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Wendt, Kathleen A; Nehrbass-Ahles, Christoph; Niezgoda, Kyle; Noone, David; Kalk, Michael; Menviel, Laurie; Gottschalk, Julia; Rae, James W B; Schmitt, Jochen; Fischer, Hubertus; Stocker, Thomas F; Muglia, Juan; Ferreira, David; Marcott, Shaun A; Brook, Edward; Buizert, Christo (2024). Southern Ocean drives multidecadal atmospheric CO2 rise during Heinrich Stadials. Proceedings of the National Academy of Sciences of the United States of America - PNAS, 121(21) National Academy of Sciences 10.1073/pnas.2319652121
Nisbet, Euan G.; Manning, Martin R.; Dlugokencky, Ed J.; Michel, Sylvia Englund; Lan, Xin; Röckmann, Thomas; Denier van der Gon, Hugo A. C.; Schmitt, Jochen; Palmer, Paul I.; Dyonisius, Michael N.; Oh, Youmi; Fisher, Rebecca E.; Lowry, David; France, James L.; White, James W. C.; Brailsford, Gordon; Bromley, Tony (2023). Atmospheric Methane: Comparison Between Methane's Record in 2006–2022 and During Glacial Terminations. Global biogeochemical cycles, 37(8) American Geophysical Union 10.1029/2023GB007875
Dyonisius, Michael N.; Petrenko, Vasilii V.; Smith, Andrew M.; Hmiel, Benjamin; Neff, Peter D.; Yang, Bin; Hua, Quan; Schmitt, Jochen; Shackleton, Sarah A.; Buizert, Christo; Place, Philip F.; Menking, James A.; Beaudette, Ross; Harth, Christina; Kalk, Michael; Roop, Heidi A.; Bereiter, Bernhard; Armanetti, Casey; Vimont, Isaac; Englund Michel, Sylvia; ... (2023). Using ice core measurements from Taylor Glacier, Antarctica, to calibrate in situ cosmogenic 14 C production rates by muons. The Cryosphere, 17(2), pp. 843-863. Copernicus Publications 10.5194/tc-17-843-2023
Riddell-Young, Ben; Rosen, Julia; Brook, Edward; Buizert, Christo; Martin, Kaden; Lee, James; Edwards, Jon; Mühl, Michaela; Schmitt, Jochen; Fischer, Hubertus; Blunier, Thomas (2023). Atmospheric methane variability through the Last Glacial Maximum and deglaciation mainly controlled by tropical sources. Nature geoscience, 16(12), pp. 1174-1180. Springer Nature 10.1038/s41561-023-01332-x
Schmidely, Loïc; Nehrbass-Ahles, Christoph; Schmitt, Jochen; Han, Juhyeong; Silva, Lucas; Shin, Jinwha; Joos, Fortunat; Chappellaz, Jerome; Fischer, Hubertus; Stocker, Thomas F. (2021). CH4 and N2O fluctuations during the penultimate deglaciation. Climate of the past, 17(4), pp. 1627-1643. Copernicus Publications 10.5194/cp-17-1627-2021
Yu, Zicheng; Joos, Fortunat; Bauska, Thomas K.; Stocker, Benjamin D.; Fischer, Hubertus; Loisel, Julie; Brovkin, Victor; Hugelius, Gustaf; Nehrbass-Ahles, Christoph; Kleinen, Thomas; Schmitt, Jochen (2021). No support for carbon storage of >1,000 GtC in northern peatlands. Nature geoscience, 14(7), pp. 465-467. Springer Nature 10.1038/s41561-021-00769-2
Lehmann, Prisca (2021). Development of a new measurement system for 15N of ammonium in polar ice cores. (Dissertation, Abteilung Klima- und Umweltpyhsik, Physikalisches Institut, Universität Bern, Philosophisch-Naturwissenschaftliche Fakultät)
Haeberli, Marcel; Baggenstos, Daniel; Schmitt, Jochen; Grimmer, Markus; Michel, Adrien; Kellerhals, Thomas; Fischer, Hubertus (2021). Snapshots of mean ocean temperature over the last 700 000 years using noble gases in the EPICA Dome C ice core. Climate of the past, 17(2), pp. 843-867. Copernicus Publications 10.5194/cp-17-843-2021
Nehrbass-Ahles, C.; Shin, J.; Schmitt, J.; Bereiter, B.; Joos, F.; Schilt, A.; Schmidely, L.; Silva, L.; Teste, G.; Grilli, R.; Chappellaz, J.; Hodell, D.; Fischer, H.; Stocker, T.F. (2020). Abrupt CO2 release to the atmosphere under glacial and early interglacial climate conditions. Science, 369(6506), pp. 1000-1005. American Association for the Advancement of Science 10.1126/science.aay8178
Lee, James E.; Edwards, Jon S.; Schmitt, Jochen; Fischer, Hubertus; Bock, Michael; Brook, Edward J. (2020). Excess methane in Greenland ice cores associated with high dust concentrations. Geochimica et cosmochimica acta, 270, pp. 409-430. Elsevier Science 10.1016/j.gca.2019.11.020
Shin, Jinhwa; Nehrbass-Ahles, Christoph; Grilli, Roberto; Chowdhry Beeman, Jai; Parrenin, Frédéric; Teste, Grégory; Landais, Amaelle; Schmidely, Loïc; Silva, Lucas; Schmitt, Jochen; Bereiter, Bernhard; Stocker, Thomas F.; Fischer, Hubertus; Chappellaz, Jérôme (2020). Millennial-scale atmospheric CO2 variations during the Marine Isotope Stage 6 period (190–135 ka). Climate of the past, 16(6), pp. 2203-2219. Copernicus Publications 10.5194/cp-16-2203-2020
Bereiter, Bernhard; Tuzson, Béla; Scheidegger, Philipp; Kupferschmid, André; Looser, Herbert; Mächler, Lars; Baggenstos, Daniel; Schmitt, Jochen; Fischer, Hubertus; Emmenegger, Lukas (2020). High-precision laser spectrometer for multiple greenhouse gas analysis in 1 mL air from ice core samples. Atmospheric Measurement Techniques, 13(11), pp. 6391-6406. Copernicus Publications 10.5194/amt-13-6391-2020
Joos, Fortunat; Spahni, Renato; Stocker, Benjamin D.; Lienert, Sebastian; Müller, Jurek; Fischer, Hubertus; Schmitt, Jochen; Prentice, I. Colin; Otto-Bliesner, Bette; Liu, Zeng (2020). N2O changes from the Last Glacial Maximum to the preindustrial - Part 2: Terrestrial N2O emissions and carbon-nitrogen cycle interactions. Biogeosciences, 17(13), pp. 3511-3543. Copernicus Publications 10.5194/bg-17-3511-2020
Hmiel, B.; Petrenko, V. V.; Dyonisius, M. N.; Buizert, C.; Smith, A. M.; Place, P. F.; Harth, C.; Beaudette, R.; Hua, Q.; Yang, B.; Vimont, I.; Michel, S. E.; Severinghaus, J. P.; Etheridge, D.; Bromley, T.; Schmitt, J.; Fain, X.; Weiss, R. F.; Dlugokencky, E. (2020). Preindustrial 14CH4 indicates greater anthropogenic fossil CH4 emissions. Nature, 578(7795), pp. 409-412. Springer Nature 10.1038/s41586-020-1991-8
Gottschalk, Julia; Battaglia, Gianna; Fischer, Hubertus; Frölicher, Thomas; Jaccard, Samuel; Jeltsch-Thömmes, Aurich Tuure Don; Joos, Fortunat; Köhler, Peter; Meissner, Katrin; Nehrbass-Ahles, Christoph; Schmitt, Jochen; Schmittner, Andreas; Skinner, Luke; Stocker, Thomas (2019). Mechanisms of millennial-scale atmospheric CO2 change in numerical model simulations. Quaternary science reviews, 220, pp. 30-74. Elsevier 10.1016/j.quascirev.2019.05.013
Joos, Fortunat; Battaglia, Gianna; Fischer, Hubertus; Jeltsch-Thömmes, Aurich; Schmitt, Jochen (2019). Marine N₂O emissions during a Younger Dryas-like event: the role of meridional overturning, tropical thermocline ventilation, and biological productivity. Environmental Research Letters, 14(7), 075007. IOP Publishing 10.1088/1748-9326/ab2353
Umezawa, Taku; Brenninkmeijer, Carl A. M.; Röckmann, Thomas; van der Veen, Carina; Tyler, Stanley C.; Fujita, Ryo; Morimoto, Shinji; Aoki, Shuji; Sowers, Todd; Schmitt, Jochen; Bock, Michael; Beck, Jonas; Fischer, Hubertus; Michel, Sylvia E.; Vaughn, Bruce H.; Miller, John B.; White, James W. C.; Brailsford, Gordon; Schaefer, Hinrich; Sperlich, Peter; ... (2018). Interlaboratory comparison of δ¹³C and δD measurements of atmospheric CH₄ for combined use of data sets from different laboratories. Atmospheric Measurement Techniques (AMT), 11(2), pp. 1207-1231. Copernicus Publications 10.5194/amt-11-1207-2018
Beck, Jonas; Bock, Michael; Schmitt, Jochen; Seth, Barbara; Blunier, Thomas; Fischer, Hubertus (2018). Bipolar carbon and hydrogen isotope constraints on the Holocene methane budget. Biogeosciences, 15(23), pp. 7155-7175. European Geosciences Union 10.5194/bg-15-7155-2018
Bock, Michael; Schmitt, Jochen; Beck, Jonas; Seth, Barbara; Chappellaz, Jérôme; Fischer, Hubertus (2017). Glacial/interglacial wetland, biomass burning, and geologic methane emissions constrained by dual stable isotopic CH₄ ice core records. Proceedings of the National Academy of Sciences of the United States of America - PNAS, 114(29), E5778-E5786. National Academy of Sciences NAS 10.1073/pnas.1613883114
Köhler, Peter; Nehrbass-Ahles, Christoph; Schmitt, Jochen; Stocker, Thomas F.; Fischer, Hubertus (2017). A 156 kyr smoothed history of the atmospheric greenhouse gases CO₂, CH4, and N₂O and their radiative forcing. Earth System Science Data, 9(1), pp. 363-387. Copernicus Publications 10.5194/essd-9-363-2017
Köhler, Peter; Nehrbass-Ahles, Christoph; Schmitt, Jochen; Stocker, Thomas F.; Fischer, Hubertus (2017). Comment on "Changes in atmospheric CO2 levels recorded by the isotopic signature of n-alkanes from plants" from K.S. Machado and S. Froehner. Global and planetary change, 156, pp. 24-25. Elsevier Science 10.1016/j.gloplacha.2017.08.003
Brovkin, Victor; Brücher, Tim; Kleinen, Thomas; Zaehle, Sönke; Joos, Fortunat; Roth, Raphael; Spahni, Renato; Schmitt, Jochen; Fischer, Hubertus; Leuenberger, Markus; Stone, Emma J.; Ridgwell, Andy; Chappellaz, Jérôme; Kehrwald, Natalie; Barbante, Carlo; Blunier, Thomas; Dahl Jensen, Dorthe (2016). Comparative carbon cycle dynamics of the present and last interglacial. Quaternary Science Reviews, 137, pp. 15-32. Elsevier 10.1016/j.quascirev.2016.01.028
Eggleston, S.; Schmitt, J.; Bereiter, B.; Schneider, R.; Fischer, H. (2016). Evolution of the stable carbon isotope composition of atmospheric CO₂ over the last glacial cycle. Paleoceanography, 31(3), pp. 434-452. American Geophysical Union 10.1002/2015PA002874
Muthers, S.; Kuchar, A.; Stenke, A.; Schmitt, J.; Anet, J. G.; Raible, C. C.; Stocker, T. F. (2016). Stratospheric age of air variations between 1600 and 2100. Geophysical Research Letters, 43(10), pp. 5409-5418. American Geophysical Union 10.1002/2016GL068734
Eicher, O.; Baumgartner, M.; Schilt, A.; Schmitt, J.; Schwander, J.; Stocker, T. F.; Fischer, H. (2016). Climatic and insolation control on the high-resolution total air content in the NGRIP ice core. Climate of the past, 12(6), pp. 1979-1993. Copernicus Publications 10.5194/cpd-11-5509-2015
Bereiter, Bernhard; Eggleston, Sarah Skye; Schmitt, Jochen; Nehrbass-Ahles, Christoph; Stocker, Thomas F.; Fischer, Hubertus; Kipfstuhl, Sepp; Chappellaz, Jerome (2015). Revision of the EPICA Dome C CO 2 record from 800 to 600 kyr before present. Geophysical Research Letters, 42(2), pp. 542-549. American Geophysical Union 10.1002/2014GL061957
Fischer, H.; Schmitt, J.; Eggleston, S.; Schneider, R.; Elsig, J.; Joos, F.; Leuenberger, M.; Stocker, T. F.; Köhler, P.; Chappellaz, J. (2015). Ice core-based isotopic constraints on past carbon cycle changes. Past Global Changes Magazine, 23(1), pp. 12-13. Pages International Project Office
Eggleston, Sarah (2015). Reconstructions of atmospheric CO2 and 13C from Antarctic ice cores over the last glacial cycle (Unpublished). (Dissertation, Universität Bern, Philosophisch–naturwissenschaftliche Fakultät, Physikalisches Institut, Abteilung für Klima– und Umweltphysik)
Schilt, Adrian; Brook, Edward J.; Bauska, Thomas K.; Baggenstos, Daniel; Fischer, Hubertus; Joos, Fortunat; Petrenko, Vasilii V.; Schaefer, Hinrich; Schmitt, Jochen; Severinghaus, Jeffrey P.; Spahni, Renato; Stocker, Thomas F. (2014). Isotopic constraints on marine and terrestrial N2O emissions during the last deglaciation. Nature, 516(7530), pp. 234-237. Macmillan Journals Ltd. 10.1038/nature13971
Bock, Michael; Schmitt, Jochen; Beck, Jonas; Schneider, Robert; Fischer, Hubertus (2014). Improving accuracy and precision of ice core δD(CH<sub>4</sub>) analyses using methane pre-pyrolysis and hydrogen post-pyrolysis trapping and subsequent chromatographic separation. Atmospheric Measurement Techniques (AMT), 7(7), pp. 1999-2012. Copernicus Publications 10.5194/amt-7-1999-2014
Schmitt, J.; Seth, B.; Bock, M.; Fischer, H. (2014). Online technique for isotope and mixing ratios of CH<sub>4</sub>, N<sub>2</sub>O, Xe and mixing ratios of organic trace gases on a single ice core sample. Atmospheric Measurement Techniques (AMT), 7(8), pp. 2645-2665. Copernicus Publications 10.5194/amt-7-2645-2014
WILHELMS, Frank; MILLER, Heinrich; GERASIMOFF, Michael D.; DRÜCKER, Cord; FRENZEL, Andreas; FRITZSCHE, Diedrich; GROBE, Hannes; HANSEN, Steffen Bo; HILMARSSON, Sverrir Æ.; HOFFMANN, Georg; HÖRNBY, Kerstin; JAESCHKE, Andrea; JAKOBSDÓTTIR, Steinunn S.; JUCKSCHAT, Paul; KARSTEN, Achim; KARSTEN, Lorenz; Kaufmann, Patrik R.; KARLIN, Torbjörn; KOHLBERG, Eberhard; KLEFFEL, Guido; ... (2014). The EPICA Dronning Maud Land deep drilling operation. Annals of glaciology, 55(68), pp. 355-366. International Glaciological Society 10.3189/2014AoG68A189
Schneider, Robert; Schmitt, Jochen; Köhler, P.; Joos, Fortunat; Fischer, Hubertus (2013). A reconstruction of atmospheric carbon dioxide and its stable carbon isotopic composition from the penultimate glacial maximum to the last glacial inception. Climate of the past, 9(6), pp. 2507-2523. Copernicus Publications 10.5194/cp-9-2507-2013
Möller, Lars; Sowers, Todd; Bock, Michael; Spahni, Renato; Behrens, Melanie; Schmitt, Jochen; Miller, Heinrich; Fischer, Hubertus (2013). Independent variations of CH₄ emissions and isotopic composition over the past 160,000 years. Nature geoscience, 6(10), pp. 885-890. Nature Publishing Group 10.1038/ngeo1922
Schmitt, Jochen; Seth, Barbara; Bock, Michael; van der Veen, C.; Möller, L.; Sapart, C. J.; Prokopiou, M.; Sowers, T.; Röckmann, T.; Fischer, Hubertus (2013). On the interference of Kr during carbon isotope analysis of methane using continuous-flow combustion–isotope ratio mass spectrometry. Atmospheric Measurement Techniques (AMT), 6(5), pp. 1425-1445. Copernicus Publications 10.5194/amt-6-1425-2013
Baumgartner, M.; Schilt, A.; Eicher, O.; Schmitt, J.; Schwander, J.; Spahni, R.; Fischer, H.; Stocker, T.F. (2012). High-resolution interpolar difference of atmospheric methane around the Last Glacial Maximum. Biogeosciences, 9(10), pp. 3961-3977. Göttingen: Copernicus Publications 10.5194/bg-9-3961-2012
Bock, M.; Möller, L.; Sowers, T.; Schmitt, J.; Fischer, H. (2012). On the contribution of methane isotopes to our understanding of rapid climate changes. Quaternary international, 279-280, pp. 57-58. Elsevier
Bock, M.; Schmitt, J.; Schneider, R.; Fischer, H. (2012). Post pyrolysis trapping of molecular hydrogen improves precision for δD(CH4) analysis. In: EGU General Assembly 2012, held 22-27 April, 2012 in Vienna, Austria (p. 2366). European Geosciences Union
Sperlich, P.; Buizert, C.; Guillevic, M.; Jenk, T.; Sapart, C. J.; Röckmann, T.; Bock, M.; Schmitt, J.; Fischer, H.; Blunier, T. (2012). A setup to analyze isotopes of paleoatmospheric CH4 and N2O in a single ice core sample. In: EGU General Assembly 2012, held 22-27 April, 2012 in Vienna, Austria (p. 6795). European Geosciences Union
van der Veen, C.; Sapart, C. J.; Vigano, I.; Brass, M.; van de Wal, R. S. W.; Bock, Michael; Fischer, Hubertus; Sowers, T.; Buizert, C.; Sperlich, P.; Blunier, Thomas; Behrens, M.; Schmitt, Jochen; Seth, Barbara; Röckmann, T. (2011). Simultaneous stable isotope analysis of methane and nitrous oxide on ice core samples. Atmospheric Measurement Techniques (AMT), 4(12), 2607 -2618. Göttingen: Copernicus Publications 10.5194/amt-4-2607-2011
Schmitt, Jochen; Schneider, Robert; Fischer, Hubertus (2011). A sublimation technique for high-precision measurements of d13CO2 and mixing ratios of CO2 and N2O from air trapped in ice cores. Atmospheric Measurement Techniques (AMT), 4(7), pp. 1445-1461. Göttingen: Copernicus Publications 10.5194/amt-4-1445-2011
Schneider, Robert (2011). Quantifying past changes of the global carbon cycle based on d13CO2 measurements in Antarctic ice cores (Unpublished). (Dissertation, University of Bern, Faculty for Philosophical and Natural Science, Physics Department, Department of Climate and Environmental Physics)
Fischer, Hubertus; Schmitt, Jochen; Lüthi, Dieter; Stocker, Thomas F.; Tschumi, Tobias; Parekh, Payal; Joos, Fortunat; Köhler, Peter; Völker, Christoph; Gersonde, Rainer; Barbante, Carlo; Le Floch, Martine; Raynaud, Dominique; Wolff, Eric (2010). The role of Southern Ocean processes on orbital and millenial CO2 variations - A synthesis. Quaternary Science Reviews, 29(1-2), pp. 193-205. Oxford: Pergamon 10.1016/j.quascirev.2009.06.007
Bock, Michael; Schmitt, Jochen; Möller, Lars; Spahni, Renato; Blunier, Thomas; Fischer, Hubertus (2010). Hydrogen isotopes preclude marine hydrate CH$_4$ emissions at the onset of Dansgaard-Oeschger events. Science, 328(5986), pp. 1686-1689. Washington, D.C.: American Association for the Advancement of Science 10.1126/science.1187651
Bock, Michael; Schmitt, Jochen; Behrens, Melanie; Möller, Lars; Schneider, Robert; Sapart, Celia; Fischer, Hubertus (2010). A gas chromatography/pyrolysis/isotope ratio mass spectrometry system for high-precision δD measurements of atmospheric methane extracted from ice cores. Rapid communications in mass spectrometry, 24(5), pp. 621-633. Chichester: Wiley 10.1002/rcm.4429
Köhler, P.; Fischer, H.; Schmitt, J. (2010). Atmospheric δ13CO2 and its relation to pCO2 and deep ocean δ13C during the late Pleistocene. Paleoceanography, 25(1) Washington, D.C.: American Geophysical Union 10.1029/2008PA001703
Bock, Michael; Schmitt, Jochen; Melanie, Behrens; Möller, Lars; Schneider, Robert; Celia, Sapart; Fischer, Hubertus (2010). A gas chromatography/pyrolysis/isotope ratio mass spectrometry system for high precision δD measurements of atmospheric methane extracted from ice cores. In: EGU General Assembly 2010 (p. 1). European Geosciences Union
Elsig, Joachim; Schmitt, Jochen; Leuenberger, Daiana; Schneider, Robert; Eyer, Marc; Leuenberger, Markus; Joos, Fortunat; Fischer, Hubert; Stocker, Thomas F. (2009). Stable isotope constraints on Holocene carbon cycle changes from an Antarctic ice core. Nature, 461(7263), pp. 507-510. London: Macmillan Journals Ltd. 10.1038/nature08393
Schneider, Robert; Schmitt, Jochen; Fischer, Hubertus (2009). On the way to understand past atmospheric CO$_2$ fluctuations using d13CO2 measured on ice cores. In: European Geosciences Union. European Geosciences Union
Schneider, Robert; Schmitt, Jochen; Fischer, Hubertus (2009). Comparing past interglacials to understand atmospheric CO$_2$ and carbon cycle dynamics using ice core d13CO2 data. In: EGU General Assembly 2009, Vienna, Austria, 19-24 April 2009. European Geosciences Union
Kaufmann, Patrik R.; Federer, Urs; Hutterli, Manuel A.; Bigler, Matthias; Schüpbach, Simon; Urs, Ruth; Schmitt, Jochen; Stocker, Thomas F. (2008). An improved continuous flow analysis system for high-resolution field measurements on ice cores. Environmental science & technology, 42(21), pp. 8044-8050. Washington, D.C.: ACS Publications 10.1021/es8007722
Fischer, Hubertus; Behrens, Melanie; Bock, Michael; Richter, Ulrike; Schmitt, Jochen; Loulergue, Laetitia; Chappellaz, Jerome; Spahni, Renato; Blunier, Thomas; Leuenberger, Markus; Stocker, Thomas F. (2008). Changing boreal methane sources and constant biomass burning during the last termination. Nature, 452(7189), pp. 864-867. London: Macmillan Journals Ltd. 10.1038/nature06825
