Planktonic foraminiferas in bottom sediments and Late Quaternary paleotemperatures of surface waters in the North Tropical Atlantic

Distribution of planktonic foraminiferal tests was studied in 15 Upper Quaternary sediment cores from the continental slope of Africa, the Canary and Cape Verde basins, and slopes of the Mid-Atlantic Ridge. In all the cores substantial variations were found in relationship between foraminiferal plan...

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Bibliographic Details
Main Authors: Barash, Max S, Okuneva, Olga K
Format: Dataset
Language:English
Published: PANGAEA 1981
Subjects:
AK-1715
AK6-434GC
Akademik Kurchatov
AKU6
Archive of Ocean Data
ARCOD
Atlantic Ocean
Canary Upwelling
DRILL
Drilling/drill rig
GC
Gravity corer
Mikhail Lomonosov
ML10
ML10_772
ML12
ML12_909
ML12_985
ML5
ML5-367GR
ML5-369GR
ML7
ML7_475
ML7_483
NKA-37T
NKA-3T
NKA-40T
NKA-4T
OKEAN
Okean Grab
Sedov1-16
Sedov2-27
Tropical Atlantic
Mid-Atlantic Ridge
Online Access:https://doi.pangaea.de/10.1594/PANGAEA.755407
https://doi.org/10.1594/PANGAEA.755407
Description
Summary:Distribution of planktonic foraminiferal tests was studied in 15 Upper Quaternary sediment cores from the continental slope of Africa, the Canary and Cape Verde basins, and slopes of the Mid-Atlantic Ridge. In all the cores substantial variations were found in relationship between foraminiferal planktonic species reflecting fluctuations of mean annual temperatures of surface waters. Temperature difference in temperatures between present time and that of the maximum of the stadial of the last continental glaciation glacial stadial (about 18,000 yrs ago) ranges from 8.5°C in the Canary upwelling region to minimum values of 2.0°C in the central part of the ocean, i.e. the southern part of the subtropical gyre. Temperature difference the Holocene optimum and 18,000 yrs ago ranges from 10°C to 3°C. Age estimates are supported by radiocarbon dates.

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