Publication: Description and validation of the ice-sheet model Yelmo (version 1.0)
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2020-06-24
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Copernicus Gesellschaft MBH
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Abstract
We describe the physics and features of the icesheet model Yelmo, an open-source project intended for collaborative development. Yelmo is a thermomechanical model, solving for the coupled velocity and temperature solutions of an ice sheet simultaneously. The ice dynamics are currently treated via a “hybrid” approach combining the shallow-ice and shallow-shelf/shelfy-stream approximations, which makes Yelmo an apt choice for studying a wide variety of problems. Yelmo’s main innovations lie in its flexible and user-friendly infrastructure, which promotes portability and facilitates long-term development. In particular, all physics subroutines have been designed to be self-contained, so that they can be easily ported from Yelmo to other models, or easily replaced by improved or alternate methods in the future. Furthermore, hard-coded model choices are eschewed, replaced instead with convenient parameter options that allow the model to be adapted easily to different contexts. We show results for different ice-sheet benchmark tests, and we illustrate Yelmo’s performance for the Antarctic ice sheet.
Description
© Author(s) 2020. We would like to thank Mahé Perrette, Christophe Dumas, Gunter Leguy and Bill Lipscomb for valuable discussions about model design that improved Yelmo, Akira Nishida for help with Lis, and Ilaria Tabone and Javier Blasco for extensive model testing at intermediate development points. We are also grateful to the reviewers for helpful comments. This research has been supported by the Spanish Ministry of Science and Innovation project RIMA (grant no. CGL2017-85975-R). Alexander Robinson was funded by the Ramón y Cajal Programme of the Spanish Ministry for Science, Innovation and Universities (grant no. RYC-2016-20587). Heiko Goelzer has received funding from the program of the Netherlands Earth System Science Centre (NESSC), financially supported by the Dutch Ministry of Education, Culture and Science (OCW) (grant no. 024.002.001). Ralf Greve was supported by the Japan Society for the Promotion of Science (JSPS) KAKENHI (grant nos. JP16H02224, JP17H06104 and JP17H06323), by the Japanese Ministry of Education, Culture, Sports, Science and Technology (MEXT) through the Arctic Challenge for Sustainability (ArCS) project, and through the Arctic Challenge for Sustainability (ArCS) project (program grant no. JPMXD1300000000).