de Garidel-Thoron, Thibault; Beaufort, Luc; Linsley, Braddock K; Dannenmann, Stefanie (2001): (Table 1) Age determination of sediment core MD97-2141 [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.846603, Supplement to: de Garidel-Thoron, T et al. (2001): Millennial-scale dynamics of the east Asian winter monsoon during the last 200,000 years. Paleoceanography, 16(5), 491-502, https://doi.org/10.1029/2000PA000557
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Abstract:
The primary productivity dynamics of the last 200,000 years in the Sulu Sea was reconstructed using the abundance of the coccolithophore Florisphaera profunda in the IMAGES MD97-2141 core. We find that primary productivity was enhanced during glacial periods, which we suggest is due to a stronger East Asian winter monsoon. During the last 80 kyr, eight significant increases in primary productivity (PP) in the Sulu Sea are similar to East Asian winter monsoon changes recorded in Chinese loess. The PP maxima are not linked with Heinrich events (HE) in the North Atlantic, although four PP peaks are synchronous with HE. The PP oscillations have frequencies near those of the Dansgaard-Oeschger cycles in Northern Hemisphere ice records and indicate a teleconnection of the East Asian winter monsoon with Greenland climate. In this Sulu Sea record the East Asian winter monsoon oscillates with periodicities of ~6, 4.2-3.4, 2.3, and 1.5 kyr. In particular, the 1.5 kyr cycle exhibits a strong and pervasive signal from stage 6 to the Holocene without any ice volume modulation. This stationarity suggests that the 1.5 kyr cycle is not driven by some high-latitude forcing.
Further details:
Bard, Edouard; Arnold, Maurice; Fairbanks, Richard G; Hamelin, Bruno (1993): Thorium-230/uranium-234 and carbon-14 ages obtained by mass spectrometry on corals. Radiocarbon, 35(1), 191-199, https://doi.org/10.1017/S0033822200013886
Stuiver, Minze; Braziunas, Thomas F (1993): Modelling atmospheric 14C influences and 14C ages of marine samples to 10,000 BC. Radiocarbon, 35(1), 137-189, https://doi.org/10.1017/S0033822200013874
Coverage:
Latitude: 8.786000 * Longitude: 141.295000
Minimum DEPTH, sediment/rock: 0.010 m * Maximum DEPTH, sediment/rock: 22.000 m
Event(s):
MD97-2141 (MD972141) * Latitude: 8.786000 * Longitude: 141.295000 * Recovery: 36.3 m * Campaign: MD106 (IMAGES III - IPHIS) * Basis: Marion Dufresne (1995) * Method/Device: Calypso Corer (CALYPSO)
Comment:
Calendar ages have been calculated using a 400 year reservoir correction and applying the Stuiver and Braziunas (1993) calibration curve for samples younger than 20,000 calendar years in age and a U/Th calibration curve for the samples older than 20,000 calendar years (Bard et al., 2993).
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | DEPTH, sediment/rock | Depth sed | m | de Garidel-Thoron, Thibault | Geocode | |
| 2 | Age, dated | Age dated | ka | de Garidel-Thoron, Thibault | ||
| 3 | Age, dated standard deviation | Age dated std dev | ± | de Garidel-Thoron, Thibault | Age, 14C AMS | |
| 4 | Calendar age | Cal age | ka BP | de Garidel-Thoron, Thibault | Age, 14C AMS | |
| 5 | Age, dated material | Dated material | de Garidel-Thoron, Thibault | Age, 14C calibrated | ||
| 6 | Laboratory code/label | Lab label | de Garidel-Thoron, Thibault | |||
| 7 | Age, comment | Comm | de Garidel-Thoron, Thibault |
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
162 data points