(Table 1) Age determination of ODP Site 155-942 ...

Glacioeustatic- and temperature-corrected planktonic foraminiferal oxygen isotope (dd18O) records from ODP Site 942 on the Amazon Fan provide a means of monitoring past changes in the outflow of the Amazon River. This study focuses on the last deglaciation and reveals that during this period there w...

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Bibliographic Details
Main Authors: Maslin, Mark, Ettwein, V J, Wilson, K E, Guilderson, Thomas P, Burns, Stephen J, Leng, Melanie J
Format: Dataset
Language:English
Published: PANGAEA 2011
Subjects:
Sample ID
Sample code/label
DEPTH, sediment/rock
Age, dated material
Age, dated
Age, minimum/young
Age, dated, range, minimum
Calendar age
Calendar age, standard deviation
Composite Core
DSDP/ODP/IODP sample designation
Age, 14C AMS
Age, 14C calibrated
Leg155
Joides Resolution
Ocean Drilling Program ODP
Antarctic
Greenland
The Antarctic
Antarc*
Antarctica
ice core
Online Access:https://dx.doi.org/10.1594/pangaea.816306
https://doi.pangaea.de/10.1594/PANGAEA.816306
Description
Summary:Glacioeustatic- and temperature-corrected planktonic foraminiferal oxygen isotope (dd18O) records from ODP Site 942 on the Amazon Fan provide a means of monitoring past changes in the outflow of the Amazon River. This study focuses on the last deglaciation and reveals that during this period there were significant variations in the outflow, which implies large changes in moisture availability in the Amazon Basin. Aridity in the Amazon Basin seems to occur between 20.5 ka (calendar) to 17.0 ka and 13.6 ka to 11 ka. The second arid period correlates with the start of the Antarctic Cold Reversal and aridity continues throughout the Younger Dryas period. We find that the large-scale trends in Amazon River outflow are dissimilar to high-latitude variability in either hemisphere. Instead high-resolution variations correlate with the d18O difference between Greenland and Antarctica ice core temperature records. This suggests a link between Hemispheric temperature gradients and moisture availability over the Amazon. ... : Supplement to: Maslin, Mark; Ettwein, V J; Wilson, K E; Guilderson, Thomas P; Burns, Stephen J; Leng, Melanie J (2011): Dynamic boundary-monsoon intensity hypothesis: evidence from the deglacial Amazon River discharge record. Quaternary Science Reviews, 30(27-28), 3823-3833 ...

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