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Wyświetlanie 1-5 z 5
Tytuł:
The comparison of the forecasted and measured currents in the deep part of the Southern Baltic Sea in 1999
Autorzy:
Krzymiński, W.
Powiązania:
https://bibliotekanauki.pl/articles/972854.pdf
Data publikacji:
2001
Wydawca:
Instytut Morski w Gdańsku
Tematy:
Southern Baltic Sea
forecasts
HIROMB
Opis:
This paper presents results of the investigation carried out in frame of research project of Institute of Meteorology and Water Management Maritime Branch in Gdynia (IWM-MB) in the y ear 2000. The goal of the project was to determine the conformity of the sea current forecasts for the layer 8 - I 2 meters of the open sea part of the Southern Baltic Sea, as produced by the hydrodynamic model of the Baltic Sea- HIROMB [5}, with the measurements. Contrary to the results of previous experiments as in the case of the POLRODEX ones [7, 8, 9}, during present study it was expected to detect behaviour of the model far from the influence of the boundary like coastline as well as bottom friction in the shallow water areas. The analysed data were collected during five routine cruises of r/v Baltica organized by IWMMBsince February until September I999 [10], when cruise track started/rom the Gdansk Deep, next along the northern border of the Polish EEZ, ending in the Bomholm Deep area usually. On the basis of the current vectors recorded by means of the ship mounted ADCP as the 250 m average values in the layer 7.5 to 12.5 meters, mean values related to the model grid have been calculated and statistically assessed. These mean vectors have been used for compan·son of forecasted values. Consequently, the sets of values of the differences between measured and predicted currents were statistically evaluated both regarding the direction and the module of the currents as well as the current vector components (Vx, Vy) separately.
Źródło:
Biuletyn Instytutu Morskiego w Gdańsku; 2001, 28, 2; 55-64
1230-7424
2450-5536
Pojawia się w:
Biuletyn Instytutu Morskiego w Gdańsku
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
HIROMB forecasts versus spatial measurements of the currents by means of rdi's BBADCP during the POLRODEX'97 experiment
Autorzy:
Krzymiński, W.
Powiązania:
https://bibliotekanauki.pl/articles/1920506.pdf
Data publikacji:
1999
Wydawca:
Instytut Morski w Gdańsku
Tematy:
HIROMB forecasts
measurements
POLRODEX'97 experiment
Opis:
The paper presents the observations of the flow field within central part of the Gulf of Gdansk, which have been carried out during POLRODEX'97 experiment in September 1997 by means of BBADCP (Broad Band Acoustic Doppler Current Profiler). In the paper some results of comparison between predicted values and measured are presented as well. The goal of the experiment it was to collect the data in order to verify numerical model calculations and to study the method of the flow field reconstruction. The cruise took place on the RV BALTICA, which carried a shipboard RDI' s BBADCP measuring device. The measurements were carried out along parallel transects with 30 s frequency of the collected averaged bins, while velocities of the current were computed relative to the bottom. The flow fields were examined at alti-meter layers from 8 meters depth down to the bottom layer on 22 -24 of September 1997. For the analysis, the data for one layer (mid value 12 m.) were selected and prepared for the comparison. On the basis of the results of the measurements, quasicsynoptic flow fields were reconstructed. It made possible to compare them with the results of the HIROMB forecasts. In pre-analysis phase the two forecasts, i.e.: 24 hours for 22nd and 6 hours for 23rd forecast were compared with the measurements. It showed us that the best result would be obtained for shortest time span between measurements and forecast. So, for further analysis the 6 hours forecast for 23rd was used. Then, the statistical analysis of differences was carried out. In order to find any regularity of the differences distribution it is discussed their spatial layout as well. In general, the most significant differences occurred in the northern part of the investigated area. Differences increased from the centre of the gulf toward east and north. It was clearly seen that model reproduce current velocities and directions well mainly along the Hel Peninsula and in central part of the Gulf In other areas, velocities of the predicted currents are of another order of magnitude than measured values. Despite the results of the comparison between measured and modelled values, the collected data showed well-expressed pattern of the flow in the gulf what could be studied further.
Źródło:
Biuletyn Instytutu Morskiego w Gdańsku; 1999, 26, 1; 77-86
1230-7424
2450-5536
Pojawia się w:
Biuletyn Instytutu Morskiego w Gdańsku
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The comparison of the forecasted and measured currents in the deep part of the Southern Baltic Sea in 1999
Autorzy:
Krzymiński, W.
Powiązania:
https://bibliotekanauki.pl/articles/1920609.pdf
Data publikacji:
2001
Wydawca:
Instytut Morski w Gdańsku
Tematy:
Southern Baltic Sea
forecasts
HIROMB
Opis:
This paper presents results of the investigation carried out in frame of research project of Institute of Meteorology and Water Management Maritime Branch in Gdynia (IWM-MB) in the y ear 2000. The goal of the project was to determine the conformity of the sea current forecasts for the layer 8 - I 2 meters of the open sea part of the Southern Baltic Sea, as produced by the hydrodynamic model of the Baltic Sea- HIROMB [5}, with the measurements. Contrary to the results of previous experiments as in the case of the POLRODEX ones [7, 8, 9}, during present study it was expected to detect behaviour of the model far from the influence of the boundary like coastline as well as bottom friction in the shallow water areas. The analysed data were collected during five routine cruises of r/v Baltica organized by IWMMBsince February until September I999 [10], when cruise track started/rom the Gdansk Deep, next along the northern border of the Polish EEZ, ending in the Bomholm Deep area usually. On the basis of the current vectors recorded by means of the ship mounted ADCP as the 250 m average values in the layer 7.5 to 12.5 meters, mean values related to the model grid have been calculated and statistically assessed. These mean vectors have been used for compan·son of forecasted values. Consequently, the sets of values of the differences between measured and predicted currents were statistically evaluated both regarding the direction and the module of the currents as well as the current vector components (Vx, Vy) separately.
Źródło:
Biuletyn Instytutu Morskiego w Gdańsku; 2001, 28, 2; 55-64
1230-7424
2450-5536
Pojawia się w:
Biuletyn Instytutu Morskiego w Gdańsku
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Preliminary assessment of the eutrophication status of selected areas in the Polish sector of the Baltic Sea according to the EU Water Framework Directive
Autorzy:
Lysiak-Pastuszak, E.
Osowiecki, A.
Filipiak, M.
Olszewska, A.
Sapota, G.
Woron, J.
Krzyminski, W.
Powiązania:
https://bibliotekanauki.pl/articles/48320.pdf
Data publikacji:
2006
Wydawca:
Polska Akademia Nauk. Instytut Oceanologii PAN
Tematy:
ecological quality status
European Union
Water Framework Directive
implementation
Baltic Sea
ecosystem
eutrophication
Opis:
The implementation of the European Union Water Framework Directive required a number of tasks to be fulfilled: classifying the various water bodies into different types, defining reference conditions for each of the types and assessing their ecological quality status – this last is based on biological, hydromorphological and physicochemical quality elements of the ecosystem. The paper presents an attempt to estimate reference values in selected areas of Polish coastal and transitional waters as well as in an open sea area following WFD principles. The preliminary eutrophication assessment showed all the assessed areas to be eutrophication problem areas.
Źródło:
Oceanologia; 2006, 48, 2
0078-3234
Pojawia się w:
Oceanologia
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A study of episodic events in the Baltic Sea – combined in situ and satellite observations
Autorzy:
Lysiak-Pastuszak, E.
Bartoszewicz, M.
Bradtke, K.
Darecki, M.
Drgas, N.
Kowalczuk, P.
Krasniewski, W.
Krezel, A.
Krzyminski, W.
Lewandowski, L.
Mazur-Marzec, H.
Piliczewski, B.
Sagan, S.
Sutryk, K.
Witek, B.
Powiązania:
https://bibliotekanauki.pl/articles/48563.pdf
Data publikacji:
2012
Wydawca:
Polska Akademia Nauk. Instytut Oceanologii PAN
Tematy:
Baltic Sea
Ferry Box project
algal bloom
hepatotoxin
satellite image
coastal water
oceanic water
salinity
temperature
Opis:
A project was developed concerning the operational system of surveillance and the recording of episodic events in the Baltic Sea. In situ information was to be combined with multi-sensory satellite imagery to determine the extent of algal blooms, to track their evolution and that of rapid environmental events like hydrological fronts. The main element of the system was an autonomous Ferry Box module on a ferry operating between Gdynia and Karlskrona, automatically measuring temperature, salinity and chlorophyll a fluorescence. At pre-selected locations, discrete water samples were collected, which were subsequently analysed for their phytoplankton content, and algal hepato- and neurotoxins; they were also used in toxicity tests with Artemia franciscana.
Źródło:
Oceanologia; 2012, 54, 2
0078-3234
Pojawia się w:
Oceanologia
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-5 z 5

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