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Forzamiento tropical del Pacífico de la variabilidad decenal de la SST en el Océano Índico occidental en los últimos
Cole1, Dunbar, McClanahan
1Department of Geological Sciences/Institute of Arctic and Alpine Research (INSTAAR)/Program in Atmospheric and Ocean Sciences, University of Colorado, Boulder, CO 80309, USA. Department of Geological and Environmental Sciences, Stanfor.
Science (New York, N.Y.)
|January 29, 2000
Resumen
Un registro de coral de 194 años revela que la variabilidad climática del Pacífico tropical impacta significativamente en el Océano Índico occidental. Este estudio documenta los cambios climáticos decenales y una tendencia de calentamiento de 1.3 ° C desde el siglo XIX.
Área de la Ciencia:
- Paleoclimatología Paleoclimatología
- Oceanografía La oceanografía es la oceanografía.
- Ciencias del clima Ciencias del clima Ciencias del clima
Sus antecedentes:
- Los registros esqueléticos de coral proporcionan valiosos datos indirectos para reconstruir las condiciones climáticas pasadas.
- Comprender la variabilidad climática decenal es crucial para predecir los impactos futuros del cambio climático.
Objetivo del estudio:
- Para reconstruir la variabilidad de la temperatura de la superficie del mar (SST) durante 194 años utilizando isótopos de oxígeno de coral.
- Para investigar la influencia de la variabilidad climática del Pacífico tropical en el Océano Índico occidental.
Principales métodos:
- Análisis de las proporciones de delta óseo en un coral de Malindi, Kenia.
- Comparación de registros de SST derivados de coral con datos climáticos instrumentales y de proxy.
Principales resultados:
- Un registro de 194 años muestra cambios de SST coherentes con la variabilidad del Pacífico tropical (escalas interanuales a decenales).
- Desde principios del siglo XIX se observó una tendencia significativa de calentamiento de hasta 1,3 °C.
- La variabilidad climática del Pacífico tropical influye de manera demostrable en el Océano Índico occidental.
Conclusiones:
- El Pacífico tropical es un factor clave de la variabilidad climática decenal en el Océano Índico occidental.
- Las regiones con fuertes teleconexiones El Niño-Oscilación Sur también pueden verse influenciadas por este enlace Océano Pacífico-Indio.
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