Project Details
Projekt
Reactive transport
Applicants
Dr. Janek Greskowiak; Dr. Stephan Ludger Seibert
Subject Area
Hydrogeology, Hydrology, Limnology, Urban Water Management, Water Chemistry, Integrated Water Resources Management
Oceanography
Oceanography
Term
since 2021
Project identifier
Deutsche Forschungsgemeinschaft (DFG) - Project number 431491505
DynaDeep will unravel the functionality and relevance of marine-terrestrial interactions below high-energy beaches, where we propose the deep subsurface to act as a dynamic bioreactor and unique microbial habitat affecting element fluxes to the sea. Subproject P6 will support Phase 2 of the proposed research unit in its aims to (i) understand the complex processes in the deep subterranean estuary (STE) subject to highly transient boundary conditions, and (ii) quantify turnover of the elements C, N, P, and Fe within the world’s STEs and their fluxes to the global coastal oceans. For that, a principle biogeochemical model will be developed and verified against our core study site Spiekeroog, Germany, and two additional validation study sites Truc Vert, France, and De Panne, Belgium, respectively. A computationally efficient surrogate model (e.g., via multivariate regression or supervised machine learning techniques) will be constructed subsequently. Applying the surrogate model in concert with a global database of hydrogeological and biogeochemical site parameters, STE element fluxes for the entire global coastline will be computed, accounting for both present-day as well as projected climate data. The global database will be compiled in cooperation with subproject P7. Further, a Monte-Carlo-based uncertainty analysis on the computed global element fluxes will be carried out.
DFG Programme
Research Units
