Local Radiocarbon Reservoir Age (Delta-R) Variability from the Nearshore and Open-Ocean Environments of the Florida Keys Reef Tract During the Holocene and Associated U-Series and Radiocarbon Data
September 7, 2021
Holocene-aged corals from reef cores collected throughout the Florida Keys reef tract (FKRT; Fig. 1) were dated using a combination of U-series and radiocarbon techniques to quantify the millennial-scale variability in the local radiocarbon reservoir age (delta-R) of the shallow water environments of south Florida. delta-R provides a measure of the deviation of local radiocarbon concentrations of marine environments from the global average and can be used as a tracer of oceanic circulation and local hydrology. We combined our coral-based estimates of delta-R using statistical modelling to reconstruct millennial-scale variability in delta-R at locations on the FKRT with (nearshore) and without (open ocean) terrestrial influence. We also used the models to provide temporally-explicit estimates of delta-R that can be used in radiocarbon calibrations of marine samples from the region. In v.1.0, the coral-based estimates of delta-R were derived using data from the Marine13 radiocarbon calibration curve (Reimer and others, 2013). In v.2.0, the delta-R estimates were instead derived using the Marine20 radiocarbon calibration curve (Heaton and others, 2020). For further information regarding data collection and analysis methods refer to Toth et al. (2017).
Toth, L.T., Cheng,H., Edwards, R.L., Ashe, E., and Richey, J.N., 2017, Millennial-scale variability in the local radiocarbon reservoir age of south Florida during the Holocene: Quaternary Geochronology, v. 42, p. 130-143, https://doi.org/10.1016/j.quageo.2017.07.005.
Note: This data release was versioned on August 30, 2021. Please see the Suggested Citation section for details.
Toth, L.T., Cheng,H., Edwards, R.L., Ashe, E., and Richey, J.N., 2017, Millennial-scale variability in the local radiocarbon reservoir age of south Florida during the Holocene: Quaternary Geochronology, v. 42, p. 130-143, https://doi.org/10.1016/j.quageo.2017.07.005.
Note: This data release was versioned on August 30, 2021. Please see the Suggested Citation section for details.
Citation Information
Publication Year | 2021 |
---|---|
Title | Local Radiocarbon Reservoir Age (Delta-R) Variability from the Nearshore and Open-Ocean Environments of the Florida Keys Reef Tract During the Holocene and Associated U-Series and Radiocarbon Data |
DOI | 10.5066/F7P8492Q |
Authors | Lauren T Toth, Hai Cheng, R. Lawrence Edwards, Erica Ashe, Julie N Richey |
Product Type | Data Release |
Record Source | USGS Asset Identifier Service (AIS) |
USGS Organization | St. Petersburg Coastal and Marine Science Center |
Rights | This work is marked with CC0 1.0 Universal |
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Millennial-scale variability in the local radiocarbon reservoir age of south Florida during the Holocene
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Millennial-scale variability in the local radiocarbon reservoir age of south Florida during the Holocene
A growing body of research suggests that the marine environments of south Florida provide a critical link between the tropical and high-latitude Atlantic. Changes in the characteristics of water masses off south Florida may therefore have important implications for our understanding of climatic and oceanographic variability over a broad spatial scale; however, the sources of variability...
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Lauren Toth, Hai Cheng, R. Lawrence Edwards, Erica L. Ashe, Julie N. Richey
Lauren Toth, Ph.D.
Research Physical Scientist
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Julie Richey, Ph.D.
Research Geologist
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