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Pyrocumulonimbus afecta a la composición promedio de los aerosoles en la estratosfera

J M Katich^1,2, E C Apel³, I Bourgeois^1,2

¹National Oceanic and Atmospheric Administration (NOAA) Chemical Sciences Laboratory (CSL), Boulder, CO, USA.

Science (New York, N.Y.)

|February 23, 2023

Resumen

Las nubes de pirocumulonimbus (pyroCb) generadas por los incendios forestales inyectan humo en la estratosfera. Estos piroCb contribuyen significativamente a los aerosoles estratosféricos, con el potencial de tener impactos climáticos dominantes en el futuro.

Área de la Ciencia:

Ciencias atmosféricas
Ciencias del clima
Ciencia de los aerosoles

Sus antecedentes:

Las nubes pirocumulonimbus (pyroCb), formadas por incendios forestales, inyectan humo en la estratosfera.
Los impactos climáticos del piroCb son inciertos debido a su naturaleza episódica.

Objetivo del estudio:

Cuantificar la contribución del humo de piroCb al presupuesto de aerosoles estratosféricos.
Para comprender la influencia a largo plazo de la actividad de piroCb en los aerosoles estratosféricos.

Principales métodos:

Análisis de 13 años de observaciones en el aire.
Mediciones in situ de las propiedades del humo del piroCb.

Principales resultados:

El humo de piroCb exhibe propiedades de aerosol distintivas y estables.
PyroCb contribuye con el 10-25% del carbono negro y los aerosoles orgánicos en la estratosfera inferior actual.
Los impactos se observan tanto en el hemisferio norte como en el sur.

Conclusiones:

PyroCb influye significativamente en el presupuesto de aerosoles estratosféricos.
El aumento de la frecuencia o magnitud del piroCb en los climas futuros podría conducir a tendencias dominantes de aerosoles estratosféricos.

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