Margari, Vasiliki; Skinner, Luke C; Hodell, David A; Martrat, Belén; Toucanne, Samuel; Grimalt, Joan O; Gibbard, Philip L; Lunkka, Juha Pekka; Tzedakis, Polychronis C (2014): (Fig. 1D, 3E) Sea surface temperature and alkenone C37:4 for sediment core MD01-2444 during the penultimate glaciation [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.829611, Supplement to: Margari, V et al. (2014): Land-ocean changes on orbital and millennial time scales and the penultimate glaciation. Geology, 42(3), 183-186, https://doi.org/10.1130/G35070.1
Always quote citation above when using data! You can download the citation in several formats below.
Abstract:
Past glacials can be thought of as natural experiments in which variations in boundary conditions influenced the character of climate change. However, beyond the last glacial, an integrated view of orbital- and millennial-scale changes and their relation to the record of glaciation has been lacking. Here, we present a detailed record of variations in the land-ocean system from the Portuguese margin during the penultimate glacial and place it within the framework of ice-volume changes, with particular reference to European ice-sheet dynamics. The interaction of orbital- and millennial-scale variability divides the glacial into an early part with warmer and wetter overall conditions and prominent climate oscillations, a transitional mid-part, and a late part with more subdued changes as the system entered a maximum glacial state. The most extreme event occurred in the mid-part and was associated with melting of the extensive European ice sheet and maximum discharge from the Fleuve Manche river. This led to disruption of the meridional overturning circulation, but not a major activation of the bipolar seesaw. In addition to stadial duration, magnitude of freshwater forcing, and background climate, the evidence also points to the influence of the location of freshwater discharges on the extent of interhemispheric heat transport.
Related to:
Hodell, David A; Crowhurst, Simon J; Skinner, Luke C; Tzedakis, Polychronis C; Margari, Vasiliki; Channell, James E T; Kamenov, George D; Maclachlan, Suzanne; Rothwell, Robin Guy (2013): Response of Iberian Margin sediments to orbital and suborbital forcing over the past 420 ka. Paleoceanography, 28(1), 185-199, https://doi.org/10.1002/palo.20017
Margari, Vasiliki; Skinner, Luke C; Tzedakis, Polychronis C; Ganopolski, Andrey; Vautravers, Maryline J; Shackleton, Nicholas J (2010): The nature of millennial-scale climate variability during the past two glacial periods. Nature Geoscience, 3(2), 127-131, https://doi.org/10.1038/ngeo740
Martrat, Belén; Grimalt, Joan O; Shackleton, Nicholas J; de Abreu, Lucia; Hutterli, Manuel A; Stocker, Thomas F (2007): Four climate cycles of recurring deep and surface water destabilizations on the Iberian Margin. Science, 317(5837), 502-507, https://doi.org/10.1126/science.1139994
Coverage:
Latitude: 37.565000 * Longitude: -10.134000
Minimum DEPTH, sediment/rock: 21.93 m * Maximum DEPTH, sediment/rock: 26.67 m
Event(s):
MD01-2444 * Latitude: 37.565000 * Longitude: -10.134000 * Elevation: -2656.0 m * Campaign: MD123 (GEOSCIENCES, MARMARCORE) * Basis: Marion Dufresne (1995) * Method/Device: Calypso Corer (CALYPSO)
Comment:
Research co-funded by The European Social Fund (ESF).
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | DEPTH, sediment/rock | Depth sed | m | Geocode | ||
| 2 | AGE | Age | ka BP | Geocode | ||
| 3 | Sea surface temperature, annual mean | SST (1-12) | °C | Martrat, Belén | Calculated from UK'37 (Müller et al, 1998) | |
| 4 | Alkenone, C37:4 | C37:4 | % | Martrat, Belén |
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
318 data points