Key Research Interests and Expertise


  • Policy relevant science related to climate change and sustainability
  • Integrated assessment modelling of climate change, climate change mitigation and adaptation, and sustainability in the context of the goals of the Paris Agreement to limit global warming to well below 2C above pre-industrial levels


  • Linkages between land use change policy and climate change policy; exploring the land-water-energy nexus in relation to climate change, agriculture and ecosystem conservation


  • Quantification of the benefits of climate policy and climate change mitigation, in particular the avoided climate change impacts 


  • Climate change impacts on ecosystems and species, and hence ecosystem services and the economy


  • Robustness of integrated assessment results to uncertainties within and between models


  • Making policy relevant science available and useful to policy makers, stakeholders and the academic community.

Significant publications

  • Warren, R., VanDerWal, J., Price, J., Welbergen, J.A, Atkinson, I., Ramirez-Villegas, J., Osborn, T.J., Jarvis, A., Shoo, L.P., Williams, S.E., Lowe, J. 2013. Quantifying the benefit of early mitigation in avoiding biodiversity loss. Nature Climate Change 3: 678-682 DOI:10.1038/NCLIMATE1887
  • Warren, R., Lowe, J., Arnell, N.W., Hope, C. et al. 2013. The AVOID programme’s new simulations of global benefits of stringent climate change mitigation. Climatic Change DOI: 10.1007/s10584-013-0814-4
  • Arnell, N.W., Lowe, J.A., Brown, S., Gosling, S.N., Gottschalk, P., Hinkel, J., Lloyd-Hughes, B., Nicholls, R.J., Osborn, T.J., Osborne, T.M., Rose, G.A., Smith, P. & Warren R.F. 2013. A global assessment of the effects of climate policy on the impacts of climate change. Nature Climate Change DOI:10.1038/nclimate1793
  • Warren, R., Yu, R., Osborn, T. 2012. European Drought Regimes under mitigated and unmitigated climate change. Climate Research 51: 105–123, 2012 DOI: 10.3354/cr01042
  • Warren, R. 2010. The role of interactions in a world implementing adaptation and mitigation solutions to climate change. Phil. Trans. Roy. Soc. A. In press.
  • Warren, R., Mastrandrea, M., Hope, C., and Hof, A. 2010. Variation in the climatic response of integrated models. Climatic Change. DOI 10.1007/s10584-009-9769-x. 
  • Warren, R., Price, J., de la Nava Santos, S., Fischlin, A, and Midgley, G., 2010. Increasing impacts of climate change upon ecosystems with increasing global mean temperature rise. Climatic ChangeDOI 10.1007/s10584-010-9923-5.
  • Warren R, Yu R, Osborn T  European Drought Regimes under mitigated and unmitigated climate change.  In review Climate Research  
  • Warren, R., de la Nava Santos, S., Arnell, N.W., Bane, M., Barker, T., Barton, C., Ford, R., Füssel, H-M., Hankin, R.K.S., Klein, R., Linstead, C., Kohler, J., Mitchell, T.D., Osborn, T.J., Pan, H., Raper, S.C.B., Riley, G., Schellnhüber, H.J.,Winne, S., and D. Anderson (2008) Development and illustrative outputs of the Community Integrated Assessment System (CIAS), a multi-institutional modular integrated assessment approach for modelling climate change. Environmental Modelling & Software 23, 592-610. DOI: 10.1016/j.envsoft.2007.09.002
  • Warren, R. (2006). ‘Impacts of Global Climate Change at Different Annual Mean Global Temperature Increases’, in Schellnhuber, H.J., Cramer, W., Nakicenovich, N., Wigley, T., and Yohe, G. (Eds) Avoiding Dangerous Climate Change, Cambridge University Press. 
  • Warren, R. and ApSimon, H.M., (2000) ‘Selection of Target Loads for Acidification in Emission Abatement Policy: the use of Gap Closure Approaches’, Water, Air and Soil Pollution 121, 229-258.
  • Warren, R. and ApSimon, H.M., (2000) ‘The Abatement Strategies Assessment Model, ASAM: Robustness Studies, Illustrative Results, and Investigation of the Role of European Countries in Sulphur Dioxide Emission Reduction Schemes’, Journal of Environmental Management, 59, 3-20.
  • Ravishankara, A.R., Solomon, S., Turnipseed, A.A., and Warren, R. (1993) ‘Atmospheric Lifetimes of Long-lived Halogenated Species’, Science, Vol. 259, pp. 194-99. [Winner of the Outstanding Scientific Paper Award NOAA/US Dept of Commerce].
  • Fisher, B., Nakicenovich, N, Alfsen, K. et al., and Warren, R. (2007) (Lead Author). ‘Issues Related to Mitigation in the Long-term Context’, In: Metz B, et al. (eds) Climate Change 2007: Mitigation of Climate Change.  Cambridge University Press, Cambridge, UK, pp. 169-250.
  • Fischlin, A., Midgely, G., Price, J. et al., and Warren, R. (2007) (Contributing Author) ‘Ecosystems, their properties, goods and services’, In: Parry ML, Canziani OF, Palutikof JP, van der Linden PJ, Hanson CE (eds) Climate Change 2007: Impacts, Adaptation and Vulnerability. Cambridge University Press, Cambridge, pp. 211-272.
  • Barker, T., Pan, H., Kohler, J., Warren, R. and Winne, S., (2006). Decarbonizing the global economy with induced technological change: Scenarios to 2100 using E3MG.  Energy Journal, Special Issue, pp 241-258.

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