Peter Lauritzen

	Peter Lauritzen

Peter Lauritzen (CGD/SCD), started his postdoc by co-authoring a review chapter on "Finite-Volume Methods in Meteorology" for a handbook on numerical methods used in the atmosphere and oceans (co-editor is Dr. J. Tribbia, NCAR). This motivated a detailed stability analysis of finite-volume advection schemes permitting long time steps which manuscript has been submitted for publication. Peter is currently working on a conservative remapping package for CCSM, that is, an algorithm for mapping variables conservatively between different grids used in CCSM. Currently there exists no higher-order method for remapping conservatively between spherical grids. The algorithm is based on the cascade interpolation method that splits the two-dimensional integral into two one-dimensional problems. This allows for the efficient application of higher-order remapping methods. To accommodate different spherical grids the cubed sphere grid is used for the remapping since it provides a 'Cartesian-like' representation of the problem.  Simultaneously Peter is collaborating with SCD in order to contribute to the development of a new dynamical core based on the Discontinuous Galerkin method (HOMME project).

Funding Sources

This research is supported by the National Science Foundation.