Articles | Volume 16, issue 11
https://doi.org/10.5194/tc-16-4659-2022
© Author(s) 2022. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/tc-16-4659-2022
© Author(s) 2022. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Research article
| 
04 Nov 2022
Research article |
| 04 Nov 2022
| 04 Nov 2022
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
Rubén Basantes-Serrano
CORRESPONDING AUTHOR
Grupo de Ciencias de la Tierra y Clima, Universidad Regional
Amazónica Ikiam, Tena, Ecuador
CAOS, Observatorio del Clima, Quito, Ecuador
Antoine Rabatel
Institut des Géosciences de l'Environnement (IGE, UMR 5001), Univ. Grenoble Alpes, CNRS, IRD, Grenoble INP, 38000 Grenoble, France
Bernard Francou
Institut des Géosciences de l'Environnement (IGE, UMR 5001), Univ. Grenoble Alpes, CNRS, IRD, Grenoble INP, 38000 Grenoble, France
Christian Vincent
Institut des Géosciences de l'Environnement (IGE, UMR 5001), Univ. Grenoble Alpes, CNRS, IRD, Grenoble INP, 38000 Grenoble, France
Alvaro Soruco
Instituto de Investigaciones Geológicas y del Medio Ambiente,
Universidad Mayor de San Andrés, La Paz, Bolivia
Thomas Condom
Institut des Géosciences de l'Environnement (IGE, UMR 5001), Univ. Grenoble Alpes, CNRS, IRD, Grenoble INP, 38000 Grenoble, France
Jean Carlo Ruíz
Institut des Géosciences de l'Environnement (IGE, UMR 5001), Univ. Grenoble Alpes, CNRS, IRD, Grenoble INP, 38000 Grenoble, France
UMR 7619 METIS, Sorbonne Université, Case 105, 4 place Jussieu,
75005 Paris, France
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Alpine glaciers are retreating at an accelerating rate in a warming climate. Numerical models allow us to study and anticipate these changes, but the performance of a model is difficult to evaluate. So we compared an ice flow model with the long dataset of observations obtained between 1979 and 2015 on Mer de Glace (Mont Blanc area). The model accurately reconstructs the past evolution of the glacier. We simulate the future evolution of Mer de Glace; it could retreat by 2 to 6 km by 2050.
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Short summary
We assessed the volume variation of 17 glaciers on the Antisana ice cap, near the Equator. We used aerial and satellite images for the period 1956–2016. We highlight very negative changes in 1956–1964 and 1979–1997 and slightly negative or even positive conditions in 1965–1978 and 1997–2016, the latter despite the recent increase in temperatures. Glaciers react according to regional climate variability, while local humidity and topography influence the specific behaviour of each glacier.
We assessed the volume variation of 17 glaciers on the Antisana ice cap, near the Equator. We...
