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Integrated Assessment Models (IAMs) have become critical tools for assessing the costs and benefits of policies to reduce greenhouse gas emissions. Three models currently inform the social cost of carbon dioxide (SCCO2, the net present value of damages from one additional ton of CO2) used by the US federal government, several states, and Canada. Here we present a new open-source implementation of one of these models (PAGE09) in the Julia programming language using a modular modeling framework (Mimi). Mimi-PAGE was coded using best coding practices (such as multiple code reviews by different individuals during development, automated testing of newly-committed code, and provision of documentation and usage notes) and is publicly available in a GitHub repository for community inspection and use under an open source license. In this paper we describe the Julia implementation of PAGE09, show that output from Mimi-PAGE matches that of the original model, and perform comparisons of the run time between the two implementations.

Aluminum production is among the most energy-intensive industries and accounts for one percent of total global carbon dioxide (CO2) emissions. The ongoing increase in world aluminum demand means that this industry’s energy use and CO2 emissions will continue to grow. There is significant incentive to develop, commercialize and adopt emerging energy efficiency and CO2 emissions-reduction technologies for aluminium production. Although studies from around the world have identified a wide range of energy efficiency technologies applicable to the aluminum industry that have already been commercialized, information is limited and/or scattered regarding emerging or advanced energy efficiency and low-carbon technologies that are not yet commercialized. This report consolidates available information on 10 emerging aluminum industry technologies, with the intent of providing a well-structured database of information on these technologies for engineers, researchers, investors, aluminum companies, policy makers, university students, and other interested parties. For each technology included, we provide information on energy savings and environmental and other benefits, costs, and commercialization status; we also identify references for more information.