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Model development and diagnostics

Coastal oceans are complex ecosystems. Their description requires an interdisciplinary approach. In addition to detailed measurements, realistic model simulations are necessary to understand the sophisticated interplay of all relevant processes. For this we develop advanced model techniques and diagnostics.

In the framework of the interdisciplinary research at IOW we develop and apply the coastal ocean model GETM as the backbone of a modular model system for high-resolution ecosystem simulations. We implement latest ESMF/NUOPC technologies to couple models for the ocean, atmosphere and waves.

One of the most challenging problems in ocean models is the numerical mixing of water masses. The systematic reduction of this spurious mixing demands for new numerical techniques and for reliable diagnostic methods to locate the hotspots of numerical mixing and to assess the developed techniques. In the recent years we established an analysis method to quantify numerical and physical mixing at model runtime. With this diagnostic method we could demonstrate the impact of different vertical coordinates and advection schemes on numerical mixing. The recently developed adaptive coordinates significantly reduce numerical mixing and ensure optimal vertical resolution even in dynamically different systems.

Publications and People

  1. Banerjee, T., S. Danilov, K. Klingbeil, J.-M. Campin (2024) Discrete variance decay analysis of spurious mixing. Ocean Modelling. 10.1016/j.ocemod.2024.102460.
  1. Banerjee, T., P. Scholz, S. Danilov, K. Klingbeil, D. Sidorenko (2024) Split-explicit external mode solver in finite volume sea ice ocean model FESOM2. Geoscientific Model Development. 10.5194/gmd-17-7051-2024.
  1. Li, X., E. Chrysagi, K. Klingbeil, H. Burchard (2024) Impact of islands on tidally dominated river plumes: a high-resolution modelling study. Journal of Geophysical Research (Oceans). 10.1029/2023JC020272.
  1. Schmitt, M., H. T. Pham, S. Sarkar, K. Klingbeil, L. Umlauf (2024) Diurnal Warm Layers in the ocean: Energetics, non-dimensional scaling, and parameterization. Journal of Physical Oceanography. 10.1175/JPO-D-23-0129.1.
  1. Klingbeil, K. and E. Henell (2023) A Rigorous Derivation of the Water Mass Transformation Framework, the Relation between Mixing and Diasurface Exchange Flow, and Links to Recent Theories in Estuarine Research. Journal of Physical Oceanography. 10.1175/JPO-D-23-0130.1.
  1. Henell, E., H. Burchard, U. Gräwe, K. Klingbeil (2023) Spatial composition of the diahaline overturning circulation in a fjord-type, non-tidal estuarine system. Journal of Geophysical Research (Oceans). 10.1029/2023JC019862.
  1. Reinert, M., M. Lorenz, K. Klingbeil, B. Büchmann, H. Burchard (2023) High-resolution simulations of the plume dynamics in an idealized 79°N Glacier cavity using adaptive vertical coordinates. Journal of Advances in Modeling Earth Systems. 10.1029/2023MS003721.
  1. Umlauf, L.,K. Klingbeil, H. Radtke, R. Schwefel, J. Bruggeman, P. Holtermann (2023) Hydrodynamic control of sediment-water fluxes: Consistent parameterization and impact in coupled benthic-pelagic models. Journal of Geophysical Research (Oceans). 10.1029/2023JC019651.
  1. Fofonova, V., T. Kärnä, K. Klingbeil, A. Androsov, I. Kuznetsov, D. Sidorenko, S. Danilov, H. Burchard, K. H. Wiltshire (2021) Plume spreading test case for coastal ocean models. Geoscientific Model Development Discuss.. 10.5194/gmd-2020-438.
  1. Li, Q., J. Bruggeman, H. Burchard, K. Klingbeil, L. Umlauf, K. Bolding (2021) Integrating CVMix into GOTM (v6.0): A consistent framework for testing, comparing, and applying ocean mixing schemes. Geoscientific Model Development. 10.5194/gmd-14-4261-2021.
  1. Lorenz, M., K. Klingbeil, H. Burchard (2021) Impact of evaporation and precipitation on estuarine mixing. Journal of Physical Oceanography. 10.1175/JPO-D-20-0158.1.
  1. Burchard, H., U. Gräwe, K. Klingbeil, N. Koganthi, X. Lange, M. Lorenz (2021) Effective diahaline diffusivities in estuaries. Journal of Advances in Modeling Earth Systems. 10.1029/2020MS002307.
  1. Bauer, T. P., K. Klingbeil, P. L. Holtermann, B. Heinold, H. Radtke, O. Knoth (2020) ICONGETM v1.0 -- Flexible two-way coupling via exchange grids between the unstructured-grid atmospheric model ICON and the structured-grid coastal ocean model GETM. Geoscientific Model Development Discuss.. 10.5194/gmd-2020-269.
  1. Lorenz, M., K. Klingbeil, H. Burchard (2020) Numerical study of the exchange flow of the Persian Gulf using an extended Total Exchange Flow analysis framework. Journal of Geophysical Research (Oceans). 10.1029/2019JC015527.
  1. Lorenz, M., K. Klingbeil, P. MacCready, H. Burchard (2019) Numerical issues of the Total Exchange Flow (TEF) analysis framework for quantifying estuarine circulation. Ocean Science. 10.5194/os-15-601-2019.
  1. Klingbeil, K., J. Becherer, E. Schulz, H. E. de Swart, H. M. Schuttelaars, A. Valle-Levinson, H. Burchard (2019) Thickness-Weighted Averaging in tidal estuaries and the vertical distribution of the Eulerian residual transport. Journal of Physical Oceanography. 10.1175/JPO-D-18-0083.1.
  1. Burchard, H., X. Lange, K. Klingbeil, P. MacCready (2019) Mixing estimates for estuaries. Journal of Physical Oceanography. 10.1175/JPO-D-18-0147.1.
  1. Lemarié, F., H. Burchard, L. Debreu, K. Klingbeil, J. Sainte-Marie (2019) Advancing dynamical cores of oceanic models across all scales. Bull. Amer. Meteor. Soc.. 10.1175/BAMS-D-18-0303.1.
  1. Klingbeil, K., F. Lemarié, L. Debreu, H. Burchard (2018) The numerics of hydrostatic structured-grid coastal ocean models: state of the art and future perspectives. Ocean Modelling. 10.1016/j.ocemod.2018.01.007.
  1. Lemmen, C., R. Hofmeister, K. Klingbeil, M. H. Nasermoaddeli, O. Kerimoglu, H. Burchard, F. Kösters, K. W. Wirtz (2018) Modular System for Shelves and Coasts (MOSSCO v1.0) – a flexible and multi-component framework for coupled coastal ocean ecosystem modelling. Geoscientific Model Development. 10.5194/gmd-11-915-2018.
  1. Mohammadi-Aragh, M., K. Klingbeil, N. Brüggemann, C. Eden, H. Burchard (2015) The impact of advection schemes on restratifiction due to lateral shear and baroclinic instabilities. Ocean Modelling. 10.1016/j.ocemod.2015.07.021.
  1. Gräwe, U., P. L. Holtermann, K. Klingbeil, H. Burchard (2015) Advantages of vertically adaptive coordinates in numerical models of stratified shelf seas. Ocean Modelling. 10.1016/j.ocemod.2015.05.008.
  1. Klingbeil, K., M. Mohammadi-Aragh, U. Gräwe, H. Burchard (2014) Quantification of spurious dissipation and mixing -- Discrete Variance Decay in a Finite-Volume framework. Ocean Modelling. 10.1016/j.ocemod.2014.06.001.
  1. Burchard, H., U. Gräwe, P. L. Holtermann, K. Klingbeil, L. Umlauf (2014) Turbulence Closure Modelling in Coastal Waters. Die Küste. 20.500.11970/101684.
  1. Klingbeil, K. and H. Burchard (2013) Implementation of a direct nonhydrostatic pressure gradient discretisation into a layered ocean model. Ocean Modelling. 10.1016/j.ocemod.2013.02.002.
  1. Moghimi, S., K. Klingbeil, U. Gräwe, H. Burchard (2013) A direct comparison of a depth-dependent Radiation stress formulation and a Vortex force formulation within a three-dimensional coastal ocean model. Ocean Modelling. 10.1016/j.ocemod.2012.10.002.

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