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Florecimiento generalizado de fitoplancton provocado por los incendios forestales australianos de 2019-2020

Weiyi Tang^1,2, Joan Llort^3,4, Jakob Weis^3,5

¹Division of Earth and Climate Sciences, Nicholas School of the Environment, Duke University, Durham, NC, USA.

|September 16, 2021

Resumen

Los aerosoles de los incendios forestales de Australia fertilizaron el Océano Austral, causando la proliferación del fitoplancton. Esto pone de relieve el vínculo crucial entre los incendios forestales, el ciclo de nutrientes y la productividad marina en un clima cambiante.

Área de la Ciencia:

Ciencias del medio ambiente
La oceanografía
Ciencias del clima

Sus antecedentes:

Los incendios forestales están aumentando en frecuencia e intensidad debido al cambio climático.
Los aerosoles de fuego salvaje pueden transportar nutrientes esenciales como el hierro al océano.
El impacto de la deposición de aerosoles de incendios forestales en la productividad marina no se comprende bien.

Objetivo del estudio:

Para investigar el efecto de los aerosoles de incendios forestales australianos en la productividad del fitoplancton en el Océano Austral.
Proporcionar observaciones directas de los impactos de los aerosoles de incendios forestales en los ecosistemas marinos.

Principales métodos:

Utilizamos datos satelitales para monitorear las condiciones del océano.
Se utilizaron datos de flotadores biogeoquímicos autónomos Argo.
Analizó muestras de aerosol y trayectorias atmosféricas.

Principales resultados:

Florecimiento generalizado de fitoplancton en el Océano Austral desde diciembre de 2019 hasta marzo de 2020.
Confirmado alto contenido de hierro en aerosoles de incendios forestales australianos.
Se ha demostrado el probable transporte de estos aerosoles a las regiones de floración.

Conclusiones:

Las floraciones de fitoplancton probablemente fueron causadas por la fertilización de hierro de los aerosoles de incendios forestales australianos en las aguas del Océano Sur limitadas en hierro.
La comprensión mejorada del ciclo de incendios forestales, aerosoles y nutrientes es crucial para el modelado del sistema climático.
Esta investigación mejora la comprensión del ciclo global del carbono y la regulación del clima.

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