Lagrangian point#L1|L1]] point between the Earth and the Sun. A proposal for a 3,000 ton diffraction mesh was made in 1997 by [[Edward Teller]], [[Lowell Wood]], and [[Roderick Hyde]],<ref name="Teller1997">{{Citation
|author1=Edward Teller
|author2=Roderick Hyde
|author3=Lowell Wood
|name-list-style=amp
|title=Global Warming and Ice Ages: Prospects for Physics-Based Modulation of Global Change
|year=1997
|publisher=Lawrence Livermore National Laboratory
|url=https://e-reports-ext.llnl.gov/pdf/231636.pdf
|accessdate=2010-10-30
|archive-date=27 January 2016
|archive-url=https://web.archive.org/web/20160127185550/https://e-reports-ext.llnl.gov/pdf/231636.pdf
|url-status=live
}}. See pages 10–14 in particular.</ref> although in 2002 these same authors argued for blocking solar radiation in the stratosphere rather than in orbit given then-current space launch technologies.<ref name="Teller2002">{{Citation
 |author1         = Edward Teller, Roderick Hyde
 |author2         = Lowell Wood
 |name-list-style = amp
 |title           = Active Climate Stabilization: Practical Physics-Based Approaches to Prevention of Climate Change
 |year            = 2002
 |publisher       = Lawrence Livermore National Laboratory
 |url             = https://e-reports-ext.llnl.gov/pdf/244671.pdf
 |accessdate      = 2010-10-30
 |archive-date    = 13 May 2009
 |archive-url     = https://web.archive.org/web/20090513044038/https://e-reports-ext.llnl.gov/pdf/244671.pdf
 |url-status      = live
}}</ref>

'''Other Lower Disc Size Estimates'''

{{Too technical|date=January 2025|section}}

Recent work by Feinberg (2022)<ref>{{Cite journal |last=Feinberg |first=Alec |date=2022 |title=Solar Geoengineering Modeling and Applications for Mitigating Global Warming: Assessing Key Parameters and the Urban Heat Island Influence |journal=Frontiers in Climate |volume=4 |doi=10.3389/fclim.2022.870071 |doi-access=free |bibcode=2022FrCli...4.0071F |issn=2624-9553}}</ref> illustrate that lower disc area sizes (factor of approximately 3.5 reduction) are feasible when the background climate response is considered. For example, the background Earth climate would yield less re-radiation and feedback. In addition, disc area sizes can be further reduced by 50 times using an Annual Solar Geoengineering approach as indicated by Feinberg (2024).<ref>{{Cite journal |last=Feinberg |first=Alec |date=February 2024 |title=Annual Solar Geoengineering: Mitigating Yearly Global Warming Increases |journal=Climate |language=en |volume=12 |issue=2 |pages=26 |doi=10.3390/cli12020026 |doi-access=free |bibcode=2024Clim...12...26F |issn=2225-1154}}</ref>