Not logged in
PANGAEA.
Data Publisher for Earth & Environmental Science

Frigola, Jaime; Moreno, Ana; Cacho, Isabel; Canals, Miquel; Sierro, Francisco Javier; Flores, José-Abel; Grimalt, Joan O (2008): High-resolution marine record of sediment core MD99-2343 in the Balearic Sea [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.759537, Supplement to: Frigola, J et al. (2008): Evidence of abrupt changes in Western Mediterranean Deep Water circulation during the last 50 kyr: A high-resolution marine record from the Balearic Sea. Quaternary International, 181(1), 88-104, https://doi.org/10.1016/j.quaint.2007.06.016

Always quote citation above when using data! You can download the citation in several formats below.

RIS CitationBibTeX CitationShow MapGoogle Earth

Abstract:
The IMAGES core MD99-2343, recovered from a sediment drift north of the island of Minorca, in the north-western Mediterranean Sea, holds a high-resolution sequence that is perfectly suited to study the oscillations of the overturning system of the Western Mediterranean Deep Water (WMDW). Detailed analysis of grain-size and bulk geochemical composition reveals the sensitivity of this region to climate changes at both orbital and centennial-millennial temporal scales during the last 50 kyr. The dominant orbital pattern in the K/Al record indicates that sediment supply to the basin was controlled by the insolation evolution at 40°N, which forced changes in the fluvial regime, with more efficient sediment transport during insolation maxima. This orbital control also modulated the long-term pattern of the WMDW intensity as illustrated by the silt/clay ratio.
However, deep convection was particularly sensitive to climatic changes at shorter time-scales, i.e. to centennial-millennial glacial and Holocene oscillations that are well documented by all the paleocurrent intensity proxies (Si/Al, Ti/Al and silt/clay ratios). Benthic isotopic records (d13C and d18O) show a Dansgaard-Oeschger (D-O) pattern of variability of WMDW properties, which can be associated with changing intensities of the deep currents system. The most prominent reduction on the WMDW overturning was caused by the post-glacial sea level rise.
Three main scenarios of WMDW overturning are revealed: a strong mode during D-O Stadials, a weak mode during D-O Interstadials and an intermediate mode during cooling transitions. In addition, D-O Stadials associated with Heinrich events (HEs) have a very distinct signature as the strong mode of circulation, typical for the other D-O Stadials, was never reached during HE due to the surface freshening induced by the inflowing polar waters. Consequently, the WMDW overturning system oscillated around the intermediate mode of circulation during HE. Though surface conditions were more stable during the Holocene, the WMDW overturning cell still reacted synchronously to short-lived events, as shown by increments in the planktonic d18O record, triggering quick reinforcements of the deep water circulation. Overall, these results highlight the sensitivity of the WMDW to rapid climate change which in the recent past were likely induced by oceanographic and atmospheric reorganizations in the North Atlantic region.
Related to:
Frigola, Jaime; Moreno, Ana; Cacho, Isabel; Sierro, Francisco Javier; Flores, José-Abel; Grimalt, Joan O; Hodell, David A; Curtis, Jason H (2007): Holocene climate variability in the western Mediterranean region from a deepwater sediment record. Paleoceanography, 22(2), PA2209, https://doi.org/10.1029/2006PA001307
Sierro, Francisco Javier; Hodell, David A; Curtis, Jason H; Flores, José-Abel; Reguera, Maria Isabel; Colmenero-Hidalgo, Elena; Bárcena, María Angeles; Grimalt, Joan O; Cacho, Isabel; Frigola, Jaime; Canals, Miquel (2005): Impact of iceberg melting on Mediterranean thermohaline circulation during Heinrich events. Paleoceanography, 20(2), PA2019, https://doi.org/10.1029/2004PA001051
Project(s):
International Marine Global Change Study (IMAGES)
Coverage:
Latitude: 40.497333 * Longitude: 4.028167
Date/Time Start: 1999-09-17T00:00:00 * Date/Time End: 1999-09-17T00:00:00
Event(s):
MD99-2343 (98) * Latitude: 40.497333 * Longitude: 4.028167 * Date/Time: 1999-09-17T00:00:00 * Elevation: -2391.0 m * Recovery: 32 m * Location: North Minorca * Campaign: MD114 (IMAGES V) * Basis: Marion Dufresne (1995) * Method/Device: Calypso Corer (CALYPSO) * Comment: Calypso/42m/splitted/Mars (Esp)/22 sections
Comment:
Parts of the high resolution record (0-12 ka) have been published in Frigola et al. (2007).
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
9 datasets

Download Data

Download ZIP file containing all datasets as tab-delimited text — use the following character encoding:

Datasets listed in this publication series

  1. Frigola, J; Moreno, A; Cacho, I et al. (2008): (Table 1) Tie points used for the age model of sediment core MD99-2343. https://doi.org/10.1594/PANGAEA.759528
  2. Frigola, J; Moreno, A; Cacho, I et al. (2008): (Fig. 3) Al, Ti, Ca, and K geochemical record of sediment core MD99-2343. https://doi.org/10.1594/PANGAEA.759531
  3. Frigola, J; Moreno, A; Cacho, I et al. (2008): (Fig. 2) Stable oxygen isotope record of Globigerina bulloides of sediment core MD99-2343. https://doi.org/10.1594/PANGAEA.759529
  4. Frigola, J; Moreno, A; Cacho, I et al. (2008): (Fig. 4) Median grain-size record, silt/clay ratio and UP10 fraction of the non-carbonate fraction of sediment core MD99-2343. https://doi.org/10.1594/PANGAEA.759535
  5. Frigola, J; Moreno, A; Cacho, I et al. (2008): (Fig. 4) Median grain-size record, silt/clay ratio and UP10 fraction of the total fraction of sediment core MD99-2343. https://doi.org/10.1594/PANGAEA.759534
  6. Frigola, J; Moreno, A; Cacho, I et al. (2008): (Fig. 3) Relative abundance of Emiliania huxleyi in sediment core MD99-2343. https://doi.org/10.1594/PANGAEA.759533
  7. Frigola, J; Moreno, A; Cacho, I et al. (2008): (Fig. 5) Stable carbon and oxygen isotope record of Cibicidoides pachyderma of sediment core MD99-2343. https://doi.org/10.1594/PANGAEA.759536
  8. Frigola, J; Moreno, A; Cacho, I et al. (2008): (Fig. 2) Linear sedimentation rates of sediment core MD99-2343. https://doi.org/10.1594/PANGAEA.759530
  9. Frigola, J; Moreno, A; Cacho, I et al. (2008): (Fig. 3) Relative abundance of Neogloboquadrina pachyderma (s) in sediment core MD99-2343. https://doi.org/10.1594/PANGAEA.759532