Search Results - "Spurr, Robert J.D."

VLIDORT: A linearized pseudo-spherical vector discrete ordinate radiative transfer code for forward model and retrieval studies in multilayer multiple scattering media by Spurr, Robert J.D.

“…We describe a new vector discrete ordinate radiative transfer model with a full linearization facility. The VLIDORT model is designed to generate simultaneous…”
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High-Resolution Satellite-Derived PM2.5 from Optimal Estimation and Geographically Weighted Regression over North America by van Donkelaar, Aaron, Martin, Randall V, Spurr, Robert J. D, Burnett, Richard T

“…We used a geographically weighted regression (GWR) statistical model to represent bias of fine particulate matter concentrations (PM2.5) derived from a 1 km…”
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Interpreting the Ultraviolet Aerosol Index Observed with the OMI Satellite Instrument to Understand Absorption by Organic Aerosols: Implications for Atmospheric Oxidation and Direct Radiative Effects by Hammer, Melanie S., Martin, Randall V., Donkelaar, Aaron van, Buchard, Virginie, Torres, Omar, Ridley, David A., Spurr, Robert J. D.

“…Satellite observations of the ultraviolet aerosol index (UVAI) are sensitive to absorption of solar radiation by aerosols; this absorption affects photolysis…”
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New-Generation NASA Aura Ozone Monitoring Instrument (OMI) Volcanic SO2 Dataset: Algorithm Description, Initial Results, and Continuation with the Suomi-NPP Ozone Mapping and Profiler Suite (OMPS) by Li, Can, Krotkov, Nickolay A., Carn, Simon, Zhang, Yan, Spurr, Robert J. D., Joiner, Joanna

“…Since the fall of 2004, the Ozone Monitoring Instrument (OMI) has been providing global monitoring of volcanic SO2 emissions, helping to understand their…”
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The operational cloud retrieval algorithms from TROPOMI on board Sentinel-5 Precursor by Loyola, Diego G, Gimeno García, Sebastián, Lutz, Ronny, Argyrouli, Athina, Romahn, Fabian, Spurr, Robert J. D, Pedergnana, Mattia, Doicu, Adrian, Molina García, Víctor, Schüssler, Olena

“…This paper presents the operational cloud retrieval algorithms for the TROPOspheric Monitoring Instrument (TROPOMI) on board the European Space Agency…”
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Version 2 Ozone Monitoring Instrument SO2 product (OMSO2 V2): new anthropogenic SO2 vertical column density dataset by Li, Can, Krotkov, Nickolay A, Leonard, Peter J T, Carn, Simon, Joiner, Joanna, Spurr, Robert J D, Vasilkov, Alexander

“…The Ozone Monitoring Instrument (OMI) has been providing global observations of SO2 pollution since 2004. Here we introduce the new anthropogenic SO2 vertical…”
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Volcanic SO2 plume height retrieval from UV sensors using a full-physics inverse learning machine algorithm by Efremenko, Dmitry S., Loyola R., Diego G., Hedelt, Pascal, Spurr, Robert J. D.

“…Precise knowledge of the location and height of the volcanic sulphur dioxide (SO 2 ) plume is essential for accurate determination of SO 2 emitted by volcanic…”
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Aerosol profiling using radiometric and polarimetric spectral measurements in the O2 near infrared bands: Estimation of information content and measurement uncertainties by Choi, Myungje, Sander, Stanley P., Spurr, Robert J.D., Pongetti, Thomas J., van Harten, Gerard, Drouin, Brian J., Diner, David J., Crisp, David, Eldering, Annmarie, Kalashnikova, Olga V., Jiang, Jonathan H., Hyon, Jason J., Fu, Dejian

“…Characterization of aerosol vertical distribution in the planetary boundary layer (PBL) using passive remote sensing requires advances in the current state of…”
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Synthesis of satellite (MODIS), aircraft (ICARTT), and surface (IMPROVE, EPA-AQS, AERONET) aerosol observations over eastern North America to improve MODIS aerosol retrievals and constrain surface aerosol concentrations and sources by Drury, Easan, Jacob, Daniel J., Spurr, Robert J. D., Wang, Jun, Shinozuka, Yohei, Anderson, Bruce E., Clarke, Antony D., Dibb, Jack, McNaughton, Cameron, Weber, Rodney

“…We use an ensemble of satellite (MODIS), aircraft, and ground‐based aerosol observations during the ICARTT field campaign over eastern North America in summer…”
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Sensitivity studies of nighttime top-of-atmosphere radiances from artificial light sources using a 3-D radiative transfer model for nighttime aerosol retrievals by Zhang, Jianglong, Reid, Jeffrey S., Miller, Steven D., Roman, Miguel, Wang, Zhuosen, Spurr, Robert J. D., Jaker, Shawn

“…By accounting for surface-based light source emissions and top-of-atmosphere (TOA) downward lunar fluxes, we adapted the spherical harmonics discrete ordinate…”
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Multi-core-CPU and GPU-accelerated radiative transfer models based on the discrete ordinate method by Efremenko, Dmitry S., Loyola, Diego G., Doicu, Adrian, Spurr, Robert J.D.

“…The operational processing of remote sensing data usually requires high-performance radiative transfer model (RTM) simulations. To date, multi-core CPUs and…”
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Aerosol Retrieval Sensitivity and Error Analysis for the Cloud and Aerosol Polarimetric Imager on Board TanSat: The Effect of Multi-Angle Measurement by Chen, Xi, Yang, Dongxu, Cai, Zhaonan, Liu, Yi, Spurr, Robert J D

“…Aerosol scattering is an important source of error in CO2 retrievals from satellite. This paper presents an analysis of aerosol information content from the…”
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Spatially Refined Aerosol Direct Radiative Forcing Efficiencies by Henze, Daven K, Shindell, Drew T, Akhtar, Farhan, Spurr, Robert J. D, Pinder, Robert W, Loughlin, Dan, Kopacz, Monika, Singh, Kumaresh, Shim, Changsub

“…Global aerosol direct radiative forcing (DRF) is an important metric for assessing potential climate impacts of future emissions changes. However, the…”
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A fast linearized pseudo-spherical two orders of scattering model to account for polarization in vertically inhomogeneous scattering–absorbing media by Natraj, Vijay, Spurr, Robert J.D.

“…We calculate the reflection matrix for the first two orders of scattering in a vertically inhomogeneous, scattering–absorbing medium. We take full account of…”
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Evaluation of Atmospheric Effects on Land-Surface Directional Reflectance With the Coupled RAPID and VLIDORT Models by Huaguo Huang, Wenhan Qin, Spurr, Robert J. D., Qinhuo Liu

“…In order to assess atmospheric effects on the directional reflectance of land surface, we have developed a new approach coupling the 3-D radiosity-based…”
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Direct retrieval of sulfur dioxide amount and altitude from spaceborne hyperspectral UV measurements: Theory and application by Yang, Kai, Liu, Xiong, Bhartia, Pawan K., Krotkov, Nickolay A., Carn, Simon A., Hughes, Eric J., Krueger, Arlin J., Spurr, Robert J. D., Trahan, Samuel G.

“…We describe the physical processes by which a vertically localized absorber perturbs the top-of-atmosphere solar backscattered ultraviolet (UV) radiance. The…”
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Development of an Ozone Monitoring Instrument (OMI) aerosol index (AI) data assimilation scheme for aerosol modeling over bright surfaces – a step toward direct radiance assimilation in the UV spectrum by Zhang, Jianglong, Spurr, Robert J. D., Reid, Jeffrey S., Xian, Peng, Colarco, Peter R., Campbell, James R., Hyer, Edward J., Baker, Nancy L.

“…Using the Vector LInearized Discrete Ordinate Radiative Transfer (VLIDORT) code as the main driver for forward model simulations, a first-of-its-kind data…”
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Improved algorithm for MODIS satellite retrievals of aerosol optical depths over western North America by Drury, Easan, Jacob, Daniel J., Wang, Jun, Spurr, Robert J. D., Chance, Kelly

“…Quantitative evaluation of chemical transport models (CTMs) with aerosol optical depth (AOD) products retrieved from satellite backscattered reflectances can…”
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Optimal estimation for global ground-level fine particulate matter concentrations by van Donkelaar, Aaron, Martin, Randall V., Spurr, Robert J. D., Drury, Easan, Remer, Lorraine A., Levy, Robert C., Wang, Jun

“…We develop an optimal estimation (OE) algorithm based on top‐of‐atmosphere reflectances observed by the MODIS satellite instrument to retrieve near‐surface…”
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Acceleration of radiative transfer model calculations for the retrieval of trace gases under cloudy conditions by Efremenko, Dmitry S., Loyola, Diego G., Spurr, Robert J.D., Doicu, Adrian

“…In the independent pixel approximation (IPA), radiative transfer computations involving cloudy scenes require two separate calls to the radiative transfer…”
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