Download High Performance Computing in the Geosciences by Bernardo Rodriguez, Leslie Hart (auth.), François-Xavier Le PDF

By Bernardo Rodriguez, Leslie Hart (auth.), François-Xavier Le Dimet (eds.)

High functionality Computing within the Geosciences surveys the cutting-edge of courses shortly being built which require excessive functionality computing for his or her implementation, offers a advisor for selection making in regard to computing instructions in destiny numerical versions, and offers an summary of destiny advancements in vastly parallel processing and their implications for numerical modelling within the geosciences.

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Extra info for High Performance Computing in the Geosciences

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VARIABLE RESOLUTION FORECAST It was found that it is possible to almost exactly reproduce a 2-day forecast on a 80· of longitude x 6()" of latitude area using a variable-resolution mesh, at one seventh the cost of running the model with uniformly-high (OS) resolution everywhere. Both models had a resolution of OS on the sub-domain (covering North America). Figure 3 shows the RMS height differences between a model run using the uniform high-reSOlution, and one with the same high-resolution, but only on the region of interest.

1. PRESENT DAY FORECAST MODELS AT CMC For the past seven years, the Canadian Meteorological Center (CMC) has had two operating forecast models: a global model to produce long term forecasts, and a regional model, to produce quickly regional forecasts. The characteristics of the two models are the following: The global model uses a spectral representation in the horizontal with a T119 resolution. In the vertical, it uses a finite-element representation. The model is semi-implicit, semiLagrangian, with a three time-level discretization.

C ~ 9: A .. 81 " ~ C N .. .. • .... § .. ~ /\. • § .. .. /\ " C " h l' II ". , POSITION (DEG) ,a, .. , Fig. 5. Domain cross section of the geopotential height field with a gravity wave perturbation. The solid lines mark the IimiL<; of the uniform-resolution subdomain of the global variable mesh. , 1992: The Euler equations of motion with hydrostatic pressure as an independent variable. Mon. Wea. , 120. 197-207. EXPERIBNCES WITH PARALLEL PROGRAMMING IN ME1EOROLOGY Fritz G. uk ACKNOWLEDGEMENTS The efforts described in this paper are the work of a number of people.

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