Dynamical kernel of the Aladin-NH spectral limited-area model: Revised formulation and sensitivity experiments

摘要: Drawing from the results of theoretical studies about behaviour constant-coefficients semi-implicit schemes, dynamical kernel Aladin–NH spectral limited-area numerical weather prediction (NWP) model has been modified in order to allow for a stable and efficient integration fully elastic Euler equations. The resulting offers possibility use semi-Lagrangian transport schemes together with two-time-level discretizations at kilometric scales NWP purposes. main characteristics adiabatic part formulation space time discretization are described this article. In illustrate dependence on adjustable parameters kernel, some real-case dynamical-adaptation forecasts performed basic physical parameterization package presented. obtained experiments confirm conclusions drawn previous analysis studies. good quality is found be compatible routine exploitation framework. used operational ‘AROME’ since December 2008 scale, an appropriate data assimilation system. Copyright © 2010 Royal Meteorological Society Crown Copyright.