Finite Elements Used in the Vertical Discretization of the Fully Compressible Core of the ALADIN System

Vivoda, Jozef; Smolíková, Petra; Simarro, Juan

doi:10.1175/mwr-d-18-0043.1

Cited by 7 publications

(5 citation statements)

References 20 publications

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“…This has been done in the finite difference discretization, but unfortunately, the C1 constraint is not guaranteed in the construction of the finite element operators. An iterative method was developed by (Vivoda and Smolíková 2013) in order to relax the C1 constraint. Based on this approach a theoretical development to solve the C1 constraint was proposed by Subias (2015), which has been tested in HARMONIE-AROME in cycle 40h1.1.…”

Section: A Dynamicsmentioning

confidence: 99%

The HARMONIE–AROME Model Configuration in the ALADIN–HIRLAM NWP System

Bengtsson

Andræ

Aspelien

et al. 2017

Monthly Weather Review

364

367

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The aim of this article is to describe the reference configuration of the convection-permitting numerical weather prediction (NWP) model HARMONIE-AROME, which is used for operational short-range weather forecasts in Denmark, Estonia, Finland, Iceland, Ireland, Lithuania, the Netherlands, Norway, Spain, and Sweden. It is developed, maintained, and validated as part of the shared ALADIN-HIRLAM system by a collaboration of 26 countries in Europe and northern Africa on short-range mesoscale NWP. HARMONIE-AROME is based on the model AROME developed within the ALADIN consortium. Along with the joint modeling framework, AROME was implemented and utilized in both northern and southern European conditions by the above listed countries, and this activity has led to extensive updates to the model's physical parameterizations. In this paper the authors present the differences in model dynamics and physical parameterizations compared with AROME, as well as important configuration choices of the reference, such as lateral boundary conditions, model levels, horizontal resolution, model time step, as well as topography, physiography, and aerosol databases used. Separate documentation will be provided for the atmospheric and surface data-assimilation algorithms and observation types used, as well as a separate description of the ensemble prediction system based on HARMONIE-AROME, which is called HarmonEPS.

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Section: A Dynamicsmentioning

confidence: 99%

The HARMONIE–AROME Model Configuration in the ALADIN–HIRLAM NWP System

Bengtsson

Andræ

Aspelien

et al. 2017

Monthly Weather Review

364

367

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“…The vertical discretization is based on finite differences (Simmons and Burridge, 1981) or finite elements. For the latter the implementation of B-splines of either linear or cubic order (Untch and Hortal, 2004) can be used in the hydrostatic case only, while in the nonhydrostatic case B-splines of general order are introduced according to Vivoda and Smolíková (2013). Unlike the hydrostatic case, in the ALADIN-NH dynamical core not only the integral operators but also the vertical derivatives need to be discretized since they appear in the set of basic equations.…”

Section: The Aladin-nh Nonhydrostatic Dynamical Corementioning

confidence: 99%

The ALADIN System and its canonical model configurations AROME CY41T1 and ALARO CY40T1

Termonia

Fischer²,

Bazile³

et al. 2018

Geosci. Model Dev.

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183

140

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Abstract. The ALADIN System is a numerical weather prediction (NWP) system developed by the international AL-ADIN consortium for operational weather forecasting and research purposes. It is based on a code that is shared with the global model IFS of the ECMWF and the ARPEGE model of Météo-France. Today, this system can be used to provide a multitude of high-resolution limited-area model (LAM) configurations. A few configurations are thoroughly validated and prepared to be used for the operational weather forecasting in the 16 partner institutes of this consortium. These configurations are called the ALADIN canonical model configurations (CMCs). There are currently three CMCs: the AL-ADIN baseline CMC, the AROME CMC and the ALARO CMC. Other configurations are possible for research, such as process studies and climate simulations.The purpose of this paper is (i) to define the ALADIN System in relation to the global counterparts IFS and ARPEGE, (ii) to explain the notion of the CMCs, (iii) to document their most recent versions, and (iv) to illustrate the process of the validation and the porting of these configurations to the operational forecast suites of the partner institutes of the AL-ADIN consortium. This paper is restricted to the forecast model only; data assimilation techniques and postprocessing techniques are part of the ALADIN System but they are not discussed here.

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“…In the HPE case, it uses cubic B-splines as basis functions (Untch and Hortal 2004). In the nonhydrostatic EE core, a more general scheme was introduced, enhancing accuracy to an arbitrary order (Vivoda and Smolíková 2013).…”

Section: Randd Highlightsmentioning

confidence: 99%

27 Years of Regional Cooperation for Limited Area Modelling in Central Europe

Wang

Belluš

Ehrlich

et al. 2018

Bulletin of the American Meteorological Society

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This paper describes 27 years of scientific and operational achievement of Regional Cooperation for Limited Area Modelling in Central Europe (RC LACE), which is supported by the national (hydro-) meteorological services of Austria, Croatia, the Czech Republic, Hungary, Romania, Slovakia, and Slovenia. The principal objectives of RC LACE are to 1) develop and operate the state-of-the-art limited-area model and data assimilation system in the member states and 2) conduct joint scientific and technical research to improve the quality of the forecasts. In the last 27 years, RC LACE has contributed to the limited-area Aire Limitée Adaptation Dynamique Développement International (ALADIN) system in the areas of preprocessing of observations, data assimilation, model dynamics, physical parameterizations, mesoscale and convection-permitting ensemble forecasting, and verification. It has developed strong collaborations with numerical weather prediction (NWP) consortia ALADIN, the High Resolution Limited Area Model (HIRLAM) group, and the European Centre for Medium-Range Weather Forecasts (ECMWF). RC LACE member states exchange their national observations in real time and operate a common system that provides member states with the preprocessed observations for data assimilation and verification. RC LACE runs operationally a common mesoscale ensemble system, ALADIN–Limited Area Ensemble Forecasting (ALADIN-LAEF), over all of Europe for early warning of severe weather. RC LACE has established an extensive regional scientific and technical collaboration in the field of operational NWP for weather research, forecasting, and applications. Its 27 years of experience have demonstrated the value of regional cooperation among small- and medium-sized countries for success in the development of a modern forecasting system, knowledge transfer, and capacity building.

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Finite Elements Used in the Vertical Discretization of the Fully Compressible Core of the ALADIN System

Cited by 7 publications

References 20 publications

The HARMONIE–AROME Model Configuration in the ALADIN–HIRLAM NWP System

The HARMONIE–AROME Model Configuration in the ALADIN–HIRLAM NWP System

The ALADIN System and its canonical model configurations AROME CY41T1 and ALARO CY40T1

27 Years of Regional Cooperation for Limited Area Modelling in Central Europe

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