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Simulating Impacts of Ice Storms on Forest Ecosystems
Published on: June 30, 2020
El impacto de los incendios forestales boreales en el calentamiento climático
J T Randerson1, H Liu, M G Flanner
1Department of Earth System Science, University of California, Irvine, CA 92697, USA. jranders@uci.edu
Resumen
Los incendios forestales boreales aumentan inicialmente el calentamiento, pero enfrian el clima durante un ciclo de 80 años debido a los cambios en el albedo superficial. Esto sugiere que el aumento de la actividad de los incendios puede no acelerar el calentamiento global.
Área de la Ciencia:
- Ciencias del clima Ciencias del clima Ciencias del clima
- Ecología Ecología Ecología.
- Ciencias de la atmósfera Ciencias atmosféricas.
Sus antecedentes:
- Los incendios forestales boreales tienen un impacto significativo en el sistema climático de la Tierra.
- Comprender el forzamiento radiativo neto de estos incendios es crucial para el modelado climático.
Objetivo del estudio:
- Para cuantificar los efectos de forzamiento radiativo integrado de los incendios forestales boreales.
- Para analizar la influencia de los gases de efecto invernadero, los aerosoles, el carbono negro y los cambios de albedo en el clima durante un ciclo de fuego de 80 años.
Principales métodos:
- Medidas y análisis de un incendio en el bosque boreal.
- Integración de los efectos de los gases de efecto invernadero, los aerosoles y la deposición de carbono negro.
- Evaluación de los cambios posteriores al incendio en el albedo superficial.
Principales resultados:
- El forzamiento radiativo neto fue positivo en el primer año posterior al incendio (+34 ± 31 W/m2).
- Durante un ciclo de fuego de 80 años, el forzamiento radiativo neto fue negativo (-2.3 ± 2.2 W/m2).
- Los aumentos multidecadales en el albedo superficial tuvieron un mayor impacto que los gases de efecto invernadero emitidos por los incendios.
Conclusiones:
- Los incendios forestales boreales tienen un efecto de enfriamiento en el clima cuando se promedian en un ciclo de 80 años.
- Los aumentos futuros en la actividad de incendios boreales no necesariamente acelerarán el calentamiento climático.
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