Programme of the ALATNET Seminar on Numerical Methods and NWP applications
(updated on Monday May 13, 2002)
Welcome and ALATNET presentation
Numerical Analysis (Joze Rakovec and Tomaz Vrhorec, Si), 5 hours
Dynamics (Petra Smolikova, Cz), 5 hours
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System of equations (hydrostatic, anelastic and fully compressible models)
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Integration schemes (Eulerian versus semi-Lagrangian)
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Discretization methods (spectral, finite elements, finite differences)
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Time discretization (explicite, implicite, semi-implicite correction)
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Horizontal discretization as a consequence of other choices
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Vertical discretization as a consequence of other choices
Physics (Jean-Francois Geleyn, F), 5 hours
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Feed-back, multiple equilibrium states, stationnary vs. average solutions
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Numerical constraints on the parameterisation work
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Flux and tendencies, the dilemma
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Physical time-stepping (classical & with "passive" prognostic physical
quantities)
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Linear instabilities and split-implicit solutions
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Stiffness and splitting
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Non-linear instabilities and upstream differencing
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Synthesis
Variational methods (Yves Bouteloup, F), 4 hours
Numerical Filters (Gabor Radnoti, Hu and Piet Termonia, Be) 4 hours
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Generalities
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Slowing down waves by space filters
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Damping waves by time filters
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The specific LAM coupling problem seen as a filter
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The data assimilation side of the problem
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Overview
Stochastic aspects (Claude Fischer, F), 3 hours
Data Management and scripts (Claude Fischer, F), 1 hour
Debriefing