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Cambios en la capa de hielo de la Antártida occidental.
Science (New York, N.Y.)
|November 15, 1991
Resumen
Los cambios en la capa de hielo de la Antártida Occidental están impulsados por ciclos glaciales pasados y la dinámica interna de la capa de hielo, no por el cambio climático actual. Su impacto en el nivel del mar a corto plazo ya está determinado, aunque el comportamiento futuro sigue siendo incierto debido a las encuestas limitadas.
Área de la Ciencia:
- * La glaciología.
- * Ciencias del clima Ciencias del clima
- * Ciencias del sistema terrestre Ciencias del sistema terrestre
Sus antecedentes:
- * La capa de hielo de la Antártida Occidental (WAIS) que fluye hacia el Mar de Ross exhibe un complejo adelgazamiento y engrosamiento regional.
- * Estos cambios observados no están directamente relacionados con los cambios climáticos contemporáneos.
Objetivo del estudio:
- * Para investigar los conductores detrás de los cambios observados en el WAIS.
- * Para evaluar el impacto en el futuro cercano del WAIS en los niveles globales del mar.
Principales métodos:
- * Análisis de la dinámica de las capas de hielo y los ciclos históricos de los glaciares.
- * Evaluación de los procesos internos de las capas de hielo.
Principales resultados:
- * Los cambios en WAIS son el resultado de una combinación de respuesta tardía al final del último ciclo glacial y las inestabilidades internas de la capa de hielo.
- * Las contribuciones del nivel del mar en el futuro cercano están influenciadas principalmente por la dinámica interna de las capas de hielo, en lugar del calentamiento proyectado del efecto invernadero.
Conclusiones:
- * El comportamiento futuro a corto plazo y el impacto en el nivel del mar del WAIS están en gran medida predeterminados por eventos pasados y procesos internos.
- * Los insuficientes datos de las encuestas actualmente limitan la capacidad de predecir el comportamiento general a largo plazo de toda la capa de hielo.
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