Validation studies of turbulence closure schemes for high resolutions in mesoscale meteorological models

Castelli, Silvia; Hara, T.; Ohba, R.; Tremback, Craig J.

doi:10.1016/j.atmosenv.2005.12.028

Cited by 9 publications

(2 citation statements)

References 29 publications

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“…Consequently, the mixing of the tracer is much more effective in the case of the similarity approaches, which results in lower predicted concentrations. This relatively poor performance of the level-2.5 closure was also pointed out by Trini Castelli et al (2006), who compared turbulence closure models for different stability conditions in complex terrain, and attributed the TKE underestimation of the level-2.5 closure to its onedimensional approach. The PBL height difference is due to the fact that, in the case of the "SIM" and "SIM-ct" methods, the bulk Richardson number is used to determine the height of the PBL, while the "Direct" approach is inherently related to the TKE profile of the COSMO model itself.…”

Section: Initial Soil Moisturementioning

confidence: 86%

Simulation of Pollutant Transport in Complex Terrain with a Numerical Weather Prediction–Particle Dispersion Model Combination

Szintai

Kaufmann

Rotach

2010

Boundary-Layer Meteorol

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A new scaling approach, based on the convective velocity obtained from the sun-exposed eastern slopes and thus suited for steep and narrow Alpine valleys, is investigated with respect to pollutant dispersion. The capability of the new method is demonstrated with the operational emergency response system of MeteoSwiss, which consists of the COSMO (COnsortium for Small-scale MOdelling) numerical weather prediction model coupled with a Lagrangian particle dispersion model (LPDM). The new scaling approach is introduced to the interface between COSMO and LPDM, and is compared to results of a classical similarity theory approach and to the operational coupling type, which uses the turbulent kinetic energy (TKE) from the COSMO model directly. For the validation of the modelling system, the TRANSALP-89 tracer experiment is used, which was conducted in highly complex terrain in southern Switzerland. The ability of the COSMO model to simulate the valley wind system is assessed with several meteorological surface stations, and the dispersion simulation is evaluated with the measurements from 25 surface samplers. The sensitivity of the modelling system towards the soil moisture, horizontal grid resolution, and boundary-layer height determination is investigated, and it is shown that, if the flow field is correctly reproduced, the new scaling approach improves the tracer concentration simulation when compared to classical coupling methods.

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Section: Initial Soil Moisturementioning

confidence: 86%

Simulation of Pollutant Transport in Complex Terrain with a Numerical Weather Prediction–Particle Dispersion Model Combination

Szintai

Kaufmann

Rotach

2010

Boundary-Layer Meteorol

View full text Add to dashboard Cite

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“…For instance, Trini Castelli et al (2001; and Ferrero et al (2003) implemented and evaluated turbulence closure schemes of different orders in the Regional Atmospheric Modelling System (RAMS: Pielke et al, 1992), for simulation of both flow and dispersion in a case-study of a tracer experiment performed in a wind tunnel over a schematic two-dimensional valley. RAMS closures have been modified and tested also for simulations of circulation and dispersion in a complex terrain site on the Japanese coast (Trini Castelli et al, 2006;Hara et al, 2009) and in presence of obstacles over flat terrain . The turbulence parametrizations in the planetary boundary-layer scheme have been thoroughly assessed for the WRF mesoscale model (Weather Research and Forecasting: Skamarock and Klemp, 2008).…”

Section: Introductionmentioning

confidence: 99%

Evaluation of the turbulence parametrization in the MOLOCH meteorological model

Castelli

Bisignano

Donateo

et al. 2019

Quart J Royal Meteoro Soc

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An appropriate parametrization of turbulence is fundamental both in meteorological and atmospheric dispersion models, in order to properly simulate the dynamics of the flow and of the pollutants transported by it. The turbulence closure adopted in the meteorological model MOLOCH is presented, and its reliability and effectiveness are evaluated based on turbulent kinetic energy data measured at two suburban sites in north and south Italy. Very different topographical situations characterise the two sites, an Alpine and a coastal region, respectively. Particular attention is paid in assessing the low‐wind speed regime, a critical condition for air pollution, associated with turbulent features not yet fully understood. The analysis has proved that the turbulence closure in the MOLOCH model is able to capture and effectively reproduce the observed low‐level atmospheric turbulence processes, in all stability conditions.

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Development and Verification of a New Meteo-Dispersive Modelling System for Accidental Releases in the Italian Territory: SMART

Bisignano

Castelli

Malguzzi

2019

Springer Proceedings in Complexity

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Validation studies of turbulence closure schemes for high resolutions in mesoscale meteorological models

Cited by 9 publications

References 29 publications

Simulation of Pollutant Transport in Complex Terrain with a Numerical Weather Prediction–Particle Dispersion Model Combination

Simulation of Pollutant Transport in Complex Terrain with a Numerical Weather Prediction–Particle Dispersion Model Combination

Evaluation of the turbulence parametrization in the MOLOCH meteorological model

Development and Verification of a New Meteo-Dispersive Modelling System for Accidental Releases in the Italian Territory: SMART

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