Articles | Volume 19, issue 2
https://doi.org/10.5194/tc-19-911-2025
https://doi.org/10.5194/tc-19-911-2025
Brief communication
 | 
26 Feb 2025
Brief communication |  | 26 Feb 2025

Brief communication: Potential of satellite optical imagery to monitor glacier surface flow velocity variability in the tropical Andes

Etienne Ducasse, Romain Millan, Jonas Kvist Andersen, and Antoine Rabatel

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Cited articles

Autin, P., Sicart, J. E., Rabatel, A., Soruco, A., and Hock, R.: Climate controls on the interseasonal and interannual variability of the surface mass and energy balances of a tropical glacier (Zongo Glacier, Bolivia, 16° S): new insights from the multi-year application of a distributed energy balance model, J. Geophys. Res.-Atmos., 127, e2021JD035410, https://doi.org/10.1029/2021JD035410, 2022. 
Basantes-Serrano, R., Rabatel, A., Francou, B., Vincent, C., Soruco, A., Condom, T., and Ruíz, J. C.: 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, The Cryosphere, 16, 4659–4677, https://doi.org/10.5194/tc-16-4659-2022, 2022. 
Cusicanqui, D., Lacroix, P., Bodin, X., Robson, B. A., Kääb, A., and MacDonell, S.: Detection and reconstruction of rock glaciers kinematic over 24 years (2000–2024) from Landsat imagery, EGUsphere [preprint], https://doi.org/10.5194/egusphere-2024-2393, 2024. 
Derkacheva, A., Mouginot, J., Millan, R., Maier, N., and Gillet-Chaulet, F.: Data reduction using statistical and regression approaches for ice velocity derived by Landsat-8, Sentinel-1 and Sentinel-2, Remote Sens.-Basel, 12, 1935, https://doi.org/10.3390/rs12121935, 2020. 
Ducasse, E., Millan, R., and Rabatel, A.: Annual glacier surface flow velocity product from Sentinel-2 data for some mountain ranges in the Tropical Andes, Recherche Data Gouv [data set], https://doi.org/10.57745/OJBTSE, 2024. 
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Short summary
Our study examines glacier movement in the tropical Andes from 2013 to 2022 using satellite data. Despite challenges like small glacier size and frequent cloud cover, we tracked annual speeds and seasonal changes. We found stable annual speeds but significant shifts between wet and dry seasons, likely due to changes in meltwater production and glacier–bedrock conditions. This research enhances understanding of how tropical glaciers react to climate change.
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