![]() For rain-gauges located from sea level up to 1000 m altitude, volume weighted values defined an isotopic gradient of −2.7‰/km, which is in the range observed in the Mediterranean area. Values ranged from −13.8 to+1.9‰, the lowest values being measured at higher altitudes and/or during cooler periods. Oxygen isotope composition was determined in rainwater samples collected for a period of 3 years (October 1997–October 2000), in 11 rain-gauges distributed along the flanks of Mt Etna from sea level to 2900 m of altitude. ![]() The spatial distribution shows favorable zones with regard to solar facilities in the provinces of Pinar del Río, Ciego de Ávila, Camaguey, the north coast of Las Tunas, Holguín and around the Gulf of Guacanayabo, and for wind generators at Pinar del Río, Artemisa, Ciego de Ávila, Camaguey, Las Tunas and the South coast of the Central and Eastern regions.Oxygen isotopes of both rainwater and groundwater samples from Mt Etna were used to obtain information on recharge areas, flow paths, and the origin of wet air masses. “Thunderstorms” are the most influencing phenomenon for wind facilities, with an unfavorable character. Overall it shows that phenomena under study have a greater incidence on solar than on wind facilities, since “clear skies”, “thunderstorms” and “precipitation” have a strong impact, favorable or unfavorable according to the specific phenomenon. The classification is given in five categories, ranging from “very unfavorable” to “very favorable”. ![]() The purpose of this work is to build an impact index that comprises the frequency of occurrence of these phenomena: “Clear Sky”, “fogs”, “Smoke”, “Haze”, “Mist”, “Precipitation”, “Shower” and “Thunderstorms”, weighted each one according to expert’s criteria, for 68 meteorological stations over Cuba and analyze the spatial distribution. Meteorological phenomena may have a positive or negative impact on solar and wind generating facilities.
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