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Tendencia global del nivel del mar en el siglo pasado
Science (New York, N.Y.)
|March 26, 1982
Resumen
El nivel global del mar aumentó 12 cm en el siglo pasado, en correlación con el aumento de las temperaturas del aire. La expansión térmica del océano explica gran parte de este aumento, con una débil evidencia del derretimiento de la capa de hielo.
Área de la Ciencia:
- Ciencias del clima Ciencias del clima Ciencias del clima
- Oceanografía La oceanografía es la oceanografía.
- Glaciología glaciología.
Sus antecedentes:
- El nivel medio global del mar ha mostrado una tendencia al alza significativa durante el siglo pasado.
- Los cambios en el nivel del mar son un indicador crítico del cambio climático y sus impactos.
Objetivo del estudio:
- Para analizar los datos globales del mareómetro para cuantificar el aumento del nivel del mar en el siglo pasado.
- Para investigar la correlación entre los cambios en el nivel del mar y las tendencias globales de la temperatura del aire de la superficie.
- Identificar los principales impulsores del aumento observado del nivel del mar.
Principales métodos:
- Análisis de datos históricos de estaciones de mareómetro en todo el mundo.
- Análisis de correlación estadística entre los registros del nivel del mar y los datos de temperatura global.
- Modelado de la expansión térmica del océano y las contribuciones del derretimiento del hielo.
Principales resultados:
- El nivel medio del mar aumentó aproximadamente 12 centímetros en todo el mundo en los últimos 100 años.
- Se observó una fuerte correlación positiva entre el aumento del nivel del mar y la temperatura global del aire de la superficie.
- La expansión térmica del agua del océano representa una parte sustancial del aumento del nivel del mar.
- La débil evidencia indirecta sugiere un derretimiento neto de las capas de hielo continentales.
Conclusiones:
- El aumento observado del nivel del mar está estrechamente relacionado con el calentamiento global.
- La expansión térmica del océano es un factor dominante que contribuye a los cambios actuales del nivel del mar.
- Se necesita más investigación para cuantificar definitivamente la contribución del derretimiento de la capa de hielo al aumento del nivel del mar.
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