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Vórtices de larga vida como un modo de ventilación profunda en el mar de Groenlandia
Jean-Claude Gascard1, Andrew J Watson, Marie-José Messias
1Université Pierre et Marie Curie, Laboratoire d'Océanographie Dynamique et de Climatologie, 75252 Paris cedex 05, France. gascard@lodyc.jussieu.fr
Nature
|April 5, 2002
Resumen
Los remolinos convectivos profundos en el mar de Groenlandia juegan un papel crucial en la mezcla de los océanos. Estos vórtices de larga vida transportan las aguas atlánticas y polares a profundidades inferiores a los 500 metros, impactando en la formación de la densidad oceánica.
Área de la Ciencia:
- Oceanografía La oceanografía es la oceanografía.
- La oceanografía física es la oceanografía física.
- Oceanografía del Ártico Oceanografía del Ártico
Sus antecedentes:
- El mar de Groenlandia es un sitio clave para la convección de los océanos profundos, formando masas de agua densa.
- No se comprende completamente la contribución de los remolinos convectivos profundos al inicio y crecimiento de la convección.
Objetivo del estudio:
- Investigar el papel de los remolinos coherentes a escala submesoscala en la convección profunda dentro del mar de Groenlandia.
- Cuantificar la contribución de estos remolinos a la transformación y transporte de la masa de agua.
Principales métodos:
- Utilizó trazadores, flotadores y observaciones hidrográficas.
- Se analizaron datos de animales de larga vida (aprox. 1 año) y compacto (aprox. 5 km de diámetro del núcleo) vórtices que alcanzan profundidades de 2 km.
Principales resultados:
- Se han observado remolinos que se forman en invierno cerca del mar de Groenlandia.
- Los remolinos exhiben una rotación en el sentido de las agujas del reloj con períodos de unos pocos días.
- Los núcleos de Eddy son una mezcla de aguas atlánticas y polares modificadas, que alcanzan profundidades inferiores a 500 m.
Conclusiones:
- Los remolinos coherentes de submesoscala contribuyen significativamente a la mezcla de las aguas atlánticas y polares en el mar de Groenlandia central.
- Estos remolinos son vitales para comprender la entrada de masas de agua a profundidades intermedias.
- Los hallazgos mejoran las descripciones de los procesos de convección profunda en el mar de Groenlandia.
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