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1
Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik
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Validation of the hydrodynamic part of the ecohydrodynamic model for the Southern Baltic

100%
Jedrasik J.
Oceanologia
|
2005
|
tom 47
|
nr 4
The first part of the Baltic Sea ecohydrodynamic model, based on the Princeton Ocean Model (POM), was validated by long-term observations of sea level, salinity and water temperature fluctuations. The modelled sea surface temperature (SST) fields were also compared to satellite images – satisfactory correlation coefficients were obtained. The model bias and efficiency coefficients of the modelled variables in relation to the observed values were determined. The quality of model simulations in relation to measured values was estimated with respect to spatial and seasonal variability in shallow and deep coastal waters as well as in the open sea. The results indicated the high quality of simulations by the hydrodynamic model.
2

Assimilation experiments in the Gdansk Basin [the Sout-Eastern Baltic]: How useful are the sea level data from coastal tide gauges for modelling of hydrophysical fields?

63%
Jankowski A., Jedrasik J.
Oceanological and Hydrobiological Studies
|
2007
|
tom 36
|
nr 4
105-128
3

The water exchange in estuarine lakes of the Southern Baltic Sea as on the Gardno Lake example

63%
Jedrasik J., Cyberski J.
Oceanological Studies
|
2000
|
tom 29
|
nr 3
4
Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik
Content available

Ecohydrodynamic model of the Baltic Sea. Part 2. Validation of the model

63%
Jedrasik J., Szymelfenig M.
Oceanologia
|
2005
|
tom 47
|
nr 4
The ecohydrodynamic model for the Baltic Sea consists of two interacting parts: one describes the hydrodynamics of the water (3HD), the other organic matter production and destruction (ProDeMo).The results of the simulation were validated.The modelled processes were compared with direct observations, which demonstrated the recurrence of cycles, from the spring diatom blooms through the summer depletion of nutrient salts and algal blooms, to autumn blooms of diatoms and the subsequent destruction of organic matter, and intensified mineralisation of detritus in winter.Ca libration yielded a set of coefficients complementing the algorithm of equations describing the production and destruction of organic matter in the coastal zone.V erification of the model has demonstrated that in multi-year simulations it is stable and also that it follows the laws of conservation of mass and energy.T he third procedural stage of the model investigation was validation, in which statistical measures in the form of bias, correlation coefficients and effectiveness between simulations and observations not used in calibration describe the quality of ecohydrodynamic modelling in southern Baltic Sea waters.
5

Morphologic and hydrodynamic conditions of Hel Peninsula's abrasion in the Kuznica Region [Southern Baltic]

51%
Leczynski L., Chlebus N., Grusza G., Jedrasik J.
Oceanological and Hydrobiological Studies
|
2007
|
tom 36
|
nr 2
6
Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik
Content available

Ecohydrodynamic model of the Baltic Sea. Part 1. Description of the ProDeMo model

51%
Oldakowski B., Kowalewski M., Jedrasik J., Szymelfenig M.
Oceanologia
|
2005
|
tom 47
|
nr 4
The ProDeMo (Production and Destruction of Organic Matter Model), a 3D coupled hydrodynamic-ecological model, was formulated and applied to the whole Baltic Sea and the subregion of the Gulf of Gdańsk. It describes nutrient cycles (phosphorus, nitrogen, silicon) through the food web with 15 state variables, oxygen conditions and the parameterisation of water-sediment interactions. The present version of the model takes two groups of phytoplankton – diatoms and non-diatoms – as well as zooplankton into consideration. It covers the flow of matter and energy in the sea, including river discharges and atmospheric deposition. Numerical applications are embedded on a 1 NMgri d for the Gulf of Gdańsk and a 5 NMgri d for the Baltic Sea. Since the model results largely concur with observations, the model can be regarded as a reliable tool for analysing the behaviour of the Baltic ecosystem. Some examples of the spatial-temporal variability of the most important biological and chemical parameters are presented. The model results are compared with those of other modelling research in the Baltic Sea. Both the ProDeMo model algorithm and its computing procedures need to be further developed. The next version should therefore enable more phytoplankton groups to be defined, for example cyanobacteria, which are able to take up molecular nitrogen from the atmosphere (nitrogen fixation). Additionally, the sediment phase should be divided into active and non-active layers.
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