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Corriente de Florida: variabilidad de baja frecuencia observada con medidores de corriente amarrados durante abril de
Science (New York, N.Y.)
|January 18, 1985
Resumen
El volumen de transporte del Estrecho de Florida muestra patrones estacionales con fluctuaciones semanales significativas. El forzamiento atmosférico influye en estas variaciones de transporte, particularmente durante los meses de verano e invierno.
Área de la Ciencia:
- Oceanografía La oceanografía es la oceanografía.
- Dinámica de fluidos La dinámica de fluidos.
- Ciencias de la atmósfera Ciencias atmosféricas.
Sus antecedentes:
- La comprensión de las corrientes oceánicas es crucial para el clima y la predicción del tiempo.
- El Estrecho de Florida es una vía oceánica clave para el transporte de calor y masa.
Objetivo del estudio:
- Para cuantificar el volumen anual de transporte a través del estrecho de la Florida.
- Para investigar la variabilidad temporal y las fuerzas motrices de este transporte.
Principales métodos:
- Utilizó una serie de tiempo de 1 año de cinco amarres de medidores de corriente subterránea.
- Se empleó la extrapolación de cizallamiento constante para estimar las velocidades superficiales.
- Estimaciones de transporte validadas con respecto a las mediciones de cable submarino y Pegasus.
Principales resultados:
- El ciclo anual de transporte exhibió un máximo de verano y un mínimo de otoño-invierno.
- Las fluctuaciones de gran amplitud ocurrieron en escalas de tiempo de 1 a 3 semanas.
- Las fluctuaciones del transporte mostraron evidencia de forzamiento atmosférico, con períodos de coherencia específicos para el estrés del viento meridional.
Conclusiones:
- El transporte del Estrecho de Florida se caracteriza por ciclos estacionales y variabilidad a corto plazo.
- El forzamiento atmosférico juega un papel importante en la modulación de estas fluctuaciones de transporte.
- El espectro energético indica una distribución continua sin una brecha distinta entre las escalas semanales y estacionales.
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