id,summary,reporter,owner,description,type,status,priority,milestone,component,version,severity,resolution,keywords,cc,branch_review,mp_status,wp_comment
2479,Inconsistent time scale in aEVP rheology,jchanut,systeam,"The adaptive rheology solver (ln_aEVP=T) is based on the modified EVP solver of Bouillon et al (2013) in which time stepping of rheology is replaced by an iterative process. In that context the time scale involved in the equations is the ""slow"" ice time step, ""rdt_ice"", in contrary to the standard EVP method which considers the substep ""rdt_ice/nn_nevp"".
NEMO makes no disctinction so that the time stepping, varying alpha/beta coefficients are all wrong. Replacing ""zdtevp"" by ""rdt_ice"" at the beginning of the rheology subroutine (""ice_dyn_rhg_evp"") solves the problem.
There are potentially other, but minor, inconsistencies related to aEVP such that the missing spatial interpolation of alpha/beta at velocity points.
",Bug,closed,high,,SI3,4.0-HEAD,major,fixed,,,failed,no,Unspecified