Terminology

CSLAM

A semi-Lagrangian, finite volume advection scheme known as the Conservative Semi-Lagrangian Multitracer (CSLAM; Lauritzen et al., 2017 1 ).

Note that when implemented in WACCM, CSLAM is four times faster than the CAM-SE (Lauritzen, 2019 2 ).

If CSLAM is used for advection, it uses a finite volume method (FVM) grid and the results are then coupled to the cube-sphere grid.

In the SE dynamical core, the grid is known as the GLL grid because its columns are located at the Gauss-Lobatto-Legendre quadrature points.

1: Lauritzen, P. H., M. A. Taylor, J. Overfelt, P. A. Ullrich, R. D. Nair, S. Goldhaber, and R. Kelly, 2017: CAM-SE–CSLAM: Consistent Coupling of a Conservative Semi-Lagrangian Finite-Volume Method with Spectral Element Dynamics. Monthly Weather Review, 145, 833–855, https://doi.org/10.1175/MWR-D-16-0258.1.
2: Lauritzen, P. H., 2019: Dynamical cores across scales in CESM. 2019 CESM Workshop. https://www.cesm.ucar.edu/events/workshops/ws.2019/presentations/cross/lauritzen.pdf