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El aumento global del nivel del mar y el efecto invernadero: ¿podrían estar conectados?
Science (New York, N.Y.)
|May 19, 1989
Resumen
El nivel global del mar está subiendo más de 1 milímetro al año. Después de tener en cuenta el ajuste glacial, una señal global coherente de 2,4 mm / año sugiere que el calentamiento climático está afectando los niveles del mar.
Área de la Ciencia:
- Oceanografía La oceanografía es la oceanografía.
- Ciencias del clima Ciencias del clima Ciencias del clima
- La geofísica es la geofísica.
Sus antecedentes:
- Los registros del manómetro de marea indican que el aumento global del nivel del mar supera los 1 mm/año.
- La cobertura no uniforme de los océanos y la variabilidad espacial en los datos del mareómetro crean incertidumbre.
- Existe una renuencia a atribuir el aumento observado del nivel del mar a fenómenos a escala global como el efecto invernadero.
Objetivo del estudio:
- Para determinar si existe una señal de aumento del nivel del mar globalmente coherente.
- Investigar la influencia del ajuste isostático glacial en las tendencias locales del nivel del mar.
- Evaluar el vínculo potencial entre el aumento del nivel del mar y el calentamiento global del clima.
Principales métodos:
- Análisis de registros de mareómetro de larga duración.
- Filtrando los datos del mareómetro para eliminar los efectos de ajuste isostático glacial.
- Análisis estadístico para identificar la dispersión geográfica y la fuerza de la señal.
Principales resultados:
- Los registros filtrados del mareómetro muestran una dispersión geográfica reducida.
- Se identificó una señal global coherente de aumento del nivel del mar de 2,4 +/- 0,90 mm/año.
- Esta señal sugiere una tendencia consistente en diferentes ubicaciones.
Conclusiones:
- Una señal global coherente de aumento del nivel del mar es detectable después de tener en cuenta el ajuste isostático glacial.
- Esta señal proporciona una evidencia más sólida de los cambios en el nivel del mar a escala global.
- Los hallazgos apoyan la hipótesis de que el calentamiento global del clima es un factor que contribuye al aumento observado del nivel del mar.
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