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Measurements of CO2 Fluxes at Non-Ideal Eddy Covariance Sites
Published on: June 24, 2019
Las restricciones de observación en el presupuesto global de CO2 atmosférico
Resumen
Los ecosistemas terrestres absorben cantidades significativas de dióxido de carbono (CO2), actuando como un sumidero mayor. Esta investigación indica que los océanos no son el principal sumidero de las emisiones de CO2 de los combustibles fósiles.
Área de la Ciencia:
- Química de la atmósfera La química de la atmósfera
- Oceanografía La oceanografía es la oceanografía.
- Ecología Ecología Ecología.
Sus antecedentes:
- Las concentraciones de dióxido de carbono (CO2) atmosférico y las presiones parciales oceánicas son indicadores clave del ciclo global del carbono.
- Comprender las fuentes y sumideros de CO2 es crucial para la investigación del cambio climático.
- Estudios anteriores han destacado el papel de los océanos y los ecosistemas terrestres en la absorción de CO2.
Objetivo del estudio:
- Identificar las fuentes y sumideros de dióxido de carbono atmosférico (CO2) significativos a nivel mundial.
- Para conciliar las concentraciones de CO2 atmosférico con los datos de presión parcial del océano.
- Determinar las contribuciones relativas de los ecosistemas terrestres y los océanos a la absorción de CO2.
Principales métodos:
- Análisis combinado de las concentraciones de CO2 atmosférico observado y las presiones parciales de la superficie del océano.
- Utilizó un modelo de circulación general (GCM) para simular el transporte atmosférico.
- Comparó las concentraciones de la capa límite derivadas del modelo con los datos observados para varias distribuciones fuente-sumidero.
Principales resultados:
- Se observó un significativo gradiente de concentración de CO2 atmosférico norte-sur.
- Las simulaciones de modelos indicaron que los sumideros de CO2 deben ser mayores en el hemisferio norte para mantener el gradiente observado.
- La absorción oceánica de CO2 en el hemisferio norte fue insuficiente para tener en cuenta las emisiones de combustibles fósiles.
Conclusiones:
- Los ecosistemas terrestres juegan un papel crucial como un gran sumidero para el CO2 atmosférico.
- Los océanos no son el principal sumidero de CO2 derivado de los combustibles fósiles.
- Una parte sustancial del CO2 antropogénico es absorbido por los ecosistemas terrestres.
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