Subcentennial-Scale Climatic and Hydrologic Variability in the Gulf of Mexico During the Early Holocene
Digital Object Identifier (DOI)
An early Holocene record from the Gulf of Mexico (GOM) reveals climatic and hydrologic changes during the interval from 10.5 to 7 thousand calendar years before present from paired analyses of Mg/Ca and delta O-18 on foraminiferal calcite. The sea surface temperature record based on foraminiferal Mg/Ca contains six oscillations and an overall similar to 1.5 degrees C warming that appears to be similar to the September-March insolation difference. The delta O-18 of seawater in the GOM (delta O-18(GOM)) record contains six oscillations, including a -0.8% excursion that may be associated with the "8.2 ka climate event" or a broader climate anomaly. Faunal census records from three GOM cores exhibit similar changes, suggesting subcentennial-scale variability in the incursions of Caribbean waters into the GOM. Overall, our results provide evidence that the subtropics were characterized by decadal- to centennial-scale climatic and hydrologic variability during the early Holocene.
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Citation / Publisher Attribution
Paleoceanography, v. 21, no. 3, article PA3015.
Scholar Commons Citation
LoDico, Jenna M.; Flower, Benjamin P.; and Quinn, Terrence M., "Subcentennial-Scale Climatic and Hydrologic Variability in the Gulf of Mexico During the Early Holocene" (2006). Marine Science Faculty Publications. 26.