Stumpf, Roland; Frank, Martin; Schönfeld, Joachim; Haley, Brian A (2010): Nd, Pb and Sr isotopes in sediment cores from the Gulf of Cadiz and the Portuguese margin. PANGAEA, https://doi.org/10.1594/PANGAEA.774216, Supplement to: Stumpf, R et al. (2010): Late Quaternary variability of Mediterranean Outflow Water from radiogenic Nd and Pb isotopes. Quaternary Science Reviews, 29(19-20), 2462-2472, https://doi.org/10.1016/j.quascirev.2010.06.021
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Mediterranean Outflow Water (MOW) is characterised by higher temperatures and salinities than other ambient water masses. MOW spreads at water depths between 500 and 1500 m in the eastern North Atlantic and has been a source of salinity for the Atlantic Meridional Overturning Circulation in the North Atlantic. We used high-resolution Nd and Pb isotope records of past ambient seawater obtained from authigenic ferromanganese coatings of sediments in three gravity cores at 577, 1745 and 1974 m water depth in the Gulf of Cadiz and along the Portuguese margin complemented by a selection of surface sediments to reconstruct the extent and pathways of MOWover the past 23 000 years. The surface and downcore Nd isotope data from all water depths exhibit only a very small variability close to the present day composition of MOW but do not reflect the present day Nd isotopic stratification of the water column as determined from a nearby open ocean hydrographic station. In contrast, the Pb isotope records show significant and systematic variations, which provide evidence for a significantly different pattern of the MOW pathways between 20 000 and 12 000 years ago compared with the subsequent period of time.
Median Latitude: 37.869499 * Median Longitude: -8.589775 * South-bound Latitude: 35.289250 * West-bound Longitude: -10.680000 * North-bound Latitude: 41.291000 * East-bound Longitude: -6.618600
Date/Time Start: 1997-01-01T00:00:00 * Date/Time End: 2006-05-15T09:32:00
LV044-316 * Latitude: 36.870000 * Longitude: -8.170000 * Date/Time: 1997-01-01T00:00:00 * Elevation: -84.0 m
M39/1_08-3 (M39008-3) * Latitude: 36.380000 * Longitude: -7.071667 * Date/Time: 1997-04-24T14:30:00 * Elevation: -577.0 m * Recovery: 5.77 m * Campaign: M39/1 * Basis: Meteor (1986) * Method/Device: Gravity corer (Kiel type) (SL)
Datasets listed in this publication series
- Stumpf, R; Frank, M; Schönfeld, J et al. (2010): (Table 1) Nd and Sr isotope ratios of surface sediments from the Gulf of Cadiz and the Portuguese margin. https://doi.org/10.1594/PANGAEA.774209
- Stumpf, R; Frank, M; Schönfeld, J et al. (2010): (Table 2) Pb isotope ratios of surface sediments from the Gulf of Cadiz and the Portuguese margin. https://doi.org/10.1594/PANGAEA.774210
- Stumpf, R; Frank, M; Schönfeld, J et al. (2010): (Table 3) Nd and Pb isotope records of sediment cores from the Gulf of Cadiz and the Portuguese margin. https://doi.org/10.1594/PANGAEA.774215