Snow Cover Temporal Dynamic Using MODIS Product, and Its Relationship with Precipitation and Temperature in the Tropical Andean Glaciers in the Alto Santa Sub-Basin (Peru)

The retreats of the planet’s tropical glaciers are natural indicators variation precipitation, temperature, and other variables. Alto Santa sub-basin sources freshwater storage for consumptive non-consumptive use different sectors. As a result climatic variations, it is essential to analyze dynamics snow cover area (SCA). methodology consisted processing 6578 MODIS Snow Cover MOD10A1 product images generating 18-year time series using Platform Google Earth Engine (GEE). Normalized Difference Index (NDSI) was used estimate extent cover, validate product, we same overlapping date Landsat 5 8 Surface Reflectance Tier 1, examine relationships between daily precipitation temperature. standardized correlation results gave good with stations over 4500 m.a.s.l., such as Artesonraju AP2 (4828 m.a.s.l.) −0.84 −0.74, These show coherent behaviors retreat due climatological In some years, there were anomalies in conduct three variables, but these originated from events weather phenomena. Regarding SCA 18 decreased 649 km2 311.6. 2000 2017, representing 41%; can conclude confirm that glacier imminent consequences climate change, which would affect security Peruvian Andes.