Projektbeschreibung
Den Ursprung und die Funktion der mesoskaligen Konvektion verstehen
Mesoskalige Konvektion nimmt oft die Form geordneter Muster an, die für einige Stunden andauern. Diese Systeme existieren nicht in größeren und kleineren Maßstäben und entwickeln sich auf unvorhersehbare Weise weiter. Sie stellen wichtige Unsicherheitsquellen in der Prognose des Klimawandels dar. In Klimamodellen, welche die langfristige Evolution der Erdatmosphäre beschreiben, werden diese Prozesse stark vereinfacht und als zusätzliche Wärmeströme beschrieben. Das EU-finanzierte Projekt MesoComp wird parallele Simulationen durchführen, um das Verständnis ihrer Dynamik, ihres Ursprungs und ihrer Funktion beim Transport von Wärme und Impuls zu vertiefen. Diese sehr originalgetreuen Simulationen werden das Design klassischer und quantenmechanischer Lernmodelle lenken, um die Entwicklung und Statistik der mesoskaligen Konvektion vorherzusagen und die Transportflüsse über die Mesoskala hinaus zu quantifizieren.
Ziel
Turbulent convection flows in nature display prominent patterns in the mesoscale range whose characteristic length in the horizontal directions exceeds the system scale height. Known as the turbulent superstructure of convection, they are absent on both larger and smaller scales and evolve in ways not yet understood; but they are an essential link in the heat and momentum transport to larger scales, an important driver of intermittent fluid motion at sub-mesoscales, and one major source of uncertainty in the prognosis of climate change and space weather. In MesoComp, I will investigate the formation of superstructures in massively parallel simulations of compressible turbulent convection in horizontally extended domains, aiming for a deeper understanding of their dynamical origin and role in the transport of heat and momentum. I will then use these high-fidelity simulations to build recurrent machine learning models to predict the evolution and statistics of the superstructure and thus quantify the transport fluxes beyond the mesoscale. I will also analyse the impact of the mesoscale structures on the highly intermittent statistics at the small-scale of the flow and reveal the resulting feedback in the form of improved subgrid parametrizations by means of generative machine learning. MesoComp opens additional doors to the application of quantum algorithms in machine learning which significantly improve the statistical sampling and data compression properties compared to their classical counterparts. From a longer-term perspective, my research results in a quantum advantage for the numerical analysis of classical turbulence, which accelerates the parametrizations of mesoscale convection and increases their fidelity. This work will finally lead to more precise predictions of the on-going climate change and global warming. The results will also improve solar activity models and thus solar storm prognoses with impacts on satellite communication and electrical grids.
Wissenschaftliches Gebiet
Not validated
Not validated
- natural sciencescomputer and information sciencesartificial intelligencemachine learningsupervised learning
- engineering and technologyelectrical engineering, electronic engineering, information engineeringelectrical engineeringpower engineeringelectric power distribution
- natural sciencesphysical sciencesquantum physics
- engineering and technologymechanical engineeringvehicle engineeringaerospace engineeringsatellite technology
- natural sciencesphysical sciencesclassical mechanicsfluid mechanicsfluid dynamicscomputational fluid dynamics
Programm/Programme
- HORIZON.1.1 - European Research Council (ERC) Main Programme
Thema/Themen
Finanzierungsplan
ERC - Support for frontier research (ERC)Gastgebende Einrichtung
98693 Ilmenau
Deutschland