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Greg Schuster
NASA Langley Research Center

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Research Interests

  • My research interests include active and passive remote sensing of aerosols (including black carbon concentration, water uptake, composition, and size), improvement of aerosol optics modules in chemical transport models and general circulation models, the study of the aerosol indirect effect through statistical observations of aerosols near clouds (favoring approaches that constrain the meteorology), and quantifying regional lidar ratios of dust.

Aerosol composition retrievals

Recent Publications

  • Schuster, G., Espinosa, W., Ziemba, L., Beyersdorf, A., Rocha-Lima, A., Anderson, B., Martins, J., Dubovik, O., Ducos, F., Fuertes, D., Lapyonok, T., Shook, M., Derimian, Y., and Moore, R.: A Laboratory Experiment for the Statistical Evaluation of Aerosol Retrieval (STEAR) Algorithms, Remote Sensing, 11, 498,, 2019.
  • Samset, B., Stjern, C., Andrews, E., Kahn, R., Myhre, G., Schulz, M., and Schuster, G.: Aerosol Absorption: Progress Towards Global and Regional Constraints, Curr Clim Change Rep, 4,, 2018.
  • Wang, R., Andrews, E., Balkanski, Y., Boucher, O., Myhre, G., Samset, B., Schulz, M., Schuster, G., Valari, M., and Tao, S.: Spatial Representativeness Error in the Ground-Level Observation Networks for Black Carbon Radiation Absorption, Geophys. Res. Lett., 45, 21062114,, 2018.
  • Torres, B., Dubovik, O., Fuertes, D., Schuster, G., Cachorro, V., Lapyonok, T., Goloub, P., Blarel, L., Barreto, A., Mallet, M., Toledano, C., and Tanré, D.: Advanced characterisation of aerosol size properties from measurements of spectral optical depth using the GRASP algorithm, Atmos. Meas. Tech., 10, 37433781,, 2017.
  • Espinosa, W.R., L. Remer, O. Dubovik, L. Ziemba, A. Beyersdorf, F.D. Orozco, G. Schuster, T. Lapyonok, D. Fuertes, J.V. Martins, Retrievals of aerosol optical and microphysical properties from Imaging Polar Nephelometer scattering measurements, Atmos. Meas. Tech., 10, 811-824, doi:10.5194/amt-10-811-2017, 2017.
  • Schuster, G.L., O. Dubovik, and A. Arola; Remote sensing of soot carbon -- Part 1: Distinguishing different absorbing aerosol species, Atmos. Chem. Phys., 16, 1565-1585, doi:10.5194/acp-16-1565-2016, 2016.
  • Schuster, G.L., O. Dubovik, A. Arola, T. Eck, and B. Holben; Remote sensing of soot carbon -- Part 2: Understanding the absorption Ångström exponent, Atmos. Chem. Phys., 16, 1587-1602, doi:10.5194/acp-16-1587-2016, 2016.
  • Kazadzis, S., Raptis, P., Kouremeti, N., Amiridis, V., Arola, A., Gerasopoulos, E., and Schuster, G. L.: Aerosol absorption retrieval at ultraviolet wavelengths in a complex environment, Atmos. Meas. Tech., 9, 5997-6011, doi:10.5194/amt-9-5997-2016, 2016.
  • Wang, R., Y. Balkanski, O. Boucher, P. Ciais, G. L. Schuster, F. Chevallier, B. H. Samset, J. Liu, S. Piao, M. Valari, and S. Tao; Estimation of black carbon direct radiative forcing and its uncertainty constrained by observations, J. Geophys. Res., 121, 5948-5971, doi:10.1002/2015JD024326, 2016.
  • Arola, A., G.L. Schuster, M.R.A. Pitka -nen, O. Dubovik, H. Kokkola, A.V Lindfors, T. Mielonen, T. Raatikainen, S. Romakkaniemi, S.N. Tripathi, and H. Lihavainen, Direct radiative effect by brown carbon over Indo-Gangetic Plain, Atmos. Chem. Phys., 15, 1273112740, doi:10.5194/acp- 15-12731-2015.
  • Nisantzi, A., R. E. Mamouri, A. Ansmann, G. L. Schuster, and D. G. Hadjimitsis, Middle East versus Saharan dust extinction-to-backscatter ratios, Atmos. Chem. Phys., 15, 7071-7084, doi:10.5194/acp- 15-7071-2015, 2015.
  • Liu, Z., D. Winker, A. Omar, M. Vaughan, J. Kar, C. Trepte, Y. Hu, G. Schuster (2015), Evaluation of CALIOP dust AOD retrieval over opaque water clouds and modeled lidar ratio, Atmos. Chem. Phys., 15, 1265-1288.
  • Russell, P., M. Kacenelenbogen, J. Livingston, O. Hasekamp, S. Burton, G. Schuster, M. Johnson, K. Knobelspiesse, J. Redemann, S. Ramchandran, and B.N. Holben (2014), A Multi-Parameter Aerosol Classification Method and its Application to Retrievals from Spaceborne Polarimetry, J. Geophys. Res., 119, doi:10.1002/2013JD021411.
  • Chin, M., T. Diehl, Q. Tan, J. M. Prospero, R. A. Kahn, L. A. Remer, H. Yu, A. M. Sayer, H. Bian, I. V. Geogdzhayev, B. N. Holben, S. G. Howell, B. J. Huebert, N. C. Hsu, D. Kim, T. L. Kucsera, R. C. Levy, M. I. Mishchenko, X. Pan, P. K. Quinn, G. L. Schuster, D. G. Streets, S. A. Strode, O. Torres, and X.-P. Zhao, Multi-decadal variations of atmospheric aerosols from 1980 to 2009: sources and regional trends, Atmos. Chem. Phys., 14, 3657-3690, 2014.
  • Li, Z.Q., X. Gu, L. Wang, D. Li, K. Li, O. Dubovik, G. Schuster, P. Goloub, Y. Zhang, L. Li, Y. Xie, Y. Ma, and H. Xu, Aerosol physical and chemical properties retrieved from ground-based remote sensing measurements during heavy haze days in Beijing winter, Atmos. Chem. Phys., 13, 10171-10183, 2013.
  • Su, W., N. G. Loeb, G. L. Schuster, M. Chin, and F. G. Rose (2013), Global all-sky shortwave direct radiative forcing of anthropogenic aerosols from combined satellite observations and GOCART simulations, J. Geophys. Res. Atmos., 118, 655-669, doi:10.1029/2012JD018294.
  • Schuster, G.L., M. Vaughan, D. MacDonnell, W. Su, D. Winker, O. Dubovik, T. Lapyonok, and C. Trepte; Comparison of CALIPSO aerosol optical depth retrievals to AERONET measurements, and a climatology for the lidar ratio of dust, Atmos. Chem. Phys. Discuss., 12, 11641-11697, 2012.
  • Arola, A., G. Schuster, G. Myhre, S. Kazadzis, S. Dey, and S.N. Tripathi; Inferring absorbing organic carbon content from AERONET data, Atmos. Chem. Phys., 11, 215-225, 2011.
  • Schuster, G. L., B. Lin, O. Dubovik, Remote sensing of aerosol water uptake, Geophys. Res. Lett., 36, L03814, doi:10.1029/2008GL036576, 2009.
  • Koch, D., M. Schulz, S. Kinne, C. McNaughton, J.R. Spackman, Y. Balkanski, S. Bauer, T. Berntsen, T.C. Bond, O. Boucher, M. Chin, A. Clarke, N. De Luca, F. Dentener, T. Diehl, O. Dubovik, R. Easter, D.W. Fahey, J. Feichter, D. Fillmore, S. Frietag, S.Ghan, P. Ginoux, S. Gong, L. Horowitz, T. Iversen, A. Kirkevag, Z. Klimont, Y. Kondo, M. Krol, X. Liu, R. Miller, V. Mon- tanaro, N. Moteki, G. Myhre, J.E. Penner, J. Perlwitz, G. Pitari, S. Reddy, L. Sahu, H. Sakamoto, G. Schuster, J.P. Schwartz, O. Seland, P. Stier, N. Takegawa, T. Takemura, C. Textor, J.A. van Aardenne, Y. Zhao, Evaluation of black carbon estimations in global aerosol models, Atmos. Chem. Phys., 9, 9001-9026, 2009.
  • Schuster, G. L., O. Dubovik, B. N. Holben; Angstrom Exponent and Bimodal Aerosol Size Distributions, J.Geophys. Res., 111, D07207, doi:10.1029/2005JD006328, 2006.
  • Schuster, G. L., O. Dubovik, B. N. Holben, and E. E. Clothiaux; Inferring black carbon content and specific absorption from Aerosol Robotic Network (AERONET) aerosol retrievals, J. Geophys. Res.,110, D10S17, doi:10.1029/2004JD004548, 2005.
  • Link to PhD Thesis at Penn State.


  • I gratefully acknowledge the efforts of the entire AERONET/PHOTONS teams, and the instrument principal investigators.