Fixing EVP — Solving the Momentum Equations of Dynamic Sea Ice Models


Contact
Martin.Losch [ at ] awi.de

Abstract

Most dynamic sea ice models for climate type simulations are based on the viscous-plastic (VP) rheology. The most common methods of solving the momentum equations with VP-rheologies and elliptic yields curves include implicit methods with different flavors of Picard (or fixed point iterative) solvers, Newton methods, and different variants of the explicit Elastic-Viscous-Plastic (EVP) solver. The EVP solver, in particular, is now used in many Earth system models and forced ice-ocean models, because it is easier to implement than implicit methods and generally cheaper on massively parallel computer. In its original form, however, it leads to noisy solutions that do not converge to the solution of the momentum equations. Simple and easy to implement modifications recover the full momentum equations. The improved EVP-solutions correspond to those obtained with implicit methods, still at comparatively low cost. At very high resolution, the effect of the correction is particularly striking.



Item Type
Conference (Invited talk)
Authors
Divisions
Primary Division
Programs
Primary Topic
Peer revision
Not peer-reviewed
Publication Status
Published
Event Details
Institute Seminar, Canadian Meteorological Centre, Environment and Climate Change Canada.
Eprint ID
48415
Cite as
Losch, M. (2018): Fixing EVP — Solving the Momentum Equations of Dynamic Sea Ice Models , Institute Seminar, Canadian Meteorological Centre, Environment and Climate Change Canada .


Share

Research Platforms
N/A

Campaigns


Actions
Edit Item Edit Item