Late Quaternary variability of Mediterranean Outflow Water from radiogenic Nd and Pb isotopes.

Stumpf, Roland, Frank, Martin, Schönfeld, Joachim and Haley, Brian A. (2010) Late Quaternary variability of Mediterranean Outflow Water from radiogenic Nd and Pb isotopes. Quaternary Science Reviews, 29 (19/20). pp. 2462-2472. DOI 10.1016/j.quascirev.2010.06.021.

[img] Text
Stumpf.pdf - Published Version
Restricted to Registered users only

Download (899Kb)

Supplementary data:

Abstract

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 MOWbut 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.

Document Type: Article
Additional Information: Leg MSM1/3 nicht vorhanden
Keywords: Paleoceanography; Mediterranean Outflow Water; RV Meteor, M39/1, RV Poseidon, POS287, RV Maria S. Merian, MSM1/3
Research affiliation: OceanRep > GEOMAR > FB1 Ocean Circulation and Climate Dynamics > FB1-P-OZ Paleo-Oceanography
OceanRep > The Future Ocean - Cluster of Excellence
Refereed: Yes
Open Access Journal?: No
DOI etc.: 10.1016/j.quascirev.2010.06.021
ISSN: 0277-3791
Projects: Future Ocean
Expeditions/Models/Experiments:
Date Deposited: 30 Aug 2010 07:55
Last Modified: 16 Sep 2016 08:31
URI: http://oceanrep.geomar.de/id/eprint/8814

Actions (login required)

View Item View Item

Document Downloads

More statistics for this item...