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Article

A Sensitivity Analysis with COSMO-LM at 1 km Resolution over South Italy

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Centro Italiano Ricerche Aerospaziali (CIRA) Via Maiorise, 81043 Capua (CE), Italy
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Fondazione Centro Euro-Mediterraneo sui Cambiamenti Climatici (CMCC) Via Maiorise, 81043 Capua (CE), Italy
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Hellenic National Meteorological Service (HNMS), 16777 Hellinikon, Greece
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Author to whom correspondence should be addressed.
Atmosphere 2020, 11(4), 430; https://doi.org/10.3390/atmos11040430
Received: 16 March 2020 / Revised: 17 April 2020 / Accepted: 21 April 2020 / Published: 23 April 2020
(This article belongs to the Section Meteorology)
The results of a sensitivity analysis based on COSMO-LM (COnsortium for Small-Scale MOdeling—Lokal Model) simulations driven by ECMWF-IFS (European Centre for Medium-Range Weather Forecasts—Integrated Forecasting System). global data over a domain located in southern Italy are presented. Simulations have been performed at very high resolution (about 1 km). The main aim of this study is to individuate the most sensitive physical and numerical parameters of the model configuration, comparing a set of 18 simulations in terms of temperature and precipitation against ground observations. The parameters that result in having more influence for a proper representation of temperature and precipitation fields are the heat resistance length of laminar layer (which accounts for the high complexity of the interaction of the atmosphere with the underlying surface) and the minimal diffusion coefficient for heat. Temperature values are strongly influenced also by the vertical variation of critical relative humidity. An optimized tuning of these parameters allows COSMO-LM to improve the representation of simulated main features of this area, with significant bias reductions. View Full-Text
Keywords: limited area models; high resolution; sensitivity study limited area models; high resolution; sensitivity study
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MDPI and ACS Style

Bucchignani, E.; Voudouri, A.; Mercogliano, P. A Sensitivity Analysis with COSMO-LM at 1 km Resolution over South Italy. Atmosphere 2020, 11, 430. https://doi.org/10.3390/atmos11040430

AMA Style

Bucchignani E, Voudouri A, Mercogliano P. A Sensitivity Analysis with COSMO-LM at 1 km Resolution over South Italy. Atmosphere. 2020; 11(4):430. https://doi.org/10.3390/atmos11040430

Chicago/Turabian Style

Bucchignani, Edoardo, Antigoni Voudouri, and Paola Mercogliano. 2020. "A Sensitivity Analysis with COSMO-LM at 1 km Resolution over South Italy" Atmosphere 11, no. 4: 430. https://doi.org/10.3390/atmos11040430

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