Sensitivity of a distributed temperature-radiation index melt model based on AWS observations and surface energy balance fluxes, Hurd Peninsula glaciers, Livingston Island, Antarctica

Jonsell, Ulf and Navarro Valero, Francisco Jose and Bañón, Manolo and Lapazaran Izargain, Javier Jesús and Otero García, Jaime (2012). Sensitivity of a distributed temperature-radiation index melt model based on AWS observations and surface energy balance fluxes, Hurd Peninsula glaciers, Livingston Island, Antarctica. "The Cryosphere", v. 6 (n. 3); pp. 539-552. ISSN 1994-0416. https://doi.org/10.5194/tc-6-539-2012.

Description

Title: Sensitivity of a distributed temperature-radiation index melt model based on AWS observations and surface energy balance fluxes, Hurd Peninsula glaciers, Livingston Island, Antarctica
Author/s:
  • Jonsell, Ulf
  • Navarro Valero, Francisco Jose
  • Bañón, Manolo
  • Lapazaran Izargain, Javier Jesús
  • Otero García, Jaime
Item Type: Article
Título de Revista/Publicación: The Cryosphere
Date: 2012
ISSN: 1994-0416
Volume: 6
Subjects:
Faculty: E.T.S.I. Telecomunicación (UPM)
Department: Matemática Aplicada a las Tecnologías de la Información [hasta 2014]
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

We use an automatic weather station and surface mass balance dataset spanning four melt seasons collected on Hurd Peninsula Glaciers, South Shetland Islands, to investigate the point surface energy balance, to determine the absolute and relative contribution of the various energy fluxes acting on the glacier surface and to estimate the sensitivity of melt to ambient temperature changes. Long-wave incoming radiation is the main energy source for melt, while short-wave radiation is the most important flux controlling the variation of both seasonal and daily mean surface energy balance. Short-wave and long-wave radiation fluxes do, in general, balance each other, resulting in a high correspondence between daily mean net radiation flux and available melt energy flux. We calibrate a distributed melt model driven by air temperature and an expression for the incoming short-wave radiation. The model is calibrated with the data from one of the melt seasons and validated with the data of the three remaining seasons. The model results deviate at most 140 mm w.e. from the corresponding observations using the glaciological method. The model is very sensitive to changes in ambient temperature: a 0.5 ◦ C increase results in 56 % higher melt rates.

More information

Item ID: 14171
DC Identifier: http://oa.upm.es/14171/
OAI Identifier: oai:oa.upm.es:14171
DOI: 10.5194/tc-6-539-2012
Official URL: http://www.the-cryosphere.net/6/issue3.html
Deposited by: Memoria Investigacion
Deposited on: 19 Dec 2012 08:40
Last Modified: 21 Apr 2016 13:41
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