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Teledetección: búsqueda de nuevas islas en el hielo marino
1Ørsted DTU, Technical University of Denmark, Ørsteds Plads B-348, 2800 Kgs Lyngby, Denmark. jm@oersted.dtu.dk
Nature
|March 8, 2002
Resumen
La interferometría de radar por satélite reveló que la isla Tobias es más grande de lo que se pensaba. Esta tecnología mapea efectivamente las islas cubiertas de hielo y puede ayudar a descubrir otras nuevas ocultas en el hielo marino del Ártico.
Área de la Ciencia:
- Las geociencias son ciencias geológicas.
- La detección remota con sensores.
- Investigación del Ártico Investigación del Ártico
Sus antecedentes:
- La isla de Tobías, descubierta en 1993 frente a la costa de Groenlandia, se informó inicialmente como un pequeño sistema de bancos.
- Su verdadero tamaño y extensión permanecieron en gran parte sin confirmar debido a su naturaleza remota y cubierta de hielo.
Objetivo del estudio:
- Para determinar con precisión el tamaño y la ubicación de la isla de Tobías.
- Evaluar la efectividad de la interferometría de radar por satélite para la detección y cartografía de islas árticas cubiertas de hielo.
- Para identificar posibles ubicaciones de islas no descubiertas en la región.
Principales métodos:
- Se empleó interferometría de radar por satélite (InSAR) para analizar la topografía de la isla.
- Los datos de escaneo láser en el aire se utilizaron para mediciones y validación complementarias.
- Se realizó un análisis geoespacial para identificar áreas estables para posibles nuevos descubrimientos de islas.
Principales resultados:
- Se descubrió que la isla Tobias era significativamente más grande de lo que se había informado anteriormente, con 2 km de longitud y 35 m de altura.
- El estudio identificó con éxito un área estable que indica la presencia potencial de un nuevo grupo de islas pequeñas.
- La interferometría de radar por satélite demostró ser eficaz tanto en el mapeo de la isla conocida como en la identificación de nuevas masas terrestres potenciales.
Conclusiones:
- La interferometría de radar por satélite es una herramienta poderosa y efectiva para descubrir y mapear islas cubiertas de hielo en regiones remotas del Ártico.
- Los hallazgos actualizan significativamente la comprensión de la morfología y la extensión de la isla Tobias.
- Esta metodología es prometedora para futuras iniciativas de exploración y cartografía del Ártico, lo que podría revelar islas ocultas.
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