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El hidroclima interglacial en el Pacífico occidental tropical a través del Pleistoceno tardío
A N Meckler1, M O Clarkson, K M Cobb
1Geological and Planetary Science Department, California Institute of Technology, Pasadena, CA, USA. nele.meckler@erdw.ethz.ch
Science (New York, N.Y.)
|May 5, 2012
Resumen
El hidroclima tropical se mantuvo estable a través de los interglaciales, lo que sugiere que puede estabilizar o amplificar el cambio climático basado en el forzamiento. Esto impacta la comprensión de las dinámicas climáticas pasadas.
Área de la Ciencia:
- Paleoclimatología Paleoclimatología
- Ciencias del clima Ciencias del clima Ciencias del clima
- Geología Cuaternaria Geología Cuaternaria
Sus antecedentes:
- El dióxido de carbono atmosférico (CO2) y las temperaturas de la Antártida muestran cambios hace unos 430.000 años.
- Los efectos climáticos globales de estos cambios no se comprenden completamente.
Objetivo del estudio:
- Reconstruir el hidroclima tropical del Pacífico Occidental desde 570 hasta 210 ka.
- Investigar la sensibilidad del hidroclima tropical a las variaciones climáticas interglaciales.
Principales métodos:
- La reconstrucción del paleoclima basado en estalagmitas.
- Análisis de los cambios hidroclimáticos en el Pacífico occidental tropical.
Principales resultados:
- Las precipitaciones tropicales fueron consistentes a través de cuatro interglaciales.
- El hidroclima tropical mostró insensibilidad a las variaciones de temperatura interglaciales P ((CO ((2)) y de altas latitudes.
- El secado en el Pacífico occidental tropical coincidió con el enfriamiento de las altas latitudes del norte durante las terminaciones glaciales.
Conclusiones:
- El motor de calor convectivo tropical puede actuar como un estabilizador o amplificador del clima.
- La respuesta del hidroclima depende de la naturaleza del forzamiento climático.
- Proporciona información sobre la dinámica del clima tropical durante los ciclos glacial e interglacial.
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