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Conference Papers Year : 2015

Extreme value modelling of some glacial processes in Chilean Andes

Abstract

A glacier is a solid ice mass which is fed by solid water (snow, hail or hoarfrost), transforms this solid water in ice and restores it via steam (evaporation/sublimation) or via liquid (water drained by the runoff stream). Such gain and loss of mass is analyzed as a balance (or budget). We will analyze Guanaco glacier which is located in the IV region of Chile (29°S) in the semi-arid Andes, the mass balance measured using the glaciological method in the period 2002-2014 will be analyzed. For statistical modelling we applied Hill and t-Hill estimators from parametrized family of Harmonic mean estimators.The expected dependencies are visible by increase of variance of t-Hill in comparison with Hill estimator. We aim to better understand underlying mechanisms, which can improve the interpretability of data.
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Dates and versions

hal-01168766 , version 1 (26-06-2015)

Identifiers

  • HAL Id : hal-01168766 , version 1

Cite

Stéphane Girard, Andres Rivera, Milan Stehlik, Sebastian Torres-Leiva. Extreme value modelling of some glacial processes in Chilean Andes. International Conference on Risk Analysis, May 2015, Barcelona, Spain. ⟨hal-01168766⟩
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