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Kühnlein, Christian [VerfasserIn]; Deconinck, Willem [VerfasserIn]; Klein, Rupert [VerfasserIn]; Malardel, Sylvie [VerfasserIn]; Piotrowski, Zbigniew P. [VerfasserIn]; Smolarkiewicz, Piotr K. [VerfasserIn]; Szmelter, Joanna [VerfasserIn]; Wedi, Nils P. [VerfasserIn]

FVM 1.0: a nonhydrostatic finite-volume dynamical core for the IFS

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  • Medientyp: E-Artikel
  • Titel: FVM 1.0: a nonhydrostatic finite-volume dynamical core for the IFS
  • Beteiligte: Kühnlein, Christian [VerfasserIn]; Deconinck, Willem [VerfasserIn]; Klein, Rupert [VerfasserIn]; Malardel, Sylvie [VerfasserIn]; Piotrowski, Zbigniew P. [VerfasserIn]; Smolarkiewicz, Piotr K. [VerfasserIn]; Szmelter, Joanna [VerfasserIn]; Wedi, Nils P. [VerfasserIn]
  • Erschienen: Freie Universität Berlin: Refubium (FU Berlin), 2019
  • Sprache: Englisch
  • DOI: https://doi.org/10.17169/refubium-2877; https://doi.org/10.5194/gmd-12-651-2019
  • Schlagwörter: Integrated Forecasting System ; IFS ; global atmospheric model ; numerical weather prediction
  • Entstehung:
  • Anmerkungen: Diese Datenquelle enthält auch Bestandsnachweise, die nicht zu einem Volltext führen.
  • Beschreibung: We present a nonhydrostatic finite-volume global atmospheric model formulation for numerical weather prediction with the Integrated Forecasting System (IFS) at ECMWF and compare it to the established operational spectral-transform formulation. The novel Finite-Volume Module of the IFS (henceforth IFS-FVM) integrates the fully compressible equations using semi-implicit time stepping and non-oscillatory forward-in-time (NFT) Eulerian advection, whereas the spectral-transform IFS solves the hydrostatic primitive equations (optionally the fully compressible equations) using a semi-implicit semi-Lagrangian scheme. The IFS-FVM complements the spectral-transform counterpart by means of the finite-volume discretization with a local low-volume communication footprint, fully conservative and monotone advective transport, all-scale deep-atmosphere fully compressible equations in a generalized height-based vertical coordinate, and flexible horizontal meshes. Nevertheless, both the finite-volume and spectral-transform formulations can share the same quasi-uniform horizontal grid with co-located arrangement of variables, geospherical longitude–latitude coordinates, and physics parameterizations, thereby facilitating their comparison, coexistence, and combination in the IFS. We highlight the advanced semi-implicit NFT finite-volume integration of the fully compressible equations of IFS-FVM considering comprehensive moist-precipitating dynamics with coupling to the IFS cloud parameterization by means of a generic interface. These developments – including a new horizontal–vertical split NFT MPDATA advective transport scheme, variable time stepping, effective preconditioning of the elliptic Helmholtz solver in the semi-implicit scheme, and a computationally efficient implementation of the median-dual finite-volume approach – provide a basis for the efficacy of IFS-FVM and its application in global numerical weather prediction. Here, numerical experiments focus on relevant dry and moist-precipitating baroclinic instability at ...
  • Zugangsstatus: Freier Zugang
  • Rechte-/Nutzungshinweise: Namensnennung (CC BY)