%0 Online Multimedia
%A Shaw, James
%D 2016
%T Atmospheric transport over terrain
%U https://figshare.com/articles/presentation/Atmospheric_transport_over_terrain/4307957
%R 10.6084/m9.figshare.4307957.v1
%2 https://ndownloader.figshare.com/files/7025246
%K terrain
%K transport
%K meshing
%K advection
%K orography
%K cut cells
%K Meteorology
%X
Almost all operational weather forecast models represent terrain using terrain-following meshes that become highly-distorted over steep slopes. An alternative is the cut cell method but, while cut cell meshes are less distorted compared to terrain-following meshes, arbitrarily small cut cells are created that constraint the time-step for explicit numerical methods.
This motivates a new type of mesh that avoids arbitrarily small cells and most mesh distortions. Combined with a new transport scheme that is formulated for stability and accuracy over steep slopes on arbitrarily-structured meshes, we alleviate numerical instabilities and inaccuracies associated with traditional transport schemes.
Presented at the Royal Meteorological Society South East meeting at the University of Reading, 7th December 2016.
%I figshare