Variations in annual snowline and area of an ice-covered stratovolcano in the Cordillera Ampato, Peru, using remote sensing data (1986–2014)

Bijeesh Kozhikkodan Veettilab*, Ulisses Franz Bremerab, Sergio Florêncio de Souzaa, Éder Leandro Bayer Maierc & Jefferson Cardia Simõesba Centro Estadual de Pesquisas em Sensoriamento Remoto e Meteorologia (CEPSRM), Federal University of Rio Grande do Sul (UFRGS), Porto Alegre, Brazilb Centro Polar e Climático (CPC), Federal University of Rio Grande do Sul (UFRGS), Porto Alegre, Brazilc Institute of Social and Information Science, Federal University of Rio Grande (FURG), Rio Grande, Brazil