New insights into the decadal variability in glacier volume of a tropical ice cap, Antisana (0°29' S, 78°09' W), explained by the morpho-topographic and climatic context
International audience We present a comprehensive study of the evolution of the glaciers on the Antisana ice cap (tropical Andes) over the period 1956-2016. Based on geodetic observations of aerial photographs and high-resolution satellite images, we explore the effects of morpho-topographic and cli...
Published in: | The Cryosphere |
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Online Access: | https://insu.hal.science/insu-03859250 https://insu.hal.science/insu-03859250/document https://insu.hal.science/insu-03859250/file/tc-16-4659-2022.pdf https://doi.org/10.5194/tc-16-4659-2022 |
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ftunigrenoble:oai:HAL:insu-03859250v1 2024-05-19T07:41:56+00:00 New insights into the decadal variability in glacier volume of a tropical ice cap, Antisana (0°29' S, 78°09' W), explained by the morpho-topographic and climatic context Basantes-Serrano, Rubén Rabatel, Antoine Francou, Bernard Vincent, Christian Soruco, Alvaro Condom, Thomas Carlo Ruíz, Jean Institut des Géosciences de l’Environnement (IGE) Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP ) Université Grenoble Alpes (UGA) Milieux Environnementaux, Transferts et Interactions dans les hydrosystèmes et les Sols (METIS) École Pratique des Hautes Études (EPHE) Université Paris Sciences et Lettres (PSL)-Université Paris Sciences et Lettres (PSL)-Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS) 2022 https://insu.hal.science/insu-03859250 https://insu.hal.science/insu-03859250/document https://insu.hal.science/insu-03859250/file/tc-16-4659-2022.pdf https://doi.org/10.5194/tc-16-4659-2022 en eng HAL CCSD Copernicus info:eu-repo/semantics/altIdentifier/doi/10.5194/tc-16-4659-2022 insu-03859250 https://insu.hal.science/insu-03859250 https://insu.hal.science/insu-03859250/document https://insu.hal.science/insu-03859250/file/tc-16-4659-2022.pdf BIBCODE: 2022TCry.16.4659B doi:10.5194/tc-16-4659-2022 IRD: fdi:010086442 http://creativecommons.org/licenses/by/ info:eu-repo/semantics/OpenAccess ISSN: 1994-0424 EISSN: 1994-0416 The Cryosphere https://insu.hal.science/insu-03859250 The Cryosphere, 2022, 16, pp.4659-4677. ⟨10.5194/tc-16-4659-2022⟩ [SDU]Sciences of the Universe [physics] [SDU.STU.GL]Sciences of the Universe [physics]/Earth Sciences/Glaciology info:eu-repo/semantics/article Journal articles 2022 ftunigrenoble https://doi.org/10.5194/tc-16-4659-2022 2024-04-25T00:23:40Z International audience We present a comprehensive study of the evolution of the glaciers on the Antisana ice cap (tropical Andes) over the period 1956-2016. Based on geodetic observations of aerial photographs and high-resolution satellite images, we explore the effects of morpho-topographic and climate variables on glacier volumes. Contrasting behaviour was observed over the whole period, with two periods of strong mass loss, 1956-1964 (−0.72 m w.e. yr −1 ) and 1979-1997 (−0.82 m w.e. yr −1 ), and two periods with slight mass loss, 1965-1978 (0.10 m w.e. yr −1 ) and 1998-2016 (−0.26 m w.e. yr −1 ). There was a 42 % reduction in the total surface area of the ice cap. Individually, glacier responses were modulated by morpho-topographic variables (e.g. maximum and median altitude and surface area), particularly in the case of the small tongues located at low elevations (Glacier 1, 5 and 16) which have been undergoing accelerated disintegration since the 1990s and will likely disappear in the coming years. Moreover, thanks to the availability of aerial data, a surging event was detected on the Antisana Glacier 8 (G8) in the 2009-2011 period; such an event is extremely rare in this region and deserves a dedicated study. Despite the effect of the complex topography, glaciers have reacted in agreement with changes in climate forcing, with a stepwise transition towards warmer and alternating wet-dry conditions since the mid-1970s. Long-term decadal variability is consistent with the warm-cold conditions observed in the Pacific Ocean represented by the Southern Oscillation index. Article in Journal/Newspaper Ice cap The Cryosphere Université Grenoble Alpes: HAL The Cryosphere 16 11 4659 4677 |
institution |
Open Polar |
collection |
Université Grenoble Alpes: HAL |
op_collection_id |
ftunigrenoble |
language |
English |
topic |
[SDU]Sciences of the Universe [physics] [SDU.STU.GL]Sciences of the Universe [physics]/Earth Sciences/Glaciology |
spellingShingle |
[SDU]Sciences of the Universe [physics] [SDU.STU.GL]Sciences of the Universe [physics]/Earth Sciences/Glaciology Basantes-Serrano, Rubén Rabatel, Antoine Francou, Bernard Vincent, Christian Soruco, Alvaro Condom, Thomas Carlo Ruíz, Jean New insights into the decadal variability in glacier volume of a tropical ice cap, Antisana (0°29' S, 78°09' W), explained by the morpho-topographic and climatic context |
topic_facet |
[SDU]Sciences of the Universe [physics] [SDU.STU.GL]Sciences of the Universe [physics]/Earth Sciences/Glaciology |
description |
International audience We present a comprehensive study of the evolution of the glaciers on the Antisana ice cap (tropical Andes) over the period 1956-2016. Based on geodetic observations of aerial photographs and high-resolution satellite images, we explore the effects of morpho-topographic and climate variables on glacier volumes. Contrasting behaviour was observed over the whole period, with two periods of strong mass loss, 1956-1964 (−0.72 m w.e. yr −1 ) and 1979-1997 (−0.82 m w.e. yr −1 ), and two periods with slight mass loss, 1965-1978 (0.10 m w.e. yr −1 ) and 1998-2016 (−0.26 m w.e. yr −1 ). There was a 42 % reduction in the total surface area of the ice cap. Individually, glacier responses were modulated by morpho-topographic variables (e.g. maximum and median altitude and surface area), particularly in the case of the small tongues located at low elevations (Glacier 1, 5 and 16) which have been undergoing accelerated disintegration since the 1990s and will likely disappear in the coming years. Moreover, thanks to the availability of aerial data, a surging event was detected on the Antisana Glacier 8 (G8) in the 2009-2011 period; such an event is extremely rare in this region and deserves a dedicated study. Despite the effect of the complex topography, glaciers have reacted in agreement with changes in climate forcing, with a stepwise transition towards warmer and alternating wet-dry conditions since the mid-1970s. Long-term decadal variability is consistent with the warm-cold conditions observed in the Pacific Ocean represented by the Southern Oscillation index. |
author2 |
Institut des Géosciences de l’Environnement (IGE) Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP ) Université Grenoble Alpes (UGA) Milieux Environnementaux, Transferts et Interactions dans les hydrosystèmes et les Sols (METIS) École Pratique des Hautes Études (EPHE) Université Paris Sciences et Lettres (PSL)-Université Paris Sciences et Lettres (PSL)-Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS) |
format |
Article in Journal/Newspaper |
author |
Basantes-Serrano, Rubén Rabatel, Antoine Francou, Bernard Vincent, Christian Soruco, Alvaro Condom, Thomas Carlo Ruíz, Jean |
author_facet |
Basantes-Serrano, Rubén Rabatel, Antoine Francou, Bernard Vincent, Christian Soruco, Alvaro Condom, Thomas Carlo Ruíz, Jean |
author_sort |
Basantes-Serrano, Rubén |
title |
New insights into the decadal variability in glacier volume of a tropical ice cap, Antisana (0°29' S, 78°09' W), explained by the morpho-topographic and climatic context |
title_short |
New insights into the decadal variability in glacier volume of a tropical ice cap, Antisana (0°29' S, 78°09' W), explained by the morpho-topographic and climatic context |
title_full |
New insights into the decadal variability in glacier volume of a tropical ice cap, Antisana (0°29' S, 78°09' W), explained by the morpho-topographic and climatic context |
title_fullStr |
New insights into the decadal variability in glacier volume of a tropical ice cap, Antisana (0°29' S, 78°09' W), explained by the morpho-topographic and climatic context |
title_full_unstemmed |
New insights into the decadal variability in glacier volume of a tropical ice cap, Antisana (0°29' S, 78°09' W), explained by the morpho-topographic and climatic context |
title_sort |
new insights into the decadal variability in glacier volume of a tropical ice cap, antisana (0°29' s, 78°09' w), explained by the morpho-topographic and climatic context |
publisher |
HAL CCSD |
publishDate |
2022 |
url |
https://insu.hal.science/insu-03859250 https://insu.hal.science/insu-03859250/document https://insu.hal.science/insu-03859250/file/tc-16-4659-2022.pdf https://doi.org/10.5194/tc-16-4659-2022 |
genre |
Ice cap The Cryosphere |
genre_facet |
Ice cap The Cryosphere |
op_source |
ISSN: 1994-0424 EISSN: 1994-0416 The Cryosphere https://insu.hal.science/insu-03859250 The Cryosphere, 2022, 16, pp.4659-4677. ⟨10.5194/tc-16-4659-2022⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.5194/tc-16-4659-2022 insu-03859250 https://insu.hal.science/insu-03859250 https://insu.hal.science/insu-03859250/document https://insu.hal.science/insu-03859250/file/tc-16-4659-2022.pdf BIBCODE: 2022TCry.16.4659B doi:10.5194/tc-16-4659-2022 IRD: fdi:010086442 |
op_rights |
http://creativecommons.org/licenses/by/ info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.5194/tc-16-4659-2022 |
container_title |
The Cryosphere |
container_volume |
16 |
container_issue |
11 |
container_start_page |
4659 |
op_container_end_page |
4677 |
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1799481543429718016 |