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Una ley simple para el parto de crías en estanterías de hielo.

Richard B Alley¹, Huw J Horgan, Ian Joughin

¹Department of Geosciences, Pennsylvania State University (Penn State), University Park, PA 16802, USA. rba6@psu.edu

Science (New York, N.Y.)

|November 29, 2008

Resumen

El parto de los icebergs, un gran desafío para los modelos de las capas de hielo, aumenta con la tasa de propagación de la plataforma. Esto sugiere que la pérdida de contrafuertes por fricción impulsa el retroceso de la plataforma y acelera el aumento del nivel del mar.

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Área de la Ciencia:

Glaciología glaciología.
Ciencias del clima Ciencias del clima Ciencias del clima
Ciencias del Sistema Terrestre Ciencias del Sistema Terrestre

Sus antecedentes:

Los modelos de las capas de hielo luchan por simular con precisión el parto de los icebergs.
Una ley basada en la física para el parto sigue siendo difícil de alcanzar, lo que dificulta las predicciones precisas del aumento del nivel del mar.

Objetivo del estudio:

Para investigar la relación entre la dinámica de la plataforma de hielo y el parto de los icebergs.
Identificar los factores clave que influyen en las tasas de parto para mejorar el modelado de las capas de hielo.

Principales métodos:

Análisis comparativo del parto de icebergs a través de una amplia gama de plataformas de hielo.
Examen de la correlación entre la tasa de propagación a lo largo del flujo y los eventos de parto.

Principales resultados:

Se encontró que las tasas de parto de icebergs aumentan significativamente con la tasa de propagación de las plataformas de hielo a lo largo del flujo.
Esta correlación sugiere un vínculo directo entre la pérdida por fricción de los contrafuertes y el aumento del parto.

Conclusiones:

La pérdida de contrafuertes por fricción, al aumentar la extensión de la plataforma de hielo, promueve el parto y el posterior retroceso de la plataforma.
Este proceso acelera el flujo de las capas de hielo, contribuyendo al aumento global del nivel del mar y destacando la necesidad de parámetros de parto refinados en los modelos.