Spiky ice and penitente tilting

Pablo Guilleminot, Rodrigo Olea

Resultado de la investigación: Conference article

Resumen

Under certain conditions, at high altitude, the surface of snow develops spike-like structures known as penitentes. This is a rather counterintuitive phenomenon, which is a consequence of surface sublimation at a given point as a result of the incidence of light scattered by the surrounding region. Following the existing literature, we model the time evolution of the phenomenon described above as a 1D diffusion equation with a non-local source term, as it represents the light coming from all the line of sight defined for a point of the curve. For small initial perturbations in the surface, the system undergoes a thermodynamic instability which triggers the formation of spikes. For sunlight coming in at a given angle, numerical simulations account for a feature observed in the real system: penitentes get tilted in the direction of the sunlight.

Idioma originalEnglish
Número de artículo012007
PublicaciónJournal of Physics: Conference Series
Volumen1043
N.º1
DOI
EstadoPublished - 25 jun 2018
Evento20th Chilean Physics Symposium - Santiago, Chile
Duración: 30 nov 20162 dic 2016

Huella dactilar

ice
sunlight
spikes
snow
high altitude
sublimation
line of sight
incidence
actuators
perturbation
thermodynamics
curves
simulation

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Citar esto

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abstract = "Under certain conditions, at high altitude, the surface of snow develops spike-like structures known as penitentes. This is a rather counterintuitive phenomenon, which is a consequence of surface sublimation at a given point as a result of the incidence of light scattered by the surrounding region. Following the existing literature, we model the time evolution of the phenomenon described above as a 1D diffusion equation with a non-local source term, as it represents the light coming from all the line of sight defined for a point of the curve. For small initial perturbations in the surface, the system undergoes a thermodynamic instability which triggers the formation of spikes. For sunlight coming in at a given angle, numerical simulations account for a feature observed in the real system: penitentes get tilted in the direction of the sunlight.",
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Spiky ice and penitente tilting. / Guilleminot, Pablo; Olea, Rodrigo.

En: Journal of Physics: Conference Series, Vol. 1043, N.º 1, 012007, 25.06.2018.

Resultado de la investigación: Conference article

TY - JOUR

T1 - Spiky ice and penitente tilting

AU - Guilleminot, Pablo

AU - Olea, Rodrigo

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AB - Under certain conditions, at high altitude, the surface of snow develops spike-like structures known as penitentes. This is a rather counterintuitive phenomenon, which is a consequence of surface sublimation at a given point as a result of the incidence of light scattered by the surrounding region. Following the existing literature, we model the time evolution of the phenomenon described above as a 1D diffusion equation with a non-local source term, as it represents the light coming from all the line of sight defined for a point of the curve. For small initial perturbations in the surface, the system undergoes a thermodynamic instability which triggers the formation of spikes. For sunlight coming in at a given angle, numerical simulations account for a feature observed in the real system: penitentes get tilted in the direction of the sunlight.

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