(Table S1) Age determination of sediment core KNR166-2_51

Previous studies showed that sea surface salinity (SSS) in the Florida Straits as well as Florida Current transport covaried with changes in North Atlantic climate over the past two millennia. However, little is known about earlier Holocene hydrographic variability in the Florida Straits. Here, we c...

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Bibliographic Details
Main Authors: Schmidt, Matthew W, Weinlein, William A, Marcantonio, Franco, Lynch-Stieglitz, Jean
Format: Dataset
Language:English
Published: PANGAEA 2012
Subjects:
Age
14C AMS
14C calibrated
dated
dated standard deviation
Calendar age
standard deviation
DEPTH
sediment/rock
Florida Strait
KN166-2
Knorr
KNR166-2
KNR166-2-51
Laboratory code/label
PC
Piston corer
Pacific
North Atlantic
Planktonic foraminifera
Online Access:https://doi.pangaea.de/10.1594/PANGAEA.824555
https://doi.org/10.1594/PANGAEA.824555
Description
Summary:Previous studies showed that sea surface salinity (SSS) in the Florida Straits as well as Florida Current transport covaried with changes in North Atlantic climate over the past two millennia. However, little is known about earlier Holocene hydrographic variability in the Florida Straits. Here, we combine Mg/Ca-paleothermometry and stable oxygen isotope measurements on the planktonic foraminifera Globigerinoides ruber (white variety) from Florida Straits sediment core KNR166-2 JPC 51 (24° 24.70' N, 83° 13.14' W, 198 m deep) to reconstruct a high-resolution (~25 yr/sample) early to mid Holocene record of sea surface temperature and d18OSW (a proxy for SSS) variability. After removing the influence of global d18OSW change due to continental ice volume variability, we find that early Holocene SSS enrichments are associated with increased evaporation/precipitation ratios in the Florida Straits during periods of reduced solar forcing, increased ice rafted debris in the North Atlantic and the development of more permanent El Niño-like conditions in the eastern equatorial Pacific. When considered with previous high-resolution reconstructions of Holocene tropical atmospheric circulation changes, our results provide evidence that variations in solar forcing over the early Holocene had a significant impact on the global tropical hydrologic cycle.

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