Estimation of the temperature in the bottom of the “Glaciar Norte” of the Citlaltepetl volcano, Mexico. Model to determine the presence of subglacial permafrost

The conditions of temperature and the “Glaciar Norte” ice conductivity in the Citlaltepetl volcano are studied with the aim to determinate its basal permafrost. From temperature records close to surface, the temperature average in internal steady-state of “Glaciar Norte” was estimated using a sinuso...

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Bibliographic Details
Published in:Estudios Geográficos
Main Authors: Soto Molina, Víctor Hugo, Delgado Granados, Hugo, Ontiveros González, Guillermo
Format: Article in Journal/Newspaper
Language:Spanish
Published: Consejo Superior de Investigaciones Científicas 2019
Subjects:
Ice
Online Access:https://estudiosgeograficos.revistas.csic.es/index.php/estudiosgeograficos/article/view/757
https://doi.org/10.3989/estgeogr.201936.016
Description
Summary:The conditions of temperature and the “Glaciar Norte” ice conductivity in the Citlaltepetl volcano are studied with the aim to determinate its basal permafrost. From temperature records close to surface, the temperature average in internal steady-state of “Glaciar Norte” was estimated using a sinusoidal method, which manage the thermal-conductive properties of ice. Through its temperature profile, an approach to the thermal conditions of Mexico´s main glacier was obtained. The results may suggest the existence of a basal permafrost, which would be due to the ice insulation and the thermal conduction by direct contact between ice and substratum. Se estudian las condiciones de temperatura y la conductividad del hielo del “Glaciar Norte” del volcán Citlaltépetl con el objeto de determinar la existencia de permafrost basal. A partir de registros de temperatura cercanos a la superficie se estimó la temperatura media en estado estacionario del interior del “Glaciar Norte” mediante un método sinusoidal que utiliza las propiedades termo-conductoras del hielo. A través de su perfil de temperatura se obtuvo una aproximación a las condiciones térmicas del principal glaciar de México. Los resultados podrían sugerir la existencia de un permafrost basal, el cual sería producto del aislamiento del hielo y de la conducción térmica por contacto directo entre el hielo y el substrato.