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    Academic Journals

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• The CHROMA cloud-top pressure retrieval algorithm for the Plankton, Aerosol, Cloud, ocean Ecosystem (PACE) satellite mission.

  Authors:Andrew M. Sayer, Luca Lelli, Brian Cairns, Bastiaan van Diedenhoven, Amir Ibrahim, Kirk D. Knobelspiesse, et al.From:Atmospheric Measurement Techniques (Vol. 16, Issue 4) Peer-Reviewed

  Feb. 23, 2023321 words Brief article This paper provides the theoretical basis and simulated retrievals for the Cloud Height Retrieval from O.sub.2 Molecular Absorption (CHROMA) algorithm. Simulations are performed for the Ocean Color Instrument (OCI),...

• Circular polarization in atmospheric aerosols.

  Authors:Santiago Gassó and Kirk D. KnobelspiesseFrom:Atmospheric Chemistry and Physics (Vol. 22, Issue 20) Peer-Reviewed

  Oct. 20, 2022368 words Brief article Recent technological advances have demonstrated the feasibility of deploying spaceborne optical detectors with full polarimetric capabilities. The measurement of all four Stokes coefficients opens significant new...

• Effective uncertainty quantification for multi-angle polarimetric aerosol remote sensing over ocean.

  Authors:Meng Gao, Kirk Knobelspiesse, Bryan A. Franz, Peng-Wang Zhai, Andrew M. Sayer, Amir Ibrahim, et al.From:Atmospheric Measurement Techniques (Vol. 15, Issue 16) Peer-Reviewed

  Aug. 25, 2022316 words Brief article Multi-angle polarimetric (MAP) measurements can enable detailed characterization of aerosol microphysical and optical properties and improve atmospheric correction in ocean color remote sensing. Advanced retrieval...

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

  Authors:Meng Gao, Peng-Wang Zhai, Bryan A. Franz, Yongxiang Hu, Kirk Knobelspiesse, P. Jeremy Werdell, et al.From:Atmospheric Measurement Techniques (Vol. 12, Issue 7) Peer-Reviewed

  July 17, 2019335 words Brief article

  Ocean 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...

• Inversion of multiangular polarimetric measurements from the ACEPOL campaign: an application of improving aerosol property and hyperspectral ocean color retrievals.

  Authors:Meng Gao, Peng-Wang Zhai, Bryan A. Franz, Kirk Knobelspiesse, Amir Ibrahim, Brian Cairns, et al.From:Atmospheric Measurement Techniques (Vol. 13, Issue 7) Peer-Reviewed

  July 22, 2020375 words Brief article NASA's Plankton, Aerosol, Cloud, ocean Ecosystem (PACE) mission, scheduled for launch in the time frame of late 2022 to early 2023, will carry the Ocean Color Instrument (OCI), a hyperspectral scanning radiometer, and...

• Low-level liquid cloud properties during ORACLES retrieved using airborne polarimetric measurements and a neural network algorithm.

  Authors:Daniel J. Miller, Michal Segal-Rozenhaimer, Kirk Knobelspiesse, Jens Redemann, Brian Cairns, Mikhail Alexandrov, et al.From:Atmospheric Measurement Techniques (Vol. 13, Issue 6) Peer-Reviewed

  June 29, 2020404 words Article In this study we developed a neural network (NN) that can be used to retrieve cloud microphysical properties from multiangular and multispectral polarimetric remote sensing observations. This effort builds upon our...

• Efficient multi-angle polarimetric inversion of aerosols and ocean color powered by a deep neural network forward model.

  Authors:Meng Gao, Bryan A. Franz, Kirk Knobelspiesse, Peng-Wang Zhai, Vanderlei Martins, Sharon Burton, et al.From:Atmospheric Measurement Techniques (Vol. 14, Issue 6) Peer-Reviewed

  June 4, 2021409 words Article NASA's Plankton, Aerosol, Cloud, ocean Ecosystem (PACE) mission, scheduled for launch in the timeframe of 2023, will carry a hyperspectral scanning radiometer named the Ocean Color Instrument (OCI) and two multi-angle...

• Aerosol retrievals from different polarimeters during the ACEPOL campaign using a common retrieval algorithm

  Authors:Guangliang Fu, Otto Hasekamp, Jeroen Rietjens, Martijn Smit, Antonio Di Noia, Brian Cairns, et al.From:Atmospheric Measurement Techniques (Vol. 13, Issue 2) Peer-Reviewed

  Feb. 7, 2020457 words Brief article, Repor... In this paper, we present aerosol retrieval results from the ACEPOL (Aerosol Characterization from Polarimeter and Lidar) campaign, which was a joint initiative between NASA and SRON - the Netherlands Institute for...

• The Aerosol Characterization from Polarimeter and Lidar (ACEPOL) airborne field campaign.

  Authors:Kirk Knobelspiesse, Henrique M. J. Barbosa, Christine Bradley, Carol Bruegge, Brian Cairns, Gao Chen, et al.From:Earth System Science Data (Vol. 12, Issue 3) Peer-Reviewed

  Sept. 14, 2020319 words Brief article In the fall of 2017, an airborne field campaign was conducted from the NASA Armstrong Flight Research Center in Palmdale, California, to advance the remote sensing of aerosols and clouds with multi-angle polarimeters...

• Analysis of shipboard aerosol optical thickness measurements from multiple sunphotometers aboard the R/V Ronald H. Brown during the Aerosol Characterization Experiment--Asia

  Authors:Mark A. Miller, Kirk Knobelspiesse, Robert Frouin, Mary Jane Bartholomew, R. Michael Reynolds, Christophe Pietras, et al.From:Applied Optics (Vol. 44, Issue 18) Peer-Reviewed

  June 20, 2005193 words Author abstract

   Abstract Only

• Remote sensing of aerosols with small satellites in formation flight

  Authors:Kirk Knobelspiesse and Sreeja NagFrom:Atmospheric Measurement Techniques (Vol. 11, Issue 7) Peer-Reviewed

  July 6, 2018440 words Author abstract, Bri...

  Determination of aerosol optical properties with orbital passive remote sensing is a difficult task, as observations often have limited information. Multi-angle instruments, such as the Multi-angle Imaging...

• Comparisons of bispectral and polarimetric retrievals of marine boundary layer cloud microphysics: case studies using a LES-satellite retrieval simulator

  Authors:Daniel J. Miller, Zhibo Zhang, Steven Platnick, Andrew S. Ackerman, Frank Werner, Celine Cornet, et al.From:Atmospheric Measurement Techniques (Vol. 11, Issue 6) Peer-Reviewed

  June 26, 2018406 words Brief article Many passive remote-sensing techniques have been developed to retrieve cloud microphysical properties from satellite-based sensors, with the most common approaches being the bispectral and polarimetric techniques. These...

• How should we aggregate data? Methods accounting for the numerical distributions, with an assessment of aerosol optical depth.

  Authors:Andrew M. Sayer and Kirk D. KnobelspiesseFrom:Atmospheric Chemistry and Physics (Vol. 19, Issue 23) Peer-Reviewed

  Dec. 11, 2019580 words Article Many applications of geophysical data - whether from surface observations, satellite retrievals, or model simulations - rely on aggregates produced at coarser spatial (e.g. degrees) and/or temporal (e.g. daily and...

• An overview of the ORACLES (ObseRvations of Aerosols above CLouds and their intEractionS) project: aerosol-cloud-radiation interactions in the southeast Atlantic basin.

  Authors:Jens Redemann, Robert Wood, Paquita Zuidema, Sarah J. Doherty, Bernadette Luna, Samuel E. LeBlanc, et al.From:Atmospheric Chemistry and Physics (Vol. 21, Issue 3) Peer-Reviewed

  Feb. 4, 2021359 words Brief article Southern Africa produces almost a third of the Earth's biomass burning (BB) aerosol particles, yet the fate of these particles and their influence on regional and global climate is poorly understood. ORACLES...

• THE PLANKTON, AEROSOL, CLOUD, OCEAN ECOSYSTEM MISSION: Status, Science, Advances: The PACE mission represents NASA's next investment in ocean color, cloud, and aerosol data records to enable continued and advanced insight into oceanographic and atmospheric responses to Earth's changing climate.

  Authors:P. Jeremy Werdell, Michael J. Behrenfeld, Paula S. Bontempi, Emmanuel Boss, Brian Cairns, Gary T. Davis, et al.From:Bulletin of the American Meteorological Society (Vol. 100, Issue 9) Peer-Reviewed

  Sept. 201912,725 words Article 1580LABSTRACTS The Plankton, Aerosol, Cloud, ocean Ecosystem (PACE) mission represents the National Aeronautics and Space Administration's (NASA) next investment in satellite ocean color and the study of Earth's...

• How should we aggregate data? Methods accounting for the numerical distributions, with an assessment of aerosol optical depth.

  Authors:Andrew M. Sayer and Kirk D. KnobelspiesseFrom:Atmospheric Chemistry and Physics (Vol. 19, Issue 23) Peer-Reviewed

  Dec. 11, 2019580 words Article Many applications of geophysical data - whether from surface observations, satellite retrievals, or model simulations - rely on aggregates produced at coarser spatial (e.g. degrees) and/or temporal (e.g. daily and...