2 citations · 5 across the 14 of their papers we have counts for
15 papers
Prediction of steady states in a marine ecosystem model by a machine learning technique
Sarker Miraz Mahfuz, Thomas Slawig
We used precomputed steady states obtained by a spin-up for a global marine ecosystem model as training data to build a mapping from the small number of biogeochemical model parame…
A Micro-Macro parallel-in-time Implementation for the 2D Navier-Stokes Equations
Benedict Philippi, Mahfuz Sarker Miraz, Thomas Slawig
In this paper the Micro-Macro Parareal algorithm was adapted to PDEs. The parallel-in-time approach requires two meshes of different spatial resolution in order to compute approxim…
A Micro-Macro Parareal Implementation for the Ocean-Circulation Model FESOM2
B. Philippi, T. Slawig
A micro-macro variant of the parallel-in-time algorithm Parareal has been applied to the ocean-circulation and sea-ice model model FESOM2. The state-of-the-art software in climate…
The Parareal Algorithm Applied to the FESOM 2 Ocean Circulation Model
Benedict Philippi, Thomas Slawig
In this work the parallel-in-time algorithm Parareal was applied to the ocean-circulation and sea-ice model FESOM2 developed by the Alfred-Wegener Institut (AWI). The climate model…
Adaptive Time Step Algorithms for the Simulation of marine Ecosystem Models using the Transport Matrix Method Implementation Metos3D
Markus Pfeil, Thomas Slawig
The reduction of the computational effort is desirable for the simulation of marine ecosystem models. Using a marine ecosystem model, the assessment and the validation of annual pe…
Surrogate-based optimization using an artificial neural network for a parameter identification in a 3D marine ecosystem model
Markus Pfeil, Thomas Slawig
Parameter identification for marine ecosystem models is important for the assessment and validation of marine ecosystem models against observational data. The surrogate-based optim…
Unique steady annual cycle in marine ecosystem model simulations
Markus Pfeil, Thomas Slawig
Marine ecosystem models are an important tool to assess the role of the ocean biota in climate change and to identify relevant biogeochemical processes by validating the model outp…
Shortening the runtime using larger time steps for the simulation of marine ecosystem models
Markus Pfeil, Thomas Slawig
The reduction of computational costs for marine ecosystem models is important for the investigation and detection of the relevant biogeochemical processes because such models are c…
Simulation of scour around arbitrary offshore foundations based on the Volume-of-Fluid method combined with a Bingham model
Janek Meyer, Kai Graf, Thomas Slawig
This paper presents a method for the simulation of scour around arbitrary offshore structures. It is based on the solution of the Reynolds-Averaged-Navier-Stokes equations implemen…
Single precision arithmetic in ECHAM radiation reduces runtime and energy consumption
Alessandro Cotronei, Thomas Slawig
We converted the radiation part of the atmospheric model ECHAM to single precision arithmetic. We analyzed different conversion strategies and finally used a step by step change of…
A micro/macro parallel-in-time (parareal) algorithm applied to a climate model with discontinuous non-monotone coefficients and oscillatory forcing
Giovanni Samaey, Thomas Slawig
We present the application of a micro/macro parareal algorithm for a 1-D energy balance climate model with discontinuous and non-monotone coefficients and forcing terms. The micro/…
Mathematical analysis of the -- marine ecosystem model driven by 3-D ocean transport
Christina Roschat, Thomas Slawig
Marine ecosystem models are developed to understand and simulate the biogeochemical processes involved in marine ecosystems. Parekh, Follows and Boyle introduced the --$…
The Idea and Concept of Metos3D: A Marine Ecosystem Toolkit for Optimization and Simulation in 3D
Jaroslaw Piwonski, Thomas Slawig
The simulation and parameter optimization of coupled ocean circulation and ecosystem models in three space dimensions is one of the most challenging tasks in numerical climate rese…
Nontrivial Periodic Solutions of Marine Ecosystem Models of N-DOP type
Christina Roschat, Thomas Slawig
We investigate marine ecosystem models of N-DOP type with regard to nontrivial periodic solutions. The elements of this important, widely-used model class typically consist of two…
Mathematical analysis of a marine ecosystem model with nonlinear coupling terms and non-local boundary conditions
Christina Roschat, Thomas Slawig
We investigate the weak solvability of initial boundary value problems associated with an ecosystem model of the marine phosphorus cycle. The analysis covers the model equations th…