Priority Project "CELO"
COSMO-EULAG operationalization

Last updated: 12 Apr 2016

Project leader: Bogdan Rosa (IMGW-PIB)

Project resources

Project duration:

September 2012 to August 2018

Total FTEs used:

12.02

FTEs in COSMO
year (used):

2.4 in 2012-2013,
2.4 in 2013-2014,
2.4 in 2014-2015,
1.8 in 2015-2016,
1.35 in 2016-2017,
1.67 in 2017-2018

Introduction

The future very-high resolution COSMO model will require a robust and efficient dynamical core allowing for explicit representation of vigorous convective processes involving close coupling of dynamics and physics, as well as successful handling of steep mountain slopes. Such a core should represent also the basic conservative properties of natural flows.

Motivation

The Priority Project "Conservative Dynamical Core" (CDC) proved that the anelastic EULAG dynamical core (DC) has such basic abilities and is a good candidate for the dynamical core of the future operational COSMO model. According to the CDC plan, EULAG was successfully tested for a range of idealised and semi-realistic tests. The tests involved flows over realistic Alpine orographies with horizontal resolution up to 550 m and explicit representation of convection for idealised and semi-realistic Alpine simulations. The basic conservative characteristics of the EULAG DC result from its FV formulation and are documented in the literature.

The aim of the current project is to fully integrate EULAG with COSMO framework, consolidate and optimise the setup of the anelastic EULAG DC for the high-resolution NWP, optimize and tune the COSMO physical parameterizations, and test and exploit forecasting capabilities of the integrated model. The implementation of data assimilation is out of scope of the current project plan. However in the future, depending on available resources it can be implemented into the modified project plan or be executed separately in the frame of a CELO follow-up priority project.

Main deliverable

To deliver fully operational weather prediction package without data assimilation.

Project tasks

References

Abiodun, B.J., J.M. Prusa and W.J. Gutowski 2008  Implementation of a non-hydrostatic, adaptive-grid dynamic core in CAM3: Part I: comparison of dynamics cores in aqua-planet simulations, Clim. Dyn., 31, 795-810.
Abiodun, B.J., W.J. Gutowski, A.A. Abatan and J.M. Prusa 2011 CAM-EULAG: A Non-Hydrostatic Atmospheric Climate Model with Grid Stretching, Acta Geophys., 59, 1158-1167.
Grabowski W.W., and P.K. Smolarkiewicz 2002 A multiscale anelastic model for meteorological research, Month. Weather Rev., 130, 939-956.
Grinstein F.F., L.G. Margolin and W.J. Rider, Eds 2007 Implicit Large Eddy Simulation: Computing Turbulent Fluid Dynamics, Cambridge University Press. 552pp.
Grubisic V., and P.K. Smolarkiewicz 1997 The effect of critical levels on 3D Orographic Flows: Linear regime.J. Atmos. Sci., 54, 1943-1960.
Kurowski, M.J., B. Rosa and M.Z. Ziemianski 2011 Testing the Anelastic Nonhydro- static Model EULAG as a Prospective Dynamical Core of a Numerical Weather Prediction Model. Part II: Simulations of Supercell, Acta Geophys., 59, 1267-1293.
Malinowski, S.P., A.A. Wyszogrodzki and M.Z. Ziemianski 2011 Modeling Atmospheric Circulations with Sound-Proof Equations - PREFACE TO THE TOPICAL ISSUE, Acta Geophys., 59, 1073-1075
Meso-NH model documentation   http://mesonh.aero.obs-mip.fr/mesonh/doc.htm
Piotrowski, Z.P., M.J. Kurowski, B. Rosa and M.Z. Ziemianski 2009 EULAG model for multiscale flows - towards the petascale generation of mesoscale Numerical Weather Prediction, Parallel Processing and Applied Mathematics, Lecture Notes in Computer Science, Vol. 6068/2010, 380-387
Prusa J.M., and P.K. Smolarkiewicz 2003 An all-scale anelastic model for geophysical flows: dynamic grid deformation, J. Comput. Phys., 190, 601-622.
Prusa J.M., P.K. Smolarkiewicz, and A.A Wyszogrodzki 2008 EULAG, a computational model for multiscale flows, Comput. Fluids, 37, 1193-1207.
Rosa B., M.J. Kurowski and M.Z. Ziemianski 2011 Testing the Anelastic Nonhydrostatic Model EULAG as a Prospective Dynamical Core of a Numerical Weather Prediction Model. Part I: Dry Benchmarks, Acta Geophys., 59, 1235-1266.
Schar, C., D. Leuenberger, O. Fuhrer, D. Luthi and C. Girard 2002 A new terrain-following vertical coordinate formulation for atmospheric prediction models, Mon. Wea. Rev., 130, 2459-2480.
Smolarkiewicz P.K., and J.A. Pudykiewicz 1992 A class of semi-Lagrangian approximations for fluids, J. Atmos. Sci., 49, 2082-2096.
Smolarkiewicz P.K, and L.G. Margolin 1993 On forward-in-time differencing for fluids: extension to a curvilinear framework, Month. Weather Rev., 121, 1847-1859.
Smolarkiewicz, P.K., and L.G. Margolin 1994 Variational solver for elliptic problems in atmospheric flows, Appl. Math. Comp. Sci., 4, 527-551.
Smolarkiewicz P.K., and L.G. Margolin 2000 Variational methods for elliptic problems in fluid models, Proc. ECMWF Workshop on Developments in numerical methods for very high resolution global models 5-7 June 2000; Reading, UK, ECMWF, 137-159.
Smolarkiewicz P.K., L.G. Margolin and A.A Wyszogrodzki 2001 A class of nonhydrostatic global models, J. Atmos. Sci., 58, 349-364.
Smolarkiewicz, P.K., and J.M. Prusa 2002 Forward-in-Time Differencing for Fluids: Simulation of geophysical turbulence. Chapter 8 in Turbulent Flow Computation, Eds. D. Drikakis and B.J. Guertz, Kluwer Academic Publishers, pp 279-312.
Smolarkiewicz P.K., C. Temperton, S.J. Thomas and A.A. Wyszogrodzki 2004 Spectral Preconditioners for nonhydrostatic atmospheric models: extreme applications, Proceedings of the ECMWF Seminar Series on Recent developments in numerical methods for atmospheric and ocean modelling, Reading, UK, 203-220).
Smolarkiewicz P.K., and J. Szmelter 2005 MPDATA: An Edge-Based Unstructured-Grid Formulation, J. Comput. Phys., 206, 624-649.
Smolarkiewicz P.K. 2006 Multidimensional positive definite advection transport algorithm: an overview, Int. J. Numer. Meth. Fluids, 50, 1123-1144.
Smolarkiewicz P.K., R. Sharman, J. Weil, S.G. Perry, D. Heist and G. Bowker 2007 Building Resolving Large-Eddy Simulations and Comparison with Wind Tunnel Experiments. J. Comput. Phys., 227, 633-653.
Smolarkiewicz P.K., and A. Dornbrack 2008 Conservative integrals of adiabatic Durran's equations, Int. J. Numer. Meth. Fluids, 56, 1513-1519.
Szmelter, J. 2006 MPDATA Methods, special issue of Int. J. Num. Methods in Fluids, 50, pp. 173.
Thomas S.J., J.P. Hacker, P.K. Smolarkiewicz and R.B. Stull 2003 Spectral preconditioners for nonhydrostatic atmospheric models, Month. Weather Rev., 131, 2464-2478.
Wedi N.P., and P.K. Smolarkiewicz 2004 Extending Gal-Chen and Somerville terrain-following coordinate transformation on time-dependent curvilinear boundaries, J. Atmos. Sci., 193, 1-20
Ziemianski M.Z., M.J. Kurowski, Z.P. Piotrowski, B. Rosa and O. Fuhrer 2011 Toward very high horizontal resolution NWP over the alps: Influence of increasing model resolution on the flow pattern, Acta Geophys., 59, 1205-1235.