Variability in the saline water exchange between the Baltic and the Gulf of Gdansk by the sigma-coordinate model

• Autorzy: Jankowski, A.
• Języki publikacji: EN

Abstrakty

EN

A three-dimensional baroclinic sigma-coordinate model was applied to study the circulation and thermohaline variability in the coastal zone in the south-eastern Baltic Sea. The model is based on the Princeton Ocean Model code of Blumberg & Mellor (1987), known as POM, and has the horizontal resolution of ~5 km and 24 sigma-levels in the vertical. The hydrodynamic conditions and variability of water and salt exchange between the Gulf of Gdansk and the Baltic Proper, and the renewal of water masses in the Gulf of Gdansk due to atmospheric forcing are analyzed. The numerical simulations were performed with real atmospheric forcings as well as with homogeneous (spatially uniform) wind fields over the whole Baltic Sea. The numerical simulations showed that the atmospheric forcing (winds) can play a significant role in shaping the renewal of bottom saline waters in the Gulf of Gdansk. Two regions of inflow/outflow of saline waters responsible for the salinity regime were located. The overall water exchange between the Gulf and the Baltic Proper as well as the exchange of saline bottom waters appear to be strongly dependent on wind conditions. The net flux of water of salinity >9 PSU is of the order of 48000-100000 m3 s-1. SE, E, S and NE winds were found to exert the greatest influence on salinity conditions in the Gulf of Gdansk. Estimates of saline (salinity >9 PSU) water residence time based on the model simulation yielded values from 46 days for SE winds to 153 days for NW winds.

Słowa kluczowe

EN

Baltic Sea; Gulf of Gdansk; water and mass exchange; residence time

• Czasopismo: Oceanologia
• Rocznik: 2003
• Tom: No. 45 (1)
• Strony: 81-105
• Opis fizyczny: Bibliogr. 33 poz., rys., tab., wykr.

Twórcy

autor

Jankowski, A.

• Institute of Oceanology, Polish Academy of Sciences, Powstańców Warszawy 55, PL-81-712 Sopot, Poland,

Bibliografia

• [1] Andrulewicz G., 1996, Regional characteristics of the Gdańsk Basin, [in:] An assessment of the effects of pollution in the Polish marine area of the Baltic Sea, 1989-1993, Oceanol. Stud., 25 (1-2), 11-16.
• [2] BED, 2000, Atmospheric inputs, [in:] The BED database, http://data.ecology.su.se/Models/bedcontent.htm.
• [3] Blumberg A. F., Mellor, G. L., 1987, A description of a three-dimensional coastal ocean circulation model, pp. 1-16, [in:] Three-dimensional coastal ocean models, N. S. Heaps (ed.), Am. Geophys. Union., 4, 208 pp.
• [4] Bock K.-H., 1971, Monatskarten des Salzgehaltes der Ostsee, dargestellt für verschiedene Tiefenhorizonte, Dt. Hydrogr. Z., 12, 148 pp.
• [5] Bolin B., Rhode H., 1973, A note on the concept of age distributions and transient time in natural reservoirs, Tellus, 25, 58-62.
• [6] Dick S., Schönfeld W., 1996, Water transport and mixing in the North Frisian Wadden Sea –results of numerical investigations, Dt. Hydrogr. Z., 48 (1), 27-48.
• [7] Elken J. (ed.), 1996, Deep water overflow, circulation and vertical exchange in the Baltic Proper, Estuar. Mar. Inst. Rep. Ser., 6, Tallinn, 91 pp.
• [8] Forsythe G. E, Malcolm M. M, Moler C. B., 1977, Computer Methods for Mathematical Computations, Prentice-Hall, Inc., Englewood Cliffs, N. J. 076332, 299 pp.
• [9] Jankowski A., 1983, Steady wind-driven and river inflow circulation in the Gulf of Gdańsk, Stud. i Mater. Oceanol., 40, 203-221.
• [10] Jankowski A., 1984, Dynamics of the steady wind-driven circulation in the Gulf of Gdańsk /homogeneous basin/, Stud. i Mater. Oceanol., 43, 5-79.
• [11] Jankowski A., 1985, Water mass exchange between the Gulf of Gdańsk and Baltic Sea, Oceanologia, 20, 5-15.
• [12] Jankowski A., 1997, On the role of wind on water circulation in the southern Baltic Sea in the vicinity of the Gulf of Gdańsk, Proc. Conf. Modelling Ecosystems of the Gulf of Gdańsk, Uniw. Gd., Gdynia, 35-45, (in Polish).
• [13] Jankowski A., 2000, Wind induced variability of hydrological parameters in the coastal zone of the Southern Baltic Sea –numerical study, Oceanol. Stud., 29 (3), 5-34.
• [14] Jankowski A., 2002a, Application of the σ-coordinate baroclinic model to the Baltic Sea, Oceanologia, 44 (1), 59-80.
• [15] Jankowski A., 2002b, Variability of coastal water hydrodynamics in the Southern Baltic hindcast modelling of an upwelling event along the Polish coast, Oceanologia, 44 (4), 395-418.
• [16] Jędrasik J., 1997, The influence of the advection on the water temperature distribution in the Gulf of Gdańsk; a numerical study, Oceanol. Stud., 26 (4), 41-64.
• [17] Kowalewski M., 1997, A three-dimensional hydrodynamic model of the Gulf of Gdańsk, Oceanol. Stud., 26 (4), 77-98.
• [18] Kowalik Z., Wróblewski A., 1971, Steady –state wind-driven currents in the Gulf of Gdańsk, Acta Geophys. Pol., 19, 111-125, (in Polish).
• [19] Krauss W., Brügge B., 1991, Wind-produced water exchange between the deep basins of the Baltic Sea, J. Phys. Oceanogr., 21, 373-384.
• [20] Lehmann A., 1995, A three-dimensional baroclinic eddy-resolving model of the Baltic Sea, Tellus, 47A, 1013-1031.
• [21] Lenz W., 1971, Monatskarten der Temperatur der Ostsee, dargestellt für verschiedene Tiefenhorizonte, Dt. Hydrogr. Z., 11, 148 pp.
• [22] Majewski A. (ed.), 1990, The Gulf of Gdańsk, Wyd. Geol., Warszawa, 400 pp., (in Polish).
• [23] Mayer D. G., Butler D. G., 1993, Statistical validation, Ecol. Modelling, 68, 21-32.
• [24] Mellor G. L., 1993, User’s guide for a three-dimensional, primitive equation, numerical ocean model, Prog. Atmos. Ocean. Sci., Princeton University, 35 pp.
• [25] Mesinger F., Arakawa A., 1976, Numerical models used in atmospheric models, GARP Publ. Ser., 17 (1), WMO – ICSU, 64 pp.
• [26] Monsen N. E., Cloren J. E., Lucas L. V., 2002, A comment on the use of flushing time, residence time, and age as transport time scales, Limnol. Oceanogr., 47 (5), 1545-1553.
• [27] Oey L.-Y., Chen P., 1992, A model simulation of circulation in the northeast Atlantic shelves and seas, J. Geophys. Res., 97, 20087-20115.
• [28] Rasmussen B., Josefson A. B., 2002, Consistent estimates for the residence time of micro-tidal estuaries, Estuar. Coast. Shelf Sci., 54, 65-73.
• [29] Seifert T., Kayser B., 1995, A high resolution spherical grid topography of the Baltic Sea, Meereswissensch. Ber., Inst. für Ostseeforschung, Warnemünde, 9, 72-88.
• [30] Trzosińska A., Cyberska B., 1992, Oxygen and hydrogen sulphide, [in:] Assessment of the effects of pollution in the Polish coastal area of the Baltic Sea, 1984-1989, A. Trzosińska, E. Andrulewicz & M. Pliński (eds.), Stud. i Mater. Oceanol., 61 (2), 73-92.
• [31] Trzosińska A., Łysiak-Pastuszak E., 1996, Oxygen and nutrients in the southern Baltic Sea, [in:] Assessment of the effects of pollution in the Polish marine area of the Baltic Sea, 1989-1993, Oceanol. Stud., 25 (1-2), 41-76.
• [32] Witek Z., Łysiak-Pastuszak E., Grelowski A., Humborg C., Savchuk O., Swaney D., 2000, Nitrogen and Phosphorus Budgets of the Gulf of Gdansk, http://data.ecology.su.se/mnode/Europe/GulfofGdansk/gdanskbud.htm.
• [33] Żmudziński L., 1994, Flora and fauna, pp. 165-173, [in:] The Baltic Sea Atlas, A. Majewski & Z. Lauer (eds.), Inst. Meteor. Gosp. Wod., Warszawa, 214 pp., (in Polish).