Jacques Middlecoff authored and/or contributed to the following articles/publications.
A single software framework is introduced to evaluate numerical accuracy of the A-grid (NICAM) versus C-grid (MPAS) shallow-water model solvers on icosahedral grids. The C-grid staggering scheme excels in numerical noise control and total energy conservation, which results in exceptional stability for long time integration. Its weakness lies in ...
NOAA's Earth System Research Laboratory (ESRL) has been working on the parallelization of the FV3 dynamical core toward fine-grain GPU and MIC processors. Initial work focused on modifying the code to expose more loop level parallelism needed to run efficiently on GPU processors containing over 3000 processing cores. Code changes have been quite...Institution National Oceanic and Atmospheric Administration - NOAA
The design and performance of the Non-Hydrostatic Icosahedral Model (NIM) global weather prediction model is described. NIM is a dynamical core designed to run on central processing unit (CPU), graphics processing unit (GPU), and Many Integrated Core (MIC) processors. It demonstrates efficient parallel performance and scalability to tens of thou...Institutions Earth System Research Laboratory - ESRL National Oceanic and Atmospheric Administration - NOAA
The newly developed Ionosphere-Plasmasphere (IP) model has revealed neutral winds as a primary source of the “third-peak” density structure in the daytime global ionosphere that has been observed by the low-latitude ionospheric sensor network GPS total electron content measurements over South America. This third peak is located near ?30° magneti...
A hydrostatic global weather prediction model based on an icosahedral horizontal grid and a hybrid terrain-following/isentropic vertical coordinate is described. The model is an extension to three spatial dimensions of a previously developed, icosahedral, shallow-water model featuring user-selectable horizontal resolution and employing indirect ...Institutions Earth System Research Laboratory - ESRL National Oceanic and Atmospheric Administration - NOAA
Different methods of solving shallow water models on icosahedral grids were compared. Specifically, researchers examined the differences in accuracy from using unstaggered variables (A-grid, with mass and velocity at cell centers) compared to staggered variables (C-grid, with mass and velocity on cell edges). It was found that C-grid performs be...Institution National Oceanic and Atmospheric Administration - NOAA