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Flexión del hielo forzada por paquetes de ondas internas en el océano Ártico
Science (New York, N.Y.)
|November 8, 1991
Resumen
Las olas internas en el Océano Ártico causaron una importante flexión del hielo, medida por tiltmeters y strainmeters. Este estudio cuantifica el hielo.
Área de la Ciencia:
- Oceanografía La oceanografía es la oceanografía.
- Investigación del Ártico Investigación del Ártico
- La geofísica es la geofísica.
Sus antecedentes:
- Las olas internas son importantes impulsores de la mezcla de los océanos y la transferencia de energía.
- La dinámica del hielo marino del Ártico es crucial para la regulación del clima.
- Se han observado agujeros internos diurnos cerca de la meseta de Yermak.
Objetivo del estudio:
- Para medir la flexión del hielo marino del Ártico.
- Para cuantificar el impacto de las olas internas en el hielo marino.
- Para correlacionar la flexión del hielo con las características de las olas.
Principales métodos:
- Despliegue de tiltmeters y strainmeters en el hielo marino del Ártico.
- Medición de la inclinación del hielo, la deformación, la velocidad vertical y el desplazamiento de la superficie.
- Comparación de las mediciones de hielo con el desplazamiento de la picnoclina subterránea y los datos actuales.
Principales resultados:
- Se registró una inclinación oscilatoria del hielo de 36 microradios.
- Esta inclinación correspondía a una velocidad vertical de la superficie de 16 micrómetros por segundo y un desplazamiento de la superficie de 3,5 mm.
- La tensión de hielo medida de 3 x 10 ((-7) indica una flexión, consistente con el forzamiento de las olas.
Conclusiones:
- Las ondas internas energéticas pueden inducir una flexión medible en el hielo marino del Ártico.
- La flexión del hielo observada es consistente con la dinámica de los agujeros internos.
- Esta investigación proporciona evidencia directa de la interacción entre las olas internas y el hielo marino.
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