Patricia Castellanos

Patricia Castellanos

  • Research AST, Meteorological Studies
  • 301.614.6574
  • NASA/GSFC
  • Mail Code: 610.1
  • Greenbelt , MD 20771
  • Employer: NASA
  • Brief Bio

    Dr. Patricia Castellanos is a Research Meteorologist at the Global Modeling and Assimilation Office (GMAO), NASA/Goddard Space Flight Center, where she has worked since 2015. Prior to joining the GMAO, Dr. Castellanos received BS degrees in Chemistry and Mathematics, followed by a PhD in Chemical Engineering from the University of Maryland, College Park. Her thesis focused on analyzing regional chemical transport models for the Northeast US with suborbital observations from surface sites and aircraft. In 2010 she moved to the Netherlands to learn more about remote sensing, and worked on analyzing OMI NO2 observations at the Royal Netherlands Meteorological Institute (KNMI). This was followed by three years at the Vrije Universiteit (VU) Amsterdam working on using satellite observations of trace gasses and aerosols to improve fire emissions modeling. Upon joining the GMAO in 2015, Dr. Castellanos has focused on developing the aerosol modeling and assimilation capabilities within GEOS, and combining GEOS with radiative transfer models for observing system simulation studies to support future NASA missions. Dr. Castellanos collaborates with groups across several labs to apply simulated observations to missions such as TEMPO, GEOS, PACE, and the AOS constellation. She is currently a co-lead of the Early Mid-Career Council (EMC2) and the 610 Group Mentoring Program.

    Research Interests

    Observing System Simulation Experiments for Atmospheric Composition and Ocean Biogeochemistry

    Building radiative transfer applications to run on NASA’s high performance computing cluster that simulate the sampling and spectral characteristics of future satellites missions. The software generates high resolution and time resolved synthetic top of the atmosphere radiances for UV-Vis remote sensing instruments. The data product is being used in Observing System Simulation Experiments (OSSEs) by scientists to prototype retrieval algorithms for upcoming satellite missions. The software has been applied to TEMPO, GOES, PACE, and the AOS constellation.  

    Global Aerosol Modeling and Data Assimilation

    Development of global aerosol models and applications of satellite measurements in such models for air-quality forecasting, historical reanalyses, and observing system simulations in support of future NASA space missions. Curtent activities include analysis of the representation of aerosol optical properties in the GEOS earth system model, and use of machine learning algorithms for the assimilation of aerosol observations.

    Education

    PhD in Chemical Engineering, University of Maryland College Park. Thesis: Analysis of Air Quality with Numerical Simulations (CMAQ) and Observations of Trace Gases

    BS in Mathematics, 2003, University of Maryland College Park

    BS in Chemistry, 2003, University of Maryland College Park

    Publications

    Refereed

    LeBlanc, S. E., M. Segal-Rozenhaimer, J. Redemann, et al. C. Flynn, R. R. Johnson, S. E. Dunagan, R. Dahlgren, J. Kim, M. Choi, A. da Silva, P. Castellanos, Q. Tan, L. Ziemba, K. Lee Thornhill, and M. Kacenelenbogen. 2022. "Airborne observations during KORUS-AQ show that aerosol optical depths are more spatially self-consistent than aerosol intensive properties." Atmospheric Chemistry and Physics, 22 (17): 11275-11304 [10.5194/acp-22-11275-2022]

    Fasnacht, Z., J. Joiner, D. Haffner, et al. W. Qin, A. Vasilkov, P. Castellanos, and N. Krotkov. 2022. "Using Machine Learning for Timely Estimates of Ocean Color Information From Hyperspectral Satellite Measurements in the Presence of Clouds, Aerosols, and Sunglint." Frontiers in Remote Sensing, 3: [10.3389/frsen.2022.846174]

    Thompson, S. N., B. van Diedenhoven, P. R. Colarco, et al. P. Castellanos, E. Lian, and J. V. Martins. 2022. "Analysis of Scattering Angle Sampling by Multi-Angle Imaging Polarimeters for Different Orbit Geometries." Frontiers in Remote Sensing, 3: [10.3389/frsen.2022.836262]

    Vasilkov, A., N. Krotkov, E.-S. Yang, et al. L. Lamsal, J. Joiner, P. Castellanos, Z. Fasnacht, and R. Spurr. 2021. "Explicit and consistent aerosol correction for visible wavelength satellite cloud and nitrogen dioxide retrievals based on optical properties from a global aerosol analysis." Atmospheric Measurement Techniques, 14 (4): 2857-2871 [10.5194/amt-14-2857-2021]

    Veselovskii, I., Q. Hu, P. Goloub, et al. T. Podvin, M. Korenskiy, Y. Derimian, M. Legrand, and P. Castellanos. 2020. "Variability in lidar-derived particle properties over West Africa due to changes in absorption: towards an understanding." Atmospheric Chemistry and Physics, 20 (11): 6563-6581 [10.5194/acp-20-6563-2020]

    Chong, H., S. Lee, J. Kim, et al. U. Jeong, C. Li, N. A. Krotkov, C. R. Nowlan, J. A. Al-Saadi, S. J. Janz, M. G. Kowalewski, M.-H. Ahn, M. Kang, J. Joiner, D. P. Haffner, L. Hu, P. Castellanos, L. G. Huey, M. Choi, C. H. Song, K. M. Han, and J.-H. Koo. 2020. "High-resolution mapping of SO2 using airborne observations from the GeoTASO instrument during the KORUS-AQ field study: PCA-based vertical column retrievals." Remote Sensing of Environment, 241: 111725 [10.1016/j.rse.2020.111725]

    Castellanos, P., and A. da Silva. 2019. "A Neural Network Correction to the Scalar Approximation in Radiative Transfer." Journal of Atmospheric and Oceanic Technology, 36 (5): 819-832 [10.1175/jtech-d-18-0003.1]

    Castellanos, P., A. da Silva, A. Darmenov, et al. V. Buchard, R. Govindaraju, P. Ciren, and S. Kondragunta. 2018. "A Geostationary Instrument Simulator for Aerosol Observing System Simulation Experiments." Atmosphere, 10 (1): 2 [10.3390/atmos10010002]

    Veselovskii, I., P. Goloub, T. Podvin, et al. D. Tanre, A. da Silva, P. Colarco, P. Castellanos, M. Korenskiy, Q. Hu, D. N. Whiteman, D. Pérez-Ramírez, P. Augustin, M. Fourmentin, and A. Kolgotin. 2018. "Characterization of smoke and dust episode over West Africa: comparison of MERRA-2 modeling with multiwavelength Mie–Raman lidar observations." Atmospheric Measurement Techniques, 11 (2): 949-969 [10.5194/amt-11-949-2018]

    Castellanos, P., K. F. Boersma, O. Torres, and J. F. de Haan. 2015. "OMI tropospheric NO2 air mass factors over South America: effects of biomass burning aerosols." Atmospheric Measurement Techniques, 8 (9): 3831-3849 [10.5194/amt-8-3831-2015]

    Castellanos, P., K. F. Boersma, and G. R. van der Werf. 2014. "Satellite observations indicate substantial spatiotemporal variability in biomass burning NO<sub>x</sub> emission factors for South America." Atmospheric Chemistry and Physics, 14 (8): 3929-3943 [10.5194/acp-14-3929-2014]

    Castellanos, P., and K. F. Boersma. 2012. "Reductions in nitrogen oxides over Europe driven by environmental policy and economic recession." Scientific Reports, 2 (1): 265 [10.1038/srep00265]

    Castellanos, P., L. T. Marufu, B. G. Doddridge, et al. B. F. Taubman, J. J. Schwab, J. C. Hains, S. H. Ehrman, and R. R. Dickerson. 2011. "Ozone, oxides of nitrogen, and carbon monoxide during pollution events over the eastern United States: An evaluation of emissions and vertical mixing." Journal of Geophysical Research, 116 (D16): D16307 [10.1029/2010jd014540]

    Castellanos, P., W. T. Luke, P. Kelley, et al. J. W. Stehr, S. H. Ehrman, and R. R. Dickerson. 2009. "Modification of a commercial cavity ring-down spectroscopy NO2 detector for enhanced sensitivity." Review of Scientific Instruments, 80 (11): 113107 [10.1063/1.3244090]

    Castellanos, P., J. W. Stehr, R. R. Dickerson, and S. H. Ehrman. 2009. "The sensitivity of modeled ozone to the temporal distribution of point, area, and mobile source emissions in the eastern United States." Atmospheric Environment, 43 (30): 4603-4611 [10.1016/j.atmosenv.2009.05.045]

    Castellanos, P., A. I. Norman, and S. C. Greer. 2006. "Conformational Change of Poly(ethylene Glycol) near the Critical Point of Isobutyric Acid + Water." The Journal of Physical Chemistry B, 110 (44): 22172-22177 [10.1021/jp056154o]

    Brief Bio

    Dr. Patricia Castellanos is a Research Meteorologist at the Global Modeling and Assimilation Office (GMAO), NASA/Goddard Space Flight Center, where she has worked since 2015. Prior to joining the GMAO, Dr. Castellanos received BS degrees in Chemistry and Mathematics, followed by a PhD in Chemical Engineering from the University of Maryland, College Park. Her thesis focused on analyzing regional chemical transport models for the Northeast US with suborbital observations from surface sites and aircraft. In 2010 she moved to the Netherlands to learn more about remote sensing, and worked on analyzing OMI NO2 observations at the Royal Netherlands Meteorological Institute (KNMI). This was followed by three years at the Vrije Universiteit (VU) Amsterdam working on using satellite observations of trace gasses and aerosols to improve fire emissions modeling. Upon joining the GMAO in 2015, Dr. Castellanos has focused on developing the aerosol modeling and assimilation capabilities within GEOS, and combining GEOS with radiative transfer models for observing system simulation studies to support future NASA missions. Dr. Castellanos collaborates with groups across several labs to apply simulated observations to missions such as TEMPO, GEOS, PACE, and the AOS constellation. She is currently a co-lead of the Early Mid-Career Council (EMC2) and the 610 Group Mentoring Program.

    Publications

    Refereed

    LeBlanc, S. E., M. Segal-Rozenhaimer, J. Redemann, et al. C. Flynn, R. R. Johnson, S. E. Dunagan, R. Dahlgren, J. Kim, M. Choi, A. da Silva, P. Castellanos, Q. Tan, L. Ziemba, K. Lee Thornhill, and M. Kacenelenbogen. 2022. "Airborne observations during KORUS-AQ show that aerosol optical depths are more spatially self-consistent than aerosol intensive properties." Atmospheric Chemistry and Physics 22 (17): 11275-11304 [10.5194/acp-22-11275-2022]

    Fasnacht, Z., J. Joiner, D. Haffner, et al. W. Qin, A. Vasilkov, P. Castellanos, and N. Krotkov. 2022. "Using Machine Learning for Timely Estimates of Ocean Color Information From Hyperspectral Satellite Measurements in the Presence of Clouds, Aerosols, and Sunglint." Frontiers in Remote Sensing 3 [10.3389/frsen.2022.846174]

    Thompson, S. N., B. van Diedenhoven, P. R. Colarco, et al. P. Castellanos, E. Lian, and J. V. Martins. 2022. "Analysis of Scattering Angle Sampling by Multi-Angle Imaging Polarimeters for Different Orbit Geometries." Frontiers in Remote Sensing 3 [10.3389/frsen.2022.836262]

    Vasilkov, A., N. Krotkov, E.-S. Yang, et al. L. Lamsal, J. Joiner, P. Castellanos, Z. Fasnacht, and R. Spurr. 2021. "Explicit and consistent aerosol correction for visible wavelength satellite cloud and nitrogen dioxide retrievals based on optical properties from a global aerosol analysis." Atmospheric Measurement Techniques 14 (4): 2857-2871 [10.5194/amt-14-2857-2021]

    Veselovskii, I., Q. Hu, P. Goloub, et al. T. Podvin, M. Korenskiy, Y. Derimian, M. Legrand, and P. Castellanos. 2020. "Variability in lidar-derived particle properties over West Africa due to changes in absorption: towards an understanding." Atmospheric Chemistry and Physics 20 (11): 6563-6581 [10.5194/acp-20-6563-2020]

    Chong, H., S. Lee, J. Kim, et al. U. Jeong, C. Li, N. A. Krotkov, C. R. Nowlan, J. A. Al-Saadi, S. J. Janz, M. G. Kowalewski, M.-H. Ahn, M. Kang, J. Joiner, D. P. Haffner, L. Hu, P. Castellanos, L. G. Huey, M. Choi, C. H. Song, K. M. Han, and J.-H. Koo. 2020. "High-resolution mapping of SO2 using airborne observations from the GeoTASO instrument during the KORUS-AQ field study: PCA-based vertical column retrievals." Remote Sensing of Environment 241 111725 [10.1016/j.rse.2020.111725]

    Castellanos, P., and A. da Silva. 2019. "A Neural Network Correction to the Scalar Approximation in Radiative Transfer." Journal of Atmospheric and Oceanic Technology 36 (5): 819-832 [10.1175/jtech-d-18-0003.1]

    Castellanos, P., A. da Silva, A. Darmenov, et al. V. Buchard, R. Govindaraju, P. Ciren, and S. Kondragunta. 2018. "A Geostationary Instrument Simulator for Aerosol Observing System Simulation Experiments." Atmosphere 10 (1): 2 [10.3390/atmos10010002]

    Veselovskii, I., P. Goloub, T. Podvin, et al. D. Tanre, A. da Silva, P. Colarco, P. Castellanos, M. Korenskiy, Q. Hu, D. N. Whiteman, D. Pérez-Ramírez, P. Augustin, M. Fourmentin, and A. Kolgotin. 2018. "Characterization of smoke and dust episode over West Africa: comparison of MERRA-2 modeling with multiwavelength Mie–Raman lidar observations." Atmospheric Measurement Techniques 11 (2): 949-969 [10.5194/amt-11-949-2018]

    Castellanos, P., K. F. Boersma, O. Torres, and J. F. de Haan. 2015. "OMI tropospheric NO2 air mass factors over South America: effects of biomass burning aerosols." Atmospheric Measurement Techniques 8 (9): 3831-3849 [10.5194/amt-8-3831-2015]

    Castellanos, P., K. F. Boersma, and G. R. van der Werf. 2014. "Satellite observations indicate substantial spatiotemporal variability in biomass burning NO<sub>x</sub> emission factors for South America." Atmospheric Chemistry and Physics 14 (8): 3929-3943 [10.5194/acp-14-3929-2014]

    Castellanos, P., and K. F. Boersma. 2012. "Reductions in nitrogen oxides over Europe driven by environmental policy and economic recession." Scientific Reports 2 (1): 265 [10.1038/srep00265]

    Castellanos, P., L. T. Marufu, B. G. Doddridge, et al. B. F. Taubman, J. J. Schwab, J. C. Hains, S. H. Ehrman, and R. R. Dickerson. 2011. "Ozone, oxides of nitrogen, and carbon monoxide during pollution events over the eastern United States: An evaluation of emissions and vertical mixing." Journal of Geophysical Research 116 (D16): D16307 [10.1029/2010jd014540]

    Castellanos, P., W. T. Luke, P. Kelley, et al. J. W. Stehr, S. H. Ehrman, and R. R. Dickerson. 2009. "Modification of a commercial cavity ring-down spectroscopy NO2 detector for enhanced sensitivity." Review of Scientific Instruments 80 (11): 113107 [10.1063/1.3244090]

    Castellanos, P., J. W. Stehr, R. R. Dickerson, and S. H. Ehrman. 2009. "The sensitivity of modeled ozone to the temporal distribution of point, area, and mobile source emissions in the eastern United States." Atmospheric Environment 43 (30): 4603-4611 [10.1016/j.atmosenv.2009.05.045]

    Castellanos, P., A. I. Norman, and S. C. Greer. 2006. "Conformational Change of Poly(ethylene Glycol) near the Critical Point of Isobutyric Acid + Water." The Journal of Physical Chemistry B 110 (44): 22172-22177 [10.1021/jp056154o]

                                                                                                                                                                                            
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