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Complejos paisajes mesoscalares bajo la Antártida mapeados desde el espacio
Helen Ockenden1,2, Robert G Bingham2, Daniel Goldberg2
1L'Institut des Géosciences de l'Environnement, Université Grenoble-Alpes, Saint-Martin-d'Hères, France.
Science (New York, N.Y.)
|January 15, 2026
Resumen
Este estudio mapea la topografía subglacial oculta de la Antártida utilizando la física del flujo de hielo y los datos satelitales. Revela formas detalladas del terreno debajo de la capa de hielo, mejorando nuestra comprensión de su historia y respuesta al cambio climático.
Área de la Ciencia:
- La geofísica
- Glaciología
- Detección remota
Sus antecedentes:
- El paisaje subglacial de la Antártida es crucial para entender la historia de las capas de hielo y la respuesta climática.
- El mapeo subglacial anterior se basó en datos geofísicos escasos, lo que condujo a sesgos espaciales.
- La topografía de la superficie de hielo refleja el lecho rocoso subyacente, ofreciendo un nuevo enfoque de mapeo.
Objetivo del estudio:
- Para crear un mapa de elevación a escala continental de la topografía subglacial de la Antártida.
- Para superar las limitaciones de los estudios geofísicos tradicionales para el mapeo subglacial.
- Para revelar formas de relieve subglaciales y geomorfología a mesoscala.
Principales métodos:
- Física del flujo de hielo aplicada a los mapas de elevación de la superficie de hielo por satélite de alta resolución.
- Observaciones geofísicas del espesor del hielo incorporadas.
- Generó un mapa de topografía subglacial a escala continental.
Principales resultados:
- Produjo un nuevo mapa de alta resolución de la topografía subglacial de la Antártida.
- Se han identificado formas de relieve subglaciales a mesoescala (2-30 km).
- Descubrió la distribución espacial de la rugosidad subglacial y la geomorfología.
Conclusiones:
- La topografía de la superficie de hielo derivada de satélites es una herramienta transformadora para el mapeo subglacial.
- El nuevo mapa mejora la comprensión de la geomorfología subglacial y su influencia en el flujo de hielo.
- Este trabajo proporciona una base para futuros estudios sobre las interacciones hielo-clima.
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