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Evaluación de las emisiones de metano de las observaciones espaciales globales.

C Frankenberg¹, J F Meirink, M van Weele

¹Institute of Environmental Physics, University of Heidelberg, INF 229, 69120 Heidelberg, Germany.

Science (New York, N.Y.)

|March 19, 2005

Resumen

Los niveles de metano atmosférico se han duplicado, contribuyendo significativamente al forzamiento climático. Nuevos datos satelitales revelan fuentes de metano subestimadas, particularmente en las selvas tropicales, mejorando nuestra comprensión del presupuesto global de metano.

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Área de la Ciencia:

Ciencias ambientales Ciencias ambientales.
Química de la atmósfera La química de la atmósfera
La detección remota con sensores.

Sus antecedentes:

El metano atmosférico se ha más que duplicado en dos siglos, comprendiendo el 20% del forzamiento climático antropogénico.
Las fuentes de metano no están bien cuantificadas, lo que lleva a incertidumbres en el presupuesto mundial de metano.

Objetivo del estudio:

Para recuperar la distribución global de metano utilizando la espectroscopia espacial. para recuperar la distribución global de metano utilizando la espectroscopia espacial. para recuperar la distribución global de metano utilizando la espectroscopia espacial. para recuperar la distribución global de metano utilizando la espectroscopia espacial.
Para identificar patrones a gran escala de las emisiones de metano y subestimaciones regionales.

Principales métodos:

Utilizó la espectroscopia de absorción del infrarrojo cercano en el espacio para analizar la distribución global de metano.
Investigaron las concentraciones de metano entre agosto y noviembre de 2003.

Principales resultados:

Se detectaron gradientes de metano latitudinales esperados y patrones de emisión a gran escala.
Se observaron concentraciones inesperadamente altas de metano en las selvas tropicales.
Se encontró que los inventarios de emisiones subestimaron significativamente las fuentes de metano en estas regiones.

Conclusiones:

Las observaciones por satélite proporcionan datos cruciales para refinar los presupuestos globales de metano.
Las selvas tropicales son una fuente más significativa de metano de lo que se estimaba anteriormente.
La mejora de la cuantificación de las fuentes de metano es esencial para la precisión de las evaluaciones de forzamiento climático.