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La aridificación de la meseta tibetana está relacionada con el enfriamiento global en la transición Eoceno-Oligoceno
Guillaume Dupont-Nivet1, Wout Krijgsman, Cor G Langereis
1Paleomagnetic Laboratory Fort Hoofddijk, Department of Earth Sciences, Utrecht University, Budapestlaan 17, The Netherlands. gdn@geo.uu.nl
Nature
|February 9, 2007
Resumen
El enfriamiento global durante la transición Eoceno-Oligoceno causó una significativa aridificación y enfriamiento en Asia. Esta investigación pone de relieve el impacto de los eventos climáticos globales en los entornos continentales.
Área de la Ciencia:
- Paleoclimatología Paleoclimatología
- Geología Geología Geología.
Sus antecedentes:
- Los cambios ambientales asiáticos a menudo se atribuyen a la elevación de la meseta tibetana y la deriva continental.
- El papel de los eventos climáticos globales, como la transición Eoceno-Oligoceno, en la configuración de los entornos asiáticos sigue sin estar claro.
Objetivo del estudio:
- Investigar la influencia de la transición Eoceno-Oligoceno en los entornos asiáticos.
- Determinar si el clima global o la tectónica impulsaron principalmente la aridificación en Asia.
Principales métodos:
- Utilizó magnetostratigrafía y ciclostratigrafía para la datación precisa de los registros sedimentarios.
- Analizó depósitos de lagos de playa en la meseta tibetana nororiental para identificar eventos de aridificación.
Principales resultados:
- La aridificación en el noreste de la meseta tibetana, marcada por la desaparición de los depósitos del lago Playa, coincidió exactamente con la transición Eoceno-Oligoceno.
- Los datos paleontológicos y paleoambientales confirman una amplia aridificación y enfriamiento en toda la Asia continental durante este período.
Conclusiones:
- La transición Eoceno-Oligoceno, un evento de enfriamiento global, influyó significativamente en los ambientes asiáticos, causando la aridificación y el enfriamiento.
- Distingue el impacto del clima global de las fuerzas tectónicas en los entornos asiáticos continentales, destacando el papel de los cambios climáticos globales.
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