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

  • Fibiger, DL; McDuffie, EE; Dube, WP; Aikin, KC; Lopez-Hilfiker, FD; Lee, BH; Green, JR; Fiddler, MN; Holloway, JS; Ebben, C; Sparks, TL; Wooldridge, P; Weinheimer, AJ; Montzka, DD; Apel, EC; Hornbrook, RS; Hills, AJ; Blake, NJ; DiGangi, JP; Wolfe, GM; Bililign, S; Cohen, RC; Thornton, JA; Brown, SS (2018), Wintertime Overnight NOx Removal in a Southeastern United States Coal-fired Power Plant Plume: A Model for Understanding Winter NOx Processing and its Implications. J. Geophys. Res.-Atmos. Version: 1 123 (2) 1412-1425, issn: 2169-897X, ids: FW7QV, doi: 10.1002/2017JD027768
  • Li, S; Park, S; Lee, JY; Ha, KJ; Park, MK; Jo, CO; Oh, H; Muhle, J; Kim, KR; Montzka, SA; ODoherty, S; Krummel, PB; Atlas, E; Miller, BR; Moore, F; Weiss, RF; Wofsy, SC (2018), Chemical evidence of inter-hemispheric air mass intrusion into the Northern Hemisphere mid-latitudes. Sci Rep Version: 1 8 , Art. No. 4669, issn: 2045-2322, ids: FZ4TW, doi: 10.1038/s41598-018-22266-0, PubMed ID: 29549350
  • Zhang, G, B Yao, MK Vollmer, SA Montzka, J Muhle, RF Weiss, S ODoherty, Y Li, SX Fang and S Reimann (2017), Ambient mixing ratios of atmospheric halogenated compounds at five background stations in China. Atmos. Environ. Version: 1 160 55-69, issn: 1352-2310, ids: EW2TW, doi: 10.1016/j.atmosenv.2017.04.017
  • Pan, LL; Atlas, EL; Salawitch, RJ; Honomichl, SB; Bresch, JF; Randel, WJ; Apel, EC; Hornbrook, RS; Weinheimer, AJ; Anderson, DC; Andrews, SJ; Baidar, S; Beaton, SP; Campos, TL; Carpenter, LJ; Chen, D; Dix, B; Donets, V; Hall, SR; Hanisco, TF; Homeyer, CR; Huey, LG; Jensen, JB; Kaser, L; Kinnison, DE; Koenig, TK; Lamarque, JF; Liu, C; Luo, J; Luo, ZJ; Montzka, DD; Nicely, JM; Pierce, RB; Riemer, DD; Robinson, T; Romashkin, P; Saiz-Lopez, A; Schauffler, S; Shieh, O; Stell, MH; Ullmann, K; Vaughan, G; Volkamer, R; Wolfe, G (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, PubMed ID: 29636590
  • Jeong, S, XG Cui, DR Blake, B Miller, SA Montzka, A Andrews, A Guha, P Martien, RP Bambha, B LaFranchi, HA Michelsen, CB Clements, P Glaize and ML Fischer (2017), Estimating methane emissions from biological and fossil-fuel sources in the San Francisco Bay Area. Geophys. Res. Lett. Version: 1 44 (1) 486-495, issn: 0094-8276, ids: EK5GM, doi: 10.1002/2016GL071794
  • Campbell, JE, JA Berry, U Seibt, SJ Smith, SA Montzka, T Launois, S Belviso, L Bopp and M Laine (2017), Large historical growth in global terrestrial gross primary production. Nature Version: 1 544 (7648) 84-87, issn: 0028-0836, ids: EQ8GQ, doi: 10.1038/nature22030
  • Bruhwiler, LM; Basu, S; Bergamaschi, P; Bousquet, P; Dlugokencky, E; Houweling, S; Ishizawa, M; Kim, H-S; Locatelli, R; Maksyutov, S; Montzka, S; Pandey, S; Patra, PK; Petron, G; Saunois, M; Sweeney, C; Schwietzke, S; Tans, P; Weatherhead, EC (2017), US CH4 emissions from oil and gas production: Have recent large increases been detected?. J. Geophys. Res.-Atmos. Version: 1 122 (7) 4070-4083, issn: 2169-897X, ids: ET3IP, doi: 10.1002/2016JD026157
  • Yokouchi, Y, T Saito, JY Zeng, H Mukai and S Montzka (2017), Seasonal variation of bromocarbons at Hateruma Island, Japan: implications for global sources. J. Atmos. Chem. Version: 1 74 (2) 171-185, issn: 0167-7764, ids: EV0TJ, doi: 10.1007/s10874-016-9333-9
  • Hilton, TW, ME Whelan, A Zumkehr, S Kulkarni, JA Berry, IT Baker, SA Montzka, C Sweeney, BR Miller and JE Campbell (2017), Peak growing season gross uptake of carbon in North America is largest in the Midwest USA. Nature Clim. Chang. Version: 1 7 (6) 450-+, issn: 1758-678X, ids: EW4GZ, doi: 10.1038/NCLIMATE3272
  • Meinshausen, M, E Vogel, A Nauels, K Lorbacher, N Meinshausen, DM Etheridge, PJ Fraser, SA Montzka, PJ Rayner, CM Trudinger, PB Krummel, U Beyerle, JG Canadell, JS Daniel, IG Enting, RM Law, CR Lunder, S ODoherty, RG Prinn, S Reimann, M Rubino, GJM Velders, MK Vollmer, RHJ Wang and R Weiss (2017), Historical greenhouse gas concentrations for climate modelling (CMIP6). Geosci. Model Dev. Version: 1 10 (5) 2057-2116, issn: 1991-959X, ids: EW3RF, doi: 10.5194/gmd-10-2057-2017
  • Liang, Q; Chipperfield, MP; Fleming, EL; Abraham, NL; Braesicke, P; Burkholder, JB; Daniel, JS; Dhomse, S; Fraser, PJ; Hardiman, SC; Jackman, CH; Kinnison, DE; Krummel, PB; Montzka, SA; Morgenstern, O; McCulloch, A; Muhle, J; Newman, PA; Orkin, VL; Pitari, G; Prinn, RG; Rigby, M; Rozanov, E; Stenke, A; Tummon, F; Velders, GJM; Visioni, D; Weiss, RF (2017), Deriving Global OH Abundance and Atmospheric Lifetimes for Long-Lived Gases: A Search for CH3CCl3 Alternatives. J. Geophys. Res.-Atmos. Version: 1 122 (21) 11914-11933, issn: 2169-897X, ids: FO9GH, doi: 10.1002/2017JD026926
  • Rigby, M; Montzka, SA; Prinn, RG; White, JWC; Young, D; ODoherty, S; Lunt, MF; Ganesan, AL; Manning, AJ; Simmonds, PG; Salameh, PK; Harth, CM; Muhle, J; Weiss, RF; Fraser, PJ; Steele, LP; Krummel, PB; McCulloch, A; Park, S (2017), Role of atmospheric oxidation in recent methane growth. Proc. Natl. Acad. Sci. U. S. A. Version: 1 114 (21) 5373-5377, issn: 0027-8424, ids: EV5IL, doi: 10.1073/pnas.1616426114, PubMed ID: 28416657
  • Hu, L; Montzka, SA; Lehman, SJ; Godwin, DS; Miller, BR; Andrews, AE; Thoning, K; Miller, JB; Sweeney, C; Siso, C; Elkins, JW; Hall, BD; Mondeel, DJ; Nance, D; Nehrkorn, T; Mountain, M; Fischer, ML; Biraud, SC; Chen, HL; Tans, PP (2017), Considerable contribution of the Montreal Protocol to declining greenhouse gas emissions from the United States. Geophys. Res. Lett. Version: 1 44 (15) 8075-8083, issn: 0094-8276, ids: FE7HU, doi: 10.1002/2017GL074388
  • Hossaini, R, MP Chipperfield, SA Montzka, AA Leeson, SS Dhomse and JA Pyle (2017), The increasing threat to stratospheric ozone from dichloromethane. Nature Commun. Version: 1 8 , Art. No. 15962, issn: 2041-1723, ids: EY6YG, doi: 10.1038/ncomms15962
  • Koenig, TK; Volkamer, R; Baidar, S; Dix, B; Wang, SY; Anderson, DC; Salawitch, RJ; Wales, PA; Cuevas, CA; Fernandez, RP; Saiz-Lopez, A; Evans, MJ; Sherwen, T; Jacob, DJ; Schmidt, J; Kinnison, D; Lamarque, JF; Apel, EC; Bresch, JC; Campos, T; Flocke, FM; Hall, SR; Honomichl, SB; Hornbrook, R; Jensen, JB; Lueb, R; Montzka, DD; Pan, LL; Reeves, JM; Schauffler, SM; Ullmann, K; Weinheimer, AJ; Atlas, EL; Donets, V; Navarro, MA; Riemer, D; Blake, NJ; Chen, DX; Huey, LG; Tanner, DJ; Hanisco, TF; Wolfe, GM (2017), BrO and inferred Br-y profiles over the western Pacific: relevance of inorganic bromine sources and a Br-y minimum in the aged tropical tropopause layer. Atmos. Chem. Phys. Version: 1 17 (24) 15245-15270, issn: 1680-7316, ids: FQ9LJ, doi: 10.5194/acp-17-15245-2017
  • Campbell, JE; Whelan, ME; Berry, JA; Hilton, TW; Zumkehr, A; Stinecipher, J; Lu, Y; Kornfeld, A; Seibt, U; Dawson, TE; Montzka, SA; Baker, IT; Kulkarni, S; Wang, Y; Herndon, SC; Zahniser, MS; Commane, R; Loik, ME (2017), Plant Uptake of Atmospheric Carbonyl Sulfide in Coast Redwood Forests. J. Geophys. Res.-Biogeosci. Version: 1 122 (12) 3391-3404, issn: 2169-8953, ids: FT5VM, doi: 10.1002/2016JG003703
  • 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
  • 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
  • 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
  • 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
  • Cambaliza, MOL; Shepson, PB; Bogner, J; Caulton, DR; Stirm, B; Sweeney, C; Montzka, SA; Gurney, KR; Spokas, K; Salmon, OE; Lavoie, TN; Hendricks, A; Mays, K; Turnbull, J; Miller, BR; Lauvaux, T; Davis, K; Karion, A; Moser, B; Miller, C; Obermeyer, C; Whetstone, J; Prasad, K; Miles, N; Richardson, S (2015), Quantification and source apportionment of the methane emission flux from the city of Indianapolis. Elementa-Sci. Anthrop. Version: 1 3 , Art. No. 37, issn: 2325-1026, ids: CS5HD, doi: 10.12952/journal.elementa.000037
  • 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
  • Ou-Yang, CF; Chang, CC; Chen, SP; Chew, C; Lee, BR; Chang, CY; Montzka, SA; Dutton, GS; Butler, JH; Elkins, JW; Wang, JL (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
  • 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
  • Graziosi, F; Arduini, J; Furlani, F; Giostra, U; Kuijpers, LJM; Montzka, SA; Miller, BR; ODoherty, SJ; Stohl, A; Bonasoni, P; Maione, M (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
  • Sweeney, C; Karion, A; Wolter, S; Newberger, T; Guenther, D; Higgs, JA; Andrews, AE; Lang, PM; Neff, D; Dlugokencky, E; Miller, JB; Montzka, SA; Miller, BR; Masarie, KA; Biraud, SC; Novelli, PC; Crotwell, M; Crotwell, AM; Thoning, K; Tans, PP (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
  • Montzka, SA; McFarland, M; Andersen, SO; Miller, BR; Fahey, DW; Hall, BD; Hu, L; Siso, C; Elkins, JW (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
  • 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
  • Hu, L; Montzka, SA; Miller, JB; Andrews, AE; Lehman, SJ; Miller, BR; Thoning, K; Sweeney, C; Chen, HL; Godwin, DS; Masarie, K; Bruhwiler, L; Fischer, ML; Biraud, SC; Torn, MS; Mountain, M; Nehrkorn, T; Eluszkiewicz, J; Miller, S; Draxler, RR; Stein, AF; Hall, BD; Elkins, JW; Tans, PP (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
  • Caulton, DR; Shepson, PB; Santoro, RL; Sparks, JP; Howarth, RW; Ingraffea, AR; Cambaliza, MOL; Sweeney, C; Karion, A; Davis, KJ; Stirm, BH; Montzka, SA; Miller, BR (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
  • Xiang, B; Patra, PK; Montzka, SA; Miller, SM; Elkins, JW; Moore, FL; Atlas, EL; Miller, BR; Weiss, RF; Prinn, RG; Wofsy, SC (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
  • 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
  • Petron, G; Karion, A; Sweeney, C; Miller, BR; Montzka, SA; Frost, GJ; Trainer, M; Tans, P; Andrews, A; Kofler, J; Helmig, D; Guenther, D; Dlugokencky, E; Lang, P; Newberger, T; Wolter, S; Hall, B; Novelli, P; Brewer, A; Conley, S; Hardesty, M; Banta, R; White, A; Noone, D; Wolfe, D; Schnell, R (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
  • Patra, PK; Krol, MC; Montzka, SA; Arnold, T; Atlas, EL; Lintner, BR; Stephens, BB; Xiang, B; Elkins, JW; Fraser, PJ; Ghosh, A; Hintsa, EJ; Hurst, DF; Ishijima, K; Krummel, PB; Miller, BR; Miyazaki, K; Moore, FL; Muhle, J; ODoherty, S; Prinn, RG; Steele, LP; Takigawa, M; Wang, HJ; Weiss, RF; Wofsy, SC; Young, D (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
  • Berkelhammer, M; Asaf, D; Still, C; Montzka, S; Noone, D; Gupta, M; Provencal, R; Chen, H; Yakir, D (2014), Constraining surface carbon fluxes using in situ measurements of carbonyl sulfide and carbon dioxide. Glob. Biogeochem. Cycle Version: 1 28 (2) 161-179, issn: 0886-6236, ids: AD1SP, doi: 10.1002/2013GB004644
  • Rhoderick, GC; Duewer, DL; Apel, E; Baldan, A; Hall, B; Harling, A; Helmig, D; Heo, GS; Hueber, J; Kim, ME; Kim, YD; Miller, B; Montzka, S; Riemer, D (2014), International Comparison of a Hydrocarbon Gas Standard at the Picomol per Mol Level. Anal. Chem. Version: 1 86 (5) 2580-2589, issn: 0003-2700, ids: AC4LZ, doi: 10.1021/ac403761u, PubMed ID: 24555659
  • 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
  • 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
  • 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
  • LaFranchi, BW; Petron, G; Miller, JB; Lehman, SJ; Andrews, AE; Dlugokencky, EJ; Hall, B; Miller, BR; Montzka, SA; Neff, W; Novelli, PC; Sweeney, C; Turnbull, JC; Wolfe, DE; Tans, PP; Gurney, KR; Guilderson, TP (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; Crotwell, AM; Dlugokencky, EJ; Dutton, GS; Elkins, JW; Hall, BD; Hintsa, EJ; Hurst, DF; Montzka, SA; Mondeel, DJ; Moore, FL; Nance, JD; Ray, EA; Steenrod, SD; Strahan, SE; Sweeney, C (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
  • Rigby, M; Prinn, RG; ODoherty, S; Montzka, SA; McCulloch, A; Harth, CM; Muhle, J; Salameh, PK; Weiss, RF; Young, D; Simmonds, PG; Hall, BD; Dutton, GS; Nance, D; Mondeel, DJ; Elkins, JW; Krummel, PB; Steele, LP; Fraser, PJ (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
  • 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
  • Lehman, SJ; Miller, JB; Wolak, C; Southon, J; Tans, PP; Montzka, SA; Sweeney, C; Andrews, A; LaFranchi, B; Guilderson, TP; Turnbull, JC (2013), ALLOCATION OF TERRESTRIAL CARBON SOURCES USING (CO2)-C-14: METHODS, MEASUREMENT, AND MODELING. Radiocarbon Version: 1 21st International Radiocarbon Conference 55 (3-Feb) 1484-1495, Paris, FRANCE, 2012, issn: 0033-8222, ids: 235WK, doi: 10.1017/S0033822200048414
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