Reduction of Spectral Radiance Reflectance During the Annular Solar Eclipse of 21 June 2020 Observed by EPIC

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dc.contributor.authorWen, Guoyong
dc.contributor.authorMarshak, Alexander
dc.contributor.authorHerman, Jay
dc.contributor.authorWu, Dong
dc.date.accessioned2023-03-23T18:21:24Z
dc.date.available2023-03-23T18:21:24Z
dc.date.issued2022-05-02
dc.description.abstractThe annular solar eclipse on 21 June 2020 passed over desert areas (parts of Central and Eastern Africa, the southern Arabian Peninsula), partly cloudy regions (parts of South Asia and the Himalayas), and the mostly cloudy region in East Asia. Moving around the Earth-Sun Lagrange point 1 (L1), the Earth Polychromatic Imaging Camera (EPIC) instrument on the Deep Space Climate Observatory (DSCOVR) spacecraft captured three sets of images of the sunlit Earth during the eclipse, allowing us to study the impact of the solar eclipse on reflected solar radiation when the underlying surface and/or cloudy conditions in the Moon’s shadow are quite different. We analyzed EPIC images acquired during the 21 June 2020 and 21 August 2017 eclipses. We found that (1) EPIC-observed average spectral as well as spectrally averaged reflectance reductions of the entire sunlit Earth during the 21 June 2020 solar eclipse are distinctly different from those during the total solar eclipse of 21 August 2017; (2) the reduction of spectral reflectance depends strongly on underlying reflector properties, including the brightness, the area coverage of each reflector in the penumbra and the average distance to the center of the Moon’s shadow.en_US
dc.description.sponsorshipThe DSCOVR EPIC project is funded by NASA Earth Science Division. GW and JH research was supported by the DSCOVR Science Management Project.en_US
dc.description.urihttps://www.frontiersin.org/articles/10.3389/frsen.2022.777314/fullen_US
dc.format.extent14 pagesen_US
dc.genrejournal articlesen_US
dc.identifierdoi:10.13016/m2xees-mrys
dc.identifier.citationWen G, Marshak A, Herman J and Wu D (2022) Reduction of Spectral Radiance Reflectance During the Annular Solar Eclipse of 21 June 2020 Observed by EPIC. Front. Remote Sens. 3:777314. doi: 10.3389/frsen.2022.777314en_US
dc.identifier.urihttps://doi.org/10.3389/frsen.2022.777314
dc.identifier.urihttp://hdl.handle.net/11603/27085
dc.language.isoen_USen_US
dc.publisherFrontiersen_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.relation.ispartofUMBC GESTAR II
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.titleReduction of Spectral Radiance Reflectance During the Annular Solar Eclipse of 21 June 2020 Observed by EPICen_US
dc.typeTexten_US
dcterms.creatorhttps://orcid.org/0000-0002-9146-1632en_US

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