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Los efectos de la fertilización del hierro en el secuestro de carbono en el Océano Austral
Ken O Buesseler1, John E Andrews, Steven M Pike
1Department of Marine Chemistry and Geochemistry, Woods Hole Oceanographic Institution, Woods Hole, MA 02543, USA. kbuesseler@whoi.edu
Science (New York, N.Y.)
|April 17, 2004
Resumen
La adición de hierro al Océano Austral aumentó la exportación de carbono, pero el efecto fue pequeño en comparación con las floraciones naturales y no fue significativo para los presupuestos globales de carbono o los esfuerzos de geoingeniería.
Área de la Ciencia:
- Oceanografía La oceanografía es la oceanografía.
- Ciencias del clima Ciencias del clima Ciencias del clima Ciencias del clima
- Biogeoquímica La biogeoquímica es la bioquímica.
Sus antecedentes:
- El impacto de la fertilización de hierro en el secuestro de carbono oceánico sigue siendo una cuestión clave en la ciencia del clima.
- Comprender el papel del Océano Antártico en el ciclo global del carbono es fundamental.
Objetivo del estudio:
- Para investigar si la alteración de la entrada de hierro en la superficie del océano afecta el flujo de carbono a las profundidades del océano.
- Para cuantificar el impacto de la fertilización de hierro en la exportación de partículas de carbono en el Océano Austral.
Principales métodos:
- Realizó el Experimento de Hierro del Océano Sur (SOFeX).
- Flujo de carbono de partículas medido desde la superficie de la capa mixta.
- Se analizó el ciclo de partículas por debajo del parche experimental.
Principales resultados:
- Se observó un aumento en el flujo de partículas de carbono después de la fertilización con hierro.
- Se detectaron alteraciones en el ciclo de partículas debajo del área fertilizada.
- La magnitud del flujo de carbono fue comparable a las floraciones naturales del Océano Sur.
Conclusiones:
- La fertilización de hierro puede mejorar la exportación de carbono, pero su impacto es modesto.
- El flujo de carbono observado es insuficiente para un significativo secuestro global de carbono o geoingeniería a gran escala.
- Se necesita más investigación para comprender completamente el papel del hierro en el ciclo del carbono oceánico.
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