U.S. Department of Energy

Pacific Northwest National Laboratory

Regional Integrated Assessment

To support regional-scale system integration across PRIMA, a sub-regional version of GCAM has been developed, called GCAM-USA. GCAM-USA retains the global capabilities of GCAM for regions outside of the United States but includes increased domestic resolution, including:

  • Climate-dependent building energy demand at the state level
  • Electricity generation at the state level
  • Crop yields and land use change at the agro-ecological zone scale
  • Water supply and demand at the major watershed scale.

POC: Leon Clarke


Zhou Y, L Clarke, J Eom, P Kyle, P Patel, SH Kim, J Dirks, E Jensen, Y Liu, J Rice, L Schmidt, and T Seiple. 2014. “Modeling the effect of climate change on U.S. state-level buildings energy demands in an integrated assessment framework.” Applied Energy 113:1077-1088. DOI: 10.1016/j.apenergy.2013.08.034.

The Global Change Assessment Model, or GCAM, is a state-of-the-art integrated assessment model that has been developed at PNNL for more than 25 years and now serves as a community model. GCAM is a global partial equilibrium model that simulates the interactions among the economy, the global energy system, and agriculture and land use in 14 worldwide regions under various demographic and technological assumptions.

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