Variation of the Snow Line Altitude in Huascaran System and its Relationship to EL NIÑO-SOUTH Oscilation during the Period 2001-2018.

The snow line altitude (SLA) is a reference of the altitude equilibrium line (ELA), this altitude is fundamental in the study of glaciers, it is related to the dynamic processes (advance and retreat) of ice masses, defines and separates the areas of ablation and accumulation in the glacial languages. It plays an important role that depends on the local climate. Huascaran System is located in the Peruvian Andes and its SLA is affected by events of El Niño-Southern Oscillation (ENSO). The objective of this work is to estimate the Variation of Snow Line Altitude (VSLA) in the Huascarán System and analyze its relationship to ENSO. The Digital Elevation Model (DEM), the Fractional Snow Cover (FSC) from Moderate Resolution Imaging Spectroradiometer (MODIS) and the Ocean Niño Index (ONI) are used. Data is processed and analyzed using filters and Wavelet analysis. The results showed a VSLA anomaly that occurs in period around of three years. This is clear evidence of how ENSO influences the System of Nevado Huascaran.