Data: Recent waning snowpack in the Alps is unprecedented in the last six centuries

<strong>Data_Dendro.txt</strong> contains the indexed ring-width chronology derived from living and relict common juniper (<em>Juniperus communis</em> L.) collected within or above the treeline in Ventina valley (46° 18’N, 9° 46’E). This data was used to reconstruct snowpack duration from 1400 to 2018 after calibration/validation with snow cover duration modelled from daily temperature and precipitation series. <strong>Data_SALP_Reconstruction.txt</strong> contains the snow cover duration ring-width reconstruction (SALP) spanning from 1400 to 2018. <strong>Data_Snow_cover_duration_south_Alps_1951_2018.txt</strong> contains the gridded 30’’ resolution snow cover duration over southern Alps for the period 1951-2018 as derived from a degree-day model applied to daily temperature and precipitation observations and calibrated on 312 snow depth observational series. This data was used to analyse the spatial signature of the indexed ring-width chronology. <strong>Data_Time_serie_snow_cover_duration_Ventina.txt</strong> contains the snow cover duration series (period 1834-2018) derived for the specific location of the site chronology, obtained with a degree-day model applied to daily temperature and precipitation observations and calibrated on snow depth observational series. These data were used to calibrate/validate the snow cover reconstruction based on the indexed ring-width chronology. They are documented in the following article: Carrer, M., Dibona, R., Prendin, A. L., Brunetti,M., 2022. Recent waning snowpack in the Alps is unprecedented in the last six centuries. Nature Climate Change.