Cooperative Institute for Research in Environmental Sciences

Rainer Volkamer

Rainer Volkamer

Research Interests

As Associate Professor at the University of Colorado (Chemistry Department) in Boulder, Colorado my teaching in Instrumental Analysis with Environmental Emphasis (undergraduate level), and Analytical Spectroscopy (graduate level) is often enhanced by my research in Atmospheric Chemistry to inform Chemistry-Climate interactions, Energy & the Environment. My research group develops instrumentation (in-situ optical spectroscopy & sub-orbital remote sensing) to solve Analytical & Physical Chemistry problems in the real-world, e.g., to better quantify sources (air-sea exchange, urban, agriculture, biomass burning, etc), characterize aerosols (optical closure), and to probe mechanisms by which gases modify aerosols, oxidative capacity, atmospheric mercury, tropospheric O3, and CH4.

Current Research

  • Tropospheric Halogens in the Remote Free Troposphere and UTLS
  • Chemical Coupling of Halogens and Oxygenated Volatile Organic Compounds
  • Solar Occultation Flux Spectroscopy aboard the Wyoming King Air
  • The CLOUD experiment: Anthropogenic and Marine Nucleation
  • Molecular Spectroscopy: weak bands of H2O and O2-O2 collision complexes

 

The Cosmics Leaving Outdoor Droplets (CLOUD) experiment at CERN, Geneva uses an ultraclean chamber facility to study how gases form new particles (nucleation), and grow to affect cloud formation.


Honors and Awards

  • 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

  • Pan, LL, EL Atlas, RJ Salawitch, SB Honomichl, JF Bresch, WJ Randel, EC Apel, RS Hornbrook, AJ Weinheimer, DC Anderson, SJ Andrews, S Baidar, SP Beaton, TL Campos, LJ Carpenter, D Chen, B Dix, V Donets, SR Hall, TF Hanisco, CR Homeyer, LG Huey, JB Jensen, L Kaser, DE Kinnison, TK Koenig, JF Lamarque, C Liu, J Luo, ZJ Luo, DD Montzka, JM Nicely, RB Pierce, DD Riemer, T Robinson, P Romashkin, A Saiz-Lopez, S Schauffler, O Shieh, MH Stell, K Ullmann, G Vaughan, R Volkamer and G Wolfe (2017), THE CONVECTIVE TRANSPORT OF ACTIVE SPECIES IN THE TROPICS (CONTRAST) EXPERIMENT. Bull. Amer. Meteorol. Soc. Version: 1 98 (1) 106-+, issn: 0003-0007, ids: EH6UW, doi: 10.1175/BAMS-D-14-00272.1
  • Peters, E, G Pinardi, A Seyler, A Richter, F Wittrock, T Bosch, M Van Roozendael, F Hendrick, T Drosoglou, AF Bais, Y Kanaya, XY Zhao, K Strong, J Lampel, R Volkamer, T Koenig, I Ortega, O Puentedura, M Navarro-Comas, L Gomez, MY Gonzalez, A Piters, J Remmers, Y Wang, T Wagner, SS Wang, A Saiz-Lopez, D Garcia-Nieto, CA Cuevas, N Benavent, R Querel, P Johnston, O Postylyakov, A Borovski, A Elokhov, I Bruchkouski, HR Liu, C Liu, QQ Hong, C Rivera, M Grutter, W Stremme, MF Khokhar, J Khayyam and JP Burrows (2017), Investigating differences in DOAS retrieval codes using MAD-CAT campaign data. Atmos. Meas. Tech. Version: 1 10 (3) 955-978, issn: 1867-1381, ids: EP6GM, doi: 10.5194/amt-10-955-2017
  • Sareen, N, EM Waxman, BJ Turpin, R Volkamer and AG Carlton (2017), Potential of Aerosol Liquid Water to Facilitate Organic Aerosol Formation: Assessing Knowledge Gaps about Precursors and Partitioning. Environ. Sci. Technol. Version: 1 51 (6) 3327-3335, issn: 0013-936X, ids: EP6HA, doi: 10.1021/acs.est.6b04540, PubMed ID: 28169540
  • Kille, N, S Baidar, P Handley, I Ortega, R Sinreich, OR Cooper, F Hase, JW Hannigan, G Pfister and R Volkamer (2017), The CU mobile Solar Occultation Flux instrument: structure functions and emission rates of NH3, NO2 and C2H6. Atmos. Meas. Tech. Version: 1 10 (1) 373-392, issn: 1867-1381, ids: EM1PB, doi: 10.5194/amt-10-373-2017
  • Chiu, R, L Tinel, L Gonzalez, R Ciuraru, F Bernard, C George and R Volkamer (2017), UV photochemistry of carboxylic acids at the air-sea boundary: A relevant source of glyoxal and other oxygenated VOC in the marine atmosphere. Geophys. Res. Lett. Version: 1 44 (2) 1079-1087, issn: 0094-8276, ids: EM9SY, doi: 10.1002/2016GL071240
  • Shrivastava, M, CD Cappa, JW Fan, AH Goldstein, AB Guenther, JL Jimenez, C Kuang, A Laskin, ST Martin, NL Ng, T Petaja, JR Pierce, PJ Rasch, P Roldin, JH Seinfeld, J Shilling, JN Smith, JA Thornton, R Volkamer, J Wang, DR Worsnop, RA Zaveri, A Zelenyuk and Q Zhang (2017), Recent advances in understanding secondary organic aerosol: Implications for global climate forcing. Rev. Geophys. Version: 1 55 (2) 509-559, issn: 8755-1209, ids: FA2XF, doi: 10.1002/2016RG000540
  • Coburn, S, B Dix, E Edgerton, CD Holmes, D Kinnison, Q Liang, A ter Schure, SY Wang and R Volkamer (2016), Mercury oxidation from bromine chemistry in the free troposphere over the southeastern US. Atmos. Chem. Phys. Version: 1 16 (6) 3743-3760, issn: 1680-7316, ids: DK1VG
  • Griffith, SM, RF Hansen, S Dusanter, V Michoud, JB Gilman, WC Kuster, PR Veres, M Graus, JA de Gouw, J Roberts, C Young, R Washenfelder, SS Brown, R Thalman, E Waxman, R Volkamer, C Tsai, J Stutz, JH Flynn, N Grossberg, B Lefer, SL Alvarez, B Rappenglueck, LH Mielke, HD Osthoff and PS Stevens (2016), Measurements of hydroxyl and hydroperoxy radicals during CalNex-LA: Model comparisons and radical budgets. J. Geophys. Res.-Atmos. Version: 1 121 (8) 4211-4232, issn: 2169-897X, ids: DP2KU, doi: 10.1002/2015JD024358
  • Hoyle, CR, C Fuchs, E Jarvinen, H Saathoff, A Dias, I El Haddad, M Gysel, SC Coburn, J Trostl, AK Bernhammer, F Bianchi, M Breitenlechner, JC Corbin, J Craven, NM Donahue, J Duplissy, S Ehrhart, C Frege, H Gordon, N Hoppel, M Heinritzi, TB Kristensen, U Molteni, L Nichman, T Pinterich, ASH Prevot, M Simon, JG Slowik, G Steiner, A Tome, AL Vogel, R Volkamer, AC Wagner, R Wagner, AS Wexler, C Williamson, PM Winkler, C Yan, A Amorim, J Dommen, J Curtius, MW Gallagher, RC Flagan, A Hansel, J Kirkby, M Kulmala, O Mohler, F Stratmann, DR Worsnop and U Baltensperger (2016), Aqueous phase oxidation of sulphur dioxide by ozone in cloud droplets. Atmos. Chem. Phys. Version: 1 16 (3) 1693-1712, issn: 1680-7316, ids: DF3YI, doi: 10.5194/acp-16-1693-2016
  • Sherwen, T, MJ Evans, LJ Carpenter, SJ Andrews, RT Lidster, B Dix, TK Koenig, R Sinreich, I Ortega, R Volkamer, A Saiz-Lopez, C Prados-Roman, AS Mahajan and C Ordonez (2016), Iodine's impact on tropospheric oxidants: a global model study in GEOS-Chem. Atmos. Chem. Phys. Version: 1 16 (2) 1161-1186, issn: 1680-7316, ids: DF3YH, doi: 10.5194/acp-16-1161-2016
  • Ortega, I, LK Berg, RA Ferrare, JW Hair, CA Hostetler and R Volkamer (2016), Elevated aerosol layers modify the O-2-O-2 absorption measured by ground-based MAX-DOAS. J. Quant. Spectrosc. Radiat. Transf. Version: 1 176 34-49, issn: 0022-4073, ids: DJ6WN, doi: 10.1016/j.jqsrt.2016.02.021
  • Berg, LK, JD Fast, JC Barnard, SP Burton, B Cairns, D Chand, JM Comstock, S Dunagan, RA Ferrare, CJ Flynn, JW Hair, CA Hostetler, J Hubbe, A Jefferson, R Johnson, EI Kassianov, CD Kluzek, P Kollias, K Lamer, K Lantz, F Mei, MA Miller, J Michalsky, I Ortega, M Pekour, RR Rogers, PB Russell, J Redemann, AJ Sedlacek, M Segal-Rosenheimer, B Schmid, JE Shilling, Y Shinozuka, SR Springston, JM Tomlinson, M Tyrrell, JM Wilson, R Volkamer, A Zelenyuk and CM Berkowitz (2016), The Two-Column Aerosol Project: Phase IOverview and impact of elevated aerosol layers on aerosol optical depth. J. Geophys. Res.-Atmos. Version: 1 121 (1) 336-361, issn: 2169-897X, ids: DD3TH, doi: 10.1002/2015JD023848
  • 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
  • Miyazaki, Y, S Coburn, K Ono, DT Ho, RB Pierce, K Kawamura and R Volkamer (2016), Contribution of dissolved organic matter to submicron water-soluble organic aerosols in the marine boundary layer over the eastern equatorial Pacific. Atmos. Chem. Phys. Version: 1 16 (12) 7695-7707, issn: 1680-7316, ids: DQ7VZ, doi: 10.5194/acp-16-7695-2016
  • Ortega, I, S Coburn, LK Berg, K Lantz, J Michalsky, RA Ferrare, J Hair, CA Hostetler and R Volkamer (2016), The CU 2-D-MAX-DOAS instrument - Part 2: Raman scattering probability measurements and retrieval of aerosol optical properties. Atmos. Meas. Tech. Version: 1 9 (8) 3893-3910, issn: 1867-1381, ids: DW6YI, doi: 10.5194/amt-9-3893-2016
  • Chen, QC, Y Miyazaki, K Kawamura, K Matsumoto, S Coburn, R Volkamer, Y Iwamoto, S Kagami, YG Deng, S Ogawa, S Ramasamy, S Kato, A Ida, Y Kajii and M Mochida (2016), Characterization of Chromophoric Water-Soluble Organic Matter in Urban, Forest, and Marine Aerosols by HR-ToF-AMS Analysis and Excitation Emission Matrix Spectroscopy. Environ. Sci. Technol. Version: 1 50 (19) 10351-10360, issn: 0013-936X, ids: DY1GC, doi: 10.1021/acs.est.6b01643
  • Baidar, S, N Kille, I Ortega, R Sinreich, D Thomson, J Hannigan and R Volkamer (2016), Development of a digital mobile solar tracker. Atmos. Meas. Tech. Version: 1 9 (3) 963-972, issn: 1867-1381, ids: DL4NF, doi: 10.5194/amt-9-963-2016
  • Tan, XX, Y Huang, MH Diao, A Bansemer, MA Zondlo, JP DiGangi, R Volkamer and YY Hu (2016), An assessment of the radiative effects of ice supersaturation based on in situ observations. Geophys. Res. Lett. Version: 1 43 (20) 11039-11047, issn: 0094-8276, ids: EC7CQ, doi: 10.1002/2016GL071144
  • Hopfner, M, R Volkamer, U Grabowski, M Grutter, J Orphal, G Stiller, T von Clarmann and G Wetzel (2016), First detection of ammonia (NH3) in the Asian summer monsoon upper troposphere. Atmos. Chem. Phys. Version: 1 16 (22) 14357-14369, issn: 1680-7316, ids: EC2UQ, doi: 10.5194/acp-16-14357-2016
  • Dix, B, TK Koenig and R Volkamer (2016), Parameterization retrieval of trace gas volume mixing ratios from Airborne MAX-DOAS. Atmos. Meas. Tech. Version: 1 9 (11) 5655-5675, issn: 1867-1381, ids: ED2VV, doi: 10.5194/amt-9-5655-2016
  • Fast, JD, LK Berg, K Zhang, RC Easter, RA Ferrare, JW Hair, CA Hostetler, Y Liu, I Ortega, A Sedlacek, JE Shilling, M Shrivastava, SR Springston, JM Tomlinson, R Volkamer, J Wilson, RA Zaveri and A Zelenyuk (2016), Model representations of aerosol layers transported from North America over the Atlantic Ocean during the Two-Column Aerosol Project. J. Geophys. Res.-Atmos. Version: 1 121 (16) 9814-9848, issn: 2169-897X, ids: DZ9OQ, doi: 10.1002/2016JD025248
  • Li, JY, JQ Mao, KE Min, RA Washenfelder, SS Brown, J Kaiser, FN Keutsch, R Volkamer, GM Wolfe, TF Hanisco, IB Pollack, TB Ryerson, M Graus, JB Gilman, BM Lerner, C Warneke, JA de Gouw, AM Middlebrook, J Liao, A Welti, BH Henderson, VF McNeill, SR Hall, K Ullmann, LJ Donner, F Paulot and LW Horowitz (2016), Observational constraints on glyoxal production from isoprene oxidation and its contribution to organic aerosol over the Southeast United States. J. Geophys. Res.-Atmos. Version: 1 121 (16) 9849-9861, issn: 2169-897X, ids: DZ9OQ, doi: 10.1002/2016JD025331
  • Schmidt, JA, DJ Jacob, HM Horowitz, L Hu, T Sherwen, MJ Evans, Q Liang, RM Suleiman, DE Oram, M Le Breton, CJ Percival, S Wang, B Dix and R Volkamer (2016), Modeling the observed tropospheric BrO background: Importance of multiphase chemistry and implications for ozone, OH, and mercury. J. Geophys. Res.-Atmos. Version: 1 121 (19) 11819-11835, issn: 2169-897X, ids: EA9PK, doi: 10.1002/2015JD024229
  • Sherwen, T, JA Schmidt, MJ Evans, LJ Carpenter, K Grossmann, SD Eastham, DJ Jacob, B Dix, TK Koenig, R Sinreich, I Ortega, R Volkamer, A Saiz-Lopez, C Prados-Roman, AS Mahajan and C Ordonez (2016), Global impacts of tropospheric halogens (Cl, Br, I) on oxidants and composition in GEOS-Chem. Atmos. Chem. Phys. Version: 1 16 (18) 12239-12271, issn: 1680-7316, ids: DY8RD, doi: 10.5194/acp-16-12239-2016
  • Palacios, LG, PC Arroyo, KZ Aregahegn, SS Steimer, T Bartels-Rausch, B Noziere, C George, M Ammann and R Volkamer (2016), Heterogeneous photochemistry of imidazole-2-carboxaldehyde: HO2 radical formation and aerosol growth. Atmos. Chem. Phys. Version: 1 16 (18) 11823-11836, issn: 1680-7316, ids: DX7DS, doi: 10.5194/acp-16-11823-2016
  • 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
  • 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
  • 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
  • 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
  • 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. U. S. A. 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
  • 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
  • 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
  • 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
  • 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
  • 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
  • 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
  • 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
  • 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. U. S. A. Version: 1 110 (6) 2035-2040, issn: 0027-8424, ids: 093RQ, doi: 10.1073/pnas.1212386110, PubMed ID: 23345444
  • 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
  • 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
  • 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
  • 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
  • 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
  • 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
  • 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
  • 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
  • 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
  • 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
  • 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
  • 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
  • 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
  • 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
  • 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
  • Volkamer, R, PJ Ziemann and MJ Molina (2009), Secondary Organic Aerosol Formation from Acetylene (C2H2): seed effect on SOA yields due to organic photochemistry in the aerosol aqueous phase. Atmos. Chem. Phys. Version: 1 9 (6) 1907-1928, issn: 1680-7316, ids: 425GQ
  • 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 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
  • 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
  • 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
  • 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
  • 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
  • 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, doi: 10.5194/acp-8-6823-2008
  • 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
  • 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
  • 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
  • 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
  • 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
  • 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
  • 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
  • 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
  • Dunlea, EJ, SC Herndon, DD Nelson, RM Volkamer, BK Lamb, EJ Allwine, M Grutter, CRR Villegas, C Marquez, S Blanco, B Cardenas, CE Kolb, LT Molina and MJ Molina (2006), Technical note: Evaluation of standard ultraviolet absorption ozone monitors in a polluted urban environment. Atmos. Chem. Phys. Version: 1 6 3163-3180, issn: 1680-7316, ids: 069HR
  • 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
  • Garcia, AR, R Volkamer, LT Molina, MJ Molina, J Samuelson, J Mellqvist, B Galle, SC Herndon and CE Kolb (2006), Separation of emitted and photochemical formaldehyde in Mexico City using a statistical analysis and a new pair of gas-phase tracers. Atmos. Chem. Phys. Version: 1 6 4545-4557, issn: 1680-7316, ids: 093YG
  • 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
  • Kleffmann, J, JC Lorzer, P Wiesen, C Kern, S Trick, R Volkamer, M Rodenas and K Wirtz (2006), Intercomparison of the DOAS and LOPAP techniques for the detection of nitrous acid (HONO). Atmos. Environ. Version: 1 40 (20) 3640-3652, issn: 1352-2310, ids: 057ID, doi: 10.1016/j.atmosenv.2006.03.027
  • 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
  • Shirley, TR, WH Brune, X Ren, J Mao, R Lesher, B Cardenas, R Volkamer, LT Molina, MJ Molina, B Lamb, E Velasco, T Jobson and M Alexander (2006), Atmospheric oxidation in the Mexico City Metropolitan Area (MCMA) during April 2003. Atmos. Chem. Phys. Version: 1 6 2753-2765, issn: 1680-7316, ids: 061CP