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WRF evaluation exercise using open sea in situ measurements

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#Modelli meteorologici

pubblicazioni - Articolo

WRF evaluation exercise using open sea in situ measurements

In particolare il lavoro riguarda la validazione del modello meteorologico WRF mediante l’utilizzo dei dati di boa forniti dall’istituto CNR-ISSIA di Genova

This work regards a model evaluation exercise concerning the WRF meteorological model and in situ measurements collected both over land, at four WMO meteorological stations, and over open sea, by ODAS Italia 1, the only spar buoy in the Mediterranean sea. In particular, this exercise is finalised to understand the skill of the model to act as meteorological pre-processor to simulate aerosol emissions from the sea, an important factor to correctly predict pollutant levels. The test is carried out for the August-December 2005 period over the Ligurian Sea region, a very complex area where the strong air-sea interactions and orography significantly affect the atmospheric circulation. Performances of two model versions, WRF-ARW 3.0 and WRF-ARW 3.2.1, applied at two different horizontal resolutions, have been compared. The results show that the new parameterizations introduced in WRF 3.2.1 improve the performance of the model with respect to version 3.2.0. Increasing the model domain resolution from 15 km to 5 km doesn’t generally improve the model performance, except for the wind direction reconstruction. The model proved its reliability as meteorological processor, although further effort are required to improve wind field simulation, mainly in order to reduce the low bias still affecting the reconstruction at high wind speed.

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#Modelli meteorologici

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