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Staff information

James Barnard

Atmospheric Chemistry & Meteorology
Pacific Northwest National Laboratory
PO Box 999
MSIN: K9-30
Richland, WA 99352

PNNL Publications


  • Kassianov EI, CJ Flynn, AS Koontz, C Sivaraman, and JC Barnard. 2013. "Failure and Redemption of Multifilter Rotating Shadowband Radiometer (MFRSR)/Normal Incidence Multifilter Radiometer (NIMFR) Cloud Screening: Contrasting Algorithm Performance at Atmospheric Radiation Measurement (ARM) North Slope of Alaska (NSA) and Southern Great Plains (SGP) Sites." Atmosphere 4(3):299-314.  doi:10.3390/atmos4030299
  • Kassianov EI, JC Barnard, MS Pekour, LK Berg, JD Fast, JJ Michalsky, K Lantz, and GB Hodges. 2013. "Temporal Variability of Aerosol Properties during TCAP: Impact on Radiative Forcing." In Remote Sensing of Clouds and the Atmosphere XVIII; and Optics in Atmospheric Propagation and Adaptive Systems XVI, September 23, 2013, Dresden, Germany. Proceedings of the SPIE, vol. 8890, ed. A Comeron, et. al., p. Paper No. 88900O.  SPIE Publishing, Bellingham, WA.  doi:10.1117/12.2029355
  • Kassianov EI, JC Barnard, MS Pekour, LK Berg, JJ Michalsky, K Lantz, and GB Hodges. 2013. "Do Diurnal Aerosol Changes Affect Daily Average Radiative Forcing?" Geophysical Research Letters 40(12):3265-3269.  doi:10.1002/grl.50567


  • Fast JD, WI Gustafson, Jr, LK Berg, WJ Shaw, MS Pekour, MKB Shrivastava, JC Barnard, R Ferrare, CA Hostetler, J Hair, MH Erickson, T Jobson, B Flowers, MK Dubey, PhD, SR Springston, BR Pirce, L Dolislager, JR Pederson, and RA Zaveri. 2012. "Transport and Mixing Patterns over Central California during the Carbonaceous Aerosol and Radiative Effects Study (CARES)." Atmospheric Chemistry and Physics 12(4):1759-1783.  doi:10.5194/acp-12-1759-2012
  • Kassianov EI, MS Pekour, and JC Barnard. 2012. "Aerosols in Central California: Unexpectedly Large Contribution of Coarse Mode to Aerosol Radiative Forcing ." Geophysical Research Letters 39:L20806.  doi:10.1029/2012GL053469
  • Zaveri RA, WJ Shaw, DJ Cziczo, B Schmid, R Ferrare, ML Alexander, M Alexandrov, RJ Alvarez, WP Arnott, D Atkinson, S Baidar, RM Banta, JC Barnard, J Beranek, LK Berg, FJ Brechtel, WA Brewer, JF Cahill, B Cairns, CD Cappa, D Chand, S China, JM Comstock, MK Dubey, RC Easter, Jr, MH Erickson, JD Fast, C Floerchinger, BA Flowers, E Fortner, JS Gaffney, MK Gilles, K Gorkowski, WI Gustafson, Jr, MS Gyawali, J Hair, M Hardesty, JW Harworth, SC Herndon, N Hiranuma, CA Hostetler, JM Hubbe, JT Jayne, H Jeong, BT Jobson, EI Kassianov, LI Kleinman, CD Kluzek, B Knighton, KR Kolesar, C Kuang, A Kubatova, AO Langford, A Laskin, NS Laulainen, RD Marchbanks, C Mazzoleni, F Mei, RC Moffet, DA Nelson, M Obland, H Oetjen, TB Onasch, I Ortega, M Ottaviani, MS Pekour, KA Prather, JG Radney, R Rogers, SP Sandberg, A Sedlacek, C Senff, G Senum, A Setyan, JE Shilling, MKB Shrivastava, C Song, SR Springston, R Subramanian, K Suski, JM Tomlinson, RM Volkamer, HA Wallace, J Wang, AM Weickmann, DR Worsnop, XY Yu, A Zelenyuk, and Q Zhang. 2012. "Overview of the 2010 Carbonaceous Aerosols and Radiative Effects Study (CARES)." Atmospheric Chemistry and Physics 12(16):7647-7687.  doi:10.5194/acp-12-7647-2012


  • Kassianov EI, JC Barnard, LK Berg, CJ Flynn, and CN Long. 2011. "Sky Cover from MFRSR Observations." Atmospheric Measurement Techniques 4(7):1463-1470.  doi:10.5194/amt-4-1463-2011
  • Kassianov EI, JC Barnard, LK Berg, CN Long, and CJ Flynn. 2011. "Shortwave Spectral Radiative Forcing of Cumulus Clouds from Surface Observations ." Geophysical Research Letters 38:Article No. L07801.  doi:10.1029/2010GL046282
  • Berg LK, CM Berkowitz, JC Barnard, G Senum, and SR Springston. 2011. "Observations of the first aerosol indirect effect in shallow cumuli." Geophysical Research Letters 38(3):Article No. L03809.  doi:10.1029/2010GL046047
  • Kassianov EI, JC Barnard, MS Pekour, CJ Flynn, R Ferrare, CA Hostetler, J Hair, and BT Jobson. 2011. "Remote Sensing of Aerosol Properties during CARES." In Proceedings of the SPIE: Remote Sensing of Clouds and the Atmosphere XVI, September 21, 2011, Prague, Czech Republic, vol. 8177, ed. EI Kassianov, p. Paper No. 81770J.  SPIE, Bellingham, WA.  doi:10.1117/12.897407


  • Kassianov EI, JC Barnard, LK Berg, CJ Flynn, and CN Long. 2010. "Retrieval of Intensive Aerosol Properties from MFRSR observations: Partly Cloudy Cases." In Remote Sensing of Clouds and the Atmosphere XV: Proceedings of the SPIE, September 21, 2010, Toulouse, France, vol. 7827, ed. RH Picard, K Schafer, A Comeron and M van Weele, p. Paper No. 7827Q.  SPIE, Bellingham, WA.  doi:10.1117/12.865761
  • Barnard JC, JD Fast, GL Paredes-Miranda, WP Arnott, and A Laskin. 2010. "Technical Note: Evaluation of the WRF-Chem "Aerosol Chemical to Aerosol Optical Properties" Module using data from the MILAGRO campaign ." Atmospheric Chemistry and Physics 10(15):7325-7340.  doi:10.5194/acp-10-7325-2010
  • Moffet RC, TR Henn, AV Tivanski, RJ Hopkins, Y Desyaterik, AL Kilcoyne, T Tyliszczak, JD Fast, JC Barnard, V Shutthanandan, SS Cliff, KD Perry, A Laskin, and MK Gilles. 2010. "Microscopic Characterization of Carbonaceous Aerosol Particle Aging in the Outflow from Mexico City." Atmospheric Chemistry and Physics 10(3):961-976. 
  • Zaveri RA, JC Barnard, RC Easter, Jr, N Riemer, and M West. 2010. "Particle-resolved simulation of aerosol size, composition, mixing state, and the associated optical and cloud condensation nuclei activation properties in an evolving urban plume." Journal of Geophysical Research. D. (Atmospheres) 115:Article No. D17210.  doi:10.1029/2009JD013616


  • McFarlane SA, EI Kassianov, JC Barnard, CJ Flynn, and TP Ackerman. 2009. "Surface shortwave aerosol radiative forcing during the Atmospheric Radiation Measurement Mobile Facility deployment in Niamey, Niger." Journal of Geophysical Research. D. (Atmospheres) 114:Art. No. D00E06.  doi:10.1029/2008JD010491
  • Chapman EG, JC Barnard, FC Rutz, MS Pekour, JP Rishel, and WJ Shaw. 2009. Dust Plume Modeling from Ranges and Maneuver Areas on Fort Bliss and the White Sands Missile Range: Final ReportPNNL-18387, Pacific Northwest National Laboratory, Richland, WA. 
  • Chapman EG, WI Gustafson, Jr, RC Easter, Jr, JC Barnard, SJ Ghan, MS Pekour, and JD Fast. 2009. "Coupling Aerosol-Cloud-Radiative Processes in the WRF-Chem Model: Investigating the Radiative Impact of Elevated Point Sources." Atmospheric Chemistry and Physics 9(3):945-964. 
  • Kassianov EI, SA McFarlane, JC Barnard, CJ Flynn, A Slingo, N Bharmal, GJ Robinson, DD Turner, M Miller, TP Ackerman, and R Miller. 2009. "International RADAGAST Experiment in Niamey, Niger: Changes and Drivers of Atmospheric Radiation Balance." In Current Problems in Atmospheric Radiation (IRS 2008): Proceedings of the International Radiation Symposium. AIP Conference Proceedings, vol. 1100, pp. 537-540.  American Institute of Physics, Melville, NY. 
  • Miller R, A Slingo, JC Barnard, and EI Kassianov. 2009. "Seasonal Contrasts in the Surface Energy Balance of the Sahel." Journal of Geophysical Research. D. (Atmospheres) 114:Art. No. D00E05.  doi:10.1029/2008JD010521


  • Barnard JC, CN Long, EI Kassianov, SA McFarlane, JM Comstock, M Freer, and G McFarquhar. 2008. "Development and Evaluation of a Simple Algorithm to Find Cloud Optical Depth with Emphasis on Thin Ice Clouds." Open Atmospheric Science Journal 2:46-55.  doi:10.2174/1874282300802010046
  • Barnard JC, RM Volkamer, and EI Kassianov. 2008. "Estimation of the Mass Absorption Cross Section of the Organic Carbon Component of Aerosols in the Mexico City Metropolitan Area." Atmospheric Chemistry and Physics 8(22):6665-6679. 
  • Doran JC, JD Fast, JC Barnard, A Laskin, Y Desyaterik, MK Gilles, and RJ Hopkins. 2008. "Applications of Lagrangian Dispersion Modeling to the Analysis of Changes in the Specific Absorption of Elemental Carbon." Atmospheric Chemistry and Physics 8(5):1377-1389. 
  • Slingo A, N Bharmal, GJ Robinson, J Settle, RP Allan, HE White, PJ Lamb, M Lele, DD Turner, SA McFarlane, EI Kassianov, JC Barnard, CJ Flynn, and M Miller. 2008. "Overview of observations from the RADAGAST experiment in Niamey, Niger: Meteorology and thermodynamic variables." Journal of Geophysical Research. D. (Atmospheres) 113(D00E01):, doi:10.1029/2008JD009909


  • Fast JD, B de Foy, FA Rosas, E Caetano, G Carmichael, L Emmons, D McKenna, M Mena, W Skamarock, X Tie, RL Coulter, JC Barnard, C Wiedinmyer, and S Madronich. 2007. "A Meteorological Overview of the MILAGRO Field Campaigns." Atmospheric Chemistry and Physics 7(9):2233-2257. 
  • Barnard JC, EI Kassianov, TP Ackerman, KS Johnson, BM Zuberi, L Molina, and MJ Molina. 2007. "Estimation of a "radiatively correct" black carbon specific absorption during the Mexico City Metropolitan Area (MCMA) 2003 field campaign ." Atmospheric Chemistry and Physics 7(6):1645-1655. 
  • Doran JC, JC Barnard, WP Arnott, R Cary, RL Coulter, JD Fast, EI Kassianov, LI Kleinman, NS Laulainen, TJ Martin, GL Paredes-Miranda, MS Pekour, WJ Shaw, DF Smith, SR Springston, and XY Yu. 2007. "The T1-T2 Study: Evolution of Aerosol Properties Downwind of Mexico City." Atmospheric Chemistry and Physics 7(6):1585-1598. 
  • Kassianov EI, CJ Flynn, TP Ackerman, and JC Barnard. 2007. "Aerosol Single-Scattering Albedo and Asymmetry Parameter from MFRSR Observations during the ARM Aerosol IOP 2003." Atmospheric Chemistry and Physics 7(12):3341-3351. 
  • Turner DD, AM Vogelmann, RT Austin, JC Barnard, K Cady-Pereira, C Chiu, SA Clough, CJ Flynn, MM Khaiyer, JC Liljegren, KL Johnson, B Lin, CN Long, A Marshak, SY Matrosov, SA McFarlane, MA Miller, Q Min, P Minnis, W O'Hirok, Z Wang, and WJ Wiscombe. 2007. "Thin Liquid Water Clouds: Their Importance and Our Challenge." Bulletin of the American Meteorological Society 88(2):177-190. 


  • Chiu JYC, A Marshak, Y Knyazikhin, WJ Wiscombe, HW Barker, JC Barnard, and Y Luo. 2006. "Remote Sensing of Cloud Properties Using Ground-Based Measurements of Zenith Radiance." Journal of Geophysical Research. D. (Atmospheres) 111(D16):D16201.  doi:10.1029/2005JD006843
  • Doran JC, JC Barnard, and WJ Shaw. 2006. "Modification of Summertime Arctic Cloud Characteristics Between a Coastal and Inland Site." Journal of Climate 19(13):3207-3219. 
  • Fast JD, WI Gustafson, Jr, RC Easter, Jr, RA Zaveri, JC Barnard, EG Chapman, G Grell, and SE Peckham. 2006. "Evolution of Ozone, Particulates, and Aerosol Direct Radiative Forcing in the Vicinity of Houston Using a Fully Coupled Meteorology-Chemistry-Aerosol Model." Journal of Geophysical Research. D. (Atmospheres) 111(D21):D21305.  doi:10.1029/2005JD006721
  • Kassianov EI, JC Barnard, and TP Ackerman. 2006. "Retrieval of Aerosol Microphysical Properties from MFRSR Observations." In IRS 2004: Current Problems in Atmospheric Radiation, Proceedings of the International Radiation Symposium, August 23-28, 2004, Busan, Korea, ed. Herbert Fischer and Byung-Ju Sohn, pp. 343-346.  A. Deepak Publishing, Hampton, VA. 
  • Michalsky JJ, G Anderson, JC Barnard, J Delamere, C Gueymard, S Kato, P Kiedron, A McComiskey, and P Ricchiazzi. 2006. "Shortwave Radiative Closure Studies for Clear Skies During the Atmospheric Radiation Measurement 2003 Aerosol Intensive Observation Period." Journal of Geophysical Research. D. (Atmospheres) 111(D14):D14S90.  doi:10.1029/2005JD006341
  • Schmid B, R Ferrare, CJ Flynn, R Elleman, D Covert, A Strawa, EJ Welton, DD Turner, H Jonsson, J Redemann, J Eilers, K Ricci, AG Hallar, MB Clayton, JJ Michalsky, A Smirnov, BN Holben, and JC Barnard. 2006. "How Well Do State-of-the-Art Techniques Measuring the Vertical Profile of Tropospheric Aerosol Extinction Compare?" Journal of Geophysical Research. D. (Atmospheres) 111(D5):D05S07, doi: 10.1029/2005JD005837. 
  • Slingo A, TP Ackerman, RP Allan, EI Kassianov, SA McFarlane, GJ Robinson, JC Barnard, M Miller, JE Harries, JE Russell, and S Dewitte. 2006. "Observations of the impact of a major Saharan dust storm on the atmospheric radiation balance." Geophysical Research Letters 33:L24817 (5 pages).  doi:10.1029/2006GL027869


  • Goering CD, TS L'Ecuyer, GL Stephens, JR Slusser, G Scott, J Davis, JC Barnard, and S Madronich. 2005. "Simultaneous Retrievals of Column Ozone and Aerosol Optical Properties from Direct and Diffuse Solar Irradiance Measurements." Journal of Geophysical Research. D. (Atmospheres) 110(D5):D05204.  doi:10.1029/2004JD005330
  • Kassianov EI, JC Barnard, and TP Ackerman. 2005. "Retrieval of Aerosol Microphysical Properties Using Surface MultiFilter Rotating Shadowband Radiometer (MFRSR) Data: Modeling and Observations." Journal of Geophysical Research. D. (Atmospheres) 110(D9):D09201, doi: 10.1029/2004JD005337. 
  • Wiscombe WJ, A Marshak, JYC Chiu, Y Knyazikhin, JC Barnard, and Y Luo. 2005. "A Novel Retrieval Algorithm for Cloud Optical Properties from the Atmopsheric Radiation Measurement Program's Two-Channel Narrow-Field-of-View Radiometer." In Fifteenth ARM Science Team Meeting Proceedings, March 14-18, 2005, Daytona Beach, Florida.  Department of Energy, Washington DC. 


  • Barnard JC, and CN Long. 2004. "A Simple Empirical Equation to Calculate Cloud Optical Thickness Using Shortwave Broadband Measurements." Journal of Applied Meteorology 43(7):1057-1066. 
  • Barnard JC, EG Chapman, JD Fast, JR Schmelzer, JR, JR Schlusser, and RE Shetter. 2004. "An Evaluation of the FAST-J Photolysis algorithm for predicting nitrogen dioxide photolysis rates under clear and cloudy sky conditions." Atmospheric Environment 38(21):3393-3403. 


  • Michalsky JJ, JR, Q Min, JC Barnard, RT Marchand, and P Pilewskie. 2003. "Simultaneous Spectral Albedo Measurements Near the Atmospheric Radiation Measurement Southern Great Plains (ARM SGP) Central Facility." Journal of Geophysical Research. D. (Atmospheres) 108(D8):4254.  doi:10.1029/2002JD002906
  • Revercomb HE, DD Turner, DC Tobin, RO Knuteson, WF Feltz, JC Barnard, J Bosenberg, SA Clough, D Cook, R Ferrare, JEM Goldsmith, S Gutman, RN Halthore, BM Lesht, JC Liljegren, H Linne, JJ Michalsky, JR, VR Morris, W Porch, S Richardson, B Schmid, ME Splitt, MA Van Hove, ER Westwater, and DN Whiteman. 2003. "The ARM Program's Water Vapor Intensive Observation Periods - Overview, Initial Accomplishments, and Future Challenges." Bulletin of the American Meteorological Society 84(2):217-236. 


  • Barnard JC, and JJ Riley. 2002. "Direct Numerical Simulations of Intermittent Turbulence in the Very Stable Ekman Layer." In 15th Symposium on Boundary Layer and Turbulence, pp. 424-427.  American Meteorological Society, Boston, MA. 
  • Barnard JC, and WJ Shaw. 2002. "Direct Numerical Simulation of Evolving Turbulence Using Surface Heat Fluxes derived from VTMX Measurements." In 10th Conference on Mountain Meteorology, pp. 122-125.  American Meteorological Society, Boston, MA. 
  • Barnard JC, and DM Flynn. 2002. "A Comparison Between Modeled and Measured Clear-Sky Radiative Shortwave Fluxes in Arctic Environments, with Special Emphasis on Diffuse Radiation." Journal of Geophysical Research. D. (Atmospheres) 107(D19):4383.  doi:10.1029/2001JD001442


  • Barnard JC, JC Liljegren, Q Min, and JC Doran. 2001. "The Use of Rotating Shadowband Radiometers and Microwave Radiometers to Obtain Cloud Properties in Arctic Environments." In 11th Symposium on Meteorological Observations and Instrumentation at the 81st Annual Meeting of the American Meteorological Society, pp. 171-175.  American Meteorological Society, Boston, MA. 
  • Barnard JC. 2001. Intermittent Turbulence in the Very Stable Ekman LayerPNNL-13416, Pacific Northwest National Laboratory, Richland, WA. 
  • Barnard JC, JC Doran, S Zhong, and CN Long. 2001. "A Comparison of Cloud Properties at Barrow and SHEBA During the Summer of 1998." In Sixth Conference on Polar Meteorology and Oceanography, 14-18 May 2001, San Diego, California, pp. 232-235.  American Meteorological Society, Boston, MA. 
  • Doran JC, JC Barnard, S Zhong, and C Jakob. 2001. "Comparison of Cloud Properties at a Coastal and Inland Site at the North Slope of Alaska." In Sixth Conference on Polar Meteorology and Oceanography, 14-18 May 2001, San Diego, California, pp. 196-199.  American Meteorological Society, Boston, MA. 
  • Michalsky JJ, JR, J Schlemmer, WE Berkheiser Iii, JL Berndt, LC Harrison, NS Laulainen, NR Larson, and JC Barnard. 2001. "Multi-Year Measurements of Aerosol Optical Depth in the Atmospheric Radiation Measurement and Quantitative Links Programs." Journal of Geophysical Research. D. (Atmospheres) 106(D11):12,099-12,107. 
  • Michalsky JJ, QL Minn, PW Kiedron, DW Slater, and JC Barnard. 2001. "A Differential Technique to Retrieve Column Water Vapor Using Sun Radiometry." Journal of Geophysical Research. D. (Atmospheres) 106(D15):17433-17442. 
  • Schmid B, JJ Michalsky, JR, DW Slater, JC Barnard, R Halthore, JC Liljegren, BN Holben, T Eck, J Livingston, P Russell, T Ingold, and I Slutsker. 2001. "Comparison of Columnar Water-Vapor Measurements from Solar Transmittance Methods." Applied Optics 40(12):1886-1896. 


  • Doran JC, JC Barnard, S Zhong, and CJ Jakob. 2000. "Cloud Optical Depths and Liquid Water Paths at the NSA CART." In Proceedings of the Tenth Atmospheric Radiation Measurement (ARM) Science Team Meeting, March 13-17, 2000 San Antonio, Texas, p. 7 pages.  US Dept. of Energy. Office of Science, Washington, DC. 
  • Peppler RA, CP Bahrmann, JC Barnard, JR Campbell, MD Cheng, RA Ferrare, RN Halthore, LA Heilman, DL Hlavka, NS Laulainen, CJ Lin, JA Ogren, MR Poellot, LA Remer, K Sassen, JD Spinhirne, ME Splitt, and DD Turner. 2000. "ARM Southern Great Plains Site Observations of the Smoke Pall Associated with the 1998 Central American Fires." Bulletin of the American Meteorological Society 81(11):2563-2591. 


  • Barnard JC, LL Wendell, and VR Morris. 1998. "Optimal Filtering of AC Output Anemometers." Journal of Atmospheric and Oceanic Technology 15(6):1261-1271. 

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