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| Williams, Carlie; Flower, Benjamin P.; Hastings, David W.; Guilderson, Thomas P.; Quinn, Kelly A.; Goddard, Ethan A.. |
| During the last deglaciation, Greenland ice core and North Atlantic sediment records exhibit multiple abrupt climate events including the Younger Dryas cold episode (12.9-11.7 ka). However, evidence for the presence of the Younger Dryas in the Gulf of Mexico (GOM) and the relationship between GOM sea surface temperature (SST) and high-latitude climate change is less clear. We present new Mg/Ca-SST records from two varieties of the planktonic foraminifer Globigerinoides ruber (white and pink) to assess northern GOM SST history from approximately 18.4-10.8 ka. Thirty-five accelerator mass spectrometry (AMS) C-14 dates from Orca Basin core MD02-2550 provide excellent age control and document high sedimentation rates (similar to 40 cm/kyr). G. ruber (white and... |
| Tipo: Text |
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| Ano: 2010 |
URL: https://archimer.ifremer.fr/doc/00230/34137/33059.pdf |
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| Montero-serrano, Jean-carlos; Bout-roumazeilles, Viviane; Carlson, Anders E.; Tribovillard, Nicolas; Bory, Aloys; Meunier, Guillaume; Sionneau, Thomas; Flower, Benjamin P.; Martinez, Philippe; Billy, Isabelle; Riboulleau, Armelle. |
| The comparison of geochemical and mineralogical characteristics of terrigenous sediments deposited in the northern Gulf of Mexico (GoM) during the Holocene and Last Interglacial (LIG) is used to document the impact of slight differences in insolation and ice-sheet retreat rates on moisture transfer and precipitation patterns over central North America. The records indicate distinct sedimentological signatures over the two time periods, which likely reflect a modification of the main detrital provenance during the LIG compared to the Holocene. Here we postulate that the observed differences in the terrigenous supply during the LIG relative to the Holocene reflect a northeast migration of the main precipitation belt over the Mississippi River watershed... |
| Tipo: Text |
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| Ano: 2011 |
URL: https://archimer.ifremer.fr/doc/00227/33833/32460.pdf |
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| Lodico, Jenna M.; Flower, Benjamin P.; Quinn, Terrence M.. |
| 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... |
| Tipo: Text |
Palavras-chave: Early Holocene; Climate variability; Hydrologic variability. |
| Ano: 2006 |
URL: https://archimer.ifremer.fr/doc/00234/34519/33409.pdf |
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