Project Ruby

Project Ruby promotes experiments that include simulations over long time-scales (10 000 years) as well as century-long integrations with very large (100 members) ensembles, and predictions for the coming decades. Ruby will use ICON-ESM configurations that run as efficient as possible and allow the combination of resolution, ensemble size, and simulation length that best fit the scientific objectives. For these purposes the first goal is a model that scales well enough to enable a throughput of 100 years/day at a resolution that represents the large-scale dynamics of the atmosphere and the ocean in a high quality. The scientific and technical effort will focus on performance optimization and on streamlining the representation of aspects of the system that are not crucial to the study at hand. The first milestone of project Ruby is the creation of a series of experiments that includes simulations of the 20th century and idealized climate change scenarios.