Staff information

Rahul Zaveri

Biography

Rahul Zaveri is a chemical engineer with a wide range of research experience including assessment of transport, transformation, and fate of energy-related emissions. His expertise is in developing and applying multiphase gas-aerosol-cloud chemistry models in the analysis of field and laboratory measurements to solve complex atmospheric chemistry problems.

Dr. Zaveri is the scientific lead in the development of computationally efficient gas and aerosol modules, CBM-Z and MOSAIC, which have been implemented in PNNL’s Eulerian model PEGASUS and the next-generation fully-coupled meteorology-chemistry model WRF-Chem. He has also participated in several major field studies focused on the formation and transport of ozone and aerosol in the United States and Mexico, which have included both airborne and ground based measurements. He has developed a pre-flight and real-time aircraft flight planning program, and was the technical lead in the design and execution of two Lagrangian aircraft studies of transport and evolution of aerosols and oxidants from large urban areas.

Research Interests

Gas-phase mechanisms leading to secondary organic and inorganic aerosol formation
Heterogeneous chemical processes
Cloud-aerosol interactions
Eulerian and Lagrangian modeling of the transport, chemical transformation, and removal of atmospheric trace species
Application of such models in the analysis and interpretation of field observations

Education and Credentials

Post-doctoral, Atmospheric Sciences, Pacific Northwest National Laboratory
Ph.D., Chemical Engineering, Virginia Tech
M.S., Chemical Engineering, University of Kentucky
B.S., Chemical Engineering, University of Bombay

Affiliations and Professional Service

American Geophysical Union
American Association for Aerosol Research
Sigma Xi

Awards and Recognitions

Outstanding Performance Award, Fundamental Science Directorate, Pacific Northwest National Laboratory, 10/05
Associated Western Universities Postgraduate Fellowship, Pacific Northwest National Laboratory, 7/97 to 7/98
Selected to attend the 1993 National Oceanic and Atmospheric Administration colloquium on Operational Environmental Prediction, 6/93 to 7/93
Graduate Research Assistantship, Department of Chemical Engineering, Virginia Tech, 8/93 to 6/97
Graduate Research Assistantship, Department of Chemical Engineering, University of Kentucky, 10/91 to 8/93

PNNL Publications

2009

de Gouw JA, D Welsh-Bon, C Warneke, WC Kuster, ML Alexander, AK Baker, AJ Beyersdorf, DR Blake, MR Canagaratna, AT Celada, LG Huey, W Junkermann, TB Onasch, A Salcido, SJ Sjostedt, A Sullivan, DJ Tanner, L Vargas-Ortiz, RJ Weber, DR Worsnop, XY Yu, and RA Zaveri. 2009. "Emission and Chemistry of Organic Carbon in the Gas and Aerosol Phase at a Sub-Urban Site Near Mexico City in March 2006 During the MILAGRO Study." Atmospheric Chemistry and Physics 9(10):3425-3442.
Fast JD, A Aiken, JD Allan, ML Alexander, T Campos, MR Canagaratna, EG Chapman, P DeCarlo, B de Foy, J Gaffney, JA de Gouw, JC Doran, L Emmons, A Hodzic, SC Herndon, LG Huey, JT Jayne, JL Jimenez, LI Kleinman, WC Kuster, NA Marley, LM Russell, C Ochoa, TB Onasch, MS Pekour, C Song, IM Ulbrich, C Warneke, D Welsh-Bon, C Wiedinmyer, DR Worsnop, XY Yu, and RA Zaveri. 2009. "Evaluating Simulated Primary Anthropogenic and Biomass Burning Organic Aerosols during MILAGRO: Implications for Assessing Treatments of Secondary Organic Aerosols." Atmospheric Chemistry and Physics 9(16):6191-6215.
Kleinman LI, SR Springston, JX Wang, PH Daum, YN Lee, LJ Nunnermacker, G Senum, J Weinstein-Lloyd, ML Alexander, JM Hubbe, JV Ortega, RA Zaveri, MR Canagaratna, and JT Jayne. 2009. "The Time Evolution of Aerosol Size Distribution Over the Mexico City Plateau." Atmospheric Chemistry and Physics 9(13):4261-4278.
Matsui H, M Koike, Y Kondo, N Takegawa, K Kita, Y Miyazaki, M Hu, SY Chang, DR Blake, JD Fast, RA Zaveri, DG Streets, Q Zhang, and T Zhou. 2009. "Spatial and Temporal Variations of Aerosols Around Beijing in the Summer 2006: Model Evaluation and Source Apportionment." Journal of Geophysical Research. D. (Atmospheres) 114:Article number: D00G13. doi:10.1029/2008JD010906
Riemer N, M West, RA Zaveri, and RC Easter. 2009. "Simulating the Evolution of Soot Mixing State with a Particle-Resolved Aerosol Model." Journal of Geophysical Research. D. (Atmospheres) 114:D09202. doi:10.1029/2008JD011073

2008

Zelenyuk A, J Yang, C Song, RA Zaveri, and DG Imre. 2008. ""Depth-Profiling" and Quantitative Characterization of the Size, Composition, Shape, Density, and Morphology of Fine Particles with SPLAT, a Single-Particle Mass Spectrometer." Journal of Physical Chemistry A 112(4):669-677. doi:10.1021/jp077308y
Zelenyuk A, J Yang, C Song, RA Zaveri, and DG Imre. 2008. "A New Real-Time Method for Determining Particles Sphericity and Density: Application to Secondary Organic Aerosol Formed by Ozonolysis of alpha-Pinene." Environmental Science & Technology 42(21):8033-8038. doi:10.1021/es8013562
Hopkins RJ, Y Desyaterik, AV Tivanski, RA Zaveri, CM Berkowitz, T Tyliszczak, MK Gilles, and A Laskin. 2008. "Chemical Speciation of Sulfur in Marine Cloud Droplets and Particles: Analysis of Individual Particles from the Marine Boundary Layer Over the California Current." Journal of Geophysical Research. D. (Atmospheres) 113(D4):D04209. doi:10.1029/2007/JD008954
Zaveri RA, RC Easter, JD Fast, and LK Peters. 2008. "Model for Simulating Aerosol Interactions and Chemistry (MOSAIC)." Journal of Geophysical Research. D. (Atmospheres) 113(D13):Art. No. D13204. doi:10.1029/2007JD008782

2007

Ghan SJ, and RA Zaveri. 2007. "Parameterization of Optical Properties for Hydrated Internally Mixed Aerosol." Journal of Geophysical Research. D. (Atmospheres) 112(D10):D10201. doi:10.1029/2006JD007927
Kleinman LI, PH Daum, YN Lee, G Senum, SR Springston, J Wang, CM Berkowitz, JM Hubbe, RA Zaveri, FJ Brechtel, JT Jayne, TB Onasch, and D Worsnop. 2007. "Aircraft Observations of Aerosol Composition and Ageing in New England and Mid-Atlantic States during the Summer 2002 New England Air Quality Study Field Campaign." Journal of Geophysical Research. D. (Atmospheres) 112(D9):D09310. doi:10.1029/2006JD007786
Song C, RA Zaveri, ML Alexander, JA Thornton, S Madronich, JV Ortega, A Zelenyuk, XY Yu, A Laskin, and AD Maughan. 2007. "Effect of Hydrophobic Primary Organic Aerosols on Secondary Organic Aerosol Formation from Ozonolysis of a-Pinene." Geophysical Research Letters 34(20):Paper # L20803. doi:10.1029/2007GL030720

2006

Fast JD, WI Gustafson, Jr, RC Easter, 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

2005

Zaveri RA, RC Easter, and AS Wexler. 2005. "A New Method for Multicomponent Activity Coefficients of Electrolytes in Aqueous Atmospheric Aerosols." Journal of Geophysical Research. D. (Atmospheres) 110(D2):D02201. doi:10.1029/2004JD004681
Zaveri RA, RC Easter, and LK Peters. 2005. "A Computationally Efficient Multicomponent Equilibrium Solver for Aerosols (MESA)." Journal of Geophysical Research. D. (Atmospheres) 110(D24):D24203. doi:10.1029/2004JD005618
Voss PB, D Holcomb, CM Berkowitz, and RA Zaveri. 2005. "Integrated System Optimization of Controlled Meteorological (CMET) Balloons." In Proceedings of AIAA's 5th Annual Aviation Technology, Integration, and Operations (ATIO) Conference, AIAA 16th Ligher-than-air Systems Technology Conference, and Balloons Systems Conference, September 26-28, 2005, Arlington, Virginia, pp. 780-783. American Institute of Aeronautics and Astronautics, Reston, VA.
Zhang Y, XM Hu, G Howell, ED Sills, JD Fast, WI Gustafson, Jr, RA Zaveri, GA Grell, SE Peckham, and SA McKeen. 2005. "Modeling Atmospheric Aerosols in WRF/Chem." In 2005 Joint WRF/MM5 User's Workshop, June 27-30, 2005, Boulder, Colorado. National Center for Atmospheric Research, Boulder, CO.

2004

Zaveri RA, CM Berkowitz, JM Hubbe, SR Springston, FJ Brechtel, TB Onasch, and JT Jayne. 2004. "Nighttime Lagrangian Measurements of Aerosols and Oxidants in the Boston Urban Plume: Possible Evidence of Heterogeneous Loss of Ozone." In American Association for Aerosol Research 23rd Annual Conference, October 4-8, 2004, Atlanta, Georgia. American Association for Aerosol Research, Mt. Laurel, NJ.
Zaveri RA, RC Easter, and AS Wexler. 2004. "A Computationally Efficient Model for Multicomponent Activity Coefficients in Aqueous Solutions." In American Association for Aerosol Research 23rd Annual Conference, October 4-8, 2004, Atlanta, Georgia. American Association for Aerosol Research, Mt. Laurel, NJ.
Zaveri RA, RC Easter, LK Peters, and AS Wexler. 2004. "A Computationally Efficient Algorithm for Aerosol Phase Equilibrium." In American Association for Aerosol Research 23rd Annual Conference, October 4-8, 2004, Atlanta, Georgia. American Association for Aerosol Research, Mt. Laurel, NJ.
Easter RC, SJ Ghan, Y Zhang, RD Saylor, EG Chapman, NS Laulainen, H Abdul-Razzak, LR Leung, X Bian, and RA Zaveri. 2004. "MIRAGE: Model Description and Evaluation of Aerosols and Trace Gases." Journal of Geophysical Research. D. (Atmospheres) 109(D20):D20210. doi:10.1029/2004JD004571
Ghan SJ, X Bian, EG Chapman, RC Easter, GI Fann, SC Kothari, RA Zaveri, and Y Zhang. 2004. Simulation of Climate Forcing by Aerosols. PNNL-14634, Pacific Northwest National Laboratory, Richland, WA.

2003

Zaveri RA, CM Berkowitz, LI Kleinman, SR Springston, PV Doskey, WA Lonneman, and CW Spicer, Jr. 2003. "Ozone Production Efficiency and NOx Depletion in an Urban Plume: Interpretation of Field Observations and Implications for Evaluating O3-NOx-VOC Sensitivity." Journal of Geophysical Research. D. (Atmospheres) 108(D14):4436. doi:10.1029/2002JD003144

2002

Cho HM, PB Shepson, LA Barrie, JP Cowin, and RA Zaveri. 2002. "NMR Investigation of the Quasi-Brine Layer in Ice/Brine Mixtures." Journal of Physical Chemistry B 106(43):11226-11232.
Fast JD, RA Zaveri, RX Bian, EG Chapman, and RC Easter. 2002. "Effect of Regional-Scale Transport on Oxidants in the Vicinity of Philadelphia During the 1999 NE-OPS Field Campaign." Journal of Geophysical Research. D. (Atmospheres) 107(D16):, doi:10.1029/2001JD000980
Berkowitz CM, RA Zaveri, CW Spicer, P Doskey, and J Weinstein-Lloyd. 2002. "Ozone Production Efficiency at the Williams Tower." In Fourth Conference on Atmospheric Chemistry: Urban, Regional, and Global Scale Impacts of Air Pollutants, pp. 171-174. American Meteorological Society, Boston, MA.

2001

Berkowitz CM, RA Zaveri, X Bian, S Zhong, RS Disselkamp, NS Laulainen, and EG Chapman. 2001. "Aircraft Observations of Aerosols, O3 and NOy in a Nighttime Urban Plume." Atmospheric Environment 35(13):2395-2404.
Ghan SJ, RC Easter, EG Chapman, H Abdul-Razzak, Y Zhang, LR Leung, NS Laulainen, RD Saylor, and RA Zaveri. 2001. "A Physically-Based Estimate of Radiative Forcing by Anthropogenic Sulfate Aerosol." Journal of Geophysical Research. D. (Atmospheres) 106(D6):5279-5293.

2000

Disselkamp RS, MA Carpenter, JP Cowin, CM Berkowitz, EG Chapman, RA Zaveri, and NS Laulainen. 2000. "Ozone Loss on Atmospheric Soot Aerosols." Journal of Geophysical Research. D. (Atmospheres) 105(D8):9767-9771.

1999

Zaveri RA, and LK Peters. 1999. "A New Lumped Structure Photochemical Mechanism for Large-Scale Applications." Journal of Geophysical Research. D. (Atmospheres) 104(D23):30387-30415.
Lee PS, RA Zaveri, RC Easter, and LK Peters. 1999. "Technical Note: On the Parallelization of a Global Climate-Chemistry Modeling System." Atmospheric Environment 33(4):675-681.