Evidence that deliberate marine cloud brightening can be more effective than previously thought

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dc.contributor.authorChen, Ying
dc.contributor.authorHaywood, Jim
dc.contributor.authorWang, Yu
dc.contributor.authorMalavelle, Florent
dc.contributor.authorJordan, George
dc.contributor.authorPeace, Amy
dc.contributor.authorPartridge, Daniel
dc.contributor.authorCho, Nayeong
dc.contributor.authorOreopoulos, Lazaros
dc.contributor.authorPlatnick, Steven
dc.contributor.authorGrosvenor, Daniel
dc.contributor.authorField, Paul
dc.contributor.authorAllan, Richard
dc.contributor.authorLohmann, Ulrike
dc.date.accessioned2023-10-13T14:01:18Z
dc.date.available2023-10-13T14:01:18Z
dc.date.issued2023-09-22
dc.description.abstractWith global warming currently standing at approximately + 1.2 °C, climate change is a pressing global issue. Marine cloud brightening (MCB) proposes injecting aerosols into marine clouds to enhance their reflectivity and thereby planetary albedo. However, because it is unclear how aerosols influence clouds, especially cloud cover, both climate projections and the effectiveness of MCB remain uncertain. Here, we use volcanic eruptions to quantify the aerosol fingerprint on tropical marine clouds. We observe a large enhancement in reflected sunlight, mainly due to an aerosol-induced increase in cloud cover. This observational evidence of a strong aerosol impact suggests that the Earth’s climate is highly sensitive to external forcing mechanisms, but also that mitigation of global warming via MCB is more plausible than current climate models suggest. Our results suggest that the best efficacy for MCB practice is to seed clouds in humid and stable meteorological conditions.en_US
dc.description.sponsorshipYC is supported by the start-up fund from the University of Birmingham. AP, JH, DP, DG and PF are supported by the UKRI Natural Environment Research Council (NERC) funded ADVANCE project (NE/T006897/1). YW would like to thank the support from the ETH Zurich Foundation (ETH Fellowship project: 2021-HS-332) and Mr. Philippe Sarasin. JH, GJ and FM were also part funded under funding provided by the EU's Horizon 2020 research and innovation programme under the CONSTRAIN grant agreement 820829. JH, PF, GJ and FM are supported by the Joint UK BEIS/Defra Met Office Hadley Centre Climate Programme (GA01101). DG is funded by the National Centre for Atmospheric Science (NCAS), one of the UK NERC’s research centres. NC, LO and SEP are funded by USA NASA programs.en_US
dc.description.urihttps://www.researchsquare.com/article/rs-3291831/v1en_US
dc.format.extent20 pagesen_US
dc.genrejournal articlesen_US
dc.genrepreprintsen_US
dc.identifierdoi:10.13016/m2wg4k-m61d
dc.identifier.urihttps://doi.org/10.21203/rs.3.rs-3291831/v1
dc.identifier.urihttp://hdl.handle.net/11603/30148
dc.language.isoen_USen_US
dc.relation.isAvailableAtThe University of Maryland, Baltimore County (UMBC)
dc.relation.ispartofUMBC GESTAR II Collection
dc.relation.ispartofUMBC Faculty Collection
dc.rightsThis work was written as part of one of the author's official duties as an Employee of the United States Government and is therefore a work of the United States Government. In accordance with 17 U.S.C. 105, no copyright protection is available for such works under U.S. Law.en_US
dc.rightsPublic Domain Mark 1.0*
dc.rights.urihttp://creativecommons.org/publicdomain/mark/1.0/*
dc.titleEvidence that deliberate marine cloud brightening can be more effective than previously thoughten_US
dc.typeTexten_US
dcterms.creatorhttps://orcid.org/0000-0001-6401-2391en_US

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