Cooperative Institute for Research in Environmental Sciences

Rainer Volkamer

Rainer Volkamer

Rainer's general interest is the study of atmospheric chemistry in air quality and climate science, using a combination of in-situ and remote sensing measurement techniques, which he and his group are developing and deploying in polluted urban and pristine atmospheric environments from ships, research aircrafts, and autonomous ground-based networks, and in simulation chamber experiments to develop and test the mechanistic understanding represented in atmospheric models used to manage air resources and climate.


Current Research

Atmospheric waters: multiphase chemistry in clouds and aerosols

Water is a major metastable component of the lower atmosphere (see photo) and present at most atmospheric interfaces, including aerosols. We are interested in understanding the multiphase chemistry of glyoxal, an unexplained component in arctic, marine, forest, and urban aerosols, and its indicator properties to understand phase partitioning and chemical processes in aerosol water. Multiphase chemistry in aqueous aerosols is largely missing in atmospheric models for lack of data, missing information about precursors and reaction pathways, and difficulties with assessing contributions from multiphase chemistry to ambient secondary organic aerosol mass. The effective Henry's law coefficient, KH, describes the partitioning of a molecule between the condensed water phase and the gas phase in the limit of infinite dilution. KH also determines the reaction rates of multiphase chemical reactions in the bulk of aerosols ('A'in figure) and clouds. We have determined KH,salt for the first time by time-resolved measurements of gas-phase and particle-phase glyoxal concentrations in sulfate-containing aerosols. From the exponential increase in KH,Salt over that in pure water, we determine the Setschenow salting constant of glyoxal, KSCHOCHO. This is the first determination of KS in a dynamically coupled gas-aerosol system ('B' in figure). We find that aqueous ammonium sulfate (AS) and internally mixed ammonium sulfate/fulvic acid (AS/FA) aerosols both show an exponential increase of KH,Salt with AS concentration (Kampf et al. 2013). Activity coefficients of approximately 1/500 are caused by electrical forces in aerosol water due to a "salting-in" mechanism (Kampf et al. 2013) and help explain field measurements in Mexico City (Waxman et al. 2013). Salting constants provide a framework that is novel in atmospheric models, yet may prove critical with predicting multiphase chemistry of other polar molecules in the atmosphere. References Kampf, CJ, EM Waxman, JG Slowik, J Dommen, A Prevot, U Baltensperger, T Hoffmann, and R Volkamer. 2013. Effective Henry's law partitioning and the salting constant of glyoxal in aerosols containing sulfate. Environ. Sci. Technol. 47(9):4236– 4244. Waxman, EM, K Dzepina, B Ervens, R Volkamer, et al. 2013. Secondary organic aerosol formation from semi- and intermediatevolatility organic compounds and glyoxal: relevance of O/C as a tracer for aqueous multiphase chemistry. 2013. Geophys. Res. Lett. 40:978-982.

 


The Henry's law partitioning coefficient is an exponential function of salt concentration. As the ammonium sulfate (AS) concentration exceeds the AS solubility (12 mol kg-1), a phase transition is observed (adopted from Kampf et al. 2013).


Clouds and aerosol water are chemical reactors for multiphase chemistry.


  • NSF CAREER Award recipient, 2009
  • Feodor-Lynen Fellow (2005-2007)
  • Henry & Camille Dreyfus Fellow (2002-2004)
  • Marie Curie Fellow (1998-2000)
  • Erasmus Fellow (1992-1993)

View Publications

  • Kim, SW, BC McDonald, S Baidar, SS Brown, B Dube, RA Ferrare, GJ Frost, RA Harley, JS Holloway, HJ Lee, SA McKeen, JA Neuman, JB Nowak, H Oetjen, I Ortega, IB Pollack, JM Roberts, TB Ryerson, AJ Scarino, CJ Senff, R Thalman, M Trainer, R Volkamer, N Wagner, RA Washenfelder, E Waxman and CJ Young (2016), Modeling the weekly cycle of NOx and CO emissions and their impacts on O-3 in the Los Angeles-South Coast Air Basin during the CalNex 2010 field campaign. J. Geophys. Res.-Atmos. Version: 1 121 (3) 1340-1360, issn: 2169-897X, ids: DF6QW, doi: 10.1002/2015JD024292
  • Goss, NR, EM Waxman, SC Coburn, TK Koenig, R Thalman, J Dommen, JW Hannigan, GS Tyndall and R Volkamer (2015), Measurements of the Absorption Cross Section of (CHOCHO)-C-13-C-13 at Visible Wavelengths and Application to DOAS Retrievals. J. Phys. Chem. A Version: 1 119 (19) 4651-4657, issn: 1089-5639, ids: CI6YV, doi: 10.1021/jp511357s, PubMed ID: 25551419
  • Thalman, R, MT Baeza-Romero, SM Ball, E Borras, MJS Daniels, ICA Goodall, SB Henry, T Karl, FN Keutsch, S Kim, J Mak, PS Monks, A Munoz, J Orlando, S Peppe, AR Rickard, M Rodenas, P Sanchez, R Seco, L Su, G Tyndall, M Vazquez, T Vera, E Waxman and R Volkamer (2015), Instrument intercomparison of glyoxal, methyl glyoxal and NO2 under simulated atmospheric conditions. Atmos. Meas. Tech. Version: 1 8 (4) 1835-1862, issn: 1867-1381, ids: CH2ET, doi: 10.5194/amt-8-1835-2015
  • Volkamer, R, S Baidar, TL Campos, S Coburn, JP DiGangi, B Dix, EW Eloranta, TK Koenig, B Morley, I Ortega, BR Pierce, M Reeves, R Sinreich, S Wang, MA Zondlo and PA Romashkin (2015), Aircraft measurements of BrO, IO, glyoxal, NO2, H2O, O-2-O-2 and aerosol extinction profiles in the tropics: comparison with aircraft-/ship-based in situ and lidar measurements. Atmos. Meas. Tech. Version: 1 8 (5) 2121-2148, issn: 1867-1381, ids: CJ2BJ, doi: 10.5194/amt-8-2121-2015
  • Spinei, E, A Cede, J Herman, GH Mount, E Eloranta, B Morley, S Baidar, B Dix, I Ortega, T Koenig and R Volkamer (2015), Ground-based direct-sun DOAS and airborne MAX-DOAS measurements of the collision-induced oxygen complex, O2O2, absorption with significant pressure and temperature differences. Atmos. Meas. Tech. Version: 1 8 (2) 793-809, issn: 1867-1381, ids: CC7OR, doi: 10.5194/amt-8-793-2015
  • Wang, SY, JA Schmidt, S Baidar, S Coburn, B Dix, TK Koenig, E Apel, D Bowdalo, TL Campos, E Eloranta, MJ Evans, JP DiGangi, MA Zondlo, RS Gao, JA Haggerty, SR Hall, RS Hornbrook, D Jacob, B Morley, B Pierce, M Reeves, P Romashkin, A ter Schure and R Volkamer (2015), Active and widespread halogen chemistry in the tropical and subtropical free troposphere. Proc. Natl. Acad. Sci. USA Version: 1 112 (30) 9281-9286, issn: 0027-8424, ids: CN7ZW, doi: 10.1073/pnas.1505142112, PubMed ID: 26124148
  • Baidar, S, RM Hardesty, SW Kim, AO Langford, H Oetjen, CJ Senff, M Trainer and R Volkamer (2015), Weakening of the weekend ozone effect over California's South Coast Air Basin. Geophys. Res. Lett. Version: 1 42 (21) 9457-9464, issn: 0094-8276, ids: DB2KK, doi: 10.1002/2015GL066419
  • Ortega, I, T Koenig, R Sinreich, D Thomson and R Volkamer (2015), The CU 2-D-MAX-DOAS instrument - Part 1: Retrieval of 3-D distributions of NO2 and azimuth-dependent OVOC ratios. Atmos. Meas. Tech. Version: 1 8 (6) 2371-2395, issn: 1867-1381, ids: CL6ZE, doi: 10.5194/amt-8-2371-2015
  • Saiz-Lopez, A, S Baidar, CA Cuevas, TK Koenig, RP Fernandez, B Dix, DE Kinnison, JF Lamarque, X Rodriguez-Lloveras, TL Campos and R Volkamer (2015), Injection of iodine to the stratosphere. Geophys. Res. Lett. Version: 1 42 (16) 6852-6859, issn: 0094-8276, ids: CU3FY, doi: 10.1002/2015GL064796
  • Coburn, S, I Ortega, R Thalman, B Blomquist, CW Fairall and R Volkamer (2014), Measurements of diurnal variations and eddy covariance (EC) fluxes of glyoxal in the tropical marine boundary layer: description of the Fast LED-CE-DOAS instrument. Atmos. Meas. Tech. Version: 1 7 (10) 3579-3595, issn: 1867-1381, ids: AT2AE, doi: 10.5194/amt-7-3579-2014
  • Knote, C, A Hodzic, JL Jimenez, R Volkamer, JJ Orlando, S Baidar, J Brioude, J Fast, DR Gentner, AH Goldstein, PL Hayes, WB Knighton, H Oetjen, A Setyan, H Stark, R Thalman, G Tyndall, R Washenfelder, E Waxman and Q Zhang (2014), Simulation of semi-explicit mechanisms of SOA formation from glyoxal in aerosol in a 3-D model. Atmos. Chem. Phys. Version: 1 14 (12) 6213-6239, issn: 1680-7316, ids: AK5BH, doi: 10.5194/acp-14-6213-2014
  • Zhou, S, L Gonzalez, A Leithead, Z Finewax, R Thalman, A Vlasenko, S Vagle, LA Miller, SM Li, S Bureekul, H Furutani, M Uematsu, R Volkamer and J Abbatt (2014), Formation of gas-phase carbonyls from heterogeneous oxidation of polyunsaturated fatty acids at the air-water interface and of the sea surface microlayer. Atmos. Chem. Phys. Version: 1 14 (3) 1371-1384, issn: 1680-7316, ids: AC2ZN, doi: 10.5194/acp-14-1371-2014
  • Thalman, R, KJ Zarzana, MA Tolbert and R Volkamer (2014), Rayleigh scattering cross-section measurements of nitrogen, argon, oxygen and air. J. Quant. Spectrosc. Radiat. Transf. Version: 1 147 171-177, issn: 0022-4073, ids: AN6GY, doi: 10.1016/j.jqsrt.2014.05.030
  • Baidar, S, H Oetjen, S Coburn, B Dix, I Ortega, R Sinreich and R Volkamer (2013), The CU Airborne MAX-DOAS instrument: vertical profiling of aerosol extinction and trace gases. Atmos. Meas. Tech. Version: 1 6 (3) 719-739, issn: 1867-1381, ids: 118GA, doi: 10.5194/amt-6-719-2013
  • Waxman, EM, K Dzepina, B Ervens, J Lee-Taylor, B Aumont, JL Jimenez, S Madronich and R Volkamer (2013), Secondary organic aerosol formation from semi- and intermediate-volatility organic compounds and glyoxal: Relevance of O/C as a tracer for aqueous multiphase chemistry. Geophys. Res. Lett. Version: 1 40 (5) 978-982, issn: 0094-8276, ids: 134VG, doi: 10.1002/grl.50203
  • Dix, B, S Baidara, JF Bresch, SR Hall, KS Schmidt, SY Wang and R Volkamer (2013), Detection of iodine monoxide in the tropical free troposphere. Proc. Natl. Acad. Sci. USA Version: 1 110 (6) 2035-2040, issn: 0027-8424, ids: 093RQ, doi: 10.1073/pnas.1212386110, PubMed ID: 23345444
  • Sinreich, R, A Merten, L Molina and R Volkamer (2013), Parameterizing radiative transfer to convert MAX-DOAS dSCDs into near-surface box-averaged mixing ratios. Atmos. Meas. Tech. Version: 1 6 (6) 1521-1532, issn: 1867-1381, ids: 193FX, doi: 10.5194/amt-6-1521-2013
  • Kampf, CJ, EM Waxman, JG Slowik, J Dommen, L Pfaffenberger, AP Praplan, ASH Prevot, U Baltensperger, T Hoffmann and R Volkamer (2013), Effective Henry's Law Partitioning and the Salting Constant of Glyoxal in Aerosols Containing Sulfate. Environ. Sci. Technol. Version: 1 47 (9) 4236-4244, issn: 0013-936X, ids: 141WA, doi: 10.1021/es400083d, PubMed ID: 23534917
  • Thalman, R and R Volkamer (2013), Temperature dependent absorption cross-sections of O-2-O-2 collision pairs between 340 and 630 nm and at atmospherically relevant pressure. Phys. Chem. Chem. Phys. Version: 1 15 (37) 15371-15381, issn: 1463-9076, ids: 209BF, doi: 10.1039/c3cp50968k, PubMed ID: 23928555
  • Oetjen, H, S Baidar, NA Krotkov, LN Lamsal, M Lechner and R Volkamer (2013), Airborne MAX-DOAS measurements over California: Testing the NASA OMI tropospheric NO2 product. J. Geophys. Res-Atmos. Version: 1 118 (13) 7400-7413, issn: 2169-897X, ids: 188KP, doi: 10.1002/jgrd.50550
  • Hayes, PL, AM Ortega, MJ Cubison, KD Froyd, Y Zhao, SS Cliff, WW Hu, DW Toohey, JH Flynn, BL Lefer, N Grossberg, S Alvarez, B Rappenglueck, JW Taylor, JD Allan, JS Holloway, JB Gilman, WC Kuster, JA De Gouw, P Massoli, X Zhang, J Liu, RJ Weber, AL Corrigan, LM Russell, G Isaacman, DR Worton, NM Kreisberg, AH Goldstein, R Thalman, EM Waxman, R Volkamer, YH Lin, JD Surratt, TE Kleindienst, JH Offenberg, S Dusanter, S Griffith, PS Stevens, J Brioude, WM Angevine and JL Jimenez (2013), Organic aerosol composition and sources in Pasadena, California, during the 2010 CalNex campaign. J. Geophys. Res-Atmos. Version: 1 118 (16) 9233-9257, issn: 2169-897X, ids: 225AE, doi: 10.1002/jgrd.50530
  • Ryerson, TB, AE Andrews, WM Angevine, TS Bates, CA Brock, B Cairns, RC Cohen, OR Cooper, JA de Gouw, FC Fehsenfeld, RA Ferrare, ML Fischer, RC Flagan, AH Goldstein, JW Hair, RM Hardesty, CA Hostetler, JL Jimenez, AO Langford, E McCauley, SA McKeen, LT Molina, A Nenes, SJ Oltmans, DD Parrish, JR Pederson, RB Pierce, K Prather, PK Quinn, JH Seinfeld, CJ Senff, A Sorooshian, J Stutz, JD Surratt, M Trainer, R Volkamer, EJ Williams and SC Wofsy (2013), The 2010 California Research at the Nexus of Air Quality and Climate Change (CalNex) field study. J. Geophys. Res-Atmos. Version: 1 118 (11) 5830-5866, issn: 2169-897X, ids: 228TG, doi: 10.1002/jgrd.50331
  • Coburn, S, B Dix, R Sinreich and R Volkamer (2011), The CU ground MAX-DOAS instrument: characterization of RMS noise limitations and first measurements near Pensacola, FL of BrO, IO, and CHOCHO. Atmos. Meas. Tech. Version: 1 4 (11) 2421-2439, issn: 1867-1381, ids: 863AS, doi: 10.5194/amt-4-2421-2011
  • Fried, A, C Cantrell, J Olson, JH Crawford, P Weibring, J Walega, D Richter, W Junkermann, R Volkamer, R Sinreich, BG Heikes, D O'Sullivan, DR Blake, N Blake, S Meinardi, E Apel, A Weinheimer, D Knapp, A Perring, RC Cohen, H Fuelberg, RE Shetter, SR Hall, K Ullmann, WH Brune, J Mao, X Ren, LG Huey, HB Singh, JW Hair, D Riemer, G Diskin and G Sachse (2011), Detailed comparisons of airborne formaldehyde measurements with box models during the 2006 INTEX-B and MILAGRO campaigns: potential evidence for significant impacts of unmeasured and multi-generation volatile organic carbon compounds. Atmos. Chem. Phys. Version: 1 11 (22) 11867-11894, issn: 1680-7316, ids: 863AC, doi: 10.5194/acp-11-11867-2011
  • Dzepina, K, CD Cappa, RM Volkamer, S Madronich, PF DeCarlo, RA Zaveri and JL Jimenez (2011), Modeling the Multiday Evolution and Aging of Secondary Organic Aerosol During MILAGRO 2006. Environ. Sci. Technol. Version: 1 45 (8) 3496-3503, issn: 0013-936X, ids: 747SZ, doi: 10.1021/es103186f, PubMed ID: 21425791
  • Ervens, B and R Volkamer (2010), Glyoxal processing by aerosol multiphase chemistry: towards a kinetic modeling framework of secondary organic aerosol formation in aqueous particles. Atmos. Chem. Phys. Version: 1 10 (17) 8219-8244, issn: 1680-7316, ids: 650JS, doi: 10.5194/acp-10-8219-2010
  • Li, G, W Lei, M Zavala, R Volkamer, S Dusanter, P Stevens and LT Molina (2010), Impacts of HONO sources on the photochemistry in Mexico City during the MCMA-2006/MILAGO Campaign. Atmos. Chem. Phys. Version: 1 10 (14) 6551-6567, issn: 1680-7316, ids: 633PL, doi: 10.5194/acp-10-6551-2010
  • Molina, LT, S Madronich, JS Gaffney, E Apel, B de Foy, J Fast, R Ferrare, S Herndon, JL Jimenez, B Lamb, AR Osornio-Vargas, P Russell, JJ Schauer, PS Stevens, R Volkamer and M Zavala (2010), An overview of the MILAGRO 2006 Campaign: Mexico City emissions and their transport and transformation. Atmos. Chem. Phys. Version: 1 10 (18) 8697-8760, issn: 1680-7316, ids: 657RC, doi: 10.5194/acp-10-8697-2010
  • Jobson, BT, RA Volkamer, E Velasco, G Allwine, H Westberg, BK Lamb, ML Alexander, CM Berkowitz and LT Molina (2010), Comparison of aromatic hydrocarbon measurements made by PTR-MS, DOAS and GC-FID during the MCMA 2003 Field Experiment. Atmos. Chem. Phys. Version: 1 10 (4) 1989-2005, issn: 1680-7316, ids: 559TS
  • Aiken, AC, B de Foy, C Wiedinmyer, PF DeCarlo, IM Ulbrich, MN Wehrli, S Szidat, ASH Prevot, J Noda, L Wacker, R Volkamer, E Fortner, J Wang, A Laskin, V Shutthanandan, J Zheng, R Zhang, G Paredes-Miranda, WP Arnott, LT Molina, G Sosa, X Querol and JL Jimenez (2010), Mexico city aerosol analysis during MILAGRO using high resolution aerosol mass spectrometry at the urban supersite (T0) - Part 2: Analysis of the biomass burning contribution and the non-fossil carbon fraction. Atmos. Chem. Phys. Version: 1 10 (12) 5315-5341, issn: 1680-7316, ids: 618YC, doi: 10.5194/acp-10-5315-2010
  • Song, J, W Lei, N Bei, M Zavala, B de Foy, R Volkamer, B Cardenas, J Zheng, R Zhang and LT Molina (2010), Ozone response to emission changes: a modeling study during the MCMA-2006/MILAGRO Campaign. Atmos. Chem. Phys. Version: 1 10 (8) 3827-3846, issn: 1680-7316, ids: 589WR
  • Sheehy, PM, R Volkamer, LT Molina and MJ Molina (2010), Oxidative capacity of the Mexico City atmosphere - Part 2: A ROx radical cycling perspective. Atmos. Chem. Phys. Version: 1 10 (14) 6993-7008, issn: 1680-7316, ids: 633PL, doi: 10.5194/acp-10-6993-2010
  • Volkamer, R, P Sheehy, LT Molina and MJ Molina (2010), Oxidative capacity of the Mexico City atmosphere - Part 1: A radical source perspective. Atmos. Chem. Phys. Version: 1 10 (14) 6969-6991, issn: 1680-7316, ids: 633PL, doi: 10.5194/acp-10-6969-2010
  • Sinreich, R, S Coburn, B Dix and R Volkamer (2010), Ship-based detection of glyoxal over the remote tropical Pacific Ocean. Atmos. Chem. Phys. Version: 1 10 (23) 11359-11371, issn: 1680-7316, ids: 694XJ, doi: 10.5194/acp-10-11359-2010
  • Thalman, R and R Volkamer (2010), Inherent calibration of a blue LED-CE-DOAS instrument to measure iodine oxide, glyoxal, methyl glyoxal, nitrogen dioxide, water vapour and aerosol extinction in open cavity mode. Atmos. Meas. Tech. Version: 1 3 (6) 1797-1814, issn: 1867-1381, ids: 698DV, doi: 10.5194/amt-3-1797-2010
  • Fortner, EC, J Zheng, R Zhang, WB Knighton, RM Volkamer, P Sheehy, L Molina and M Andre (2009), Measurements of Volatile Organic Compounds Using Proton Transfer Reaction - Mass Spectrometry during the MILAGRO 2006 Campaign. Atmos. Chem. Phys. Version: 1 9 (2) 467-481, issn: 1680-7316, ids: 406WN
  • Lei, W, M Zavala, B de Foy, R Volkamer, MJ Molina and LT Molina (2009), Impact of primary formaldehyde on air pollution in the Mexico City Metropolitan Area. Atmos. Chem. Phys. Version: 1 9 (7) 2607-2618, issn: 1680-7316, ids: 431YL
  • Dzepina, K, RM Volkamer, S Madronich, P Tulet, IM Ulbrich, Q Zhang, CD Cappa, PJ Ziemann and JL Jimenez (2009), Evaluation of recently-proposed secondary organic aerosol models for a case study in Mexico City. Atmos. Chem. Phys. Version: 1 9 (15) 5681-5709, issn: 1680-7316, ids: 482HW
  • Dusanter, S, D Vimal, PS Stevens, R Volkamer, LT Molina, A Baker, S Meinardi, D Blake, P Sheehy, A Merten, R Zhang, J Zheng, EC Fortner, W Junkermann, M Dubey, T Rahn, B Eichinger, P Lewandowski, J Prueger and H Holder (2009), Measurements of OH and HO2 concentrations during the MCMA-2006 field campaign - Part 2: Model comparison and radical budget. Atmos. Chem. Phys. Version: 1 9 (18) 6655-6675, issn: 1680-7316, ids: 498IE
  • Noda, J, R Volkamer and MJ Molina (2009), Dealkylation of Alkylbenzenes: A Significant Pathway in the Toluene, o-, m-, p-Xylene plus OH Reaction. J. Phys. Chem. A Version: 1 113 (35) 9658-9666, issn: 1089-5639, ids: 487EH, doi: 10.1021/jp901529k
  • Aiken, AC, D Salcedo, MJ Cubison, JA Huffman, PF DeCarlo, IM Ulbrich, KS Docherty, D Sueper, JR Kimmel, DR Worsnop, A Trimborn, M Northway, EA Stone, JJ Schauer, RM Volkamer, E Fortner, B de Foy, J Wang, A Laskin, V Shutthanandan, J Zheng, R Zhang, J Gaffney, NA Marley, G Paredes-Miranda, WP Arnott, LT Molina, G Sosa and JL Jimenez (2009), Mexico City aerosol analysis during MILAGRO using high resolution aerosol mass spectrometry at the urban supersite (T0) - Part 1: Fine particle composition and organic source apportionment. Atmos. Chem. Phys. Version: 1 9 (17) 6633-6653, issn: 1680-7316, ids: 493ZK
  • Dusanter, S, D Vimal, PS Stevens, R Volkamer and LT Molina (2009), Measurements of OH and HO2 concentrations during the MCMA-2006 field campaign - Part 1: Deployment of the Indiana University laser-induced fluorescence instrument. Atmos. Chem. Phys. Version: 1 9 (5) 1665-1685, issn: 1680-7316, ids: 418FA
  • Myriokefalitakis, S, M Vrekoussis, K Tsigaridis, F Wittrock, A Richter, C Bruhl, R Volkamer, JP Burrows and M Kanakidou (2008), The influence of natural and anthropogenic secondary sources on the glyoxal global distribution. Atmos. Chem. Phys. Version: 1 8 (16) 4965-4981, issn: 1680-7316, ids: 343OR
  • Lei, W, M Zavala, B de Foy, R Volkamer and LT Molina (2008), Characterizing ozone production and response under different meteorological conditions in Mexico City. Atmos. Chem. Phys. Version: 1 8 (24) 7571-7581, issn: 1680-7316, ids: 393YG
  • Zheng, J, R Zhang, EC Fortner, RM Volkamer, L Molina, AC Aiken, JL Jimenez, K Gaeggeler, J Dommen, S Dusanter, PS Stevens and X Tie (2008), Measurements of HNO3 and N2O5 using ion drift-chemical ionization mass spectrometry during the MILAGRO/MCMA-2006 campaign. Atmos. Chem. Phys. Version: 1 8 (22) 6823-6838, issn: 1680-7316, ids: 389FP
  • Barnard, JC, R 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. Atmos. Chem. Phys. Version: 1 8 (22) 6665-6679, issn: 1680-7316, ids: 389FP
  • Sinreich, R, F Filsinger, U Friess, U Platt, O Sebastian, T Wagner, R Volkamer and C Kern (2007), MAX-DOAS detection of glyoxal during ICARTT 2004. Atmos. Chem. Phys. Version: 1 7 1293-1303, issn: 1680-7316, ids: 138XO
  • Volkamer, R, FS Martini, LT Molina, D Salcedo, JL Jimenez and MJ Molina (2007), A missing sink for gas-phase glyoxal in Mexico City: Formation of secondary organic aerosol. Geophys. Res. Lett. Version: 1 34 (19) , Art. No. L19807, issn: 0094-8276, ids: 221HI, doi: 10.1029/2007GL030752
  • Dunlea, EJ, SC Herndon, DD Nelson, RM Volkamer, F San Martini, PM Sheehy, MS Zahniser, JH Shorter, JC Wormhoudt, BK Lamb, EJ Allwine, JS Gaffney, NA Marley, M Grutter, C Marquez, S Blanco, B Cardenas, A Retama, CRR Villegas, CE Kolb, LT Molina and MJ Molina (2007), Evaluation of nitrogen dioxide chemiluminescence monitors in a polluted urban environment. Atmos. Chem. Phys. Version: 1 7 (10) 2691-2704, issn: 1680-7316, ids: 173WT
  • Velasco, E, B Lamb, H Westberg, E Allwine, G Sosa, JL Arriaga-Colina, BT Jobson, ML Alexander, P Prazeller, WB Knighton, TM Rogers, M Grutter, SC Herndon, CE Kolb, M Zavala, B de Foy, R Volkamer, LT Molina and MJ Molina (2007), Distribution, magnitudes, reactivities, ratios and diurnal patterns of volatile organic compounds in the Valley of Mexico during the MCMA 2002 & 2003 field campaigns. Atmos. Chem. Phys. Version: 1 7 329-353, issn: 1680-7316, ids: 129RQ
  • Lei, W, B de Foy, M Zavala, R Volkamer and LT Molina (2007), Characterizing ozone production in the Mexico City Metropolitan Area: a case study using a chemical transport model. Atmos. Chem. Phys. Version: 1 7 1347-1366, issn: 1680-7316, ids: 143HX
  • de Foy, B, W Lei, M Zavala, R Volkamer, J Samuelsson, J Mellqvist, B Galle, AP Martinez, M Grutter, A Retama and LT Molina (2007), Modelling constraints on the emission inventory and on vertical dispersion for CO and SO2 in the Mexico City Metropolitan Area using Solar FTIR and zenith sky UV spectroscopy. Atmos. Chem. Phys. Version: 1 7 781-801, issn: 1680-7316, ids: 136LJ
  • San Martini, FM, EJ Dunlea, R Volkamer, TB Onasch, JT Jayne, MR Canagaratna, DR Worsnop, CE Kolb, JH Shorter, SC Herndon, MS Zahniser, D Salcedo, K Dzepina, JL Jimenez, JM Ortega, KS Johnson, GJ McRae, LT Molina and MJ Molina (2006), Implementation of a Markov Chain Monte Carlo method to inorganic aerosol modeling of observations from the MCMA-2003 campaign - Part II: Model application to the CENICA, Pedregal and Santa Ana sites. Atmos. Chem. Phys. Version: 1 6 4889-4904, issn: 1680-7316, ids: 100CA
  • Volkamer, R, JL Jimenez, F San Martini, K Dzepina, Q Zhang, D Salcedo, LT Molina, DR Worsnop and MJ Molina (2006), Secondary organic aerosol formation from anthropogenic air pollution: Rapid and higher than expected. Geophys. Res. Lett. Version: 1 33 (17) , Art. No. L17811, issn: 0094-8276, ids: 085ZE, doi: 10.1029/2006GL026899
  • Salcedo, D, TB Onasch, K Dzepina, MR Canagaratna, Q Zhang, JA Huffman, PF DeCarlo, JT Jayne, P Mortimer, DR Worsnop, CE Kolb, KS Johnson, B Zuberi, LC Marr, R Volkamer, LT Molina, MJ Molina, B Cardenas, RM Bernabe, C Marquez, JS Gaffney, NA Marley, A Laskin, V Shutthanandan, Y Xie, W Brune, R Lesher, T Shirley and JL Jimenez (2006), Characterization of ambient aerosols in Mexico City during the MCMA-2003 campaign with Aerosol Mass Spectrometry: results from the CENICA Supersite. Atmos. Chem. Phys. Version: 1 6 925-946, issn: 1680-7316, ids: 024UV
  • Wittrock, F, A Richter, H Oetjen, JP Burrows, M Kanakidou, S Myriokefalitakis, R Volkamer, S Beirle, U Platt and T Wagner (2006), Simultaneous global observations of glyoxal and formaldehyde from space. Geophys. Res. Lett. Version: 1 33 (16) , Art. No. L16804, issn: 0094-8276, ids: 078JO, doi: 10.1029/2006GL026310
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