PANGAEA_833739 (Table 1) Radionuclide content in ODP Hole 108-658C Adkins, Jess F; deMenocal, Peter B; Eshel, Gidon (Table 1) Radionuclide content in ODP Hole 108-658C 2006 PANGAEA Dataset Supplement to: Adkins, Jess F; deMenocal, Peter B; Eshel, Gidon (2006): The “African humid period” and the record of marine upwelling from excess 230Th in Ocean Drilling Program Hole 658C. Paleoceanography, 21(4), PA4203, https://doi.org/10.1029/2005PA001200 https://doi.pangaea.de/10.1594/PANGAEA.833739 Investigator Jess F Adkins jess@gps.caltech.edu Earth Science DEPTH, sediment/rock AGE Thorium-230 Thorium-230, standard deviation Thorium-232 Thorium-232, standard deviation Uranium-238 Uranium-238, standard deviation Thorium-230 excess Thorium-230 excess, standard deviation geoscientificInformation 108-658C Drilling/drill rig Leg108 Inductively coupled plasma - mass spectrometry (ICP-MS) Joides Resolution 1986-03-08 1986-03-08 Complete 20.7492 20.7492 -18.5808 -18.5808 0.03 m (DEPTH, sediment/rock) 3.41 m (DEPTH, sediment/rock) ODP Ocean Drilling Program unrestricted CC-BY-3.0: Creative Commons Attribution 3.0 Unported English PANGAEA Data Publisher for Earth & Environmental Science https://www.pangaea.de/ Data Center Contact Michael Diepenbroek info@pangaea.de

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Bremen Bremen 28359 Germany online 992 data points text/tab-separated-values Adkins, Jess F; deMenocal, Peter B; Eshel, Gidon (2007): Correction to “The “African humid period” and the record of marine upwelling from excess 230 Th in Ocean Drilling Program Hole 658C”. Paleoceanography, 22(1), PA1206, https://doi.org/10.1029/2006PA001388

Using a high-resolution 230Th normalized record of sediment flux, we document the deglacial and Holocene history of North African aridity and coastal upwelling at Ocean Drilling Program Hole 658C. At both the end of the Younger Dryas and after the 8.2 ka event, there are significant drops in terrigenous accumulation at our site, indicating an increase in the monsoon moisture flux over Africa at this time. At 5.5 ka, there is an abrupt end to the "African humid period" and a return to stronger upwelling conditions. For carbonate and opal fluxes the 230Th normalization completely changes the shape of each record based on percentage variations alone. This site is a clear example of how variations in one sediment component can obscure changes in the others, and it demonstrates the need for radionuclide measurements more generally in paleoceanography. By taking our new records and a large amount of previous data from this site we conclude that increases in African moisture are tightly coupled to decreases in coastal upwelling intensity. ** For all details see the full metadata description at "https://doi.pangaea.de/10.1594/PANGAEA.833739"!

http://en.wikipedia.org/wiki/Kyr AGE https://doi.org/10.1029/2005PA001200 The “African humid period” and the record of marine upwelling from excess 230Th in Ocean Drilling Program Hole 658C https://doi.org/10.1029/2006PA001388 Correction to “The “African humid period” and the record of marine upwelling from excess 230 Th in Ocean Drilling Program Hole 658C” https://doi.org/10.2973/odp.proc.ir.108.1988 Leg108 https://www-odp.tamu.edu:443/ ODP https://www-odp.tamu.edu:443/resolutn.html Joides Resolution DIF 9.4 2026-02-06