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Reducciones en el ozono en altas concentraciones de halógenos estratosféricos
M J Prather1, M B McElroy, S C Wofsy
1Center for Earth and Planetary Physics, Harvard University, Cambridge, Massachusetts 02138, USA.
Nature
|November 15, 1984
Resumen
El aumento de los niveles de cloro inorgánico podría agotar significativamente el ozono estratosférico en más del 15%. Este agotamiento del ozono puede ocurrir a mediados de siglo con un aumento anual del 3% en las emisiones de clorocarburos, potencialmente empeorado por la liberación de bromocarburos.
Área de la Ciencia:
- Química de la atmósfera química de la atmósfera
- Ciencia de la estratosfera Ciencia de la estratosfera.
- Investigación de la capa de ozono Investigación de la capa de ozono.
Sus antecedentes:
- El equilibrio químico de la estratosfera es sensible a los compuestos reactivos de halógenos.
- El agotamiento de la capa de ozono plantea riesgos para la vida en la Tierra.
- Las emisiones antropogénicas introducen en la atmósfera sustancias que agotan la capa de ozono.
Objetivo del estudio:
- Para investigar el impacto potencial del aumento del cloro inorgánico en la química de la estratosfera inferior.
- Para cuantificar la reducción potencial en la densidad de la columna de ozono debido a las emisiones de clorocarburos.
- Evaluar el impacto adicional de la liberación de bromocarbono en los niveles de ozono.
Principales métodos:
- Modelado químico de la baja estratosfera.
- Proyección de la densidad de la columna de ozono bajo varios escenarios de emisiones.
- Análisis de las interacciones químicas de halógenos.
Principales resultados:
- Se predice un cambio significativo en la química de la estratosfera inferior con un alto nivel de cloro inorgánico.
- La densidad de la columna de ozono podría disminuir en más del 15% en condiciones específicas de emisión.
- La liberación industrial de bromocarbono podría exacerbar el agotamiento de la capa de ozono.
Conclusiones:
- El aumento de las concentraciones de cloro inorgánico representa una amenaza sustancial para la capa de ozono.
- El crecimiento proyectado de las emisiones de clorocarburos podría conducir a una pérdida significativa de ozono a mediados del siglo XXI.
- El efecto combinado de los clorocarburos y los bromocarburos podría afectar gravemente la recuperación del ozono estratosférico.
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