Cooperative Institute for Research in Environmental Sciences

Stephen A. Montzka

Stephen A. Montzka

Research Interests

Measuring and understanding changes in the chemical composition of the global atmosphere, particularly related to ozone-depleting substances, greenhouse gases, and hazardous air pollutants; identifying the role of natural and human-related influences on hemispheric to global-scale atmospheric composition; diagnosing variability in the atmosphere's oxidizing capacity, in terrestrial photosynthesis, and in stratosphere-troposhere exchange; quantifying fluxes of trace gases from the United States; and effectively communicating scientific results via national and international assessment reports.

Current Research

Interpreting observations from a multi-decadal sampling program for over 30 trace gases at 45 sites distributed throughout the global atmosphere is a continuing theme.  Data obtained from measurements of these samples via high-precision gas chromatography coupled to mass spectrometry have been used recently for 1) investigating the influence on the ozone layer of increasing concentrations of short-lived gases not controlled by the Montreal Protocol (e.g., dichloromethane), 2) diagnosing the global and relative hemispheric concentration of the hydroxyl radical, over time and estimating the impact of those changes on the global budget of methane, 3) improving our understanding of the global budget of carbonyl sulfide, which may enhance our understanding of CO2 uptake by terrestrial photosynthesis, and 4) documenting broad-scale concentration changes in short-lived trace gases influencing ozone and air quality.

In addition to studying atmospheric changes on global scales, the U.S.-centric sampling program managed by the Carbon Cycle Group and NOAA has allowed investigations into national-scale issues.  Data obtained from this regional network have been used to quantify national-scale emissions of ozone-depleting substances and non-CO2 greenhouse gases so as to 1) provide estimates independent of inventory-based methods ozone-depleting gases and substitute chemicals, in particular), 2) improve the quantification and attribution of atmospheric impacts associated with oil and gas exploration and development (including hydraulic fracturing), and 3) improve our understanding of continental-scale sources and sinks of carbonyl sulfide, a trace gas whose concentration changes over land to appear closely linked to terrestrial photosynthesis.

Other Activities:

Dr. Montzka is the co-lead author of the Chapter on hydrofluorocarbons for the 2018 WMO/UNEP Scientific Assessment of Ozone Depletion.

 



Honors and Awards

  • 2016 Excellence in Refereeing Citation by GRL
  • 2015 Nominated into the Montreal Protocol’s Who’s Who
  • 2014 Colorado Governor's Award for High-Impact Research, Team Member
  • 2012 Excellence in Refereeing Citation by JGR-A
  • 2008 U.S. Department of Commerce Silver Medal
  • 2007 Excellence in Refereeing Citation by GRL
  • 2008 NOAA Administrator Award
  • 2007 U.S. EPA Stratospheric Ozone Protection Award
  • 2000 NOAA Research Employee of the Year
  • 1997 U.S. Department of Commerce Silver Medal
  • 1996-2009 Awarded NOAA Outstanding Scientific Paper of the Year Award (nine times).
  • 1994, 1995, 2003 NASA Group Achievement Awards for separate field missions.
  • 1992, 1993, 1997 U.S. Department of Commerce, NOAA Certificate of Recognition.
  • 1989, 1990 National Research Council Post-Doctorate Fellowships
  • 1983, 1984 Colorado Doctoral Fellowships
  • 1982 Phi Beta Kappa

View Publications

  • Sweeney, C, A Karion, S Wolter, T Newberger, D Guenther, JA Higgs, AE Andrews, PM Lang, D Neff, E Dlugokencky, JB Miller, SA Montzka, BR Miller, KA Masarie, SC Biraud, PC Novelli, M Crotwell, AM Crotwell, K Thoning and PP Tans (2015), Seasonal climatology of CO2 across North America from aircraft measurements in the NOAA/ESRL Global Greenhouse Gas Reference Network. J. Geophys. Res.-Atmos. Version: 1 120 (10) 5155-5190, issn: 2169-897X, ids: CL1IT, doi: 10.1002/2014JD022591
  • Hossaini, R, MP Chipperfield, SA Montzka, A Rap, S Dhomse and W Feng (2015), Efficiency of short-lived halogens at influencing climate through depletion of stratospheric ozone. Nature Geosci. Version: 1 8 (3) 186-190, issn: 1752-0894, ids: CD0NL, doi: 10.1038/NGEO2363
  • Commane, R, LK Meredith, IT Baker, JA Berry, JW Munger, SA Montzka, PH Templer, SM Juice, MS Zahniser and SC Wofsy (2015), Seasonal fluxes of carbonyl sulfide in a midlatitude forest. Proc. Natl. Acad. Sci. U. S. A. Version: 1 112 (46) 14162-14167, issn: 0027-8424, ids: CW7IA, doi: 10.1073/pnas.1504131112, PubMed ID: 26578759
  • Hossaini, R, MP Chipperfield, A Saiz-Lopez, JJ Harrison, R von Glasow, R Sommariva, E Atlas, M Navarro, SA Montzka, W Feng, S Dhomse, C Harth, J Muhle, C Lunder, S O'Doherty, D Young, S Reimann, MK Vollmer, PB Krummel and PF Bernath (2015), Growth in stratospheric chlorine from short-lived chemicals not controlled by the Montreal Protocol. Geophys. Res. Lett. Version: 1 42 (11) 4573-4580, issn: 0094-8276, ids: CM2LI, doi: 10.1002/2015GL063783
  • Graziosi, F, J Arduini, F Furlani, U Giostra, LJM Kuijpers, SA Montzka, BR Miller, SJ O'Doherty, A Stohl, P Bonasoni and M Maione (2015), European emissions of HCFC-22 based on eleven years of high frequency atmospheric measurements and a Bayesian inversion method. Atmos. Environ. Version: 1 112 196-207, issn: 1352-2310, ids: CK4JT, doi: 10.1016/j.atmosenv.2015.04.042
  • Lennartz, ST, G Krysztofiak, CA Marandino, BM Sinnhuber, S Tegtmeier, F Ziska, R Hossaini, K Kruger, SA Montzka, E Atlas, DE Oram, T Keber, H Bonisch and B Quack (2015), Modelling marine emissions and atmospheric distributions of halocarbons and dimethyl sulfide: the influence of prescribed water concentration vs. prescribed emissions. Atmos. Chem. Phys. Version: 1 15 (20) 11753-11772, issn: 1680-7316, ids: CV5NE, doi: 10.5194/acp-15-11753-2015
  • Kuai, L, JR Worden, JE Campbell, SS Kulawik, KF Li, M Lee, RJ Weidner, SA Montzka, FL Moore, JA Berry, I Baker, AS Denning, HS Bian, KW Bowman, JJ Liu and YL Yung (2015), Estimate of carbonyl sulfide tropical oceanic surface fluxes using Aura Tropospheric Emission Spectrometer observations. J. Geophys. Res.-Atmos. Version: 1 120 (20) , issn: 2169-897X, ids: CX1CG, doi: 10.1002/2015JD023493
  • Fortems-Cheiney, A, M Saunois, I Pison, F Chevallier, P Bousquet, C Cressot, SA Montzka, PJ Fraser, MK Vollmer, PG Simmonds, D Young, S O'Doherty, RF Weiss, F Artuso, B Barletta, DR Blake, S Li, C Lunder, BR Miller, S Park, R Prinn, T Saito, LP Steele and Y Yokouchi (2015), Increase in HFC-134a emissions in response to the success of the Montreal Protocol. J. Geophys. Res.-Atmos. Version: 1 120 (22) , issn: 2169-897X, ids: DA5EJ, doi: 10.1002/2015JD023741
  • Hu, L, SA Montzka, JB Miller, AE Andrews, SJ Lehman, BR Miller, K Thoning, C Sweeney, HL Chen, DS Godwin, K Masarie, L Bruhwiler, ML Fischer, SC Biraud, MS Torn, M Mountain, T Nehrkorn, J Eluszkiewicz, S Miller, RR Draxler, AF Stein, BD Hall, JW Elkins and PP Tans (2015), US emissions of HFC-134a derived for 2008-2012 from an extensive flask-air sampling network. J. Geophys. Res.-Atmos. Version: 1 120 (2) 801-825, issn: 2169-897X, ids: CC1QQ, doi: 10.1002/2014JD022617
  • Montzka, SA, M McFarland, SO Andersen, BR Miller, DW Fahey, BD Hall, L Hu, C Siso and JW Elkins (2015), Recent Trends in Global Emissions of Hydrochlorofluorocarbons and Hydrofluorocarbons: Reflecting on the 2007 Adjustments to the Montreal Protocol. J. Phys. Chem. A Version: 1 119 (19) 4439-4449, issn: 1089-5639, ids: CI6YV, doi: 10.1021/jp5097376, PubMed ID: 25405363
  • Ou-Yang, CF, CC Chang, SP Chen, C Chew, BR Lee, CY Chang, SA Montzka, GS Dutton, JH Butler, JW Elkins and JL Wang (2015), Changes in the levels and variability of halocarbons and the compliance with the Montreal Protocol from an urban view. Chemosphere Version: 1 138 438-446, issn: 0045-6535, ids: CS0SP, doi: 10.1016/j.chemosphere.2015.06.070, PubMed ID: 26160300
  • Elvidge, ECL, DE Oram, JC Laube, AK Baker, SA Montzka, S Humphrey, DA O'Sullivan and CAM Brenninkmeijer (2015), Increasing concentrations of dichloromethane, CH2Cl2, inferred from CARIBIC air samples collected 1998-2012. Atmos. Chem. Phys. Version: 1 15 (4) 1939-1958, issn: 1680-7316, ids: CB7IP, doi: 10.5194/acp-15-1939-2015
  • Cressot, C, F Chevallier, P Bousquet, C Crevoisier, EJ Dlugokencky, A Fortems-Cheiney, C Frankenberg, R Parker, I Pison, RA Scheepmaker, SA Montzka, PB Krummel, LP Steele and RL Langenfelds (2014), On the consistency between global and regional methane emissions inferred from SCIAMACHY, TANSO-FTS, IASI and surface measurements. Atmos. Chem. Phys. Version: 1 14 (2) 577-592, issn: 1680-7316, ids: AA1JZ, doi: 10.5194/acp-14-577-2014
  • Kuai, L, J Worden, SS Kulawik, SA Montzka and J Liu (2014), Characterization of Aura TES carbonyl sulfide retrievals over ocean. Atmos. Meas. Tech. Version: 1 7 (1) 163-172, issn: 1867-1381, ids: AA2SW, doi: 10.5194/amt-7-163-2014
  • Xiang, B, PK Patra, SA Montzka, SM Miller, JW Elkins, FL Moore, EL Atlas, BR Miller, RF Weiss, RG Prinn and SC Wofsy (2014), Global emissions of refrigerants HCFC-22 and HFC-134a: Unforeseen seasonal contributions. Proc. Natl. Acad. Sci. U. S. A. Version: 1 111 (49) 17379-17384, issn: 0027-8424, ids: AU9NR, doi: 10.1073/pnas.1417372111, PubMed ID: 25422438
  • Caulton, DR, PB Shepson, RL Santoro, JP Sparks, RW Howarth, AR Ingraffea, MOL Cambaliza, C Sweeney, A Karion, KJ Davis, BH Stirm, SA Montzka and BR Miller (2014), Toward a better understanding and quantification of methane emissions from shale gas development. Proc. Natl. Acad. Sci. U. S. A. Version: 1 111 (17) 6237-6242, issn: 0027-8424, ids: AG1TL, doi: 10.1073/pnas.1316546111, PubMed ID: 24733927
  • Petron, G, A Karion, C Sweeney, BR Miller, SA Montzka, GJ Frost, M Trainer, P Tans, A Andrews, J Kofler, D Helmig, D Guenther, E Dlugokencky, P Lang, T Newberger, S Wolter, B Hall, P Novelli, A Brewer, S Conley, M Hardesty, R Banta, A White, D Noone, D Wolfe and R Schnell (2014), A new look at methane and nonmethane hydrocarbon emissions from oil and natural gas operations in the Colorado Denver-Julesburg Basin. J. Geophys. Res.-Atmos. Version: 1 119 (11) 6836-6852, issn: 2169-897X, ids: AJ8RK, doi: 10.1002/2013JD021272
  • Hall, BD, A Engel, J Muhle, JW Elkins, F Artuso, E Atlas, M Aydin, D Blake, EG Brunke, S Chiavarini, PJ Fraser, J Happell, PB Krummel, I Levin, M Loewenstein, M Maione, SA Montzka, S O'Doherty, S Reimann, G Rhoderick, ES Saltzman, HE Scheel, LP Steele, MK Vollmer, RF Weiss, D Worthy and Y Yokouchi (2014), Results from the International Halocarbons in Air Comparison Experiment (IHALACE). Atmos. Meas. Tech. Version: 1 7 (2) 469-490, issn: 1867-1381, ids: AC3AF, doi: 10.5194/amt-7-469-2014
  • Patra, PK, MC Krol, SA Montzka, T Arnold, EL Atlas, BR Lintner, BB Stephens, B Xiang, JW Elkins, PJ Fraser, A Ghosh, EJ Hintsa, DF Hurst, K Ishijima, PB Krummel, BR Miller, K Miyazaki, FL Moore, J Muhle, S O'Doherty, RG Prinn, LP Steele, M Takigawa, HJ Wang, RF Weiss, SC Wofsy and D Young (2014), Observational evidence for interhemispheric hydroxyl-radical parity. Nature Version: 1 513 (7517) 219-223, issn: 0028-0836, ids: AO5DP, doi: 10.1038/nature13721, PubMed ID: 25209800
  • Umezawa, T, AK Baker, D Oram, C Sauvage, D O'Sullivan, A Rauthe-Schoch, SA Montzka, A Zahn and CAM Brenninkmeijer (2014), Methyl chloride in the upper troposphere observed by the CARIBIC passenger aircraft observatory: Large-scale distributions and Asian summer monsoon outflow. J. Geophys. Res.-Atmos. Version: 1 119 (9) 5542-5558, issn: 2169-897X, ids: AK3QS, doi: 10.1002/2013JD021396
  • Maione, M, F Graziosi, J Arduini, F Furlani, U Giostra, DR Blake, P Bonasoni, X Fang, SA Montzka, SJ O'Doherty, S Reimann, A Stohl and MK Vollmer (2014), Estimates of European emissions of methyl chloroform using a Bayesian inversion method. Atmos. Chem. Phys. Version: 1 14 (18) 9755-9770, issn: 1680-7316, ids: AP3QX, doi: 10.5194/acp-14-9755-2014
  • Berkelhammer, M, D Asaf, C Still, S Montzka, D Noone, M Gupta, R Provencal, H Chen and D Yakir (2014), Constraining surface carbon fluxes using in situ measurements of carbonyl sulfide and carbon dioxide. Global Biogeochem. Cycles Version: 1 28 (2) 161-179, issn: 0886-6236, ids: AD1SP, doi: 10.1002/2013GB004644
  • Asaf, D, E Rotenberg, F Tatarinov, U Dicken, SA Montzka and D Yakir (2013), Ecosystem photosynthesis inferred from measurements of carbonyl sulphide flux. Nature Geosci. Version: 1 6 (3) 186-190, issn: 1752-0894, ids: 117IC, doi: 10.1038/ngeo1730
  • Berry, J, A Wolf, JE Campbell, I Baker, N Blake, D Blake, AS Denning, SR Kawa, SA Montzka, U Seibt, K Stimler, D Yakir and ZX Zhu (2013), A coupled model of the global cycles of carbonyl sulfide and CO2: A possible new window on the carbon cycle. J. Geophys. Res.-Biogeosci. Version: 1 118 (2) 842-852, issn: 2169-8953, ids: 224TU, doi: 10.1002/jgrg.20068
  • Karion, A, C Sweeney, G Petron, G Frost, RM Hardesty, J Kofler, BR Miller, T Newberger, S Wolter, R Banta, A Brewer, E Dlugokencky, P Lang, SA Montzka, R Schnell, P Tans, M Trainer, R Zamora and S Conley (2013), Methane emissions estimate from airborne measurements over a western United States natural gas field. Geophys. Res. Lett. Version: 1 40 (16) 4393-4397, issn: 0094-8276, ids: 219SI, doi: 10.1002/grl.50811
  • Miller, SM, SC Wofsy, AM Michalak, EA Kort, AE Andrews, SC Biraud, EJ Dlugokencky, J Eluszkiewicz, ML Fischer, G Janssens-Maenhout, BR Miller, JB Miller, SA Montzka, T Nehrkorn and C Sweeney (2013), Anthropogenic emissions of methane in the United States. Proc. Natl. Acad. Sci. U. S. A. Version: 1 110 (50) 20018-20022, issn: 0027-8424, ids: 266YY, doi: 10.1073/pnas.1314392110, PubMed ID: 24277804
  • Lehman, SJ, JB Miller, C Wolak, J Southon, PP Tans, SA Montzka, C Sweeney, A Andrews, B LaFranchi, TP Guilderson and JC Turnbull (2013), ALLOCATION OF TERRESTRIAL CARBON SOURCES USING (CO2)-C-14: METHODS, MEASUREMENT, AND MODELING. Radiocarbon Version: 1 55 (3-Feb) 1484-1495, issn: 0033-8222, ids: 235WK
  • Hossaini, R, H Mantle, MP Chipperfield, SA Montzka, P Hamer, E Ziska, B Quack, K Kruger, S Tegtmeier, E Atlas, S Sala, A Engel, H Bonisch, T Keber, D Oram, G Mills, C Ordonez, A Saiz-Lopez, N Warwick, Q Liang, W Feng, F Moore, BR Miller, V Marecal, NAD Richards, M Dorf and K Pfeilsticker (2013), Evaluating global emission inventories of biogenic bromocarbons. Atmos. Chem. Phys. Version: 1 13 (23) 11819-11838, issn: 1680-7316, ids: 274OV, doi: 10.5194/acp-13-11819-2013
  • Rigby, M, RG Prinn, S O'Doherty, SA Montzka, A McCulloch, CM Harth, J Muhle, PK Salameh, RF Weiss, D Young, PG Simmonds, BD Hall, GS Dutton, D Nance, DJ Mondeel, JW Elkins, PB Krummel, LP Steele and PJ Fraser (2013), Re-evaluation of the lifetimes of the major CFCs and CH3CCl3 using atmospheric trends. Atmos. Chem. Phys. Version: 1 13 (5) 2691-2702, issn: 1680-7316, ids: 117NP, doi: 10.5194/acp-13-2691-2013
  • LaFranchi, BW, G Petron, JB Miller, SJ Lehman, AE Andrews, EJ Dlugokencky, B Hall, BR Miller, SA Montzka, W Neff, PC Novelli, C Sweeney, JC Turnbull, DE Wolfe, PP Tans, KR Gurney and TP Guilderson (2013), Constraints on emissions of carbon monoxide, methane, and a suite of hydrocarbons in the Colorado Front Range using observations of (CO2)-C-14. Atmos. Chem. Phys. Version: 1 13 (21) 11101-11120, issn: 1680-7316, ids: 253PP, doi: 10.5194/acp-13-11101-2013
  • Waugh, DW, AM Crotwell, EJ Dlugokencky, GS Dutton, JW Elkins, BD Hall, EJ Hintsa, DF Hurst, SA Montzka, DJ Mondeel, FL Moore, JD Nance, EA Ray, SD Steenrod, SE Strahan and C Sweeney (2013), Tropospheric SF6: Age of air from the Northern Hemisphere midlatitude surface. J. Geophys. Res.-Atmos. Version: 1 118 (19) 11429-11441, issn: 2169-897X, ids: 297PF, doi: 10.1002/jgrd.50848
  • Blunden, J, DS Arndt, C Achberger, SA Ackerman, A Albanil, P Alexander, EJ Alfaro, R Allan, LM Alves, JA Amador, P Ambenje, S Andrianjafinirina, J Antonov, JA Aravequia, A Arendt, J Arevalo, I Ashik, Z Atheru, V Banzon, MO Baringer, S Barreira, DE Barriopedro, G Beard, A Becker, MJ Behrenfeld, GD Bell, A Benedetti, G Bernhard, P Berrisford, DI Berry, U Bhatt, M Bidegain, N Bindoff, P Bissolli, ES Blake, R Booneeady, M Bosilovich, JE Box, T Boyer, GO Braathen, DH Bromwich, R Brown, L Brown, L Bruhwiler, ON Bulygina, D Burgess, J Burrows, B Calderon, SJ Camargo, J Campbell, Y Cao, J Cappelen, G Carrasco, DP Chambers, L Chang'a, P Chappell, W Chehade, M Cheliah, HH Christiansen, JR Christy, P Ciais, CAS Coelho, JG Cogley, S Colwell, JN Cross, J Crouch, SA Cunningham, M Dacic, RAM De Jeu, FS Dekaa, M Demircan, C Derksen, HJ Diamond, EJ Dlugokencky, K Dohan, AJ Dolman, CM Domingues, SF Dong, WA Dorigo, DS Drozdov, CR Duguay, RJH Dunn, AM Duran-Quesada, GS Dutton, C Ehmann, JW Elkins, C Euscategui, JS Famiglietti, F Fang, N Fauchereau, RA Feely, BM Fekete, C Fenimore, VE Fioletov, CT Fogarty, RL Fogt, CK Folland, MJ Foster, E Frajka-Williams, BA Franz, SH Frith, I Frolov, C Ganter, S Garzoli, ML Geai, S Gerland, W Gitau, KL Gleason, N Gobron, SB Goldenberg, G Goni, SA Good, J Gottschalck, MC Gregg, G Griffiths, JU Grooss, C Guard, SK Gupta, BD Hall, MS Halpert, Y Harada, C Hauri, AK Heidinger, A Heikkila, RR Heim, P Heimbach, HG Hidalgo, K Hilburn, SP Ho, WR Hobbs, Holgate, A Hovsepyan, ZZ Hu, P Hughes, DF Hurst, R Ingvaldsen, A Inness, E Jaimes, M Jakobsson, AI James, MO Jeffries, WE Johns, B Johnsen, GC Johnson, B Johnson, LT Jones, G Jumaux, K Kabidi, JW Kaiser, A Kamga, KK Kang, TO Kanzow, HY Kao, LM Keller, JJ Kennedy, J Key, S Khatiwala, HK Pour, AL Kholodov, M Khoshkam, A Kijazi, T Kikuchi, BM Kim, SJ Kim, TB Kimberlain, JA Knaff, NN Korshunova, T Koskela, VE Kousky, N Kramarova, DP Kratz, R Krishfield, A Kruger, MC Kruk, A Kumar, GSE Lagerloef, K Lakkala, MA Lander, CW Landsea, M Lankhorst, T Laurila, MA Lazzara, C Lee, E Leuliette, S Levitus, M L'Heureux, J Lieser, II Lin, YY Liu, Y Liu, HX Liu, YJ Liu, R Lobato-Sanchez, R Locarnini, NG Loeb, H Loeng, CS Long, AM Lorrey, P Luhunga, R Lumpkin, JJ Luo, JM Lyman, AM Macdonald, BC Maddux, C Malekela, G Manney, SS Marchenko, JA Marengo, J Marotzke, JJ Marra, R Martinez-Guingla, RA Massom, JT Mathis, C McBride, G McCarthy, TR McVicar, C Mears, W Meier, CS Meinen, M Menendez, MA Merrifield, E Mitchard, GT Mitchum, SA Montzka, JJ Morcrette, T Mote, J Muhle, B Muhr, AB Mullan, R Muller, ER Nash, RS Nerem, ML Newlin, PA Newman, H Ng'ongolo, JJ Nieto, S Nishino, H Nitsche, J Noetzli, NG Oberman, A Obregon, LA Ogallo, CS Oludhe, MI Omar, J Overland, L Oyunjargal, RM Parinussa, GH Park, EH Park, D Parker, RJ Pasch, R Pascual-Ramirez, MS Pelto, O Penalba, L Peng, DK Perovich, AB Pezza, D Phillips, R Pickart, B Pinty, MC Pitts, SG Purkey, S Quegan, J Quintana, B Rabe, F Rahimzadeh, N Raholijao, I Raiva, M Rajeevan, V Ramiandrisoa, A Ramos, S Ranivoarissoa, NA Rayner, D Rayner, VN Razuveav, J Reagan, P Reid, J Renwick, J Revedekar, J Richter-Menge, IL Rivera, DA Robinson, M Rodell, VE Romanovsky, J Ronchail, KH Rosenlof, CL Sabine, MA Salvador, A Sanchez-Lugo, ML Santee, I Sasgen, P Sawaengphokhai, A Sayouri, TA Scambos, U Schauer, J Schemm, P Schlosser, C Schmid, C Schreck, I Semiletov, U Send, S Sensoy, A Setzer, J Severinghaus, N Shakhova, M Sharp, NI Shiklomanov, DA Siegel, VBS Silva, FDS Silva, F Sima, P Simeonov, I Simmonds, A Simmons, M Skansi, DA Smeed, WM Smethie, AB Smith, C Smith, SL Smith, TM Smith, V Sokolov, AK Srivastava, Stackhouse PW Jr, S Stammerjohn, M Steele, K Steffen, W Steinbrecht, T Stephenson, J Su, T Svendby, W Sweet, T Takahashi, RM Tanabe, MA Taylor, M Tedesco, WL Teng, JN Thepaut, WM Thiaw, R Thoman, P Thompson, PW Thorne, ML Timmermans, S Tobin, J Toole, BC Trewin, RM Trigo, A Trotman, M Tschudi, RSW van de Wal, GR Van der Werf, R Vautard, JL Vazquez, G Vieira, L Vincent, RS Vose, WW Wagner, J Wahr, J Walsh, JH Wang, CZ Wang, M Wang, SH Wang, L Wang, R Wanninkhof, S Weaver, M Weber, PJ Werdell, R Whitewood, S Wijffels, AC Wilber, JD Wild, KM Willett, W Williams, JK Willis, G Wolken, T Wong, R Woodgate, D Worthy, B Wouters, AJ Wovrosh, Y Xue, R Yamada, ZG Yin, LS Yu, LY Zhang, PQ Zhang, L Zhao, J Zhao, W Zhong, J Ziemke and S Zimmermann (2013), State of the Climate in 2012. Bull. Amer. Meteorol. Soc. Version: 1 94 (8) S1-S238, issn: 0003-0007, ids: 304EZ
  • Petron, G, G Frost, BR Miller, AI Hirsch, SA Montzka, A Karion, M Trainer, C Sweeney, AE Andrews, L Miller, J Kofler, A Bar-Ilan, EJ Dlugokencky, L Patrick, CT Moore, TB Ryerson, C Siso, W Kolodzey, PM Lang, T Conway, P Novelli, K Masarie, B Hall, D Guenther, D Kitzis, J Miller, D Welsh, D Wolfe, W Neff and P Tans (2012), Hydrocarbon emissions characterization in the Colorado Front Range: A pilot study. J. Geophys. Res.-Atmos. Version: 1 117 , Art. No. D04304, issn: 2169-897X, ids: 899DS, doi: 10.1029/2011JD016360
  • Miller, JB, SJ Lehman, SA Montzka, C Sweeney, BR Miller, A Karion, C Wolak, EJ Dlugokencky, J Southon, JC Turnbull and PP Tans (2012), Linking emissions of fossil fuel CO2 and other anthropogenic trace gases using atmospheric (CO2)-C-14. J. Geophys. Res.-Atmos. Version: 1 117 , Art. No. D08302, issn: 2169-897X, ids: 930FM, doi: 10.1029/2011JD017048
  • Hossaini, R, MP Chipperfield, W Feng, TJ Breider, E Atlas, SA Montzka, BR Miller, F Moore and J Elkins (2012), The contribution of natural and anthropogenic very short-lived species to stratospheric bromine. Atmos. Chem. Phys. Version: 1 12 (1) 371-380, issn: 1680-7316, ids: 892XZ, doi: 10.5194/acp-12-371-2012
  • Montzka, SA, M Krol, E Dlugokencky, B Hall, P Jockel and J Lelieveld (2011), Small Interannual Variability of Global Atmospheric Hydroxyl. Science Version: 1 331 (6013) 67-69, issn: 0036-8075, ids: 703JK, doi: 10.1126/science.1197640
  • Battle, MO, JP Severinghaus, ED Sofen, D Plotkin, AJ Orsi, M Aydin, SA Montzka, T Sowers and PP Tans (2011), Controls on the movement and composition of firn air at the West Antarctic Ice Sheet Divide. Atmos. Chem. Phys. Version: 1 11 (21) 11007-11021, issn: 1680-7316, ids: 847IZ, doi: 10.5194/acp-11-11007-2011
  • Stimler, K, JA Berry, SA Montzka and D Yakir (2011), Association between Carbonyl Sulfide Uptake and (18)Delta during Gas Exchange in C-3 and C-4 Leaves. Plant Physiol. Version: 1 157 (1) 509-517, issn: 0032-0889, ids: 814XZ, doi: 10.1104/pp.111.176578
  • Blonquist, JM, SA Montzka, JW Munger, D Yakir, AR Desai, D Dragoni, TJ Griffis, RK Monson, RL Scott and DR Bowling (2011), The potential of carbonyl sulfide as a proxy for gross primary production at flux tower sites. J. Geophys. Res.-Biogeosci. Version: 1 116 , Art. No. G04019, issn: 0148-0227, ids: 851IA, doi: 10.1029/2011JG001723
  • Aydin, M, KR Verhulst, ES Saltzman, MO Battle, SA Montzka, DR Blake, Q Tang and MJ Prather (2011), Recent decreases in fossil-fuel emissions of ethane and methane derived from firn air. Nature Version: 1 476 (7359) 198-201, issn: 0028-0836, ids: 805MU, doi: 10.1038/nature10352
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  • Warneke, C, KD Froyd, J Brioude, R Bahreini, CA Brock, J Cozic, JA de Gouw, DW Fahey, R Ferrare, JS Holloway, AM Middlebrook, L Miller, S Montzka, JP Schwarz, H Sodemann, JR Spackman and A Stohl (2010), An important contribution to springtime Arctic aerosol from biomass burning in Russia. Geophys. Res. Lett. Version: 1 37 , Art. No. L01801, issn: 0094-8276, ids: 542OZ, doi: 10.1029/2009GL041816
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  • Yvon-Lewis, SA, ES Saltzman and SA Montzka (2009), Recent trends in atmospheric methyl bromide: analysis of post-Montreal Protocol variability. Atmos. Chem. Phys. Version: 1 9 (16) 5963-5974, issn: 1680-7316, ids: 489EY
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  • Montzka, SA, BD Hall and JW Elkins (2009), Accelerated increases observed for hydrochlorofluorocarbons since 2004 in the global atmosphere. Geophys. Res. Lett. Version: 1 36 , Art. No. L03804, issn: 0094-8276, ids: 404SV, doi: 10.1029/2008GL036475
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  • Dorf, M, JH Butler, A Butz, C Camy-Peyret, MP Chipperfield, L Kritten, SA Montzka, B Simmes, F Weidner and K Pfeilsticker (2006), Long-term observations of stratospheric bromine reveal slow down in growth. Geophys. Res. Lett. Version: 1 33 (24) , Art. No. L24803, issn: 0094-8276, ids: 118KZ, doi: 10.1029/2006GL027714
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  • TALUKDAR, RK, A MELLOUKI, AM SCHMOLTNER, T WATSON, S MONTZKA and AR RAVISHANKARA (1992), KINETICS OF THE OH REACTION WITH METHYL CHLOROFORM AND ITS ATMOSPHERIC IMPLICATIONS. Science Version: 1 257 (5067) 227-230, issn: 0036-8075, ids: JC585, doi: 10.1126/science.257.5067.227, PubMed ID: 17794755
  • MONTZKA, SA, BM HYBERTSON, RM BARKLEY and RE SIEVERS (1991), LOW-TEMPERATURE OXIDATION OF YBA2CU3O6.0 WITH NITROGEN-DIOXIDE. J. Mater. Res. Version: 1 6 (5) 891-894, issn: 0884-2914, ids: FK039, doi: 10.1557/JMR.1991.0891
  • MONTZKA, SA, RM BARKLEY and RE SIEVERS (1989), CATALYZED REDOX REACTIONS OCCURRING IN A CHEMI-LUMINESCENCE DETECTOR USED FOR ENVIRONMENTAL-ANALYSIS. Version: 1 SOUTH AFRICAN JOURNAL OF CHEMISTRY 42 (2) 81-86, issn: 0379-4350, ids: AF022
  • MCNAMARA, EA, SA MONTZKA, RM BARKLEY and RE SIEVERS (1988), SUPERCONDUCTOR METAL-OXIDE CATALYST IN A CHEMI-LUMINESCENCE CHROMATOGRAPHY DETECTOR. Version: 1 JOURNAL OF CHROMATOGRAPHY 452 75-83, issn: 0021-9673, ids: Q9806, doi: 10.1016/S0021-9673(01)81438-2
  • POURREZA, N, SA MONTZKA, RM BARKLEY, RE SIEVERS and RS HUTTE (1987), CHEMISTRY OCCURRING IN REDOX CHEMILUMINESCENCE DETECTORS FOR CHROMATOGRAPHY. Version: 1 JOURNAL OF CHROMATOGRAPHY 399 165-172, issn: 0021-9673, ids: J7364