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La estratificación impulsada por los remolinos inicia la primavera del Atlántico Norte, florece el fitoplancton
Amala Mahadevan1, Eric D'Asaro, Craig Lee
1Woods Hole Oceanographic Institution, Woods Hole, MA 02543, USA.
Science (New York, N.Y.)
|July 7, 2012
Resumen
La floración del fitoplancton en primavera es crucial para la exportación de carbono. Una nueva investigación muestra que los remolinos oceánicos, no solo el calentamiento, impulsan la estratificación temprana y las flores irregulares, avanzándolas por semanas.
Área de la Ciencia:
- Oceanografía La oceanografía es la oceanografía.
- Ecología marina Ecología marina.
- Biogeoquímica La biogeoquímica es la bioquímica.
Sus antecedentes:
- La floración del fitoplancton en primavera es vital para el ciclo del carbono oceánico.
- Las flores están tradicionalmente vinculadas al aumento de la luz y la estratificación de la superficie.
- La estratificación se atribuye comúnmente al calentamiento de la superficie del mar.
Objetivo del estudio:
- Para investigar los principales impulsores de la estratificación temprana de la temporada y las floraciones de fitoplancton en el Atlántico Norte.
- Desafiar la comprensión clásica de los mecanismos de iniciación de la floración.
Principales métodos:
- Se utilizaron datos de observación del Atlántico Norte subpolar.
- Empleó un modelo biofísico tridimensional para la simulación y el análisis.
Principales resultados:
- El descenso impulsado por los remolinos del gradiente de densidad norte-sur inicia la estratificación.
- Este proceso causa flores de fitoplancton más tempranas y irregulares.
- Las flores comienzan 20 a 30 días antes de lo previsto por el calentamiento solo.
Conclusiones:
- Los remolinos oceánicos juegan un papel crítico en el inicio de las flores de fitoplancton de primavera.
- Los hallazgos requieren una revisión de los modelos climáticos con respecto a la dinámica de la floración.
- El inicio temprano de la floración tiene implicaciones significativas para la exportación de carbono marino.
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