The actions reported in this part "ALATNET developments" of the Newsletter are part of the ALATNET 4 year work plan.
During these months, as presented in the ALATNET events , a great part of the ALATNET effort was dedicated to the preparation of the contract, some administrative tasks, the selection of the first candidates, some organisational developments (ALATNET web server, data base for ALATNET work accounting, ... ), ...
The ALATNET training (with the ALATNET Seminar on high-resolution modelling) has already begun.
The actions reported in this part "ALATNET developments" of the Newsletter are part of the ALATNET 4 year work plan.
1. The ALATNET Research Program
2. The ALATNET Work Plan
3. First reports from ALATNET centres
The actions reported in this part "ALATNET developments" of the
Newsletter are part of the ALATNET 4 year work
plan.
3.a Caution
For this very first ALATNET Newsletter, reports are in a very simplified form. However more details should be found in ALADIN reports ( Deported, Prague 1 & 2, Toulouse ). The order of presentations follows the numbering of ALATNET partners.
3.b. In Toulouse (France)
Development of the vertical plane version of ALADIN : upper boundary
condition (sponge layer).
Investigation of the stability properties of NH dynamics.
Investigation of the problem of orographic resonance in semi-lagrangian
advection.
First analyses for the implementation of a predictor-corrector method.
Introduction of vertical acceleration effects in semi-lagrangian advection.
Analysis of the required code modifications, for hydrostatic and
non-hydrostatic dynamics.
First impact studies.
Update of scripts and code for the blending of spectral fields, first tests
with ALADIN / FRANCE.
Investigation of coupling problems, impacts of domain size and resolution in
3d-var assimilation.
Control of the robustness of the physics-dynamics interface to variations of the time-step.
Exhaustive investigation of the impact of some choices in the
parameterization of convection on a case of severe floods.
Correction of some problems in the parameterization of boundary layer.
More precise parameterization of radiative exchanges.
Definition of a "functional boxes" frame for the implementation
of a new microphysics parameterization.
Improvements in the parameterization of snow cover, taking into account the
impact of vegetation.
Coding and test of a new parameterization of exchanges at sea-surface.
Development and test of new initialization procedures for the temperature of
lakes; test of the impact of the initial temperature of lakes, on the case of
lake Balaton; definition of a first parameterization of the evolution of the
temperature of lakes.
Finding new high resolution datasets for soil and vegetation characteristics;
first tests of the new vegetation database.
Test of a new database for orography and urbanisation; re-examination of the
definition of an "optimal" spectral orography.
Investigation of the impact of some choices in the definition of orography at
small scale.
Definition of a new, more precise, thermodynamics.
Update and first tests of the O.I. analysis of snow cover, never
implemented operationally; only SYNOP data are considered at this stage.
Developments for the use of IASI data, at large scale first.
Definition and test of new background error statistics, in the framework of
a decremental approach.
Definition and test of several methods to control analysis increments at the
lateral boundaries.
Writing specific scripts for "single-obs" and "full-obs"
3d-var assimilation.
Sensitivity studies using adjoint methods.
Definition of a new digital filter initialization technique to improve the control of humidity increments in 4d-var assimilation.
3.c In Bruxelles (Belgium)
3.d In Prague (Czech Republic)
3.e In Budapest (Hungary)
3.f In Ljubljana (Slovenia)
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