Edited sentence: In the late 2000s, the growing global interest in climate change refocused attention on the role of common modeling infrastructure in solving complex problems.Some of the specific factors that new common modeling infrastructure projects seek to address include:.increased demand for access to climate model output and related information following the widespread dissemination of the conclusions of the IPCC Fourth Assessment Report in 2007.the desire to model anticipated climate change impacts, often by linking together a variety of local, regional, and global models and datasets.the exploration of weather modeling techniques and observational datasets to improve and validate climate model predictions