Adkins Jess F jess@gps.caltech.edu 0000-0002-3174-5190 deMenocal Peter B pdemenocal@whoi.edu 0000-0002-7191-717X Eshel Gidon 2006 (Table 1) Radionuclide content in ODP Hole 108-658C dataset https://doi.org/10.1594/PANGAEA.833739 Adkins Jess F jess@gps.caltech.edu 0000-0002-3174-5190 deMenocal Peter B pdemenocal@whoi.edu 0000-0002-7191-717X Eshel Gidon 2006 The “African humid period” and the record of marine upwelling from excess 230Th in Ocean Drilling Program Hole 658C journal article Paleoceanography 21(4) https://doi.org/10.1029/2005PA001200 PA4203 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. Adkins Jess F jess@gps.caltech.edu 0000-0002-3174-5190 deMenocal Peter B pdemenocal@whoi.edu 0000-0002-7191-717X 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” journal article Paleoceanography 22(1) https://doi.org/10.1029/2006PA001388 PA1206 -18.5808 -18.5808 20.7492 20.7492 -18.5808 20.7492 1986-03-08T00:45:00 1986-03-08T16:00:00 0.03 3.41 not specified ODP Ocean Drilling Program https://www-odp.tamu.edu:443/ Ocean Drilling Program, Texas A&M University ODP http://www-odp.tamu.edu/ https://ror.org/01f5ytq51 108-658C 20.7492 -18.5808 -2273.0 1986-03-08T00:45:00 1986-03-08T16:00:00 72.9 m 70.38 m Canarias Sea Leg108 https://doi.org/10.2973/odp.proc.ir.108.1988 Ruddiman, William F Sarnthein, Michael 1986-02-18 1986-04-17 Joides Resolution https://www-odp.tamu.edu:443/resolutn.html Drilling/drill rig DRILL 8 cores; 72.9 m cored; 0 m drilled; 96.5 % recovery 992 CC-BY-3.0 Creative Commons Attribution 3.0 Unported https://creativecommons.org/licenses/by/3.0/ DEPTH, sediment/rock Depth sed m depth http://purl.obolibrary.org/obo/PATO_0001595 sediment http://purl.obolibrary.org/obo/ENVO_00002007 rock Length L http://dbpedia.org/resource/Length Depth sed [m] AGE Age ka BP http://en.wikipedia.org/wiki/Kyr age http://purl.obolibrary.org/obo/PATO_0000011 Time T http://dbpedia.org/resource/Time Age [ka BP] Thorium-230 230Th dpm/g thorium-230 230Th https://en.wikipedia.org/wiki/Isotopes_of_thorium#Thorium-230 Inductively coupled plasma - mass spectrometry (ICP-MS) Chromatographs & spectrometers inductively-coupled plasma mass spectrometers http://vocab.nerc.ac.uk/collection/L05/current/LAB15/ Adkins Jess F jess@gps.caltech.edu 0000-0002-3174-5190 230Th [dpm/g] Thorium-230, standard deviation 230Th std dev ± thorium-230 230Th https://en.wikipedia.org/wiki/Isotopes_of_thorium#Thorium-230 standard deviation std dev https://en.wikipedia.org/wiki/Standard_deviation Inductively coupled plasma - mass spectrometry (ICP-MS) Chromatographs & spectrometers inductively-coupled plasma mass spectrometers http://vocab.nerc.ac.uk/collection/L05/current/LAB15/ Adkins Jess F jess@gps.caltech.edu 0000-0002-3174-5190 1 sigma error 230Th std dev [±] Thorium-232 232Th dpm/g thorium-232 232Th https://en.wikipedia.org/wiki/Isotopes_of_thorium Inductively coupled plasma - mass spectrometry (ICP-MS) Chromatographs & spectrometers inductively-coupled plasma mass spectrometers http://vocab.nerc.ac.uk/collection/L05/current/LAB15/ Adkins Jess F jess@gps.caltech.edu 0000-0002-3174-5190 232Th [dpm/g] Thorium-232, standard deviation 232Th std dev ± thorium-232 232Th https://en.wikipedia.org/wiki/Isotopes_of_thorium standard deviation std dev https://en.wikipedia.org/wiki/Standard_deviation Inductively coupled plasma - mass spectrometry (ICP-MS) Chromatographs & spectrometers inductively-coupled plasma mass spectrometers http://vocab.nerc.ac.uk/collection/L05/current/LAB15/ Adkins Jess F jess@gps.caltech.edu 0000-0002-3174-5190 1 sigma error 232Th std dev [±] Uranium-238 238U dpm/g uranium-238 238U https://en.wikipedia.org/wiki/Isotopes_of_uranium Inductively coupled plasma - mass spectrometry (ICP-MS) Chromatographs & spectrometers inductively-coupled plasma mass spectrometers http://vocab.nerc.ac.uk/collection/L05/current/LAB15/ Adkins Jess F jess@gps.caltech.edu 0000-0002-3174-5190 238U [dpm/g] Uranium-238, standard deviation 238U std dev ± uranium-238 238U https://en.wikipedia.org/wiki/Isotopes_of_uranium standard deviation std dev https://en.wikipedia.org/wiki/Standard_deviation Inductively coupled plasma - mass spectrometry (ICP-MS) Chromatographs & spectrometers inductively-coupled plasma mass spectrometers http://vocab.nerc.ac.uk/collection/L05/current/LAB15/ Adkins Jess F jess@gps.caltech.edu 0000-0002-3174-5190 1 sigma error 238U std dev [±] Thorium-230 excess 230Th xs dpm/g Inductively coupled plasma - mass spectrometry (ICP-MS) Chromatographs & spectrometers inductively-coupled plasma mass spectrometers http://vocab.nerc.ac.uk/collection/L05/current/LAB15/ Adkins Jess F jess@gps.caltech.edu 0000-0002-3174-5190 230Th xs [dpm/g] Thorium-230 excess, standard deviation 230Th xs std dev ± standard deviation std dev https://en.wikipedia.org/wiki/Standard_deviation Inductively coupled plasma - mass spectrometry (ICP-MS) Chromatographs & spectrometers inductively-coupled plasma mass spectrometers http://vocab.nerc.ac.uk/collection/L05/current/LAB15/ Adkins Jess F jess@gps.caltech.edu 0000-0002-3174-5190 1 sigma error 230Th xs std dev [±] supplement citable author20000 author52139 author797 basis5 campaign80 event13330 geocode1 geocode1599 geocode1600 geocode1601 geocode2205 geocode8128 inst34 journal12511 license101 method10974 method125 param103 param104 param1553 param1554 param4949 param791 param792 param98 pi20000 project3 ref64503 ref64504 term1073131 term1073135 term22477 term2299496 term37764 term38263 term40009 term40741 term40744 term41056 term43863 term43975 term68027 topotype1