Global Reduction in Ship-tracks from Sulfur Regulations for Shipping Fuel

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dc.contributor.authorYuan, Tianle
dc.contributor.authorSong, Hua
dc.contributor.authorWood, Robert
dc.contributor.authorWang, Chenxi
dc.contributor.authorOreopoulos, Lazaros
dc.contributor.authorPlatnick, Steven
dc.contributor.authorHippel, Sophia von
dc.contributor.authorMeyer, Kerry
dc.contributor.authorLight, Siobhan
dc.contributor.authorWilcox, Eric
dc.date.accessioned2022-07-14T23:18:31Z
dc.date.available2022-07-14T23:18:31Z
dc.date.issued2022-06-11
dc.description.abstractShip-tracks are produced by ship-emitted aerosols interacting with marine low clouds. Here we apply deep learning models on satellite data to produce the first multi-year global climatology map of ship-tracks. We show that ship-tracks are at the nexus of cloud physics, maritime shipping, and fuel regulation. Our map captures major shipping lanes while missing others, reflecting the influences of background cloud and aerosol properties. Ship-track frequency is more than 10 times higher than expected from a previous survey. Interannual fluctuations in ship-track frequency reflect variations in cross-ocean trade, shipping activity, and fuel regulations. Fuel regulation can alter both detected ship-track density and pattern of shipping routes due to cost economics. The new fuel regulation, together with the COVID-19 pandemic, reduced ship-track frequency in 2020 to its lowest level in recent decades across the globe and may have ushered in a new era of low ship-track frequency. We estimate the aerosol indirect forcing induced by the fuel regulation to be between 0.02 and 0.22 Wm-2.en_US
dc.description.urihttps://arxiv.org/abs/2206.05382en_US
dc.format.extent20 pagesen_US
dc.genrejournal articlesen_US
dc.genrepreprintsen_US
dc.identifierdoi:10.13016/m2fd2o-l4no
dc.identifier.urihttps://doi.org/10.48550/arXiv.2206.05382
dc.identifier.urihttp://hdl.handle.net/11603/25168
dc.language.isoen_USen_US
dc.relation.isAvailableAtThe University of Maryland, Baltimore County (UMBC)
dc.relation.ispartofUMBC Joint Center for Earth Systems Technology
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.titleGlobal Reduction in Ship-tracks from Sulfur Regulations for Shipping Fuelen_US
dc.typeTexten_US
dcterms.creatorhttps://orcid.org/0000-0002-2187-3017en_US
dcterms.creatorhttps://orcid.org/0000-0001-5136-1322en_US

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