Description: Das Projekt "European Regional Seas Ecosystem Model, ERSEM" wird vom Umweltbundesamt gefördert und von Universität Hamburg, Zentrum für Meeres- und Klimaforschung, Institut für Meereskunde (IfM) durchgeführt. In the ERSEM project three different setups of the ecosystem model ERSEM for the whole North Sea were defined, the setup ND15, the setup ND130 and the setup COCOA, the continental coastal application. In the setup ND130 the North Sea is divided into 130 spatial boxes; the boxes are mostly regular 1Grad C x 1Grad C squares. During summer many areas of the North Sea are stratified, and during this period primary production is mostly confined to the upper layer. The boxes were divided in the vertical at the depth of 30 m wherever stratification prevails during summer. This depth was shown to be a reasonable approximation of the thermocline depth in the North Sea (Lenhart et al., 1995, Lenhart & Pohlmann, 1996). In this way 45 boxes are separated into an upper and a lower box for the setup ND130. In Fig. 1b two box numbers are given for the stratified 1Grad C by 1Grad C areas. The box setup ND130 was chosen as the standard setup during the second phase of the ERSEM project (1993 - 1996), when we started to apply ERSEM to the coastal areas where the 15-box setup ND15 did not satisfy the needs of spatial resolution to properly describe the pathway of river inputs from the estuaries along the continental coast into the central North Sea. The setup is related to the HAMSOM grid, i.e. the numerical grid used for the hydrodynamical simulations which are utilized in ERSEM as forcing (Backhaus, 1989; Lenhart et al., 1995). The regular box size is 3 (east-west) by 5 (north-south) grid points, which corresponds approximately to rectangles of 60 km times 100 km side lengths. In addition to the interior boxes 1 to 130, boundary boxes 131 to 155 were defined, because they shall serve for defining boundary conditions for the model (see e.g. Radach & Lenhart, 1995). The northern North Sea is closed towards the Atlantic ocean by the boxes 131 to 141 (east to west) in the surface and by the boxes 144 to 154 in the deeper layers. The Skagerrak partly belongs to the interior of the model domain in ND130, and the eastern Skagerrak and northern Kattegat serve as boundary box 143 (surface) and box 155 (deep). In the Channel box 142 was added. Data were and are needed in the ERSEM project for several purposes. For initializing and forcing in the setup ND130 of the ecosystem model ERSEM data are needed in amounts that allow to prescribe the initial situation within the North Sea and the temporally continuous forcing at the open boundaries of the simulation area (i.e. boundary conditions) by statistically meaningful data products. For testing and validating the model we need annual cycles of the main state variables to enable a comparison of model outcome with observed system behaviour.
Types:
SupportProgram
Origin: /Bund/UBA/UFORDAT
Tags: Ästuar ? Gerinne ? Wasserstraße ? Fluss ? Hamburg ? Main ? Kontinuierliche Simulation ? Meereskunde ? Metalimnion ? Marines Ökosystem ? Daten ? Kreislaufsystem ? Ökosystemmodell ? Meeresgewässer ? Küstenregion ? Klimaforschung ? Innenraum ? Nordsee ?
Region: Hamburg
Bounding box: 9.99302° .. 9.99302° x 53.55073° .. 53.55073°
License: cc-by-nc-nd/4.0
Language: Deutsch
Time ranges: 1990-09-01 - 1996-06-30
Accessed 1 times.