Climatological analysis of precipitation on Mount Baldo (Italian Alps): 1879 - 2019. Part II: precipitation spatial distribution.
The spatial distributions of the average annual and seasonal rainfall on Mount Baldo massif, an interesting representative area in the south-eastern part of the Italian Alps, was built and compared to existing datasets. Data used derive from a total of 26 already homogenized long time series related to the period 1879 - 2019. In order to have a homogeneous starting dataset both yearly and for each season, we made a reasoning driven by the idea of reconstructing fictitious series where we noticed a difference between ancient and recent periods in precipitation. Particular attention was then paid to the vertical precipitation gradient, which is necessary to extrapolate data at higher altitudes, where no stations are available. Using the KED (Kriging with External Drift) interpolation method with elevation and geographic coordinates as auxiliary variables, spatial maps of annual and seasonal precipitation were built. We also compared precipitation spatial distribution belonging to old and recent periods and finally we compared our spatial annual maps to other existing datasets.