Ground thermal conditions at Chachani Volcano, Southern Peru
Shallow ground temperatures were measured and periglacial and permafrost environments identified at the Chachani volcanic complex in the west-central Andes in southern Peru (16° 11′ S; 71° 31′ W, elevation 6057 m a.s.l.). Three stations were installed at 4850, 4976 and 5331 m a.s.l. on the southern...
| Autores: | , , , |
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| Tipo de recurso: | artículo |
| Fecha de publicación: | 2011 |
| País: | España |
| Institución: | Universidad Complutense de Madrid (UCM) |
| Repositorio: | Docta Complutense |
| Idioma: | inglés |
| OAI Identifier: | oai:docta.ucm.es:20.500.14352/95839 |
| Acceso en línea: | https://hdl.handle.net/20.500.14352/95839 |
| Access Level: | acceso abierto |
| Palabra clave: | Chachani Volcano Ground frost conditions Permafrost Ciencias Sociales 54 Geografía |
| Sumario: | Shallow ground temperatures were measured and periglacial and permafrost environments identified at the Chachani volcanic complex in the west-central Andes in southern Peru (16° 11′ S; 71° 31′ W, elevation 6057 m a.s.l.). Three stations were installed at 4850, 4976 and 5331 m a.s.l. on the southern slope and the data were processed to produce ground temperature distribution models at depth and altitude. Snow cover lasts only a few days each year. Air and ground surface temperatures oscillate around 0°C almost daily, but the temperature is stabilized only a few centimetres below the ground surface. The lower limit of thermal conditions for isolated patches of permafrost occurs at 5050 m on the south-facing slopes. Thermal conditions associated with discontinuous permafrost occur from 5250 to 5420 m a.s.l., with continuous permafrost found above this level. The permafrost distribution models show that the rock glaciers observed on the southern slopes of the complex are within the active permafrost zone. |
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