Atmospheric Physics and Chemistry Group Home Page

Thomas Röckmann

Short CV:

university education

1995-1998 PhD studies in physics at the University of Heidelberg, Germany
1993-1994 Physics major at the University of Colorado at Boulder
1992-1993 Physics major at the University of Heidelberg, Germany
9/1991-5/1992 Physics and Mathematics major at the University of York, England
1989-1992 Physics and mathematics major at the technical university RWTH Aachen, Germany

scientific career

Since 2005 Professor for atmospheric physics and chemistry at IMAU, Utrecht University
2000-2005 Head of an independent junior research group at the MPI for Nuclear Physics, Atmospheric Physics Division, Heidelberg
1998-2000 Postdoctoral Researcher at the Max Planck Institute for Chemistry, Mainz
1995-1998 Ph.D. thesis at the Max Planck Institute for Chemistry, Mainz

work area and qualifications

Development and application of isotope techniques to investigate physics and chemistry of the atmosphere
Global trace gas budgets
Impact of anthropogenic activities on the atmosphere
Stratosphere-Troposphere exchange
Stratospheric water vapor
Development of air sampling devices for atmospheric trace gases (e.g. high altitude research aircraft "Geophysica", stratospheric balloon experiments)
Investigation of kinetic isotope effects in laboratory experiments
Investigation and application of mass independent isotope effects
Reconstruction of the paleo-atmosphere using air samples from Arctic and Antarctic ice and firn

Publications

2013

Walter, S., Kock, A., and Rö̈ckmann, T.High-resolution measurements of atmospheric molecular hydrogen and its isotopic composition at the West African coast of Mauritania, Biogeosciences, 10, 3391–3403, doi:10.5194/bg-10-3391-2013, 2013.
Schmitt, J., Seth, B., Bock, M., van der Veen, C., Möller, L., Sapart, C. J., Prokopiou, M., Sowers, T., Röckmann, T., and Fischer, H.On the interference of Kr during carbon isotope analysis of methane using continuous-flow combustion–isotope ratio mass spectrometry, Atmos. Meas. Tech., 6, 1425–1445, doi:10.5194/amt-6-1425-2013, 2013.
Dusek, U., ten Brink, H. M., Meijer, H. A. J., Kos, G., Mrozek, D., Röckmann, T., Holzinger, R., and Weijers, E. P, The contribution of fossil sources to the organic aerosol in the Netherlands, Atmospheric Environment, 74, 169-176, doi:10.1016/j.atmosenv.2013.03.015, 2013.
G. Pieterse, M.C. Krol, A. M. Batenburg, C. A. M. Brenninkmeijer, M. E. Popa, S. O'Doherty, A. Grant, L. P. Steele, P. B. Krummel, R. L. Langenfelds, H. J. Wang, A. T. Vermeulen, M. Schmidt, C. Yver, A. Jordan, A. Engel, R. E. Fisher, D. Lowry, E. G. Nisbet, S. Reimann, M. K. Vollmer, M. Steinbacher, S. Hammer, G. Forster, W. T. Sturges, T. Röckmann, Reassessing the variability in atmospheric H2 using the two-way nested TM5 model, J. Geophys. Res, 2013, DOI: 10.1002/jgrd.50204, 2013.
Laube, J.C., A. Keil, H. Bönisch, A. Engel, T. Röckmann, C. M. Volk and W. T. Sturges, Observation-based assessment of stratospheric fractional release, lifetimes, and Ozone Depletion Potentials of ten important source gases, Atmos. Chem. Phys., 13, 2779–2791, 2013.
Bândă, N., M. Krol, M. van Weele, T. van Noije, T., and T. Röckmann, Analysis of global methane changes after the 1991 Pinatubo volcanic eruption, Atmos. Chem. Phys., 13, 2267–2281, 2013.
Keuken, M.P., M. Moerman, M. Voogt, M. Blom, E.P. Weijers, T. Röckmann and U. Dusek, Source contributions to PM2.5 and PM10 at an urban background and a street location, Atmos. Environ. 71, 26-35, 2013.
D. Dahl-Jensen and NEEM community members (including T. Röckmann), Eemian interglacial reconstructed from a Greenland folded ice core, Nature,493, 489–494, doi:10.1038/nature11789, 2013.
Zuiderweg, A., Holzinger, R., Martinerie, P., Schneider, R., Kaiser, J., Witrant, E., Etheridge, D., Rubino, M., Petrenko, V., Blunier, T., and T. Röckmann, Extreme 13C depletion of CCl2F2 in firn air samples from NEEM, Greenland, Atmos. Chem. Phys., 13, 599-609, doi:10.5194/acp-13-599-2013, 2013.

2012

Walter, S., S. Laukenmann, A.J.M. Stams, , M.K. Vollmer, G.Gleixner and T. Röckmann, The stable isotopic signature of biologically produced molecular hydrogen (H2), Biogeosciences, 9, 4115–4123, doi:10.5194/bg-9-4115-2012, 2012.
C. J. Sapart, G. Monteil, M. Prokopiou, R. S. W. van de Wal, J. O. Kaplan, P. Sperlich, K. M. Krumhardt, C. van der Veen, S. Houweling, M. C. Krol, T. Blunier, T. Sowers, P. Martinerie, E. Witrant, D. Dahl-Jensen & T. Röckmann, Natural and anthropogenic variations in methane sources during the past two millennia, Nature, 490, 85–88, 2012. doi:10.1038/nature11461.
P.B. Hooghiemstra, M. C. Krol, T. T. van Leeuwen, G. R. van der Werf, P. C. Novelli, M. N. Deeter, I. Aben, T. Röckmann, Interannual variability of carbon monoxide emission estimates over South America from 2006 to 2010, J. Geophys. Res., 117, D15, DOI: 10.1002/jgrd.50389, 2012.
Beck, V., H. Chen, C. Gerbig, P. Bergamaschi, L. Bruhwiler, S. Houweling, T. Röckmann, O. Kolle, J. Steinbach, C. Frankenberg, M.O. Andreae, P. Artaxo, K.M. Longo, and S.C. Wofsy, Methane airborne measurements and comparison to global models during BARCA, J. Geophys. Res., 117, D15, doi:10.1029/2011JD017345, 2012.
Vollmer, M. K., S. Walter, J. Mohn, M. Steinbacher, S. W. Bond, T. Röckmann, and S. Reimann, Molecular hydrogen (H2) combustion emissions and their isotope (D/H) signatures from domestic heaters, diesel vehicle engines, waste incinerator plants, and biomass burning, Atmos. Chem. Phys., 12, 6275-6289doi:10.5194/acp-12-6275-2012, SRef-ID: 1680-7324/acp/2012-12-6275, 2012.
F. Keppler, I. Vigano, A. McLeod, U. Ott, M. Früchtl, and T. Röckmann, Ultraviolet-radiation-induced methane emissions from meteorites and the Martian atmosphere, Nature, 486, 93096, doi:10.1038/nature11203, 2012.
A.M. Batenburg, T.J. Schuck, A.K. Baker, A. Zahn, C.A.M. Brenninkmeijer, and T. Röckmann, The stable isotopic composition of molecular hydrogen in the tropopause region probed by the CARIBIC aircraft, Atmospheric Chemistry and Physics, Volume 12, May 2012, 4633-4646, doi: 10.5194/acp-12-4633-2012
A. Zuiderweg, J. Kaiser, J. C. Laube, T. Röckmann and R. Holzinger, Stable carbon isotope fractionation in the UV photolysis of CFC-11 and CFC-12, Atmospheric Chemistry and Physics., 12, 4379–4385, doi:10.5194/acp-12-4379-2012, 2012
Laube, J. C., Hogan, C., Newland, M. J., Mani, F. S., Fraser, P. J., Brenninkmeijer, C. A. M., Martinerie, P., Oram, D. E., Röckmann, T., Schwander, J., Witrant, E., Mills, G. P., Reeves, C. E., and Sturges, W. T.: Distributions, long term trends and emissions of four perfluorocarbons in remote parts of the atmosphere and firn air, Atmos. Chem. Phys, 12, 4081-4090,SRef-ID: 1680-7324/acp/2012-12-4081, doi:10.5194/acp-12-4081-2012, 2012.
Derendorp, L., Wishkerman, A., Keppler, F., McRoberts, C., Holzinger, R., and Röckmann, T, Methyl chloride emissions from halophyte leaf litter: Dependence on temperature and chloride content, Chemosphere, 87, 483-489, 2012.
Hooghiemstra, P. B., Krol, M. C., Bergamaschi, P., de Laat, A. T. J., van der Werf, G. R., Novelli, P. C., Deeter, M. N., Aben, I., and T. Röckmann, Comparing optimized CO emission estimates using MOPITT or NOAA surface network observations, J. Geophys. Res., 117, D06309 DOI: 06310.01029/02011JD017043, 2012.
Oram, D. E., Mani, F. S., Laube, J. C., Newland, M. J., Reeves, C. E., Sturges, W. T., Penkett, S. A., Brenninkmeijer, C. A. M., Röckmann, T., and Fraser, P. J.: Long-term tropospheric trend of octafluorocyclobutane (c-C₄F₈ or PFC-318), Atmos. Chem. Phys., 12, 261-269, doi:10.5194/acp-12-261-2012, 2012.

2011

Zuiderweg, A., R. Holzinger, and T. Röckmann, Analytical system for carbon stable isotope measurements of light non-methane hydrocarbons,Atmos. Meas. Tech., 4, 1161–1175, doi:10.5194/amt-4-1161-2011, 2011.
Röckmann, T., M. Brass, R. Borchers and A. Engel, The isotopic composition of methane in the stratosphere: High-altitude balloon sample measurements, Atmos. Chem. Phys., 11, 13287–13304, doi:10.5194/acp-11-13287-2011, 2011.
Derendorp, L., R. Holzinger and T. Röckmann, UV induced emissions of C2–C5 hydrocarbons from leaf litter, Env. Chem. 8, 602-611,http://dx.doi.org/10.1071/EN11024, 2011.
Sapart, C.J., I. Vigano, M. Brass, C. van der Veen, R.S.W. van de Wal, M. Bock, H. Fischer, T. Sowers, C.Buizert, P. Sperlich, T.Blunier, M. Behrens and T. Röckmann. Simultaneous stable isotope analysis of methane and nitrous oxide on ice core samples, Atmos. Meas. Tech., 4, 2607–2618, doi:10.5194/amt-4-2607-2011, 2011.
Lossow, S. J. Steinwagner, J. Urban, C.D. Boone, S. Kellmann, A. Linden, M. Kiefer, U. Grabowski, M. Höpfner, T. Röckmann, D.P. Murtagh, K.A. Walker, T. von Clarmann, and G.P. Stiller, Comparison of HDO measurements from Envisat/MIPAS with observations by Odin/SMR and ACE/FTS, Atmos. Meas. Tech. 4, 1855-1874, doi:10.5194/amt-4-1855-2011, 2011.
Yoshimura, K., C. Frankenberg, M. Kanamitsu, J. Worden and T. Röckmann, Comparison of an isotopic atmospheric general circulation model with new quasi-global satellite measurements of water vapor isotopologues, J. Geophys. Res., 116, D19118, doi:10.1029/2011JD016035, 2011.
Pieterse, G., A. Batenburg, M. C. Krol, T. Röckmann, L. P. Steele, P. B. Krummel, and R. L. Langenfelds, Global modeling of hydrogen mixing ratio and isotopic composition with the TM5 model, Atmos. Chem. Phys., 11, 7001-7026, doi:10.5194/acp-11-7001-2011, 2011.
Batenburg, A.M., S. Walter, G. Pieterse, I. Levin, M. Schmidt, A. Jordan, S. Hammer, C. Yver, and T. Röckmann, Temporal and spatial variability of the stable isotopic composition of atmospheric molecular hydrogen: observations at six EUROHYDROS stations, Atmos. Chem. Phys., 11, 6985-6999, doi:10.5194/acp-11-6985-2011, 2011.
Popa, M.E., A. T. Vermeulen, W.C.M. van den Bulk, P.A.C. Jongejan, A. Batenburg, W. Zahorowski and T. Röckmann, H₂ vertical profiles in the continental boundary layer: measurements at the Cabauw tall tower in the Netherlands, Atmos. Chem. Phys., 11, 6425–6443, doi:10.5194/acp-11-6425-2011, 2011.
J.W.B. Derksen, G.-J. H. Roelofs, and T. Röckmann, Impact of Ammonium Nitrate chemistry on the AOT in Cabauw, the Netherlands, Atmospheric Environment 45, 5640-5646, doi:10.1016/j.atmosenv.2011.02.052, 2011.
Derendorp, L., R. Holzinger, A. Wishkerman, F. Keppler, and T. Röckmann, Methyl chloride and C2-C5 hydrocarbon emissions from dry leaf litter and their dependence on temperature, Atmos. Environ., 45, 3112-3119, doi:10.1016/j.atmosenv.2011.03.016, 2011.
Zuiderweg, A., R. Holzinger, and T. Röckmann, Analytical system for carbon stable isotope measurements of light non-methane hydrocarbons, Atmos. Meas. Tech., 4, 1161–1175, doi:10.5194/amt-4-1161-2011, 2011.
Monteil,G., Houweling, S., Dlugockenky, E.J., Maenhout, G., Vaughn, B.H., White, J.W.C. and Rockmann, T, Interpreting methane variations in the past two decades using measurements of CH4 mixing ratio and isotopic composition,Atmos. Chem. Phys. 11, 9141-9153, doi:10.5194/acp-11-9141-2011, 2011.
P. B. Hooghiemstra, M. C. Krol, J. F. Meirink, P. Bergamaschi, G. R. van der Werf, P. C. Novelli, I. Aben, and T. Rockmann, Optimizing global CO emissions using a four-dimensional variational data assimilation system and surface network observations,Atmos. Chem. Phys., 11, 4705-4723, doi:10.5194/acp-11-4705-2011, 2011
C. A. S. Querino, C. J. P. P. Smeets, I. Vigano, R. Holzinger, V. Moura, L. V. Gatti, A. Martinewski, A. O. Manzi, A. C. de Araújo, and T. Röckmann, Methane flux, vertical gradient and mixing ratio measurements in a tropical forest, Atmos. Chem. Phys., 11, 7943-7953, doi:10.5194/acp-11-7943-2011, 2011

2010

Brass, M., and T. Röckmann, Continuous-flow isotope ratio mass spectrometry method for carbon and hydrogen isotope measurements on atmospheric methane, Atmos. Meas. Tech., 3, 1707-1721, 2010.
Holzinger, R., Kasper-Giebl, A., Staudinger, M., Schauer, G., and Röckmann, T.: Analysis of the chemical composition of organic aerosol at the Mt. Sonnblick observatory using a novel high mass resolution thermal-desorption proton-transfer-reaction mass-spectrometer (hr-TD-PTR-MS), Atmos. Chem. Phys., 10, 10111–10128, doi:10110.15194/acp-10-10111-2010, 2010.
Röckmann, T., C. X. Gómez Álvarez, S. Walter, A. Batenburg, C. van der Veen, A.G. Wollny, S. Gunthe, G. Helas, U. Pöschl, W.A. Brand, The isotopic composition of H₂ from biomass burning - dependency on combustion efficiency, moisture content and δD of local precipitation, J. Geophys. Res., 115, D17308, doi:10.1029/2009JD013188, 2010.
Laube, J.C., P. Martinerie, E. Witrant, T. Blunier, J. Schwander, C. A. M. Brenninkmeijer, T. J. Schuck, M. Bolder, T. Röckmann, C. van der Veen, H. Bönisch, A. Engel, G. P. Mills, M. J. Newland, D. E. Oram, C. E. Reeves, and W. T. Sturges, Accelerating growth of HFC-227ea (1,1,1,2,3,3,3-Heptafluoropropane) in the atmosphere, Atmos. Chem. Phys., 10, 5903-5010, 2010.
Röckmann, T., S. Walter, B. Bohn, R. Wegener, H. Spahn, T. Brauers, R. Tillmann, E. Schlosser, R. Koppmann and F. Rohrer, Isotope effect in the formation of H₂ from H₂CO studied at the atmospheric simulation chamber SAPHIR, Atmos. Chem. Phys., 10, 5343-5357, 2010, www.atmos-chem-phys.net/10/5343/2010, 2010.
Vollmer, M.K., S. Walter, S.W. Bond, P. Soltic and T. Röckmann, Molecular Hydrogen (H2) emissions and their isotopic signatures (H/D) from a motor vehicle: Implications on atmospheric H2, Atmos. Chem. Phys., 10, 5707–5718, www.atmos-chem-phys.net/10/5707/2010/2010, 2010.
Vigano, I., R. Holzinger, F. Keppler, M.Greule, W.A.Brand, H.Geilmann, H. van Weelden and T. Röckmann, Water drives the deuterium content of the methane emitted from plants, Geochim. Cosmochim. Act., 74, 3865-3873, 2010.
Steinwagner, J., S. Fueglistaler, G. Stiller, T. v. Clarmann, M. Kiefer, P.-P. Borsboom, A. v. Delden and T. Röckmann, Tropical dehydration processes constrained by the seasonality of stratospheric deuterated water, Nature Geosciences, 3, 262-266, DOI: 10.1038/NGEO822, 2010.
Holzinger, R., J. Williams, F. Herrmann, J. Lelieveld, N.M. Donahue, and T. Röckmann, Aerosol analysis using a Thermal-Desorption Proton-Transfer-Reaction Mass Spectrometer (TD-PTR-MS): a new approach to study processing of organic aerosols, Atmos. Chem. Phys. 10, 2257–2267, 2010.
Cairo F., J. P. Pommereau, K. S. Law, H. Schlager, A. Garnier, F. Fierli, M. Ern, M. Streibel, S. Arabas, J.J. Berthelier, ,S. Borrmann, C. Blom, T. Christensen, F. D’Amato, G. Di Donfrancesco, T. Deshler, A. Diedhiou, G. Durry, O. Engelsen, F. Goutail, N.R.P. Harris, E.R.T. Kerstel, S. Khaykin, P. Konopka, A. Kylling, N. Larsen, T. Lebel, X. Liu, A.R. MacKenzie, J. Nielsen, A. Oulanowski, D.J. Parker, J. Pelon, J. Polcher, J. A. Pyle, F. Ravegnani, E.D. Riviere, A.D. Robinson, T. Röckmann, C. Schiller, P. Siegmund, F. Simoes, N. Sitnikov, L. Some, L. Stefanutti, F. Stroh, J. P. Vernier, C.M. Volk, C. Voigt, M. von Hobe, S. Viciani, V. Yushkov, An overview of the SCOUT-O3-AMMA stratospheric aircraft, balloons and sondes campaign in West Africa, August 2006: rationale, roadmap and highlights, Atm. Chem. Phys., 10, 2237-2256, 2010.
Laube, J.C., A. Engel, H. Bönisch, T. Möbius, D. R. Worton, W. T. Sturges, M. Braß, and T. Röckmann, Fractional release factors of long-lived halogenated substances in the tropical stratosphere, Atmos. Chem. Phys., 10, 1093-1103, 2010. (Correction: Fractional release factors of long-lived halogenated organic compounds in the tropical stratosphere (vol 10, pg 1093, 2010), Atmos. Chem. Phys., 10, 4975-4975, 2010.)

2009

Keppler, F., M. Boros, C. Frankenberg, J. Lelieveld, A. McLeod, A.M. Pirttilä, T. Röckmann, J.-P. Schnitzler, Methane formation in aerobic environments, Env. Chem., 6, 459–465. doi:10.1071/EN09137, 2009.
Pieterse, G., M. C. Krol and T. Röckmann, A consistent molecular hydrogen isotope chemistry scheme based on simplified structure-activity relationship analysis, Atmos. Chem. Phys. 9, 8503–8529, www.atmos-chem-phys.net/9/8503/2009, 2009
Smeets, C.J.P.P. , R. Holzinger, I. Vigano, A.H. Goldstein, and T. Röckmann, Eddy covariance methane measurements at a Ponderosa pine plantation in California, Atmos. Chem. Phys., 9, 8365-8375, www.atmos-chem-phys.net/9/8365/2009, 2009
Vigano, I., T. Röckmann, R. Holzinger, A. van Dijk, F. Keppler, M.Greule, W.A.Brand, J.van Dongen, H.Geilmann, S.Karojet, H.van Weelden, The stable isotope signature of methane emitted from plant material under UV irradiation, Atmos. Environ. 43, 5637–5646, doi:10.1016/j.atmosenv.2009.07. 046, 2009.
Derksen, J.W.B., G.-J.H. Roelofs, and T. Röckmann, Influence of entrainment of CCN on microphysical properties of warm cumulus, Atmos. Chem. Phys., 9, 6005-6015, 2009.
Frankenberg, C., T. Warneke, K. Yoshimura, I. Aben, A. Butz, N. Deutscher, D. Griffith, F. Hase, J. Notholt, M. Schneider, H. Schrijver, and T. Röckmann, Dynamic Processes Governing Lower-Tropospheric HDO/H₂O Ratios as Observed from Space and Ground, Science, 325, 1374-1377, doi:10.1126/science.11737912009.
Assonov, S. S., C. A. M. Brenninkmeijer, C. Koeppel, and T. Röckmann, CO₂ isotope analyses using large air samples collected on intercontinental flights by the CARIBIC Boeing 767, Rapid Commun Mass Sp, 23, 822-830, 2009.

2008

Kaiser, J. and T. Röckmann, Correction of mass spectrometric isotope ratio measurements for isobaric isotopologues of O₂, CO, CO₂, N₂O and SO₂, Rapid Commun Mass Sp, 22, 3997-4008, 2008.
I. Vigano, H. van Weelden, R. Holzinger, F. Keppler, A. McLeod, and T. Röckmann, Effect of UV radiation and temperature on the emission of methane from plant biomass and structural components, Biogeosciences, 5, 937-947, 2008.
F. Keppler, J.T.G. Hamilton, W.C. McRoberts, I. Vigano, M. Braß and T. Röckmann, Methoxyl groups of plant pectin as a precursor of atmospheric methane: evidence from deuterium labelling studies, New Phytologist, 178, 808-814, doi: 10.111/j.1469-8373.2008.02411.x, 2008.
Jan Fokke Meirink, Peter Bergamaschi, Christian Frankenberg, Monica T. S. d’Amelio, Edward J. Dlugokencky, Luciana V. Gatti, Sander Houweling, John B. Miller, Thomas Röckmann, M. Gabriella Villani, and Maarten Krol, Four-dimensional variational data assimilation for inverse modelling of atmospheric methane emissions: 2. Analysis of SCIAMACHY observations, J. Geophys. Res., in press, 2008.
T.S. Rhee, C.A.M. Brenninkmeijer, and T. Röckmann, Hydrogen Isotope Fractionation in the Photolysis of Formaldehyde, Atmos. Chem. Phys., 8, 1353-1366, www.atmos-chem-phys.net/8/1353/2008, 2008.
S. Houweling, S., G. van der Werf, K. Klein Goldewijk, T. Röckmann and I. Aben, Early anthropogenic emissions and the variation of CH4 and 13CH4 over the last millennium, Glob. Biogeochem. Cycl., 22, GB1002, doi:10.1029/2007GB002961, 2008.
Krol, M.C., J.F. Meirink, P. Bergamaschi, J.E. Mak, D. Lowe, P. Jöckel, S. Houweling and T. Röckmann, What do ¹⁴CO measurements tell us about OH?, Atmos. Chem. Phys., 8, 5033-5044, www.atmos-chem-phys.net/8/5033/2008/, 2008.

2007

S. Houweling, S., G. van der Werf, K. Klein Goldewijk, T. Röckmann and I. Aben, Early anthropogenic emissions and the variation of CH₄ and ¹³CH₄ over the last millennium, Glob. Biogeochem. Cycl, in press, 2007.
Feilberg, K.L. M.S. Johnson, A. Bacak, T. Röckmann and C.J. Nielsen, Relative tropospheric photolysis rates of HCHO and HCDO measured at the European Photoreactor Facility, J. Phys. Chem., in press, 2007
Miller, M.F., T. Röckmann and I. P. Wright, A general solution to the ¹⁷O abundance correction for ¹³C/¹²C determinations from CO₂ isotopologue measurements, including CO₂ characterised by 'mass-independent' oxygen isotope distributions, Geochim. Cosmochim. Acta., 71(13), 3145-3161, 2007.
Tarasova, O.A., C. A. M. Brenninkmeijer, S. S. Assonov, N. F. Elansky, T. Röckmann, and M. A. Sofiev, Atmospheric CO along the Trans-Siberian Railroad and River Ob: source identification using isotope analysis, J. Atmos. Chem., 57, doi: 10.1007/s10874-007-9066-x, 2007.
Krankowsky, D., P. Lämmerzahl, K. Mauersberger, C. Janssen, B. Tuzson, and T. Röckmann, Stratospheric ozone isotope fractionations derived from collected samples, J. Geophys. Res., 112, D08301, doi:10.1029/2006JD007855, 2007.
J. Steinwagner, M. Milz, T. von Clarmann, N. Glatthor, U. Grabowski, M. Höpfner, G. P. Stiller, and T. Röckmann, Global HDO measurements with MIPAS, Atmos. Chem. Phys., 7, 2601-2615, 2007.
Shaheen, R., C. Janssen, and T. Röckmann, Investigations of the Photochemical Isotope Equilibrium between O₂, CO₂ and O₃, Atmos. Chem. Phys., 7, 495-509, 2007.
Kaiser, J., M.G. Hastings, B.Z. Houlton, T. Röckmann and D.M. Sigman, Triple oxygen isotope analysis of nitrate using the denitrifier method and thermal decomposition of N₂O, Anal. Chem., 79,2,599-607, 10.1021/ac061022s, 2007.

2006

Houweling, S., T. Röckmann, I. Aben, M. Krol and F. Keppler, Atmospheric constraints on the global sources of methane from plants, Geophys. Res. Lett, 33, L15821, doi:10.1029/2006GL026162, 2006.
Tarasova, O.A., C.A.M. Brenninkmeijer, S.S Assonov, N.F. Elansky, T. Röckmann and M. Brass, Atmospheric CH₄ along the Trans-Siberian Railroad (TROICA) and River Ob: Source Identification using Stable Isotope Analysis, Atmos. Environ., 40, 5617-5628, 2006.
Kaiser, J., A. Engel, R. Borchers and T. Röckmann, N₂Probing stratospheric transport and chemistry with new balloon and aircraft observations of the meridional and vertical N2O isotope distribution, Atmos. Chem. Phys., 6, 3535-3556,doi:10.5194/acp-6-3535-2006, 2006.
Zahn, A., P. Franz, C. Bechtel, and T. Röckmann, Modelling the budget of middle atmospheric water vapour isotopes, Atmos. Chem. Phys., 6, 2073-2090, 2006.
Keppler, F., J.T.G. Hamilton, M. Braß and T. Röckmann, Methane emissions from terrestrial plants under aerobic conditions, Nature, 187-191, doi:10.1038/nature04420, 187-191, 2006.
Bernard, S., T. Röckmann, J. Kaiser, J.-M. Barnola, H. Fischer, T. Blunier and J. Chappellaz, Constraints on N₂O budget changes since pre-industrial time from new firn air and ice core isotope measurements, Atmos. Chem. Phys.., 6, 493-503, SRef-ID: 1680-7324/acp/2006-6-493, 2006.
Rhee, T.S., C.A.M. Brenninkmeijer and T. Röckmann, The overwhelming role of soils in the global atmospheric hydrogen cycle, Atmos. Chem. Phys. 6, 1611-1625, SRef-ID: 1680-7375/acpd/2006-6-4273, 2006.

2005

Röckmann, T. and I. Levin, High-precision determination of the changing isotopic composition of atmospheric N₂O from 1990 to 2002, J. Geophys. Res., 110, D21304, doi:10.1029/2005JD006066, 2005.
Franz, P. and T. Röckmann, High-precision isotope measurements of H₂¹⁶O, H₂¹⁷O, H₂¹⁸O, and the Δ¹⁷O-anomaly of water vapor in the southern lowermost stratosphere, Atmos. Chem. Phys., 5, 2949-2959, SRef-ID: 1680-7324/acp/2005-5-2949, 2005.
Keppler, F., D. B. Harper, T. Röckmann, R. M. Moore and J. T. G. Hamilton, New insight into the atmospheric chloromethane budget gained using stable carbon isotope ratios, Atmos. Chem. Phys., 5, 2403-2411, SRef-ID: 1680-7324/acp/2005-5-2403, 2005.
Kaiser, J. and T. Röckmann, Absence of isotope exchange in the reaction of N₂O + O(1D) and the global Δ¹⁷O budget of nitrous oxide, Geophys. Res. Lett., 32, 15, L15808, doi:10.1029/2005GL023199, 2005.
Röckmann, T. and J. Kaiser, Comment on "Evidence for O-atom exchange in the O(1D) + N₂O reaction as the source of mass-independent isotopic fractionation in atmospheric N₂O" by Y. L. Yung et al., Geophys. Res. Lett., 32 (11), doi:10.1029/2004GL022149, 2005.

2004

Franz, P. and T. Röckmann, A new continuous flow isotope ratio mass spectrometry system for the analysis of δ²H, δ¹⁷O and δ¹⁸O of small (120 mg) water samples in atmospheric applications, Rap. Commun. Mass Spectrom., 18 (13), 1429-1435, 2004.
Hessberg, P.v., J. Kaiser, M.B. Enghoff, C.A. McLinden, S.L. Sorensen, T. Röckmann, and M.S. Johnson, Ultra-violet absorption cross sections of isotopically substituted nitrous oxide species: ¹⁴N¹⁴NO, ¹⁵N¹⁴NO, ¹⁴N¹⁵NO and ¹⁵N¹⁵NO, Atmos. Chem. Phys., 4, 1237-1253, 2004.
Röckmann, T., J.U. Grooß, and R. Müller, The impact of anthropogenic chlorine, stratospheric ozone change and chemical feedbacks on stratospheric water, Atmos. Chem. Phys., 4, 693-699, 2004.
Kaiser, J., T. Röckmann and C.A.M. Brenninkmeijer, Contribution of mass-dependent fractionation to the oxygen isotope anomaly of atmospheric nitrous oxide, J. Geophys. Res., 109, DOI:10.1029/2003JD004088, 2004.
Kaiser, J., S. Park, K.A. Boering, C.A.M. Brenninkmeijer, A. Hilkert, and T. Röckmann, Mass spectrometric method for the absolute calibration of the intramolecular nitrogen isotope distribution in nitrous oxide, Anal. Bioanal. Chem., 378, 256�269; DOI: 10.1007/s00216-003-2233-2, 2004.
Rhee, T.S., J.E. Mak, T. Röckmann and C.A.M. Brenninkmeijer, Continuous-flow isotope analysis of the D/H ratio in atmospheric hydrogen, Rapid Commun. Mass Spectrom., 18, 299-306, DOI: 10.1002/rcm.1309, 2004.
Bol, R. T. Röckmann, M. Blackwell and S. Yamulki, Influence of flooding on δ¹⁵N, δ¹⁸O, 1δ¹⁵N and 2δ¹⁵N signatures of N₂O released from estuarine soils - a laboratory experiment using tidal flooding chambers, Rapid Commun. Mass Spectrom., 18, 1561-1568, doi: 10.1002/rcm.1519, 2004.

2003

Röckmann, T., T.S. Rhee, A. Engel, Heavy hydrogen in the stratosphere, Atmos. Chem. Phys., 3, 2015-2023, 2003.
Brenninkmeijer, C.A.M., C. Janssen, J. Kaiser, T. Röckmann, T.S. Rhee, and S.S. Assonov, Isotope effects in the chemistry of atmospheric trace gases, Chem. Rev., 103(12); 5125-5162. DOI: 10.1021/cr020644k, 2003.
Röckmann, T., J. Kaiser, C.A.M. Brenninkmeijer, and Willi A. Brand Gas-chromatography, isotope-ratio mass spectrometry method for high-precision position-dependent ¹⁵N and ¹⁸O measurements of atmospheric nitrous oxide, Rapid Commun. Mass Spectrom. 17, 1897-1908, 2003.
Kaiser, J., T. Röckmann and C.A.M. Brenninkmeijer, Complete and accurate mass-spectrometric isotope analysis of tropospheric nitrous oxide, J. Geophys. Res. 108, DOI: 10,1029/2003JD003613, 2003.
Röckmann, T., J. Kaiser, and C.A.M. Brenninkmeijer, The isotopic fingerprint of the pre-industrial and the anthropogenic N₂O source, Atmos. Chem. Phys., 3, 315-323, 2003.
Kaiser, J., C.A.M. Brenninkmeijer, and T. Röckmann, Assessment of ¹⁵N¹⁵N¹⁶O as a tracer of stratospheric processes, Geophys. Res. Lett., 30, DOI: 10.1029/2002GL016073, 2003.
Kaiser, J., C.A.M. Brenninkmeijer, T. Röckmann, and P.J. Crutzen, Wavelength dependence of isotope fractionation in N₂O photolysis, Atmos. Chem. Phys., 3, 303-313, 2003.

2002

Röckmann, T., P. Jöckel, V. Gros, M. Bräunlich, G. Possnert and C.A.M. Brenninkmeijer, Using ¹⁵N, ¹⁵N, ¹⁸O and ¹⁷O isotopic variations to provide insights into the high northern latitude surface CO inventory, Atmos. Chem. Phys., 2, 147-159, 2002.
Kaiser, J., C.A.M. Brenninkmeijer, and T. Röckmann, Temperature dependence of isotope fractionation in N₂O photolysis, Phys. Chem. Chem. Phys., 4, DOI: 10.1039/b204837j, 2002.
Lämmerzahl, P., T. Röckmann, C.A.M. Brenninkmeijer, D. Krankowsky, and K. Mauersberger, The unusual oxygen isotope composition of stratospheric carbon dioxide, Geophys. Res. Lett., 12, DOI: 10.1029/2001GL014343, 2002.
Kaiser, J., C.A.M. Brenninkmeijer, and T. Röckmann, Intramolecular ¹⁵N and ¹⁸O fractionation in the reaction of N₂O with O(1D) and its implications for the stratospheric N₂O isotope signature, J. Geophys. Res., 107, DOI: 10.1029/2001JD001506, 2002.
Gros, V., P. Jöckel, C.A.M. Brenninkmeijer, T. Röckmann, F. Meinhardt and R. Graul, Characterization of pollution events observed at Schauinsland, Germany, using CO and its stable isotopes, Atmos. Environ., 36, 2831-2840, 2002.

2001

Röckmann, T., J. Kaiser, J.N. Crowley, C.A.M. Brenninkmeijer, and P.J. Crutzen, The origin of the anomalous or "mass-independent" oxygen isotope fractionation in tropospheric N₂O, Geophys. Res. Lett. 28, 503-506, 2001.
Röckmann, T., J. Kaiser, C.A.M. Brenninkmeijer, J.N. Crowley, R. Borchers, W.A. Brand, and P.J. Crutzen, Isotopic enrichment of nitrous oxide (¹⁵N¹⁴N¹⁶O, ¹⁴N¹⁵N¹⁶O and ¹⁴N¹⁴N¹⁸O) in the stratosphere and in the laboratory, J. Geophys. Res. 106, 10403-10410, 2001.
Brenninkmeijer, C.A.M., C. Köppel, T. Röckmann, D.S. Scharffe, M. Bräunlich, and V. Gros, Absolute measurement of the abundance of atmospheric carbon monoxide, J. Geophys. Res. 106, 10003-10010, 2001.
Gros, V., M. Bräunlich, T. Röckmann, P. Jöckel, P. Bergamaschi, C.A.M. Brenninkmeijer, W. Rom, W. Kutschera, A. Kaiser, H.E. Scheel, M. Mandl, J. van der Plicht, and G. Possnert, Detailed analysis of the isotopic composition of CO and characterization of the air masses arriving at Mount Sonnblick (Austrian Alps), J. Geophys. Res. 106, 3179-3193, 2001.
Röckmann, T., J. Kaiser, C.A.M. Brenninkmeijer, W.A. Brand, R. Borchers, J.N. Crowley, M. Wollenhaupt, and P.J. Crutzen, The position dependent ¹⁵N enrichment of nitrous oxide in the stratosphere, Isot. Environ. Health. Sc. 37, 91-95, 2001.

2000

Röckmann, T., C.A.M. Brenninkmeijer, M. Wollenhaupt, J.N. Crowley, and P.J. Crutzen, Measurement of the isotopic fractionation of ¹⁵N¹⁴N¹⁶O, ¹⁴N¹⁵N¹⁶O and ¹⁴N¹⁴N¹⁸O in the UV photolysis of nitrous oxide, Geophys. Res. Lett. 27, 1399-1402, 2000.
Johnston, J.C., T. Röckmann, and C.A.M. Brenninkmeijer, CO₂ + O(1D) isotopic exchange: Laboratory and modeling studies, J. Geophys. Res. 105, 15213-15229, 2000.
Rom, W., C.A.M. Brenninkmeijer, C.B. Ramsey, W. Kutschera, A. Priller, S. Puchegger, T. Röckmann, and P. Steier, Methodological aspects of atmospheric ¹⁴CO measurements with AMS, Nucl. Instr. Meth. Phys. Res. B, 172, 530-536, 2000.
Rom, W., C.A.M. Brenninkmeijer, M. Bräunlich, R. Golser, M. Mandl, A. Kaiser, W. Kutschera, A. Priller, S. Puchegger, T. Röckmann, P. Steier, A detailed 2-year record of atmospheric ¹⁴CO in the temperate northern hemisphere, Nucl. Instr. Meth. Phys. Res. B, 161, 780-785, 2000.
Kato, S., Y. Kajii, H. Akimoto, M. Bräunlich, T. Röckmann, and C.A.M. Brenninkmeijer, Observed and modeled seasonal variation of ¹³C, ¹⁸O and ¹⁴C of atmospheric CO Happo, a remote site in Japan, and a comparison with other records, J. Geophys. Res. 105, 8891-8900, 2000.

1999

Brenninkmeijer, C.A.M. and T. Röckmann, Mass spectrometry of the intra-molecular nitrogen isotope distribution of environmental nitrous oxide using fragment-ion analysis, Rap. Commun. Mass. Spectrom. 13, 2028-2033, 1999.
Röckmann, T., C.A.M. Brenninkmeijer, M. Hahn and N.F. Elansky, CO mixing and isotope ratios across Russia; trans-Siberian railroad expedition TROICA 3, April 1997, Chemosphere: Global Change Science 1, 219-231, 1999.
Brenninkmeijer, C.A.M., T. Röckmann, M. Bräunlich, P. Jöckel, and P. Bergamaschi, Review of Progress in Isotope Studies of Atmospheric Carbon Monoxide, Chemosphere: Global Change Science 1, 33-52, 1999.
Röckmann, T., C. A. M. Brenninkmeijer, P.J. Crutzen and U. Platt, Short term variations in the ¹³C/¹²C ratio of CO as a measure of Cl activation during tropospheric ozone depletion events in the Arctic, J. Geophys. Res. 104, 1691-1697, 1999.
Kato S., H. Akimoto, T. Röckmann, M. Bräunlich and C.A.M. Brenninkmeijer, Stable isotopic compositions of carbon monoxide from biomass burning experiments, Atmospheric Environment 33, 4357-4362, 1999.
Kato S., H. Akimoto, T. Röckmann, M. Bräunlich and C.A.M. Brenninkmeijer, Measurements of stable carbon and oxygen isotopic compositions of CO in automobile exhausts and ambient air from semi-urban Mainz, Germany, Geochemical Journal 33, 73-77, 1999.

1998

Röckmann, T., C.A.M. Brenninkmeijer, G. Saueressig, P. Bergamaschi, J.N. Crowley, H. Fischer and P.J. Crutzen, Mass independent fractionation of oxygen isotopes in atmospheric CO due to the reaction CO + OH, Science 281, 544-546, 1998.
Röckmann, T., C. A. M. Brenninkmeijer, P. Neeb and P.J. Crutzen, Ozonolysis of nonmethane hydrocarbons as a source of the observed mass independent oxygen isotope enrichment in tropospheric CO, J. Geophys. Res. 103, 1463-1470, 1998.
Brenninkmeijer, C.A.M. and T. Röckmann, A rapid method for the preparation of O₂ from CO₂ for mass spectrometric analysis of ¹⁷O/¹⁶O ratios, Rap. Commun. Mass Spectrom. 12, 479-483, 1998.
Röckmann, T. and C.A.M. Brenninkmeijer, The error in conventionally reported ¹³C/¹²C ratios of atmospheric CO due to the presence of mass independent oxygen isotope enrichment, Geophys. Res. Lett. 25, 3163-3166, 1998.
Bergamaschi, P., C. A. M. Brenninkmeijer, M. Hahn, T. Röckmann, D.H. Scharffe, P.J. Crutzen, N.F. Elansky, I.B. Belikov, N.B.A. Trivett and D.E.J. Worthy, Isotope analysis based source identification for atmospheric CH₄ and CO across Russia using the Trans-Siberian railroad, J. Geophys. Res. 103, 8227-8235, 1998.
Crutzen, P. J., N. F. Elansky, M. Hahn, G.S: Golitsyn, C.A.M. Brenninkmeijer, D.H. Scharffe, I.B. Belikov, M. Maiss, P.Bergamaschi, T. Röckmann, A.M. Grisenko, and V.M. Sevostyanov, Trace gas measurements between Moscow and Vladivostok using the Trans-Siberian railroad, J. Atmosph. Chem. 29, 179-194, 1998.

1997

Brenninkmeijer, C.A.M. and T. Röckmann, Principal factors determining the ¹⁸O/¹⁶O ratio of atmospheric CO as derived from observations in the southern hemispheric troposphere and lowermost stratosphere, J. Geophys. Res. 102, 25477-25485, 1997.
Röckmann, T. and C. A. M. Brenninkmeijer, CO and CO₂ isotopic composition in Spitsbergen during the 1995 ARCTOC campaign, Tellus 49B, 455-465, 1997.

1996

Brenninkmeijer, C.A.M. and T. Röckmann, Russian doll type cryogenic traps: Improved design and isotope separation effects, Anal. Chem. 68, 3050-3053, 1996.

Book contributions:

Gros, V., C.A.M. Brenninkmeijer, P. Jöckel, J. Kaiser, D. Lowry, E.G. Nisbet, P. O'Brian, T. Röckmann, and N. Warwick, Isotope signatures of trace gas sources, in Emissions of chemical species and aerosols in the atmosphere, edited by C. Granier, in press, Kluwer, Paris, 2004.

Habilitation thesis, Ph.D. thesis and Masters thesis:

Röckmann, T., A comprehensive isotopic characterization of nitrous oxide as a tool to understand its global atmospheric budget, Habilitation thesis, University of Heidelberg, Heidelberg, 2002.
Röckmann, T., Measurement and Interpretation of ¹³C, ¹⁴C, ¹⁷O and ¹⁸O Variations in Atmospheric Carbon Monoxide, Ph.D. thesis, University of Heidelberg, Heidelberg, Germany, 1998.
Röckmann, T., Feasibility of measuring d¹³C in atmospheric methane from small air samples using a cryofocused Gas Chromatography-Isotope Ratio Mass Spectrometry technique, M.Sc. thesis, University of Colorado, Physics Department, Boulder, Colorado, 1994

Other publications:

Keppler F., and T. Röckmann, Methane, plants and climate change, Scientific American 296 (2): 52-57 FEB 2007