Presentation Information
[U02-06]Multiscale Models for Marginal Ice Zone Dynamics★Invited Papers
*Kenneth M Golden1 (1.University of Utah)
Keywords:
sea ice,marginal ice zone,mushy layers,homogenization,uncertainty quantification,multiscale analysis
Perhaps the most dynamic component of the Arctic sea ice cover is the marginal ice zone (MIZ), the transitional region between dense pack ice and open ocean. It widens severalfold and moves poleward in a dramatic annual cycle, significantly impacting the polar marine environment, ecological processes, and human accessibility to the Arctic. Moreover, the boundary of the MIZ exhibits fractal geometry with a pronounced seasonal cycle. We’ll discuss multiscale partial differential equation models and predictions for MIZ dynamics and the sea ice concentration field. The MIZ can be viewed as a liquid-solid phase transition region, or mushy layer, to obtain a model that captures the seasonal cycle. Parameters in the model depend on finer scale structure and are computed using rigorous homogenization techniques which yield novel approaches to quantifying uncertainty in the system. We’ll also consider a related floe-scale model to study ice transport processes, jamming transitions, and anomalous diffusion observed in GPS data, as well as physics-informed machine learning from satellite data for models of the sea ice concentration field.