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Transiente Eoceno medio CO2 atmosférico y variaciones de temperatura
Peter K Bijl1, Alexander J P Houben, Stefan Schouten
1Biomarine Sciences, Institute of Environmental Biology, Faculty of Science, Laboratory of Palaeobotany and Palynology, Utrecht University, Budapestlaan 4, 3584 CD Utrecht, Netherlands. p.k.bijl@uu.nl
Science (New York, N.Y.)
|November 6, 2010
Resumen
Durante el Óptimo Climático del Eoceno Medio, el aumento de los niveles de dióxido de carbono se correlacionó con un calentamiento global significativo. Esto sugiere que el dióxido de carbono (CO2) es un factor clave del cambio climático transitorio.
Área de la Ciencia:
- Paleoclimatología Paleoclimatología
- La geoquímica es la geoquímica.
Sus antecedentes:
- La época del Eoceno se caracterizó por el calor, a menudo relacionado con el alto nivel de dióxido de carbono (CO2) atmosférico.
- Una relación directa entre el CO2 y los cambios climáticos a corto plazo sigue sin estar clara.
Objetivo del estudio:
- Investigar la relación entre el CO2 atmosférico y la temperatura durante el Óptimo Climático del Eoceno Medio (MECO).
- Para reconstruir la dinámica climática durante un evento transitorio de calentamiento global.
Principales métodos:
- Se utilizó la paleotermometría molecular orgánica para reconstruir las temperaturas de la superficie del mar (SST).
- Desarrolló reconstrucciones de la presión parcial atmosférica del dióxido de carbono (pCO2).
Principales resultados:
- Las SST del suroeste del Pacífico aumentaron entre 3° y 6°C durante el MECO.
- Los niveles atmosféricos de pCO2 aumentaron por un factor de 2 a 3 al mismo tiempo.
Conclusiones:
- Se observó una fuerte correlación entre el aumento de SSTs y el aumento de pCO2 durante el MECO.
- El aumento de pCO2 probablemente jugó un papel importante en la conducción del calentamiento global durante este período.
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