Tratamiento numérico por técnicas pseudoespectrales (elementos finitos) de la ecuación unidimensional de las ondas de gravedad

Presentamos un ejemplo sencillo en el que la técnica variacional de los elementos finitos (caso particular de modelo pseudoespectral) ha sido aplicada a la resolución de la ecuación unidimensional de las ondas de gravedad

Predicción del viento a escalas sub-kilométricas

Ponencia presentada en: XXXIII Jornadas Científicas de la AME y el XIV Encuentro Hispano Luso de Meteorología celebrado en Oviedo, del 7 al 9 de abril de 2014

Wind Forecasting Based on the HARMONIE Model and Adaptive Finite Elements

In this paper, we introduce a new method for wind field forecasting over complex terrain. The main idea is to use the predictions of the HARMONIE meso-scale model as the input data for an adaptive finite element mass-consistent wind model. The HARMONIE results (obtained with a maximum resolution of about 1 km) are refined in a local scale (about a few metres). An interface between both models is implemented in such a way that the initial wind field is obtained by a suitable interpolation of the HARMONIE results. Genetic algorithms are used to calibrate some parameters of the local wind field model in accordance to the HARMONIE data. In addition, measured data are considered to improve the reliability of the simulations. An automatic tetrahedral mesh generator, based on the meccano method, is applied to adapt the discretization to complex terrains. The main characteristic of the framework is a minimal user intervention. The final goal is to validate our model in several realistic applications on Gran Canaria island, Spain, with some experimental data obtained by the AEMET in their meteorological stations.This work has been supported by the Spanish Government, ‘‘Ministerio de Ciencia e Innovación’’, Grant Contracts: CGL2011-29396-C03-01 and CGL2011-29396-C03-02, and by ‘‘Junta de Castilla León’’, ‘‘Consejería de Educación’’, Grant Contract SA266A12-2

NWP Activities at the AEMET (Spain): 36th EWGLAM & 21th SRNWP Meetings

Póster presentado en: 36th EWGLAM & 21th SRNWP Meetings celebrado del 29 de septiembre al 2 de octubre de 2014 en Offenbach, Alemania

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

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 themodel’s physical parameterizations. In this paper the authors present the differences inmodel 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

HIRLAM-B

Seminario del Departamento de Desarrollo y Aplicaciones impartido en la sede central de AEMET el 6 de mayo de 201