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Published on: September 30, 2019
Medición de los gradientes magnéticos fluctuantes originados por las ondas internas oceánicas
Resumen
Las corrientes eléctricas oceánicas generan gradientes magnéticos debido al movimiento del agua de mar. Las mediciones detectaron estos gradientes, correlacionándolos con el desplazamiento interno de las ondas utilizando un gradiómetro magnético superconductor.
Área de la Ciencia:
- La geofísica es la geofísica.
- Oceanografía La oceanografía es la oceanografía.
- El electromagnetismo es el electromagnetismo.
Sus antecedentes:
- El campo magnético de la Tierra interactúa con el agua de mar conductora.
- Los movimientos oceánicos, como las ondas internas, inducen corrientes eléctricas.
- Estas corrientes generan gradientes magnéticos fluctuantes medibles.
Objetivo del estudio:
- Para medir los gradientes magnéticos producidos por las corrientes eléctricas oceánicas.
- Para cuantificar la relación entre los gradientes magnéticos y el desplazamiento interno de las ondas.
- Investigar la viabilidad del uso de mediciones magnéticas para estudios oceanográficos.
Principales métodos:
- Utilizó un gradiómetro magnético superconductor colocado a 7 metros sobre la superficie del agua.
- Se llevaron a cabo mediciones en aguas de 18 metros de profundidad aproximadamente a 1,5 kilómetros de la costa de San Diego, California.
- Registran datos de gradiente magnético en frecuencias que van desde 2 a 5 millihertz.
Principales resultados:
- Los gradientes magnéticos medidos oscilan entre 0,3 y 0,6 picoteslas por metro por metro de desplazamiento interno de la onda.
- Confirmó la presencia de gradientes magnéticos fluctuantes vinculados al movimiento del agua de mar.
- Estableció una relación cuantificable entre el desplazamiento de las ondas y las variaciones del campo magnético.
Conclusiones:
- Los gradientes magnéticos fluctuantes son una consecuencia detectable de las corrientes eléctricas oceánicas.
- Los gradiómetros magnéticos superconductores son adecuados para medir estos sutiles fenómenos geofísicos.
- Este método ofrece potencial para la teledetección de las ondas y dinámicas oceánicas internas.
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