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El impacto de la erosión del suelo agrícola en el ciclo global del carbono
K Van Oost1, T A Quine, G Govers
1Physical and Regional Geography Research Group, Katholieke Universiteit Leuven, 3001 Heverlee, Belgium. kristof.vanoost@uclouvain.be
Science (New York, N.Y.)
|October 27, 2007
Resumen
La erosión del suelo agrícola actúa como un sumidero de carbono significativo, contrariamente a las creencias anteriores. Este estudio cuantifica el secuestro de carbono inducido por la erosión en las tierras agrícolas globales, impactando la investigación sobre el cambio climático.
Área de la Ciencia:
- Ciencias del medio ambiente Ciencias del medio ambiente.
- Ciencias del suelo Ciencias del suelo.
- Ciencias del clima Ciencias del clima Ciencias del clima
Sus antecedentes:
- Se debate el impacto de la erosión del suelo agrícola en el ciclo global del carbono, con estimaciones que varían ampliamente.
- Investigaciones anteriores no han establecido definitivamente si la erosión es una fuente neta o un sumidero de dióxido de carbono atmosférico (CO2).
Objetivo del estudio:
- Cuantificar el papel de la erosión del suelo agrícola como sumidero de carbono.
- Desafiar los supuestos existentes sobre el efecto neto de la erosión agrícola en los niveles de CO2 atmosférico.
Principales métodos:
- Utilizó mediciones de inventario de cesio-137 (137Cs) y carbono de una encuesta a gran escala.
- Aplicó estas mediciones para estimar el secuestro de carbono asociado con la erosión del suelo.
Principales resultados:
- Encontró evidencia consistente de un sumidero de carbono atmosférico inducido por la erosión.
- Cuantificó este sumidero como aproximadamente el 26% del carbono transportado por la erosión.
- Se estima un sumidero global de carbono de 0,12 petagramos de carbono por año de los paisajes agrícolas.
Conclusiones:
- La erosión del suelo agrícola representa un notable sumidero de carbono atmosférico.
- Los hallazgos desafían la visión predominante de la erosión agrícola como una fuente significativa o sumidero de CO2 atmosférico.
- Destaca la importancia de considerar el papel de la erosión en el secuestro de carbono para las estrategias de mitigación del cambio climático.
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