High-order property-preserving semi-Lagrangian tracer transport in E3SM.
Andrew Bradley · 2020
Computational efficiency: Solution accuracy for given computational resources. Two new methods increase E3SM Atmosphere Model (EAM) computational efficiency:Semi-Lagrangian tracer transport (this talk).Separate physics parameterizations grid with physics-dynamics-grid remap.Property preserving, to mimic continuum equations: Conserve mass.Limit extrema.Tracer consistent.High order: Order of accuracy (OOA) is at least 2.In general, strict property preservation limits formal OOA to 2-3.Together, speed up EAM by roughly 2× roughly independent of architecture and problem configuration.Work seamlessly in the Regionally Refined Mesh (RRM) configuration.