Quantifying volume loss from ice cliffs on debris-covered glaciers using high-resolution terrestrial and aerial photogrammetry
ABSTRACT Mass losses originating from supraglacial ice cliffs at the lower tongues of debris-covered glaciers are a potentially large component of the mass balance, but have rarely been quantified. In this study, we develop a method to estimate ice cliff volume losses based on high-resolution topogr...
Published in: | Journal of Glaciology |
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Language: | English |
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Cambridge University Press (CUP)
2016
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Online Access: | http://dx.doi.org/10.1017/jog.2016.54 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S002214301600054X |
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crcambridgeupr:10.1017/jog.2016.54 2024-06-23T07:54:15+00:00 Quantifying volume loss from ice cliffs on debris-covered glaciers using high-resolution terrestrial and aerial photogrammetry BRUN, FANNY BURI, PASCAL MILES, EVAN S. WAGNON, PATRICK STEINER, JAKOB BERTHIER, ETIENNE RAGETTLI, SILVAN KRAAIJENBRINK, PHILIP IMMERZEEL, WALTER W. PELLICCIOTTI, FRANCESCA 2016 http://dx.doi.org/10.1017/jog.2016.54 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S002214301600054X en eng Cambridge University Press (CUP) http://creativecommons.org/licenses/by/4.0/ Journal of Glaciology volume 62, issue 234, page 684-695 ISSN 0022-1430 1727-5652 journal-article 2016 crcambridgeupr https://doi.org/10.1017/jog.2016.54 2024-06-12T04:02:36Z ABSTRACT Mass losses originating from supraglacial ice cliffs at the lower tongues of debris-covered glaciers are a potentially large component of the mass balance, but have rarely been quantified. In this study, we develop a method to estimate ice cliff volume losses based on high-resolution topographic data derived from terrestrial and aerial photogrammetry. We apply our method to six cliffs monitored in May and October 2013 and 2014 using four different topographic datasets collected over the debris-covered Lirung Glacier of the Nepalese Himalayas. During the monsoon, the cliff mean backwasting rate was relatively consistent in 2013 (3.8 ± 0.3 cm w.e. d −1 ) and more heterogeneous among cliffs in 2014 (3.1 ± 0.7 cm w.e. d −1 ), and the geometric variations between cliffs are larger. Their mean backwasting rate is significantly lower in winter (October 2013–May 2014), at 1.0 ± 0.3 cm w.e. d −1 . These results are consistent with estimates of cliff ablation from an energy-balance model developed in a previous study. The ice cliffs lose mass at rates six times higher than estimates of glacier-wide melt under debris, which seems to confirm that ice cliffs provide a large contribution to total glacier melt. Article in Journal/Newspaper Journal of Glaciology Cambridge University Press Journal of Glaciology 62 234 684 695 |
institution |
Open Polar |
collection |
Cambridge University Press |
op_collection_id |
crcambridgeupr |
language |
English |
description |
ABSTRACT Mass losses originating from supraglacial ice cliffs at the lower tongues of debris-covered glaciers are a potentially large component of the mass balance, but have rarely been quantified. In this study, we develop a method to estimate ice cliff volume losses based on high-resolution topographic data derived from terrestrial and aerial photogrammetry. We apply our method to six cliffs monitored in May and October 2013 and 2014 using four different topographic datasets collected over the debris-covered Lirung Glacier of the Nepalese Himalayas. During the monsoon, the cliff mean backwasting rate was relatively consistent in 2013 (3.8 ± 0.3 cm w.e. d −1 ) and more heterogeneous among cliffs in 2014 (3.1 ± 0.7 cm w.e. d −1 ), and the geometric variations between cliffs are larger. Their mean backwasting rate is significantly lower in winter (October 2013–May 2014), at 1.0 ± 0.3 cm w.e. d −1 . These results are consistent with estimates of cliff ablation from an energy-balance model developed in a previous study. The ice cliffs lose mass at rates six times higher than estimates of glacier-wide melt under debris, which seems to confirm that ice cliffs provide a large contribution to total glacier melt. |
format |
Article in Journal/Newspaper |
author |
BRUN, FANNY BURI, PASCAL MILES, EVAN S. WAGNON, PATRICK STEINER, JAKOB BERTHIER, ETIENNE RAGETTLI, SILVAN KRAAIJENBRINK, PHILIP IMMERZEEL, WALTER W. PELLICCIOTTI, FRANCESCA |
spellingShingle |
BRUN, FANNY BURI, PASCAL MILES, EVAN S. WAGNON, PATRICK STEINER, JAKOB BERTHIER, ETIENNE RAGETTLI, SILVAN KRAAIJENBRINK, PHILIP IMMERZEEL, WALTER W. PELLICCIOTTI, FRANCESCA Quantifying volume loss from ice cliffs on debris-covered glaciers using high-resolution terrestrial and aerial photogrammetry |
author_facet |
BRUN, FANNY BURI, PASCAL MILES, EVAN S. WAGNON, PATRICK STEINER, JAKOB BERTHIER, ETIENNE RAGETTLI, SILVAN KRAAIJENBRINK, PHILIP IMMERZEEL, WALTER W. PELLICCIOTTI, FRANCESCA |
author_sort |
BRUN, FANNY |
title |
Quantifying volume loss from ice cliffs on debris-covered glaciers using high-resolution terrestrial and aerial photogrammetry |
title_short |
Quantifying volume loss from ice cliffs on debris-covered glaciers using high-resolution terrestrial and aerial photogrammetry |
title_full |
Quantifying volume loss from ice cliffs on debris-covered glaciers using high-resolution terrestrial and aerial photogrammetry |
title_fullStr |
Quantifying volume loss from ice cliffs on debris-covered glaciers using high-resolution terrestrial and aerial photogrammetry |
title_full_unstemmed |
Quantifying volume loss from ice cliffs on debris-covered glaciers using high-resolution terrestrial and aerial photogrammetry |
title_sort |
quantifying volume loss from ice cliffs on debris-covered glaciers using high-resolution terrestrial and aerial photogrammetry |
publisher |
Cambridge University Press (CUP) |
publishDate |
2016 |
url |
http://dx.doi.org/10.1017/jog.2016.54 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S002214301600054X |
genre |
Journal of Glaciology |
genre_facet |
Journal of Glaciology |
op_source |
Journal of Glaciology volume 62, issue 234, page 684-695 ISSN 0022-1430 1727-5652 |
op_rights |
http://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.1017/jog.2016.54 |
container_title |
Journal of Glaciology |
container_volume |
62 |
container_issue |
234 |
container_start_page |
684 |
op_container_end_page |
695 |
_version_ |
1802646362245824512 |