Home
Resource
Late Deglacial (13.9 TO 8 KYR B.P.) records from the reef crest coral Acropora palmata in Barbados
PDF
PDF format is widely accepted and good for printing.
Plug-in required
PDF-1(104.68 MB)
Citation & Export
View Usage Statistics
Staff View

Citation & Export
Hide

Simple citation

Abdul, Nicole Allyson. Late Deglacial (13.9 TO 8 KYR B.P.) records from the reef crest coral Acropora palmata in Barbados. Retrieved from https://doi.org/doi:10.7282/T3FJ2K64

Export

Click here for information about Citation Management Tools at Rutgers.

Statistics
Hide

Description

TitleLate Deglacial (13.9 TO 8 KYR B.P.) records from the reef crest coral Acropora palmata in Barbados
NameAbdul, Nicole Allyson (author); Wright, James (chair); Miller, Kenneth (internal member); Fairbanks, Richard (internal member); Charles, Christopher (outside member); Rutgers University; Graduate School - New Brunswick
Date Created2017
Other Date2017-01 (degree)
SubjectGeological Sciences, Sea level--Barbados, Elkhorn coral
Extent1 online resource (xiv, 222 p. : ill.)
DescriptionThe radioactive isotopes of Uranium and Thorium obtained from fossil reef-crest corals Acropora palmata are used to constrain and reconstruct sea level at Barbados during the late deglaciation (13.9 to 8 kyr BP). We find that sea level tracked the climate oscillations remarkably well. Sea-level rise was fast in the early Allerød (25 mm yr-1), but decreased smoothly into the Younger Dryas (7 mm yr-1) when the rate plateaued to <4 mm yr-1here termed a sea-level “slow stand”. No evidence was found indicating a jump in sea level at the beginning of the Younger Dryas as proposed by some researchers. Following the “slow-stand”, the rate of sea-level rise accelerated rapidly, producing the 14 ± 2 m sea-level jump known as MWP-1B; occurred between 11.45 and 11.1 kyr BP with peak sea-level rise reaching 40 mm yr-1. Following MWP-1B, sea-level rise rapidly decreased to 8 mm yr-1. Sea surface temperatures (SST) were reconstructed at Barbados to constrain variability in the Atlantic Warm Pool (AWP) during the deglaciation. The same A. palmata samples used in Abdul et al. (2016) were analyzed for 18O. The sea level associated with each sample allowed a direction determination of the ice volume correction to δ18O data. Applying the δ18O-SST calibration (Reynaud et al., 2007), we find a warm tropical Atlantic, > 28.5oC during the Allerød. At the start of the Younger Dryas, SSTs cooled by ~3o C possibly signaling a collapse of the large AWP. By 12.5 kyr BP, warming recommenced signaling re-establishment of the AWP at Barbados. I have laid the framework for future work on the Barbados coral collection. Reconstructing seasonality during different climate states (Bølling-Allerød vs. Younger Dryas vs. the Holocene) provides critical data for understanding how the AWP forced or responded at critical times. To quantify seasonality, high-resolution samples (~0.3 mm sample spacing using a micro-mill) on the banded coral Montastrea annularis were analyzed. Preliminary results show that extension rates for M. annularis were low (< 5 mm yr-1) which limits temporal resolution but more importantly may introduce kinetic effects into the incorporation of stable isotopes into the coral skeleton.
NotePh.D.
NoteIncludes bibliographical references
Noteby Nicole Allyson Abdul
Genretheses, ETD doctoral
Persistent URLhttps://doi.org/doi:10.7282/T3FJ2K64
Languageeng
CollectionGraduate School - New Brunswick Electronic Theses and Dissertations
Organization NameRutgers, The State University of New Jersey
RightsThe author owns the copyright to this work.
Version 8.5.5
Rutgers University Libraries - Copyright ©2024