Age model, raw data and interpolated raw data from proxy records of sediment cores GeoB6007-1 and GeoB6007-2 ...

Here we present a 1200 yr long benthic foraminiferal Mg/Ca based temperature and oxygen isotope record from a ~900 m deep sediment core off northwest Africa to show that atmosphere-ocean interactions in the eastern subpolar gyre are transferred at central water depth into the eastern boundary of the...

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Bibliographic Details
Main Authors: Morley, Audrey, Schulz, Michael, Rosenthal, Yair, Mulitza, Stefan, Paul, André, Rühlemann, Carsten
Format: Article in Journal/Newspaper
Language:English
Published: PANGAEA 2011
Subjects:
MultiCorer
Gravity corer Kiel type
M45/5a
Meteor 1986
Center for Marine Environmental Sciences MARUM
Integrierte Analyse zwischeneiszeitlicher Klimadynamik INTERDYNAMIK
North Atlantic
Online Access:https://dx.doi.org/10.1594/pangaea.770724
https://doi.pangaea.de/10.1594/PANGAEA.770724
Description
Summary:Here we present a 1200 yr long benthic foraminiferal Mg/Ca based temperature and oxygen isotope record from a ~900 m deep sediment core off northwest Africa to show that atmosphere-ocean interactions in the eastern subpolar gyre are transferred at central water depth into the eastern boundary of the subtropical gyre. Further we link the variability of the NAO (over the past 165 yrs) and solar irradiance (Late Holocene) and their control on subpolar mode water formation to the multidecadal variability observed at mid-depth in the eastern subtropical gyre. Our results show that eastern North Atlantic central waters cooled by up to ~0.8± 0.7 °C and densities decreased by Sigma theta=0.3±0.2 during positive NAO years and during minima in solar irradiance during the Late Holocene. The presented records demonstrate the sensitivity of central water formation to enhanced atmospheric forcing and ice/freshwater fluxes into the eastern subpolar gyre and the importance of central water circulation for cross-gyre climate ...

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