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RISMonitoring the Coupling-Update Frequency of a Limited-Area Model by Means of a Recursive Digital Filter
Publisher: American Meteorological Society
Abstract: In operational applications lateral-boundary coupling data are provided to one-way nested limited-area models with time intervals of more than an order of magnitude larger than the time step of the coupled model. In practice, ...
Scale-Selective Digital-Filtering Initialization
Publisher: American Meteorological Society
Abstract: Digital-filtering initialization (DFI) of atmospheric models relies on the fact that the gravity?inertia waves have higher frequencies than the meteorologically relevant rotational modes and assumes that a frequency exists ...
Model-Inspired Predictors for Model Output Statistics (MOS)
Publisher: American Meteorological Society
Abstract: This article addresses the problem of the choice of the predictors for the multiple linear regression in model output statistics. Rather than devising a selection procedure directly aimed at the minimization of the final ...
Alternative Formulations for Incorporating Lateral Boundary Data into Limited-Area Models
Publisher: American Meteorological Society
Abstract: Limited-area models (LAMs) use higher resolutions and more advanced parameterizations of physical processes than global numerical weather prediction models, but suffer from one additional source of error?the lateral boundary ...
A New Transport Index for Predicting Episodes of Extreme Air Pollution
Publisher: American Meteorological Society
Abstract: A new index that characterizes a typical length of horizontal and vertical transport is proposed to predict meteorological conditions that are unfavorable for the dispersion of air pollution. This index can be easily ...
Study of the Lateral Boundary Condition Temporal Resolution Problem and a Proposed Solution by Means of Boundary Error Restarts
Publisher: American Meteorological Society
Abstract: To properly utilize coupled limited-area models (LAMs), the time scales of the cross-boundary fluxes in the available lateral boundary data must be assessed. In current operational practice, the update frequencies of these ...
Application of Boyd’s Periodization and Relaxation Method in a Spectral Atmospheric Limited-Area Model. Part II: Accuracy Analysis and Detailed Study of the Operational Impact
Publisher: American Meteorological Society
Abstract: pectral limited-area models face a particular challenge at their lateral boundaries: the fields need to be made periodic. Boyd proposed a windowing-based method to improve the periodization and relaxation. In a companion ...
Application of Boyd’s Periodization and Relaxation Method in a Spectral Atmospheric Limited-Area Model. Part I: Implementation and Reproducibility Tests
Publisher: American Meteorological Society
Abstract: his paper describes the implementation of a proposal of Boyd for the periodization and relaxation of the fields in a full three-dimensional spectral semi-implicit semi-Lagrangian limited-area model structure of an atmospheric ...
Multiscale Performance of the ALARO-0 Model for Simulating Extreme Summer Precipitation Climatology in Belgium
Publisher: American Meteorological Society
Abstract: aily summer precipitation over Belgium from the Aire Limitée Adaptation Dynamique Développement International (ALADIN) model and a version of the model that has been updated with physical parameterizations, the so-called ...
Predicting Small-Scale, Short-Lived Downbursts: Case Study with the NWP Limited-Area ALARO Model for the Pukkelpop Thunderstorm
Publisher: American Meteorological Society
Abstract: he authors consider a thunderstorm event in 2011 during a music festival in Belgium that produced a short-lived downburst of a diameter of less than 100 m. This is far too small to be resolved by the kilometric resolutions ...