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Kaiser, Jérôme; Lamy, Frank (2010): (Table 1) Age determination of ODP Site 202-1233. PANGAEA, https://doi.org/10.1594/PANGAEA.816371, Supplement to: Kaiser, J; Lamy, F (2010): Links between Patagonian Ice Sheet fluctuations and Anarctic dust variability during the last glacial period (MIS 4-2). Quaternary Science Reviews, 29(11-12), 1464-1471, https://doi.org/10.1016/j.quascirev.2010.03.005

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Abstract:
Antarctic and Greenland ice-core records reveal large fluctuations of dust input on both orbital and millennial time-scales with potential global climate implications. At least during glacial periods, the Antarctic dust fluctuations appear to be largely controlled by environmental changes in southern South America. We compare dust flux records from two Antarctic ice-cores to variations in the composition of the terrigenous supply at ODP Site 1233 located off southern Chile and known to record fluctuations in the extent of the northern part of the Patagonian ice-sheet (NPIS) during the last glacial period (Marine Isotope Stage, MIS, 4 to 2). Within age uncertainties, millennial-scale glacial advances (retreats) of the NPIS correlate to Antarctic dust maxima (minima). In turn, NPIS fluctuations were closely related to offshore sea surface temperature (SST) changes. This pattern suggests a causal link involving changes in temperature, in rock flour availability, in latitudinal extensions of the westerly winds and in foehn winds in the southern Pampas and Patagonia. We further suggest that the long-term trend of dust accumulation is partly linked to the sea-level related changes in the size if the Patagonian source area due to the particular morphology of the Argentine shelf. We suggest that sea-level drops at the beginning of MIS 4 and MIS 2 were important for long-term dust increases, while changes in the Patagonian dust source regions primarily control the early dust decrease during the MIS 4/3 transition and Termination 1.
Related to:
Blunier, Thomas; Brook, Edward J (2001): Timing of millennial-scale climate change in Antarctica and Greenland during the last glacial period. Science, 291(5501), 109-112, https://doi.org/10.1126/science.291.5501.109
Fairbanks, Richard G; Mortlock, Richard A; Chiu, Tzu-Chien; Cao, L; Kaplan, Alexey; Guilderson, Thomas P; Fairbanks, Todd W; Bloom, Arthur L; Grootes, Pieter Meiert; Nadeau, Marie-Josée (2005): Radiocarbon calibration curve spanning 0 to 50,000 years BP based on paired 230Th/234U/238U and 14C dates on pristine corals. Quaternary Science Reviews, 24(16-17), 1781-1796, https://doi.org/10.1016/j.quascirev.2005.04.007
Kaiser, Jérôme; Lamy, Frank; Hebbeln, Dierk (2005): A 70-kyr sea surface temperature record off southern Chile (Ocean Drilling Programm Site 1233). Paleoceanography, 20(4), PA4009, https://doi.org/10.1029/2005PA001146
Lamy, Frank; Kaiser, Jérôme; Arz, Helge W; Hebbeln, Dierk; Ninnemann, Ulysses S; Timm, Oliver; Timmermann, Axel; Toggweiler, J Robert (2007): Modulation of the bipolar seesaw in the Southeast Pacific during Termination 1. Earth and Planetary Science Letters, 259(3-4), 400-413, https://doi.org/10.1016/j.epsl.2007.04.040
Lamy, Frank; Kaiser, Jérôme; Ninnemann, Ulysses S; Hebbeln, Dierk; Arz, Helge W; Stoner, Joseph S (2004): Antarctic timing of surface water changes off Chile and Patagonian ice-sheet response. Science, 304(5679), 1959-1962, https://doi.org/10.1126/science.1097863
Project(s):
Coverage:
Latitude: -41.000080 * Longitude: -74.449860
Date/Time Start: 2002-04-12T00:00:00 * Date/Time End: 2002-04-12T00:00:00
Minimum DEPTH, sediment/rock: 25.10 m * Maximum DEPTH, sediment/rock: 133.75 m
Event(s):
202-1233 * Latitude: -41.000080 * Longitude: -74.449860 * Date/Time: 2002-04-12T00:00:00 * Elevation: -838.0 m * Penetration: 451.6 m * Recovery: 422.2 m * Location: South-East Pacific * Campaign: Leg202 * Basis: Joides Resolution * Device: Composite Core (COMPCORE) * Comment: cores; 411 m cored; 40.6 m drilled; 102.7 % recovery
Comment:
Sediment depth is given in mcd. Calibartion: "CalPal SFCP 2005" calibration curve (http://www.calpal.de); “INTCAL04” calibration curve (Reimer et al., 2004) (http://intcal.qub.ac.uk/calib/); “Fairbanks0107” calibration curve (Fairbanks et al., 2005) (http://radiocarbon.ldeo.columbia.edu/).
Parameter(s):
#NameShort NameUnitPrincipal InvestigatorMethodComment
1DEPTH, sediment/rockDepthmGeocode
2Age, datedAge datedkaKaiser, JérômeAge, 14C AMS
3Age, dated standard deviationAge dated std dev±Kaiser, JérômeAge, 14C AMS
4Calendar ageCal ageka BPKaiser, JérômeAge, 14C calibrated
5Calendar age, standard deviationCal age std dev±Kaiser, JérômeAge, 14C calibrated
6Method commentMethod commKaiser, Jérôme
7Reference/sourceReferenceKaiser, Jérôme
8Age, commentCommKaiser, Jérôme
Size:
132 data points

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