ScientistResearch Department, Research Integrated Forecast Systems Section, System Design Grouppage tabs Profile Summary: I joined ECMWF as a Scientist in the Research Department. I work on the OpenIFS Project in the System Design Team in the Integrated Forecast Systems (IFS) Section. My role includes the further development of the OpenIFS model and collaboration with scientists within ECMWF and with model users at other institutions. Professional interests: Atmospheric chemistry and transport processes Chemistry-climate interactions Changes in the tropospheric oxidizing capacity Upper troposphere and lower stratosphere processes Climate impacts of the aviation transport sector Career background: Education: Ph.D. in Atmospheric Chemistry Modelling (2004)Centre for Atmospheric Science, Department of Chemistry, University of Cambridge, United Kingdom Diplom (equivalent to M.Sc.) in Meteorology (1999)Institut für Meteorologie und Klimaforschung, Universität Karlsruhe (now Karlsruhe Institute for Technology), Germany Visiting Student (1996)Department of Geography, University of the Witwatersrand, Johannesburg, South Africa Professional experience: Scientist, ECMWF, Reading, UK (since 2018) Senior Research Associate, University of East Anglia, Norwich, UK (2017-2018) Centre for Ocean and Atmospheric Sciences, School of Environmental Sciences Research Associate, University of Cambridge, UK (2015-2017) Centre for Atmospheric Science, Department of Chemistry Visiting Researcher, British Antarctic Survey, Cambridge, UK (2015) Research Fellow, University of Birmingham, UK (2013-2015) School of Geography, Earth and Environmental Sciences Lecturer in Climate-Environment Interactions, King's College London, UK (2008-2013) Department of Geography Research Associate, University of Cambridge, UK (2003-2008) Institute for Aviation and the Environment, Department of Chemistry External recognitions: Fellow of the Royal Meteorological Society (RMetS)Fellow of the Higher Education Academy (HEA) Publications 2014Dessens Olivier, Köhler Marcus O., Rogers Helen L., Jones Rod L., Pyle John A. (2014) Aviation and climate change, Transport Policy. DOI: 10.1016/j.tranpol.2014.02.014 2013Köhler M. O. (2013) Latitudinal variation of the effect of aviation NOx emissions on atmospheric ozone and methane and related climate metrics n. 1, pp. 1-9. DOI: 10.1016/j.atmosenv.2012.09.013 Krammer Philip (2013) Climate-neutrality versus Carbon-neutrality for Aviation Biofuel Policy, pp. 64-72. DOI: 10.1016/j.trd.2013.03.013 2010Köhler Marcus O. (2010) Chemistry of the Atmosphere and Impacts from Global Aviation, pp. 3629-3640. DOI: 10.1002/9780470686652 2008Köhler M. O. (2008) Impact of perturbations to nitrogen oxide emissions from global aviation. DOI: 10.1029/2007JD009140 2007Reynolds T. G. (2007) Modelling Environmental & Economic Impacts of Aviation: Introducing the Aviation Integrated Modelling Project n. AIAA-2007-7751. DOI: 10.2514/6.2007-7751 Köhler M. O. (2007) Response in ozone and methane to small emission changes and dependence on cruise altitude, pp. 147–153. 2006Stordal F. (2006) TRADEOFFs in climate effects through aircraft routing: forcing due to radiatively active gases n. 5, pp. 10733-10771. DOI: 10.5194/acpd-6-10733-2006 2005Brunner D. (2005) An evaluation of the performance of chemistry transport models - Part 2: Detailed comparison with two selected campaigns n. 1, pp. 107-129. DOI: 10.5194/acp-5-107-2005 Sausen R. (2005) Aviation radiative forcing in 2000: An update on IPCC (1999) n. 4, pp. 555-561. DOI: 10.1127/0941-2948/2005/0049 2004Esler J. G. (2004) A quantitative analysis of grid-related systematic errors in oxidising capacity and ozone production rates in chemistry transport models n. 7, pp. 1781-1795. DOI: 10.5194/acp-4-1781-2004 2003Brunner D. (2003) An evaluation of the performance of chemistry transport models by comparison with research aircraft observations. Part 1: Concepts and overall model performance n. 5, pp. 1609-1631. DOI: 10.5194/acp-3-1609-2003 Köhler M. O. (2003) Modelling the Global Impact of Nitrogen Oxides from Subsonic Aircraft Emissions on Ozone. Köhler M. O. (2003) Modelling the Impact of Subsonic Aircraft Emissions on Ozone: Future Changes and the Impact of Cruise Altitude Perturbations, pp. 173-177. 1996Joubert A. M. (1996) Projected temperature increases over southern Africa due to increasing levels of greenhouse gases and sulphate aerosols n. 11–12, pp. 524-526.