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Cambios impulsados por la insolación en la circulación atmosférica durante los últimos 116.000 años en el Brasil
Francisco W Cruz1, Stephen J Burns, Ivo Karmann
1Department of Geosciences, University of Massachusetts, Amherst, 01002 Massachusetts, USA. fdacruz@geo.umass.edu
Nature
|March 4, 2005
Resumen
Los ciclos Dansgaard-Oeschger influyeron en el ciclo hidrológico tropical, impactando las precipitaciones en Brasil. Sin embargo, estos cambios climáticos a escala milenaria fueron menos dominantes que en el hemisferio norte.
Área de la Ciencia:
- Paleoclimatología Paleoclimatología
- La dinámica del clima La dinámica del clima La dinámica del clima
- Historia del clima en América del Sur Historia del clima en América del Sur
Sus antecedentes:
- Las oscilaciones de temperatura a escala milenaria, conocidas como ciclos de Dansgaard-Oeschger, fueron una señal climática dominante en el hemisferio norte durante el último período glacial.
- El alcance de la influencia del ciclo de Dansgaard-Oeschger en el hemisferio sur tropical y subtropical, en particular su ciclo hidrológico, sigue siendo incierto.
- Los cambios de insolación, impulsados por el ciclo de precesión de la Tierra, se consideran el principal forzamiento climático directo en el hemisferio sur.
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