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Paleoclima: las mareas oceánicas y los eventos de Heinrich
Brian K Arbic1, Douglas R Macayeal, Jerry X Mitrovica
1Program in Atmospheric and Oceanic Sciences, Princeton University, PO Box CN710, Sayre Hall, Princeton, New Jersey 08544-0710, USA. arbic@splash.princeton.edu
Nature
|November 27, 2004
Resumen
Durante la última edad de hielo, las mareas oceánicas excepcionalmente grandes en el mar de Labrador coincidieron con descargas masivas de icebergs conocidas como eventos de Heinrich. Estas poderosas mareas probablemente jugaron un papel clave en la liberación de grandes icebergs en el Atlántico Norte.
Área de la Ciencia:
- Paleoclimatología Paleoclimatología
- Oceanografía La oceanografía es la oceanografía.
- Geología Cuaternaria Geología Cuaternaria
Sus antecedentes:
- La última edad de hielo experimentó una variabilidad climática significativa, marcada por liberaciones periódicas y masivas de escombros de balsas de hielo en el Atlántico Norte.
- Estos bruscos cambios climáticos, conocidos como eventos de Heinrich, se originaron principalmente en el mar de Labrador y tuvieron implicaciones globales.
Objetivo del estudio:
- Para investigar el papel de las mareas oceánicas en el mar de Labrador durante el período de los eventos de Heinrich.
- Explorar el vínculo potencial entre la dinámica de las mareas y la liberación de las armadas de icebergs.
Principales métodos:
- Análisis de los registros geológicos que indican la deposición de escombros de las balsas de hielo.
- Reconstrucción de las antiguas franjas de mareas oceánicas en el mar de Labrador.
Principales resultados:
- Se identificaron mareas oceánicas excepcionalmente grandes dentro del Mar de Labrador durante la época de los eventos de Heinrich.
- Se observó una fuerte correlación entre los períodos de actividad de marea alta y la deposición de escombros de balsas de hielo.
Conclusiones:
- Las mareas oceánicas en el mar de Labrador se amplificaron significativamente durante los eventos de Heinrich de la última edad de hielo.
- Estas mareas amplificadas probablemente actuaron como un catalizador, desencadenando la liberación de armadas masivas de icebergs de los glaciares.
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