Projecting Climate Risk to Energy, Water and Land Resources Objective: Improve MIT Earth System Model (MESM) to provide fast, low-cost, actionable projections of climate change and climate risk to energy, water and land resources. Findings: The computational efficiency of this model allows researchers to run large ensembles of simulations for robust uncertainty quantification within a short time frame—and generate comparable results to those produced by more computationally intensive models. Impact: The MESM provides an effective tool for modeling the climate system, quantifying uncertainty and analyzing climate risk to global and regional energy, water and land resources. The MESM belongs to the class of Earth system models of intermediate complexity, which occupy a place between simple conceptual models and comprehensive global circulation models. (Source: MIT Joint Program on the Science and Policy of Global Change) Sokolov, A., D. Kicklighter, C.A. Schlosser, C. Wang, E. Monier, B. Brown-Steiner, R. Prinn, C. Forest, X. Gao, A. Libardoni and S. Eastham (2018): Description and Evaluation of the MIT Earth System Model (MESM). AGU Journal of Advances in Modeling Earth Systems (doi: 10.1029/2018MS001277)