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Gases traza atmosféricos: tendencias y distribuciones en la última década
Science (New York, N.Y.)
|June 27, 1986
Resumen
Las concentraciones atmosféricas de halocarbonos como F-11 y F-12 se duplicaron entre 1975 y 1985. Si bien su tasa de crecimiento se desaceleró debido a las prohibiciones, los aumentos continuados pueden calentar la Tierra y agotar la capa de ozono.
Área de la Ciencia:
- Química atmosférica y ciencias del clima.
- Monitoreo ambiental y análisis de gases traza.
Sus antecedentes:
- Los halocarburos, el metano y el óxido nitroso son gases de efecto invernadero significativos.
- Las décadas anteriores vieron aumentos rápidos en estos gases traza, lo que plantea preocupaciones ambientales.
Objetivo del estudio:
- Informar sobre las concentraciones de halocarbonos específicos y otros gases traza entre 1975 y 1985.
- Analizar las tendencias y las tasas de aumento de estos gases durante una década.
Principales métodos:
- Las mediciones de halocarbonos (F-11, F-12, CCl4), CH3) CCl3), metano (CH4) y óxido nitroso (N2) O).
- Datos recogidos en enero en el Polo Sur y el Noroeste del Pacífico.
- Análisis de las variaciones de concentración durante un período de diez años (1975-1985).
Principales resultados:
- Las concentraciones de F-11, F-12 y CH3 se han más que duplicado a nivel mundial en diez años.
- Las tasas anuales de aumento para F-11, F-12 y CH ((3) CCl ((3)) se desaceleraron en comparación con principios de la década.
- La desaceleración de las tasas de crecimiento se atribuye en parte a las prohibiciones de usos no esenciales de estos compuestos.
Conclusiones:
- A pesar de la desaceleración del crecimiento, los aumentos continuados en las concentraciones de gases traza plantean riesgos.
- Los impactos potenciales incluyen el calentamiento global y el agotamiento de la capa de ozono estratosférica.
- Estos cambios podrían conducir a cambios climáticos significativos y afectar a la habitabilidad global.
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