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Ocho siglos de variabilidad de la atmósfera del océano Atlántico Norte variabilidad de la atmósfera
1Rosenstiel School of Marine and Atmospheric Science, University of Miami, Miami, FL 33149, USA. National Oceanic and Atmospheric Administration Paleoclimatology Program and the Institute for Arctic and Alpine Research, University of Colorado, B.
Science (New York, N.Y.)
|November 27, 1999
Resumen
La variabilidad climática del Atlántico tropical a lo largo de 825 años revela un modo decadal clave. También son evidentes los cambios a escala de siglos y un posible cambio climático en el hemisferio norte hace unos 700 años.
Área de la Ciencia:
- Paleoclimatología Paleoclimatología
- Dinámica del océano y la atmósfera Dinámica del océano y la atmósfera
- Meteorología Tropical.
Sus antecedentes:
- El clima tropical del Atlántico Norte está influenciado por los vientos alisios, la Zona de Convergencia Intertropical (ZIC) y las temperaturas de la superficie del mar.
- Comprender la variabilidad climática pasada es crucial para predecir las tendencias climáticas futuras.
Objetivo del estudio:
- Para reconstruir el surgimiento tropical y la variabilidad de los vientos alisios en los últimos 825 años utilizando datos de sedimentos del Caribe de alta resolución.
- Investigar los modos dominantes de la variabilidad climática en el Atlántico tropical.
Principales métodos:
- Análisis de un núcleo de sedimentos de alta resolución del Caribe.
- Las reconstrucciones paleoclimáticas a escala subdecenal.
Principales resultados:
- Se confirmó un destacado modo decadal (12 a 13 años) de variabilidad atlántica, probablemente impulsado por el acoplamiento océano-atmósfera.
- La evidencia sugiere una variabilidad sustancial a escala de siglo en el Atlántico tropical.
- No se identificó ningún modo de variabilidad interdecadal distinto como característica de la región.
Conclusiones:
- El Atlántico tropical exhibe una significativa variabilidad climática a escala de décadas y siglos.
- La región puede haber sido afectada por un gran cambio climático en el hemisferio norte hace aproximadamente 700 años.
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