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Crecimiento de la capa de hielo de Groenlandia: interpretación
Science (New York, N.Y.)
|December 22, 1989
Resumen
La capa de hielo de Groenlandia se está engrosando, acumulando exceso de hielo y potencialmente reduciendo los niveles mundiales del mar. Esto sugiere un aumento de la precipitación, posiblemente relacionado con climas polares más cálidos.
Área de la Ciencia:
- Glaciología glaciología.
- Ciencias del clima Ciencias del clima Ciencias del clima Ciencias del clima
- Investigación del nivel del mar Investigación del nivel del mar.
Sus antecedentes:
- El equilibrio de masa de la capa de hielo de Groenlandia es crucial para comprender los cambios globales en el nivel del mar.
- Estudios anteriores se han centrado en la pérdida de hielo, pero la ganancia de hielo también es un factor significativo.
Objetivo del estudio:
- Para cuantificar el reciente engrosamiento de la capa de hielo de Groenlandia.
- Evaluar las implicaciones de este engrosamiento para el nivel global del mar.
- Explorar los potenciales impulsores climáticos del aumento de la acumulación de hielo.
Principales métodos:
- Análisis de los cambios en el espesor de la capa de hielo utilizando datos de observación.
- Modelado de las tasas de acumulación de hielo frente al flujo de hielo.
- Cálculo del impacto global del nivel del mar basado en el balance de masas de hielo.
Principales resultados:
- Se observó un engrosamiento de la capa de hielo de 0,23 m/año.
- Exceso de acumulación de hielo del 25% al 45% por encima de los requisitos de balance.
- El agotamiento implícito global del nivel del mar de 0,2 a 0,7 mm / año, dependiendo de la escala de tiempo y área consideradas.
Conclusiones:
- El aumento del espesor del hielo indica una mayor precipitación, potencialmente una característica de los climas polares más cálidos.
- El engrosamiento de la capa de hielo de Groenlandia tiene un efecto medible, aunque actualmente pequeño, en el nivel global del mar.
- Se necesita más investigación para confirmar las tendencias a largo plazo y los impulsores de la precipitación polar.
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