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Published on: November 7, 2016
Corrientes de turbidez: monitoreo de su aparición y movimiento con una red de sensores tridimensionales
Resumen
Las corrientes de turbidez, incluidos los tipos de oleaje y continuo, son frecuentes en los lagos glaciares. Los datos detallados de los sensores revelan sus patrones de flujo, dinámica y apoyan su papel en la erosión.
Área de la Ciencia:
- Geología Geología Geología.
- Ciencias del medio ambiente Ciencias del medio ambiente.
- La dinámica de fluidos es la dinámica de fluidos.
Sus antecedentes:
- Las corrientes de turbidez son cruciales en el transporte de sedimentos y la formación de paisajes submarinos.
- Comprender su dinámica es clave para interpretar los registros geológicos y gestionar los entornos acuáticos.
Objetivo del estudio:
- Para investigar la ocurrencia, los patrones de flujo y la dinámica interna de las corrientes de oleaje y de turbidez continua.
- Para analizar las características de estas corrientes utilizando tecnología avanzada de sensores.
- Determinar las condiciones bajo las cuales se forman las corrientes de turbidez y su potencial erosivo.
Principales métodos:
- Despliegue de una matriz tridimensional de sensores ópticos y térmicos en un lago glacial.
- Recopilación de datos de campo de alta resolución sobre las velocidades y propiedades de la corriente de turbidez.
- Análisis de datos para diferenciar entre eventos de corriente de oleada y turbidez continua.
Principales resultados:
- Las corrientes de turbidez ocurren con frecuencia, incluso con pequeñas diferencias de densidad (tan bajas como 0,19 kg/m3).
- Los eventos de oleada observados alcanzaron velocidades de 110 cm/s, mientras que los flujos inferiores continuos excedieron los 90 cm/s.
- Se documentaron diferencias claras en la iniciación y la dinámica interna de la oleada frente a los eventos continuos.
Conclusiones:
- Las corrientes de turbidez son fenómenos comunes en entornos de lagos glaciales.
- El estudio proporciona evidencia empírica que apoya la capacidad erosiva de las corrientes de turbidez.
- Los hallazgos mejoran la comprensión de los procesos de transporte de sedimentos en entornos lacustres y marinos.
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