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dc.contributor.authorRemer, Lorraine A.
dc.contributor.authorKnobelspiesse, Kirk
dc.contributor.authorZhai, Pengwang
dc.contributor.authorXu, Feng
dc.contributor.authorKalashnikova, Olga V.
dc.contributor.authorChowdhary, Jacek
dc.contributor.authorHasekamp, Otto
dc.contributor.authorDubovik, Oleg
dc.contributor.authorWu, Lianghai
dc.contributor.authorAhmad, Ziauddin
dc.contributor.authorBoss, Emmanuel
dc.contributor.authorCairns, Brian
dc.contributor.authorCoddington, Odele
dc.contributor.authorDavis, Anthony B.
dc.contributor.authorDierssen, Heidi M.
dc.contributor.authorDiner, David J.
dc.contributor.authorFranz, Bryan
dc.contributor.authorFrouin, Robert
dc.contributor.authorGao, Bo-Cai
dc.contributor.authorIbrahim, Amir
dc.contributor.authorLevy, Robert C.
dc.contributor.authorMartins, J. Vanderlei
dc.contributor.authorOmar, Ali H.
dc.contributor.authorTorres, Omar
dc.date.accessioned2019-10-17T15:34:29Z
dc.date.available2019-10-17T15:34:29Z
dc.date.issued2019-07-23
dc.description.abstractThe Plankton, Aerosol, Clouds, ocean Ecosystem (PACE) mission presents new opportunities and new challenges in applying observations of two complementary multi-angle polarimeters for the space-based retrieval of global aerosol properties. Aerosol remote sensing from multi-angle radiometric-only observations enables aerosol characterization to a greater degree than single-view radiometers, as demonstrated by nearly two decades of heritage instruments. Adding polarimetry to the multi-angle observations allows for the retrieval of aerosol optical depth, Angstrom exponent, parameters of size distribution, measures of aerosol absorption, complex refractive index and degree of non-sphericity of the particles, as demonstrated by two independent retrieval algorithms applied to the heritage POLarization and Directionality of the Earth's Reflectance (POLDER) instrument. The reason why this detailed particle characterization is possible is because a multi-angle polarimeter measurement contains twice the number of Degrees of Freedom of Signal (DFS) compared to an observation from a single-view radiometer. The challenges of making use of this information content involve separating surface signal from atmospheric signal, especially when the surface is optically complex and especially in the ultraviolet portion of the spectrum where we show the necessity of polarization in making that separation. The path forward is likely to involve joint retrievals that will simultaneously retrieve aerosol and surface properties, although advances will be required in radiative transfer modeling and in representing optically complex constituents in those models. Another challenge is in having the processing capability that can keep pace with the output of these instruments in an operational environment. Yet, preliminary algorithms applied to airborne multi-angle polarimeter observations offer encouraging results that demonstrate the advantages of these instruments to retrieve aerosol layer height, particle single scattering albedo, size distribution and spectral optical depth, and also show the necessity of polarization measurements, not just multi-angle radiometric measurements, to achieve these results.en_US
dc.description.sponsorshipThis work was supported by NASA Grants under the solicitation NNH13ZDA001N-PACEST. In addition, LR, RL, and OT acknowledge funding from NASA grant NNX15AD15G. OK and AD contribution was supported by the PACE science team grant, under Paula Bontempi. P-WZ acknowledges funding from NASA grant 80NSSC18K0345. OC acknowledges funding from NASA grant NNX15AC78G.en_US
dc.description.urihttps://www.frontiersin.org/articles/10.3389/fenvs.2019.00094/fullen_US
dc.format.extent21 pagesen_US
dc.genrejournal articlesen_US
dc.identifierdoi:10.13016/m2woya-baqf
dc.identifier.citationRemer LA, Knobelspiesse K, Zhai P-W, Xu F, Kalashnikova OV, Chowdhary J, Hasekamp O, Dubovik O, Wu L, Ahmad Z, Boss E, Cairns B, Coddington O, Davis AB, Dierssen HM, Diner DJ, Franz B, Frouin R, Gao B-C, Ibrahim A, Levy RC, Martins JV, Omar AH and Torres O (2019) Retrieving Aerosol Characteristics From the PACE Mission, Part 2: Multi-Angle and Polarimetry. Front. Environ. Sci. 7:94. doi: 10.3389/fenvs.2019.00094en_US
dc.identifier.urihttps://doi.org/10.3389/fenvs.2019.00094
dc.identifier.urihttp://hdl.handle.net/11603/15883
dc.language.isoen_USen_US
dc.publisherFrontiers Media S.A.en_US
dc.relation.isAvailableAtThe University of Maryland, Baltimore County (UMBC)
dc.relation.ispartofUMBC Joint Center for Earth Systems Technology
dc.rightsThis item is likely protected under Title 17 of the U.S. Copyright Law. Unless on a Creative Commons license, for uses protected by Copyright Law, contact the copyright holder or the author.
dc.rightsAttribution 4.0 International (CC BY 4.0)*
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/*
dc.subjectaerosolen_US
dc.subjectmulti-angleen_US
dc.subjectpolarimeteren_US
dc.subjectPACEen_US
dc.subjectremote sensingen_US
dc.subjectmulti-wavelengthen_US
dc.titleRetrieving Aerosol Characteristics From the PACE Mission, Part 2: Multi-Angle and Polarimetryen_US
dc.typeTexten_US


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This item is likely protected under Title 17 of the U.S. Copyright Law. Unless on a Creative Commons license, for uses protected by Copyright Law, contact the copyright holder or the author.
Except where otherwise noted, this item's license is described as This item is likely protected under Title 17 of the U.S. Copyright Law. Unless on a Creative Commons license, for uses protected by Copyright Law, contact the copyright holder or the author.