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Decadal cyclicity of regional mid-Holocene precipitation : evidence from Dominican coral proxies

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Tipo de acceso
AbiertoTipo de Material
ArtículoTipo de Contenido
Investigación científicaMateria
Recursos naturales - República DominicanaClima - República Dominicana
Paleobiología
Recursos costeros y marinos
Arrecifes de coral
Idioma
InglésAudiencia
Técnicos, profesionales y científicosColección
- Investigación ambiental [1532]
Metadatos
Mostrar el registro completo del ítemSinopsis: | The stable carbon (δ13C) and oxygen (δ18O) isotopic compositions of four Holocene specimens of Montastraea sp. and Siderastrea sp. coral skeletons from the Dominican Republic were analyzed to examine decadal-scale fluctuations in regional precipitation. The specimens range in length from 47 to 197 years individually and range in age from ∼7.2 to 5.2 kyr. Oscillations in the δ13C and δ18O of coral skeletons from the Holocene Enriquillo Valley occur with a seemingly consistent frequency of 15–20 years. For one coral (∼6 ka) this decadal to multidecadal mode of variability is statistically significant. The decadal to multidecadal mode of stable isotopic variability may represent cyclic fluctuations in mid-Holocene migration of the Intertropical Convergence Zone (ITCZ) or in the hydrogeology of the region as governed by fluctuations in the passage of tropical storms and hurricanes. Regional temperature is believed to act as only a secondary control on the δ18O values of these corals. However, ITCZ migration and/or oscillations in storm frequency at this site may ultimately reflect decadal-scale patterns in greater tropical North Atlantic sea surface temperatures. The length and resolution of climate variability represented in this study indicate a persistent decadal to multidecadal mode of Atlantic climate fluctuation throughout the mid-Holocene that is indistinguishable from observed historical climate. |
Autor(es): | Greer, Lisa
Swart, Peter K. |
Año: | 2006 |
Publicado: | Paleoceanography, 21, PA2020 |
Citación: | Greer, L., & Swart, P. K. (2006). Decadal cyclicity of regional mid‐Holocene precipitation: evidence from Dominican coral proxies. Paleoceanography, 21, PA2020. Recuperado de: |
URI: | https://bvearmb.do/handle/123456789/5779
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