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1
Content available Verification of drift models of rhodamine spill, life-raft and dummy-man during experiment POLRODEX'97
Gajewski J., Gajewski L., Stachowiak A.
Biuletyn Instytutu Morskiego w Gdańsku
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1999
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Vol. 26, No. 1
87--106
EN
The part of the experiment POLRODEX'97 was a set of drift experiments including the rhodamine spill, life raft and dummy-man drifting experiment. The experiments have been realised in order to both verify the hydrodynamic model results and increase the knowledge on drifting object behaviour including the possibilities to model the object drift using the operational results of HIROMB model. The results of the drifting experiments are shown. Some deficiencies in operational hydrodynamic and meteorological models are named.
2
Content available Measured and predicted values of water temperature and salinity with special focus on the surface layer
Kamińska M.
Biuletyn Instytutu Morskiego w Gdańsku
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1999
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Vol. 26, No. 1
97--111
EN
The Baltic is a stratified sea. The upper layer is under the influence of atmospheric and terrestial factors. The mechanisms of these external factors on the surficial and subsurface water layer are well recognised but the vertical exchange in the water body is still not sufficiently investigated. Field measurements at sea are time consuming and expensive. A model of the Baltic Sea distributed to and accessible by institutions investigating the Baltic Sea is advantageous because of easier exchange modelled data. The modelling, especially of the surface layer is important due to the fact that outside the coastal zone continuous measurements of physical parameters is difficult. The comparison between measured in situ and modelled data serves as a tool for the corrections to HIROMB resulting in better approximation of real phenomena occurring in the Baltic Sea. Temperature and salinity values obtained on board rlv Baltica during the POLRODEX'97 expetriment were compared with modelled values. The analysis showed significant differences between in situ measurements and obtained from the HIROMB model.
3
Content available General information on the data, collected during the experiment POLRODEX '97
Staśkiewicz A.
Biuletyn Instytutu Morskiego w Gdańsku
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1999
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Vol. 26, No. 1
7--12
EN
The HIROMB model for the Baltic Sea hydrodynamic forecast, at present being run preoperationally in SMHI, covers completely the Polish exclusive economic zone of the sea. The measuring campaign POLRODEX '96 was organised and coordinated by the Maritime Institute especially for calibration and verification of numerical models in summer 1996 in the Gulf of Gdansk Five Polish and one Swedish institution were involved in the campaign. After the experiment, which resulted in many valuable materials, it was decided to continue such campaigns every year. In 1997, also in the Gulf of Gdansk, a new experiment POLRODEX '97 was organised, in which thirteen institutions from Poland, Russia and Sweden participated. A list of the data, collected during the POLRODEX '97, is provided.
4
Content available Currents in the open Baltic Sea measured during POLRODEX '97 experiment preliminary interpretation
Kaźmierski J.
Biuletyn Instytutu Morskiego w Gdańsku
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1999
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Vol. 26, No. 1
69--75
EN
The paper presents analysis of cun·ents and other physical parameters of sea water: salinity, temperature, and water level. The measurements were made in the north - western part of the Gdansk Bay during POLRODEX '97 experiment took place. Measured data are described, and their preliminary interpretation is given. Periodicity of currents and temperature oscillations is especially underlined.
5
Content available Assessment of the temporal variability of hydro-physical parameters in the HIROMB model
Robakiewicz M.
Biuletyn Instytutu Morskiego w Gdańsku
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1999
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Vol. 26, No. 1
57--68
EN
Comparison between long-term measurements carried out during POLRODEX'97 experiment and results from HIROMB is presented. Analysis based on graphical presentation and statistical measure (reliability index) shows that model reproduces current direction fairly well, while current magnitude is underestimated. Time variability of salinity, temperature and water level variation reproduced by the model indicates discrepancies from observations.
6
Content available Assessment of numerical wind forecasts for the Gdańsk bay area during the POLRODEX'97 experiment
Kałas M., Jakubiak B.
Biuletyn Instytutu Morskiego w Gdańsku
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1999
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Vol. 26, No. 1
13--25
EN
The paper presents results of forecasts of wind field parameters over the Baltic Sea for the Gdańsk Bay area obtained using two atmosphere models: UMPL (ICM Warsaw University) and HIRLAM (SMHI Sweden). The obtained results are compared with field observations made on the open sea and at coastal stations during the POLRODEX'97 experiment. The agreement is quite good, although the influence of local weather conditions cannot be neglected.
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