Inversion of multi-angular polarimetric measurements over open and coastal ocean waters: a joint retrieval algorithm for aerosol and water leaving radiance properties

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dc.contributor.authorGao, Meng
dc.contributor.authorZhai, Peng-Wang
dc.contributor.authorFranz, Bryan
dc.contributor.authorHu, Yongxiang
dc.contributor.authorKnobelspiesse, Kirk
dc.contributor.authorWerdell, P. Jeremy
dc.contributor.authorIbrahim, Amir
dc.contributor.authorCairns, Brian
dc.contributor.authorChase, Alison
dc.date.accessioned2019-04-26T18:28:09Z
dc.date.available2019-04-26T18:28:09Z
dc.date.issued2019-03-26
dc.description.abstractOcean color remote sensing is a challenging task over coastal waters due to the complex optical properties of aerosols and hydrosols. In order to conduct accurate atmospheric correction, we previously implemented a joint retrieval algorithm to obtain the aerosol and water leaving signal simultaneously. The algorithm has been validated with synthetic data generated by a vector radiative transfer model and good retrieval performance has been demonstrated in terms of both aerosol and ocean water optical properties (Gao et al., 2018). In this work we applied the algorithm to airborne polarimetric measurements from the Research Scanning Polarimeter (RSP) over both open and coastal ocean waters acquired in two field campaigns: the Ship-Aircraft Bio-Optical Research (SABOR) in 2014 and the North Atlantic Aerosols and Marine Ecosystems Study (NAAMES) in 2015 and 2016. Two different yet related bio-optical models are designed for ocean water properties. One model aligns with traditional open ocean water bio-optical models that parameterize the ocean optical properties in terms of the concentration of chlorophyll a. The other is a generalized bio-optical model for coastal waters that includes seven free parameters to describe the absorption and scattering by phytoplankton, colored dissolved organic matter and non-algal particles. The retrieval errors of both aerosol optical depth and the water leaving radiance are evaluated. Through the comparisons with ocean color data products from both in situ measurements and the Moderate Resolution Imaging Spectroradiometer (MODIS), and the aerosol product from both the High Spectral Resolution Lidar (HSRL) and the Aerosol Robotic Network (AERONET), our algorithm demonstrates both flexibility and accuracy in retrieving aerosol and water leaving radiance properties under various aerosol and ocean water conditions.en_US
dc.description.sponsorshipThis research was funded by NASA Grants (80NSSC18K0345 and NNX15AK87G). Y. Hu was funded by the NASA Radiation Science program administrated by Hal Maring and the Biology and Biogeochemistry program administrated by Paula Bontempi. The authors would like to thank the NAAMES and SABOR teams, including the ship’s crew and captains of R/V Endeavor and R/V Atlantis; the NASA AERONET team and the NASA Langley team for maintaining the AERONET COVE_SEAPRISM site. The hardware used in the computational studies is part of the UMBC High Performance Computing Facility (HPCF). The facility is supported by the U.S. National Science Foundation through the MRI program (grant nos. CNS–0821258, CNS–1228778, and OAC–1726023) and the SCREMS program (grant no. DMS–0821311), with additional substantial support from the University of Maryland, Baltimore County (UMBC). See hpcf.umbc.edu for more information on HPCF and the projects using its resources.en_US
dc.description.urihttps://amt.copernicus.org/articles/12/3921/2019/en_US
dc.format.extent21 pagesen_US
dc.genrejournal articlesen_US
dc.identifierdoi:10.13016/m2kse6-mm6j
dc.identifier.citationGao, M., Zhai, P.-W., Franz, B. A., Hu, Y., Knobelspiesse, K., Werdell, P. J., Ibrahim, A., Cairns, B., and Chase, A.: Inversion of multiangular polarimetric measurements over open and coastal ocean waters: a joint retrieval algorithm for aerosol and water-leaving radiance properties, Atmos. Meas. Tech., 12, 3921–3941, https://doi.org/10.5194/amt-12-3921-2019, 2019.en_US
dc.identifier.urihttps://doi.org/10.5194/amt-12-3921-2019
dc.identifier.urihttp://hdl.handle.net/11603/13517
dc.language.isoen_USen_US
dc.publisherEGUen_US
dc.relation.isAvailableAtThe University of Maryland, Baltimore County (UMBC)
dc.relation.ispartofUMBC Physics Department Collection
dc.relation.ispartofUMBC Joint Center for Earth Systems Technology (JCET)
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.
dc.rightsPublic Domain Mark 1.0*
dc.rights.urihttps://creativecommons.org/publicdomain/mark/1.0/*
dc.subjectUMBC High Performance Computing Facility (HPCF)
dc.titleInversion of multi-angular polarimetric measurements over open and coastal ocean waters: a joint retrieval algorithm for aerosol and water leaving radiance propertiesen_US
dc.typeTexten_US
dcterms.creatorhttps://orcid.org/0000-0003-4695-5200

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