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Continúan las emisiones de metilcloroformo desde Europa
M C Krol1, J Lelieveld, D E Oram
1Institute for Marine and Atmospheric Research, Utrecht NL-3584 CC, The Netherlands. krol@phys.uu.nl
Nature
|January 10, 2003
Resumen
Las emisiones de metilcloroformo (1,1,1-tricloroetano) en Europa fueron más altas de lo esperado en 2000. Estas emisiones continuas de disolventes industriales tienen un impacto en las estimaciones de la concentración de radicales hidroxilo (OH).
Área de la Ciencia:
- Química de la atmósfera química de la atmósfera
- Ciencias del medio ambiente Ciencias del medio ambiente.
Sus antecedentes:
- El metilcloroformo (1,1,1-tricloroetano) es un disolvente industrial prohibido por el Protocolo de Montreal debido al agotamiento del ozono.
- Las emisiones globales disminuyeron significativamente en la década de 1990, con estimaciones cercanas a cero para Europa y los Estados Unidos desde 1999.
Objetivo del estudio:
- Para investigar las emisiones de metilcloroformo en Europa.
- Para evaluar el impacto de estas emisiones en las concentraciones estimadas de radicales hidroxilo (OH).
Principales métodos:
- Análisis de las mediciones de metilcloroformo.
- Utilizando un modelo de transporte trazador para estimar las emisiones europeas.
Principales resultados:
- Las emisiones europeas de metilcloroformo en el año 2000 superaron los 20 Gg.
- Estas emisiones, aunque no son significativas para el agotamiento de la capa de ozono, afectan a los cálculos de concentración de OH.
Conclusiones:
- Las emisiones continuas de metilcloroformo desafían los hallazgos recientes sobre las tendencias de OH y la abundancia hemisférica.
- Se necesitan más investigaciones sobre las emisiones de disolventes industriales para refinar los modelos atmosféricos.
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