Sea surface temperature and stable isotopes from 9 cores of the Northeastern Atlantic

Temporal and spatial patterns in eastern North Atlantic sea-surface temperatures (SST) were reconstructed for marine isotope stage (MIS) 11c using a submeridional transect of five sediment cores. The SST reconstructions are based on planktic foraminiferal abundances and alkenone indices, and are sup...

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Bibliographic Details
Main Authors: Kandiano, Evgenia S, Bauch, Henning A, Fahl, Kirsten, Helmke, Jan Peter, Röhl, Ursula, Pérez-Folgado, Marta, Cacho, Isabel
Format: Other/Unknown Material
Language:English
Published: PANGAEA 2012
Subjects:
159-958
161-975
61F
ARK-II/5
CALYPSO
Calypso Corer
Canarias Sea
COMPCORE
Composite Core
Giant box corer
GIK23063-1
GIK23243-1 PS05/431
GIK23414-8
GKG
Gravity corer (Kiel type)
IMAGES V
Jan Mayen Ridge
Joides Resolution
Leg159T
Leg161
M17/2
M2/2
M23414
Marion Dufresne (1995)
MD114
MD99-2277
Meteor (1986)
North Atlantic Ocean
Norwegian Sea
Polarstern
PS05
PS1243-1
SL
Western Basin
Jan Mayen
Nordic Seas
North Atlantic
North Atlantic oscillation
Online Access:https://doi.pangaea.de/10.1594/PANGAEA.780099
https://doi.org/10.1594/PANGAEA.780099
Description
Summary:Temporal and spatial patterns in eastern North Atlantic sea-surface temperatures (SST) were reconstructed for marine isotope stage (MIS) 11c using a submeridional transect of five sediment cores. The SST reconstructions are based on planktic foraminiferal abundances and alkenone indices, and are supported by benthic and planktic stable isotope measurements, as well as by ice-rafted debris content in polar and middle latitudes. Additionally, the larger-scale dynamics of the precipitation regime over northern Africa and the western Mediterranean region was evaluated from iron concentrations in marine sediments off NW Africa and planktic d13C in combination with analysis of planktic foraminiferal abundances down to the species level in the Mediterranean Sea. Compared to the modern situation, it is revealed that during entire MIS 11c sensu stricto (ss), i.e., between 420 and 398 ka according to our age models, a cold SST anomaly in the Nordic seas co-existed with a warm SST anomaly in the middle latitudes and the subtropics, resulting in steeper meridional SST gradients than during the Holocene. Such a SST pattern correlates well with a prevalence of a negative mode of the modern North Atlantic Oscillation. We suggest that our scenario might partly explain the longer duration of wet conditions in the northern Africa during MIS 11c compared to the Holocene.

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