Spatiotemporal variations of alpine climate, snow cover and phenology

摘要: Understanding the relationships between vegetation phenology and its seasonal drivers under varying site conditions is of high interest in mountain areas, since alpine ecosystems are assumed to be particularly sensitive climatic changes. Through joint analysis NDVI, snow metrics, climate data at 250 m 2 km spatial resolution, respectively, we aim identifying their temporal variability statistical inter- intra-annual on an alpine-wide scale. Apart from clear patterns metrics related topography, a negative relationship mean March NDVI cover duration (SCD) preceding months was detected, indicating sensitivity green-up accumulation melt. In contrast, positive correlations early winter SCDs late summer indicate lagged water storage effect. On local scale South Tyrol, interacted with topography could explain average 30% variations late-October till late-May.