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Design and Use of a Full Flow Sampling System (FFS) for the Quantification of Methane Emissions
Published on: June 12, 2016
Aumento continuo en todo el mundo del metano troposférico, 1978 a 1987
Science (New York, N.Y.)
|March 4, 1988
Resumen
Los niveles mundiales de metano aumentaron un 11% entre 1978 y 1987. Este aumento en el metano troposférico puede haber aumentado significativamente el vapor de agua estratosférico, impactando potencialmente la formación de nubes estratosféricas polares.
Área de la Ciencia:
- Química de la atmósfera La química de la atmósfera
- Ciencias del clima Ciencias del clima Ciencias del clima Ciencias del clima
Sus antecedentes:
- El metano es un potente gas de efecto invernadero con crecientes concentraciones atmosféricas.
- Los niveles de metano troposférico han mostrado una tendencia al alza significativa en las últimas décadas.
Objetivo del estudio:
- Analizar la tendencia de las proporciones globales de mezcla de metano troposférico desde 1978 hasta 1987.
- Para investigar el impacto potencial del aumento del metano en el vapor de agua estratosférico y la formación de nubes estratosféricas polares.
Principales métodos:
- Análisis de las mediciones globales de metano atmosférico.
- Evaluación estadística de las tasas de crecimiento del metano.
- Modelado de cambios potenciales de vapor de agua estratosférico.
Principales resultados:
- El promedio mundial de metano troposférico aumentó en un 11% (1.52 a 1.684 ppmv) desde 1978 hasta 1987.
- La tasa de crecimiento anual fue de aproximadamente 0,016 ppmv / año, con una posible ligera disminución en los últimos 5 años.
- No se detectó un impacto significativo de los eventos de El Niño-Oscilación Sur o El Chichón en el metano global.
Conclusiones:
- El aumento de las concentraciones de metano troposférico puede haber aumentado el vapor de agua estratosférico hasta en un 45% en dos siglos.
- Este aumento en el agua estratosférica podría mejorar la formación de nubes estratosféricas polares.
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