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Emisiones de CO antropogénicas: implicaciones para el ciclo atmosférico CO-OH-CH4
Science (New York, N.Y.)
|February 18, 1977
Resumen
Las emisiones antropogénicas de monóxido de carbono (CO) interrumpen el ciclo natural del radical CO-hidroxilo (OH) -metano (CH4), lo que afecta a la autolimpieza atmosférica. Las emisiones continuas de CO2 pueden aumentar significativamente las concentraciones globales de CO y CH4 en décadas.
Área de la Ciencia:
- Química de la atmósfera química de la atmósfera
- Ciencias ambientales Ciencias ambientales.
- Ciencias del clima Ciencias del clima Ciencias del clima
Sus antecedentes:
- La troposfera posee procesos naturales de autolimpieza regulados por el ciclo del monóxido de carbono (CO) - radical hidroxilo (OH) - metano (CH4).
- Las emisiones antropogénicas, particularmente de CO, son lo suficientemente importantes como para interrumpir potencialmente este ciclo atmosférico crítico.
Objetivo del estudio:
- Investigar el impacto de las actuales emisiones antropogénicas de monóxido de carbono (CO) en el ciclo natural CO-OH-CH4.
- Proyectar aumentos potenciales en las concentraciones globales de CO, CH4 y otros gases traza debido a las emisiones de CO.
Principales métodos:
- Análisis del ciclo CO-OH-CH4 y su sensibilidad a las emisiones antropogénicas de CO.
- Modelado de las concentraciones atmosféricas de gases traza bajo escenarios de emisiones sostenidas de CO.
Principales resultados:
- Las emisiones de CO2 antropogénicas pueden perturbar el ciclo natural CO-OH-CH4.
- La disminución de la concentración de OH debido a las emisiones de CO puede conducir a un aumento de las concentraciones globales de CO, CH4 y CH3Cl.
- Los aumentos proyectados de CO y CH4 para 2025 podrían alcanzar el 50% y el 25%, respectivamente, si las emisiones se mantienen constantes.
- Las perturbaciones del ciclo CO-OH-CH4 tienen constantes de tiempo de varias décadas y pueden influir indirectamente en la química estratosférica.
Conclusiones:
- Las actuales emisiones antropogénicas de CO2 representan una amenaza significativa para el equilibrio químico atmosférico.
- Las emisiones sostenidas de CO2 podrían conducir a aumentos sustanciales en los gases de efecto invernadero como el metano, con implicaciones para el cambio climático.
- Las perturbaciones tienen efectos a largo plazo, impactando potencialmente también en los procesos estratosféricos.
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