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La rápida progresión de la acidificación de los océanos en el sistema de corrientes de California
Nicolas Gruber1, Claudine Hauri, Zouhair Lachkar
1Environmental Physics, Institute of Biogeochemistry and Pollutant Dynamics, ETH Zürich, Zürich, Switzerland. nicolas.gruber@env.ethz.ch
Science (New York, N.Y.)
|June 16, 2012
Resumen
La acidificación del océano está progresando rápidamente en el sistema de corrientes de California. Las aguas cercanas a la costa se enfrentan a la suba saturación durante todo el año para 2050, lo que amenaza los ecosistemas marinos.
Área de la Ciencia:
- Química marina La química marina es la química de los océanos.
- Oceanografía La oceanografía es la oceanografía.
- Los impactos del cambio climático impactos del cambio climático.
Sus antecedentes:
- El Sistema de Corriente de California (California CS) exhibe estados de baja saturación de carbonatos, lo que aumenta la vulnerabilidad a la acidificación de los océanos.
- Las condiciones actuales hacen que las aguas cercanas a la costa sean particularmente susceptibles a nuevas caídas en el pH y la saturación de carbonato.
Objetivo del estudio:
- Para investigar el desarrollo futuro de la acidificación del océano en el CS de California.
- Proyectar los impactos bajo diferentes escenarios de emisiones (A2 y B1) hasta 2050.
Principales métodos:
- Utilizó simulaciones de modelos de resolución de remolinos.
- Se analizaron los cambios proyectados en el estado de saturación de aragonita (Ωarag).
Principales resultados:
- Se prevé que el estado de saturación de la aragonita (Ωarag) disminuya rápidamente en los escenarios A2 y B1.
- Gran parte de la región costera experimentará una suba saturación de verano en 30 años.
- Para el año 2050, más de la mitad de las aguas estarán insaturadas durante todo el año, y los hábitats del fondo marino estarán expuestos a esta condición dentro de 20-30 años.
Conclusiones:
- La acidificación oceánica proyectada plantea amenazas significativas para el ecosistema de California CS.
- Las rápidas disminuciones en Ωarag indican un futuro crítico para la vida marina en esta región.
- Las estrategias de mitigación urgentes están implícitas en la gravedad de los cambios proyectados.
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