Marine Ecohydrodynamics

Laboratory





Marine Ecohydrodynamics Laboratory was created in its present form in January 2007 to bring together the hydrodynamicists and ecologists to understand many complex marine problems. The main objective of the studies is to make physical processes intelligible to biologists using the mathematical tools as well as make the nature of life in the sea understandable to oceanographers. It is expected that the studies carried out within the Laboratory help the marine biologist and ecologists to know more about the mechanisms by which plants and animals live in the oceans, as well as physical oceanographers and fluid dynamicists to see how their knowledge of mechanics can be used to study marine ecology.



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Prof. Czesław Druet    druet@iopan.gda.pl

Assoc. Prof. Lidia Dzierzbicka-Głowacka    dzierzb@iopan.gda.pl

M. Sc. Maciej Janecki    amjanecki@iopan.gda.pl

M. Sc. Artur Nowicki    anowicki@iopan.gda.pl

Dr. Jaromir Jakacki    jjakacki@iopan.gda.pl



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  • modelling hydrodynamical and biological processes, having the influence on the space-time variability of the biological characteristics investigated.

  • quantitative expressions describing the various relationships between the rates of physiological processes of the dominant species and environmental factors are developed. The functional relations can be used in a simulation of the response of zooplankton to variations in their environment. The development of such theoretical descriptions is critical to the inclusion of these animals, as animals, in more general simulations of ecosystems.

  • numerical simulations of the influence of the turbulent mixing processes on the prey-predator interactions.

A one-dimensional Coupled Ecosystem Model (1D-CEM) consists of three submodels: a meteorological submodel for the physics of the upper layer and a biological submodel which is also driven by output from the physical submodel. The biological submodel is coupled with a high-resolution zooplankton module and a simple prey-predator module. In this model, mesozooplankton (herbivorous copepods) has been introduced as an animal having definite patterns of growth in successive stages, reproduction and mortality. However, the fish - predator is represented by 3 cohorts of early juvenile herring Clupea harengus. A copepod model describes the seasonal dynamics of Pseudocalanus minutus elongatus and Acartia spp. in the southern Baltic Sea. The copepod model links trophic processes and population dynamics, and simulates individual growth within cohorts and the changes in biomass between cohorts.

The 1D-CEM is an open model which enables the study of: (1) annual, seasonal, monthly and daily variability of marine plankton in the southern Baltic Sea, (2) the impact of various climatic conditions over several years, and (3) the influence of different hydrophysical and biological processes on the vertical distributions of characteristics as a function of time.




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Figure. Average number of eggs in a function of cephalothorax length. Lines were fitted to data using the equations in Table 1 in paper D-G 2004.



Figure. The average daily production of egg matter per female as a function of temperature for satiated populations after D-G 2004.





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Assoc. Prof. Andrzej Jankowski    jankowsk@iopan.gda.pl


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  • the research focuses on hydrological characteristics and modelling (hydrodynamical - numerical) of meso- and macro-scale hydrodynamical phenomena and processes in the stratified seawater basins (natural and model ones).


The aim of the research is to study variability of hydrodynamic conditions of the basic hydrodynamical characteristics due to natural and antrophogenic changes in the sea - atmosphere - land system and analysis of consequences of this variability on the marine environment. The investigations are mainly related to the Baltic Sea and adjacent basins. Particular interest is given to modelling of three-dimensional (3-D) water circulation and upwelling events in the Baltic Sea.



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Prof. dr hab. Stanisław Massel    smas@iopan.gda.pl

Mgr inż. Anna Przyborska    aniast@iopan.gda.pl


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  • ocean surface waves dynamics and air-sea interaction


The aim of the study is the mechanics of ocean wave breaking and its influence on the marine aerosol fluxes and gas transfer from the sea surface. In particular, the energy dissipation and estimation of energy loss due to wave breaking in deep waters is explored. Moreover, the rationale behind existing methods and practical outcomes for estimation of whitecap coverage of the sea surface and energy dissipation rate are studied.


  • initial boundary value problems for surface waves


The propagation of surface waves due to initial surface disturbances induced by body impact are studied. Especially, the impact of asteroid on the sea surface, as well as the propagation and run-up of induced waves on coastal beach are under consideration.


  • modelling of circulation of groundwater due to wave action on permeable beach.


For tide-less seas, the groundwater flow in shallow water is totally controlled by the surface wave dynamics. Two types of models are distinguished, namely the phase-averaged models, with time scale of the order of hours, and the phase-resolving models with time scale of the order seconds. The phase-averaged models are of particular interest for studying the groundwater circulation due to wave set-up. Resulting mean pressure gradient, though small, produces dynamical effects that may be far-reaching in coastal zone. Developed mathematical models are compared with experimental data.






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Figure 1. Surface elevation due asteroid impact.


Figure 2. Averaged beach groundwater flow.




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Assoc. Prof. Paweł Schlichtholz    schlicht@iopan.gda.pl


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  • large-scale ocean dynamics.

  • climatic interactions in the Arctic.


He investigates these interesting topics by historical data analysis and process-oriented modeling. His recent studies has been focused on the dynamics of slope currents (East Greenland Current and Norwegian Atlantic Current/ West Spitsbergen Current system) and short-term climatic variability of water mass properties and circulation in the Arctic region in relation to atmospheric forcing (North Atlantic Oscillation).



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