A Radiative Transfer Simulator for PACE: Theory and Applications

dc.contributor.authorZhai, Peng-Wang
dc.contributor.authorGao, Meng
dc.contributor.authorFranz, Bryan A.
dc.contributor.authorWerdell, P. Jeremy
dc.contributor.authorIbrahim, Amir
dc.contributor.authorHu, Yongxiang
dc.contributor.authorChowdhary, Jacek
dc.date.accessioned2023-03-22T21:55:12Z
dc.date.available2023-03-22T21:55:12Z
dc.date.issued2022-02-14
dc.description.abstractA radiative transfer simulator was developed to compute the synthetic data of all three instruments onboard NASA’s Plankton Aerosol, Cloud, ocean Ecosystem (PACE) observatory, and at the top of the atmosphere (TOA). The instrument suite includes the ocean color instrument (OCI), the Hyper-Angular Rainbow Polarimeter 2 (HARP2), and the Spectro-Polarimeter for Planetary Exploration 1 (SPEXone). The PACE simulator is wrapped around a monochromatic radiative transfer model based on the successive order of scattering (RTSOS), which accounts for atmosphere and ocean coupling, polarization, and gas absorption. Inelastic scattering, including Raman scattering from pure ocean water, fluorescence due to chlorophyll, and colored dissolved organic matter (CDOM), is also simulated. This PACE simulator can be used to explore the sensitivity of the hyperspectral and polarized reflectance of the Earth system with tunable atmosphere and ocean parameters, which include aerosol and cloud number concentration, refractive indices, and size distribution, ocean particle microphysical parameters, and solar and sensor-viewing geometry. The PACE simulator is used to study two important case studies. One is the impact of the significant uncertainty in pure ocean water absorption coefficient to the radiance field in the ultraviolet (UV) spectral region, which can be as much as 6%. The other is the influence of different amounts of brown carbon aerosols and CDOM on the polarized radiance field at TOA. The percentage variation of the radiance field due to CDOM is mostly for wavelengths smaller than 600 nm, while brown aerosols affect the whole spectrum from 350 to 890 nm, primarily due to covaried soot aerosols. Both case studies are important for aerosol and ocean color remote sensing and have not been previously reported in the literature.en_US
dc.description.sponsorshipThis research is partially supported by NASA Grants 80NSSC20M0227 and 80NSSC18K0345.en_US
dc.description.urihttps://www.frontiersin.org/articles/10.3389/frsen.2022.840188/fullen_US
dc.format.extent11 pagesen_US
dc.genrejournal articlesen_US
dc.identifierdoi:10.13016/m27uf0-netc
dc.identifier.citationZhai P-W, Gao M, Franz BA, Werdell PJ, Ibrahim A, Hu Y and Chowdhary J (2022) A Radiative Transfer Simulator for PACE: Theory and Applications. Front. Remote Sens. 3:840188. doi: 10.3389/frsen.2022.840188en_US
dc.identifier.urihttps://doi.org/10.3389/frsen.2022.840188
dc.identifier.urihttp://hdl.handle.net/11603/27028
dc.language.isoen_USen_US
dc.publisherFrontiersen_US
dc.relation.isAvailableAtThe University of Maryland, Baltimore County (UMBC)
dc.relation.ispartofUMBC Physics Department 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.titleA Radiative Transfer Simulator for PACE: Theory and Applicationsen_US
dc.typeTexten_US
dcterms.creatorhttps://orcid.org/0000-0003-4695-5200en_US

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