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Un gran sumidero de carbono terrestre en América del Norte implicado por los datos y modelos de dióxido de carbono
1S. Fan and J. Sarmiento, Atmospheric and Oceanic Sciences Program, Princeton University, Princeton, NJ 08544, USA. M. Gloor and S. Pacala, Department of Ecology and Evolutionary Biology, Princeton University, Princeton, NJ 08542, USA. J. Mahlm.
Science (New York, N.Y.)
|October 17, 1998
Resumen
Los ecosistemas terrestres globales absorbieron de 1,0 a 2,2 petagramos de carbono anualmente entre 1988 y 1992. América del Norte mostró una absorción significativa de dióxido de carbono, mientras que Eurasia y África tuvieron un intercambio neto mínimo.
Área de la Ciencia:
- Ciencias del Sistema Terrestre Ciencias del Sistema Terrestre
- Química de la atmósfera química de la atmósfera
- Ecología Ecología Ecología.
Sus antecedentes:
- Las concentraciones de dióxido de carbono atmosférico (CO2) han estado aumentando a nivel mundial.
- Comprender el sumidero de carbono terrestre es crucial para el modelado del cambio climático.
Objetivo del estudio:
- Para cuantificar la absorción global terrestre de dióxido de carbono.
- Para determinar la distribución espacial de este sumidero de carbono terrestre. para determinar la distribución espacial de este sumidero de carbono terrestre. para determinar la distribución espacial de este sumidero de carbono terrestre. para determinar la distribución espacial de este sumidero de carbono terrestre. para determinar la distribución espacial de este sumidero de carbono terrestre. para determinar la distribución espacial de este sumidero de carbono terrestre.
Principales métodos:
- Se utilizaron datos de CO2 atmosférico de 1988-1992.
- Empleó dos modelos de transporte atmosférico.
- Estimaciones incorporadas de las emisiones de combustibles fósiles y la absorción de CO2 oceánico.
Principales resultados:
- La absorción terrestre global se estimó en 1.0 a 2.2 petagramos de carbono por año (Pg C año-1).
- América del Norte exhibió una absorción significativa de 1,7 +/- 0,5 Pg C año-1.
- Eurasia-Norte de África mostró una absorción débil (0.1 +/- 0.6 Pg C año-1), y otras áreas terrestres fueron una fuente neta (0.2 +/- 0.9 Pg C año-1).
Conclusiones:
- Los ecosistemas terrestres juegan un papel vital en la mitigación del aumento del CO2 atmosférico.
- Existen variaciones regionales significativas en la efectividad del sumidero de carbono terrestre.
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