Expedición 2022 Expediciones Ojos del Salado, Puna de Atacama download of data loggers (4200-6893 m asl) instrument change as required meltwater lake, stream-, and valley analyses (5000-6000 m asl) regolith sampling for sedimentary analyses from 4550 m asl Geomorfología Investigación de Permafrost Ojos del Salado