de.pangaea.dataset833739 und dataset PANGAEA
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https://www.pangaea.de/ information pointOfContact 2026-02-06T11:07:21Z https://doi.pangaea.de/10.1594/PANGAEA.833739 <gco:CharacterString>(Table 1) Radionuclide content in ODP Hole 108-658C</gco:CharacterString> 2006-01-01 publication https://doi.org/10.1594/PANGAEA.833739 Adkins, Jess F
jess@gps.caltech.edu
https://orcid.org/0000-0002-3174-5190 information author deMenocal, Peter B
pdemenocal@whoi.edu
https://orcid.org/0000-0002-7191-717X information author Eshel, Gidon author PANGAEA
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https://www.pangaea.de/ information publisher tableDigital 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 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. completed Adkins, Jess F
jess@gps.caltech.edu
https://orcid.org/0000-0002-3174-5190 information principalInvestigator ODP Ocean Drilling Program theme <gco:CharacterString>PANGAEA Project List</gco:CharacterString> 1995-01-01 creation PANGAEA
info@pangaea.de
https://www.pangaea.de/ information pointOfContact copyright copyright CC-BY-3.0: Creative Commons Attribution 3.0 Unported textTable und geoscientificInformation -18.5808 -18.5808 20.7492 20.7492 1986-03-08T00:45:00 1986-03-08T16:00:00 0.03 3.41 DEPTH, sediment/rock physicalMeasurement m m AGE physicalMeasurement ka BP ka BP Thorium-230 physicalMeasurement Inductively coupled plasma - mass spectrometry (ICP-MS) dpm/g dpm/g Thorium-230, standard deviation physicalMeasurement Inductively coupled plasma - mass spectrometry (ICP-MS); 1 sigma error ± ± Thorium-232 physicalMeasurement Inductively coupled plasma - mass spectrometry (ICP-MS) dpm/g dpm/g Thorium-232, standard deviation physicalMeasurement Inductively coupled plasma - mass spectrometry (ICP-MS); 1 sigma error ± ± Uranium-238 physicalMeasurement Inductively coupled plasma - mass spectrometry (ICP-MS) dpm/g dpm/g Uranium-238, standard deviation physicalMeasurement Inductively coupled plasma - mass spectrometry (ICP-MS); 1 sigma error ± ± Thorium-230 excess physicalMeasurement Inductively coupled plasma - mass spectrometry (ICP-MS) dpm/g dpm/g Thorium-230 excess, standard deviation physicalMeasurement Inductively coupled plasma - mass spectrometry (ICP-MS); 1 sigma error ± ± text/tab-separated-values unknown https://doi.pangaea.de/10.1594/PANGAEA.833739?format=textfile download dataset The data set was checked for completeness, correctness, and consistency of metainformation. Validity of used methods was checked and - if applicable - precision and range of data. EVENT LABEL: 108-658C * LATITUDE: 20.749200 * LONGITUDE: -18.580800 * DATE/TIME START: 1986-03-08T00:45:00 * DATE/TIME END: 1986-03-08T16:00:00 * ELEVATION: -2273.0 m * Penetration: 72.9 m * Recovery: 70.38 m * LOCATION: Canarias Sea * CAMPAIGN: Leg108 * BASIS: Joides Resolution * METHOD/DEVICE: Drilling/drill rig 8 cores; 72.9 m cored; 0 m drilled; 96.5 % recovery 1986-03-08T00:45:00 Related to <gco:CharacterString>Correction to “The “African humid period” and the record of marine upwelling from excess 230 Th in Ocean Drilling Program Hole 658C”</gco:CharacterString> 2007-01-01 publication https://doi.org/10.1029/2006PA001388 Adkins, Jess F
jess@gps.caltech.edu
https://orcid.org/0000-0002-3174-5190 information author deMenocal, Peter B
pdemenocal@whoi.edu
https://orcid.org/0000-0002-7191-717X information author Eshel, Gidon author documentDigital Paleoceanography 22(1) PA1206