Melt and surface sublimation across a glacier in a dry environment: distributed energy-balance modelling of Juncal Norte Glacier, Chile

Author:

AYALA A.ORCID,PELLICCIOTTI F.,PELEG N.,BURLANDO P.

Abstract

ABSTRACTPrevious estimates of melt and surface sublimation on glaciers of the subtropical semiarid Andes (29–34°S) have been obtained at few specific locations, but it is not clear how ablation components vary across the entire extent of a glacier in this dry environment. Here, we simulate the distributed energy and mass balance of Juncal Norte Glacier (33°S) during a 2-month summer period. Forcing fields of near-surface air temperature and wind speed are generated using two methods accounting for the main physical processes that shape their spatial variations. Simulated meteorological variables and ablation agree well with observations on the glacier tongue and reveal complex patterns of energy and mass fluxes. Ablation decreases from 70 mm w.e. d−1 at the low-albedo glacier terminus (~3000 m), where almost 100% of total ablation corresponds to melt, to <5 mm w.e. d−1 at wind-exposed, strong-radiated sites above 5500 m, where surface sublimation represents >75% of total ablation. Our simulations provide the first glacier-scale estimates of ablation components on a glacier in the study region and better reproduce the observed and expected spatial variations of melt and surface sublimation, in comparison with more simple assumptions, such as linear gradients and uniform wind speeds.

Publisher

Cambridge University Press (CUP)

Subject

Earth-Surface Processes

Reference96 articles.

1. Influence of sublimation on stable isotope records recovered from high-altitude glaciers in the tropical Andes

2. Secular trend of the equilibrium-line altitude on the western side of the southern Andes, derived from radiosonde and surface observations

3. Calibration of a physically based, spatially distributed hydrological model in a glacierized basin: On the use of knowledge from glaciometeorological processes to constrain model parameters

4. Analysis of spatio-temporal changes in annual and seasonal precipitation variability in South America-Chile and related ocean-atmosphere circulation patterns;Valdés-Pineda;Int. J. Climatol.,2015

5. Onset Computer Corporation (2003) Hobo H8 Pro Series User's Manual 2. pp. http://www.onsetcomp.com/files/manual_pdfs/2869-JMAN-HO8-03x-08.pdf

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