Auswirkung des Drucks auf die Temperatur- schichtung und Zirkulation von Seen
Projektleiter:
Finanzierung:
Societal Relevance: Providing the population with sufficient good quality water will be one of the great challenges in near future. Land use and climate change exacerbate this problem. We have only limited possibilities to create new water or transfer water in reservoirs seasonally to periods of shortage. Wise use and management of water resources appear as the most promising tools to alleviate the situation. Hence, numerical models have been adopted for lakes: the implementation of water properties however is still tied to ocean assumptions. As a consequence, simulated flows in the deep water of lakes close to temperature of maximum density (i.e. near 4°C) are flawed or entirely disconnected from reality. We have much better knowledge of the physical properties of lake waters. Numerical lake models could be substantially improved.
Scientific Challenge: Thermobaricity is controlling recirculation in deep lakes in the temperate and subpolar climate zone. Though the topic has gained interest recently in oceanography, the features in deep lakes have not been properly dealt with. By definition, the convenient property of potential density is lost, when thermobaric effects are dominant. This makes stability considerations difficult to display. However, we are convinced that the description of thermobaric effects can significantly be improved. We propose to start from basics of thermodynamic approaches to stability considerations to parsimonious modelling and will complete this research programme by the implementation of a proper inclusion of thermobaricity in numerical models to demonstrate the effects in some prominent cases. We hypothesize that an inclusion of thermobaricity in numerical models solves this issue and thermobaric effects are properly reflected.
Scientific Challenge: Thermobaricity is controlling recirculation in deep lakes in the temperate and subpolar climate zone. Though the topic has gained interest recently in oceanography, the features in deep lakes have not been properly dealt with. By definition, the convenient property of potential density is lost, when thermobaric effects are dominant. This makes stability considerations difficult to display. However, we are convinced that the description of thermobaric effects can significantly be improved. We propose to start from basics of thermodynamic approaches to stability considerations to parsimonious modelling and will complete this research programme by the implementation of a proper inclusion of thermobaricity in numerical models to demonstrate the effects in some prominent cases. We hypothesize that an inclusion of thermobaricity in numerical models solves this issue and thermobaric effects are properly reflected.
Kooperationen im Projekt
Kontakt
Prof. Dr. Thomas Richter
Otto-von-Guericke-Universität Magdeburg
Institut für Analysis und Numerik
Universitätsplatz 2
39106
Magdeburg
Tel.:+49 391 6758650
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