A scalable parallel algorithm for atmospheric general circulation models on a multi-core cluster

TL;DR: A hybrid parallel algorithm of the message passing interface and CUDA for CFD applications on multi-GPU HPC clusters is proposed and the one-dimensional domain decomposition method is used to balance the workload among GPUs.

TL;DR: This paper demonstrates an approach that runs a large-scale, computationally intensive, longwave radiative transfer model on a GPU cluster and demonstrates that the multi-GPU acceleration algorithm is valid, scalable, and highly efficient when compared to a single GPU or CPU.

TL;DR: In this article, a nine-level grid-point global atmospheric general circulation model was developed by the modeling group from Institute of Atmospheric Physics as one task of the CO2-Climate cooperation project between Chinese Academy of Sciences and United States Department of Energy.

TL;DR: An optimization algorithm for the massive data communication between the Weather Research and Forecasting model and Coupler version 7 in the Chinese Academy of Sciences-Earth System Model (CAS-ESM) is proposed and a generic performance evaluation method for ESMs from perspectives of optimal load balance and efficiency is proposed.

TL;DR: It is shown that such an approach can yield an implementation of the discrete Fourier transform that is competitive with hand-optimized libraries, and the software structure that makes the current FFTW3 version flexible and adaptive is described.

TL;DR: The 12-layer UCLA general circulation model encompassing troposphere and stratosphere (and superjacent 'sponge layer') is described and selection of space finite-difference schemes for homogeneous incompressible flow, with/without a free surface, nonlinear two-dimensional nondivergent flow, enstrophy conserving schemes, momentum advection schemes, vertical and horizontal difference schemes, and time differencing schemes are discussed.

TL;DR: The GEOS-5 AGCM presented in this paper is the model used as part of the GMAO MERRA2 reanalysis, global mesoscale simulations at 10 km resolution through 1.5 km resolution, the real-time numerical weather prediction system, and for atmosphere only, coupled ocean-atmosphere and coupled atmospherechemistry simulations.