Ziegler, Martin; Tuenter, Erik; Lourens, Lucas Joost (2010): (Table 1) Age control points of ODP Site 160-968 [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.816369, Supplement to: Ziegler, M et al. (2010): The precession phase of the boreal summer monsoon as viewed from the eastern Mediterranean (ODP Site 968). Quaternary Science Reviews, 29(11-12), 1481-1490, https://doi.org/10.1016/j.quascirev.2010.03.011
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Abstract:
The astronomical timescale of the Eastern Mediterranean Plio-Pleistocene builds on tuning of sapropel layers to Northern Hemisphere summer insolation maxima. A 3000-year precession lag has become instrumental in the tuning procedure as radiocarbon dating revealed that the midpoint of the youngest sapropel, S1, in the early Holocene occurred approximately 3000 years after the insolation maximum. The origin of the time lag remains elusive, however, because sapropels are generally linked to maximum African monsoon intensities and transient climate modeling results indicate an in-phase behavior of the African monsoon relative to precession forcing. Here we present new high-resolution records of bulk sediment geochemistry and benthic foraminiferal oxygen isotopes from ODP Site 968 in the Eastern Mediterranean. We show that the 3000-year precession time lag of the sapropel midpoints is consistent with (1) the global marine isotope chronology, (2) maximum (monsoonal) precipitation conditions in the Mediterranean region and China derived from radiometrically dated speleothem records, and (3) maximum atmospheric methane concentrations in Antarctica ice cores. We show that the time lag relates to the occurrence of precession-paced North Atlantic cold events, which systematically delayed the onset of strong boreal summer monsoon intensity. Our findings may also explain a non-stationary behavior of the African monsoon over the past 3 million years due to more frequent and intensive cold events in the Late Pleistocene.
Project(s):
Ocean Drilling Program (ODP)
Coverage:
Latitude: 34.332167 * Longitude: 32.751933
Date/Time Start: 1995-04-09T00:00:00 * Date/Time End: 1995-04-13T00:00:00
Minimum DEPTH, sediment/rock: 0.00 m * Maximum DEPTH, sediment/rock: 17.50 m
Event(s):
160-968 * Latitude: 34.332167 * Longitude: 32.751933 * Date/Time Start: 1995-04-09T00:00:00 * Date/Time End: 1995-04-13T00:00:00 * Elevation: -1962.7 m * Penetration: 333 m * Recovery: 272.7 m * Location: Eastern Basin * Campaign: Leg160 * Basis: Joides Resolution * Method/Device: Composite Core (COMPCORE) * Comment: 38 cores; 333 m cored; 0 m drilled; 81.9% recovery
Comment:
Sediment depth is given in mcd.
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | Ageprofile Datum Description | Ageprof dat des | Ziegler, Martin | |||
| 2 | DEPTH, sediment/rock | Depth sed | m | Geocode | ||
| 3 | Age model | Age model | ka | Ziegler, Martin |
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
48 data points