Snow depth spatial variability over Western Italian Alps using weather stations and modis satellite data. The seasonal snowfall characteristics over Piedmont during the last decade 2000-2010 were described interpolating the data from 111 weather stations through the kriging technique. Snow cover satellite data derived from the Moderate Resolution Imaging Spectroradiometer (MODIS) aggregated on monthly scale have been used in combination with the surface data to estimate the spatial variability of the snow depth. The procedure has been evaluated by cross-validation and compared with the snow fields obtained by interpolating only meteorological stations data. The results show that the use of satellite data improves the estimation of the spatial variability of meteorological variables with respect to the station-only method.
VARIABILITE SPATIALE DE LA NEIGE AU SOL SUR LES ALPES OCCIDENTALES ITALIÉNNES PAR STATIONS MÉTÉOROLOGIQUES ET DONNÉES SATELLITAIRES DE MODIS
TERZAGO, SILVIA;FRATIANNI, SIMONA
2012-01-01
Abstract
Snow depth spatial variability over Western Italian Alps using weather stations and modis satellite data. The seasonal snowfall characteristics over Piedmont during the last decade 2000-2010 were described interpolating the data from 111 weather stations through the kriging technique. Snow cover satellite data derived from the Moderate Resolution Imaging Spectroradiometer (MODIS) aggregated on monthly scale have been used in combination with the surface data to estimate the spatial variability of the snow depth. The procedure has been evaluated by cross-validation and compared with the snow fields obtained by interpolating only meteorological stations data. The results show that the use of satellite data improves the estimation of the spatial variability of meteorological variables with respect to the station-only method.
I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
