Die Kuste, 81 (2014), 273-290
277
Figure 3: water depth of the KU-grid.
Figure 4: water depth of the EL-grid.
2.3 Forcing
Atmospheric forcing for all BSH model-setups is provided by die operational forecasts of
the German Weather Service (DWD). The meteorological input parameters lOm-wind,
air pressure, humidity, cloudiness and 2m-air temperature are received by BSH four times
a day. Whereas the NA-setup needs forcing fields which are a combination of output
from the global model GME (MAJEWSKI et al. 2012) with an effective horizontal reso
lution of 20 km and the European model COSMO-EU (SCHULZ and SchATTLER 2011)
with a horizontal resolution of currently 7 km, the NOKU- and the EL-setup are driven
only by COSMO-EU data.
A radiation boundary condition is applied in die NA-setup, so diat no external data
for die open boundary is needed. At the open boundary of the NOKU-setup die sum of
surge data from die NA-setup and tides based on 19 partial constituents are used. The
EL-setup finally gets its open boundary data from the NOKU-setup.
Moreover eighty rivers are considered in the NOKU1- and one (the Elbe) in the EL-
setup. Whereas data of the German rivers is provided operational by the German Federal
Institute of Hydrology (BfG), data for all Baltic rivers (except die Odra) is taken from die
operational HBV model (BERGSTROM 1995) running at die SMHI. Because of a lack of
data all the remaining rivers in the Nortii Sea (mostly from die LTK) are based on
climatological data.
2.4 Operational schedule / Computer facilities
The described model system runs currently once per day on an IBM P7 755 server (4x8
core, 3.6 Ghz Power7 processors) witii 16 openMP-direads and witiiout MPI parallelisa
tion. The HBM-code was compiled witii die IBM-xlf-compiler. For illustrating results
botii MATLAB and GMT are used.
2.5 Archive
BSH maintains an extensive archive of model forecasts which includes data since 2000.
All archived data are available free of charge. The longest consistent data set is die output
