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Reducción inducida por la sequía en la producción primaria terrestre neta global desde 2000 hasta 2009
Maosheng Zhao1, Steven W Running
1Numerical Terradynamic Simulation Group, Department of Ecosystem and Conservation Sciences, the University of Montana, Missoula, MT 59812, USA. zhao@ntsg.umt.edu
Science (New York, N.Y.)
|August 21, 2010
Resumen
La producción primaria terrestre neta (PPN) mundial disminuyó entre 2000 y 2009 a pesar del calentamiento. Las sequías y el secado en el hemisferio sur contrarrestaron las ganancias del hemisferio norte, debilitando el sumidero de carbono terrestre.
Área de la Ciencia:
- Ecología Ecología Ecología.
- Ciencias del clima Ciencias del clima Ciencias del clima
- Biogeoquímica La biogeoquímica es la bioquímica.
Sus antecedentes:
- La producción primaria neta terrestre (PCN) mide la absorción de carbono atmosférico por las plantas.
- Investigaciones anteriores indicaron un aumento de la NPP desde 1982-1999 debido a las condiciones climáticas favorables.
- La década 2000-2009 fue la más cálida registrada.
Objetivo del estudio:
- Evaluar las tendencias mundiales de las centrales nucleares durante la década más cálida registrada (2000-2009).
- Identificar los factores que influyen en los cambios de las centrales nucleares a principios del siglo XXI.
Principales métodos:
- Análisis de las estimaciones globales de las NPP.
- Comparación de las tendencias de las centrales nucleares con los datos climáticos, incluida la temperatura, la radiación solar y los patrones de precipitación.
Principales resultados:
- La energía nuclear nuclear mundial disminuyó en 0,55 petagramos de carbono entre 2000 y 2009.
- Las sequías a gran escala redujeron significativamente las centrales nucleares regionales.
- Una tendencia de secado en el hemisferio sur disminuyó la energía nuclear, compensando las ganancias en el hemisferio norte.
Conclusiones:
- A pesar del calentamiento, la energía nuclear global disminuyó en la década de 2000, lo que indica un debilitamiento del sumidero de carbono terrestre.
- La continua disminución de las centrales nucleares podría exacerbar la competencia por recursos como alimentos y tierras para biocombustibles.
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