Melt and surface sublimation across a glacier in a dry environment: distributed energy-balance modelling of Juncal Norte Glacier, Chile
Previous 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 e...
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Cambridge University Press
2017
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ftdoajarticles:oai:doaj.org/article:4daa3545347640d6a5663c273a6766bf 2023-05-15T16:57:35+02:00 Melt and surface sublimation across a glacier in a dry environment: distributed energy-balance modelling of Juncal Norte Glacier, Chile A. AYALA F. PELLICCIOTTI N. PELEG P. BURLANDO 2017-10-01T00:00:00Z https://doi.org/10.1017/jog.2017.46 https://doaj.org/article/4daa3545347640d6a5663c273a6766bf EN eng Cambridge University Press https://www.cambridge.org/core/product/identifier/S0022143017000466/type/journal_article https://doaj.org/toc/0022-1430 https://doaj.org/toc/1727-5652 doi:10.1017/jog.2017.46 0022-1430 1727-5652 https://doaj.org/article/4daa3545347640d6a5663c273a6766bf Journal of Glaciology, Vol 63, Pp 803-822 (2017) energy balance glacier meteorology glacier surface melt mountain glaciers snow/ice surface processes Environmental sciences GE1-350 Meteorology. Climatology QC851-999 article 2017 ftdoajarticles https://doi.org/10.1017/jog.2017.46 2023-03-12T01:30:59Z Previous 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. Article in Journal/Newspaper Journal of Glaciology Directory of Open Access Journals: DOAJ Articles Juncal ENVELOPE(-56.483,-56.483,-62.967,-62.967) Journal of Glaciology 63 241 803 822 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
energy balance glacier meteorology glacier surface melt mountain glaciers snow/ice surface processes Environmental sciences GE1-350 Meteorology. Climatology QC851-999 |
spellingShingle |
energy balance glacier meteorology glacier surface melt mountain glaciers snow/ice surface processes Environmental sciences GE1-350 Meteorology. Climatology QC851-999 A. AYALA F. PELLICCIOTTI N. PELEG P. BURLANDO Melt and surface sublimation across a glacier in a dry environment: distributed energy-balance modelling of Juncal Norte Glacier, Chile |
topic_facet |
energy balance glacier meteorology glacier surface melt mountain glaciers snow/ice surface processes Environmental sciences GE1-350 Meteorology. Climatology QC851-999 |
description |
Previous 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. |
format |
Article in Journal/Newspaper |
author |
A. AYALA F. PELLICCIOTTI N. PELEG P. BURLANDO |
author_facet |
A. AYALA F. PELLICCIOTTI N. PELEG P. BURLANDO |
author_sort |
A. AYALA |
title |
Melt and surface sublimation across a glacier in a dry environment: distributed energy-balance modelling of Juncal Norte Glacier, Chile |
title_short |
Melt and surface sublimation across a glacier in a dry environment: distributed energy-balance modelling of Juncal Norte Glacier, Chile |
title_full |
Melt and surface sublimation across a glacier in a dry environment: distributed energy-balance modelling of Juncal Norte Glacier, Chile |
title_fullStr |
Melt and surface sublimation across a glacier in a dry environment: distributed energy-balance modelling of Juncal Norte Glacier, Chile |
title_full_unstemmed |
Melt and surface sublimation across a glacier in a dry environment: distributed energy-balance modelling of Juncal Norte Glacier, Chile |
title_sort |
melt and surface sublimation across a glacier in a dry environment: distributed energy-balance modelling of juncal norte glacier, chile |
publisher |
Cambridge University Press |
publishDate |
2017 |
url |
https://doi.org/10.1017/jog.2017.46 https://doaj.org/article/4daa3545347640d6a5663c273a6766bf |
long_lat |
ENVELOPE(-56.483,-56.483,-62.967,-62.967) |
geographic |
Juncal |
geographic_facet |
Juncal |
genre |
Journal of Glaciology |
genre_facet |
Journal of Glaciology |
op_source |
Journal of Glaciology, Vol 63, Pp 803-822 (2017) |
op_relation |
https://www.cambridge.org/core/product/identifier/S0022143017000466/type/journal_article https://doaj.org/toc/0022-1430 https://doaj.org/toc/1727-5652 doi:10.1017/jog.2017.46 0022-1430 1727-5652 https://doaj.org/article/4daa3545347640d6a5663c273a6766bf |
op_doi |
https://doi.org/10.1017/jog.2017.46 |
container_title |
Journal of Glaciology |
container_volume |
63 |
container_issue |
241 |
container_start_page |
803 |
op_container_end_page |
822 |
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1766049149418995712 |