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Staff information


Leon Clarke

Joint Global Change Research Institute
Engineer, TL


Dr. Clarke is an expert in the cross-disciplinary analysis of issues relating to energy, technology, policy, and climate change. Dr. Clarke is currently a Senior Scientist and leads the Integrated Modeling and Energy Group at the Joint Global Change Research Institute (JGCRI), a collaboration between the University of Maryland and the Pacific Northwest National Laboratory (PNNL). Dr. Clarke's current activities focus on the evolution of national and international energy and agricultural systems, energy technology deployment and technological advance, scenario analysis, international climate policy, and integrated assessment of climate impacts. Dr. Clarke has served in a range of national and international leadership roles, including coordinating lead author for the Intergovernmental Panel on Climate Change (IPCC), member of the National Academy Study on America's Climate Choices, and coordinator of several multi institutions studies exploring energy, technology, policy, and climate change. Prior to joining PNNL, Dr. Clarke worked as a decision scientist at Lawrence Livermore National Laboratory, evaluated utility demand-side management programs at Pacific Gas & Electric Company, and conducted a range of market assessments and demand side management program evaluations at RCG/Hagler, Bailly, Inc. Dr. Clarke holds Ph.D. and M.S. degrees in Engineering Economic Systems and Operations Research from Stanford University and B.S. and M.S. degrees in Mechanical Engineering from U.C. Berkeley.

Research Interests

  • Integrated assessment research
  • Technology development deployment strategy
  • Scenario analysis
  • National and international climate and energy policy
  • Climate impacts

Education and Credentials

  • Ph.D., Engineering-Economic Systems and Operations Research, Stanford University
  • M.S., Engineering-Economic Systems and Operations Research, Stanford University
  • M.S., Mechanical Engineering, University of California at Berkeley
  • B.S., Mechanical Engineering, University of California at Berkeley

PNNL Publications


  • Iyer GC, N Hultman, J Eom, HC McJeon, PL Patel, and LE Clarke. 2015. "Diffusion of low-carbon technologies and the feasibility of long-term climate targets." Technological Forecasting and Social Change 90(Part A):103-118.  doi:10.1016/j.techfore.2013.08.025
  • Yin X, W Chen, J Eom, LE Clarke, SH Kim, PL Patel, S Yu, and GP Kyle. 2015. "China's transportation energy consumption and CO2 emissions from a global perspective." Energy Policy 82:233-248.  doi:10.1016/j.enpol.2015.03.021


  • Chaturvedi V, J Eom, LE Clarke, and PR Shukla. 2014. "Long term building energy demand for India: Disaggregating end use energy services in an integrated assessment modeling framework." Energy Policy (64):226-242.  doi:10.1016/j.enpol.2012.11.021
  • Clarke LE, A Fawcett, J Weyant, J McFarland, V Chaturvedi, and Y Zhou. 2014. "Technology and U.S. Emissions Reductions Goals: Results of the EMF 24 Modeling Exercise." The Energy Journal 35(Special Issue):Article No. 2.  doi:10.5547/01956574.35.SI1.2
  • Krey V, G Luderer, LE Clarke, and E Kriegler. 2014. "Getting from here to there - energy technology transformation pathways in the EMF-27 scenarios." Climatic Change 123(3-4):369-382.  doi:10.1007/s10584-013-0947-5


  • Chaturvedi V, SH Kim, SJ Smith, LE Clarke, Y Zhou, GP Kyle, and PL Patel. 2013. "Model Evaluation and Hindcasting: An Experiment with an Integrated Assessment Model." Energy 61:479-490.  doi:10.1016/
  • Zhou Y, J Eom, and LE Clarke. 2013. "The effect of climate change, population distribution, and climate mitigation on building energy use in the U.S. and China." Climatic Change 119(3-4):979-992.  doi:10.1007/s10584-013-0772-x


  • Calvin KV, LE Clarke, V Krey, GJ Blanford, K Jiang, M Kainuma, E Kriegler, G Luderer, and PR Shukla. 2012. "The Role of Asia in Mitigating Climate Change: Results from the Asia Modeling Exercise." Energy Economics 34(Supplement 3):S251-S260.  doi:10.1016/j.eneco.2012.09.003
  • Chaturvedi V, S Waldhoff, LE Clarke, and S Fujimori. 2012. "What are the Starting Points? Evaluating Base-Year Assumptions in the Asian Modeling Exercise." Energy Economics 34(Supplement 3):S261-S271.  doi:10.1016/j.eneco.2012.05.004
  • Clarke LE, V Krey, J Weyant, and V Chaturvedi. 2012. "Regional energy system variations in global models: Results from the Asian Modeling Exercise." Energy Economics 34(Supplement 3):S293-S305.  doi:10.1016/j.eneco.2012.07.018
  • Eom J, LE Clarke, SH Kim, GP Kyle, and PL Patel. 2012. China's Building Energy Use: A Long-Term Perspective based on a Detailed AssessmentPNNL-21073, Pacific Northwest National Laboratory, Richland, WA. 
  • Eom J, LE Clarke, SH Kim, GP Kyle, and PL Patel. 2012. "China's Building Energy Demand: Long-Term Implications from a Detailed Assessment." Energy 46(1):405-419.  doi:10.1016/
  • Zhou Y, P Luckow, SJ Smith, and LE Clarke. 2012. "Evaluation of Global Onshore Wind Energy Potential and Generation Costs." Environmental Science & Technology 46(14):7857-7864.  doi:10.1021/es204706m







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