Dinoflagellate cyst of sediment core M35003-4 southeast of Grenada
| Cobertura |
LATITUDE: 12.090000 * LONGITUDE: -61.243333 * DATE/TIME START: 1996-04-19T00:00:00 * DATE/TIME END: 1996-04-19T00:00:00 |
|---|---|
| Data(s) |
08/03/2001
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| Resumo |
High-resolution, well-dated calcareous dinoflagellate cyst and organic carbon records from a 58 kyr sediment core (M35003-4) located southeast of the island of Grenada show that rapid and pronounced changes in cyst association and accumulation and organic carbon deposition occurred, controlled by (1) a significant southward shift in the position of the North Equatorial Current during the last glacial period and the Younger Dryas cold interval and (2) rapid changes in local productivity in marine isotopic stage 3 that are associated with variations in Orinoco River nutrient discharge and coastal upwelling strength. Prominent cyst accumulation peaks representing extremely oligotrophic and stratified thermocline conditions mimic the Greenland ice core and northern Atlantic Dansgaard/Oeschger stadials and Heinrich events. We provide new evidence for a coupled tropical/high-latitude Atlantic climate system during the last glacial period and suggest that changes in the zonality of the low-latitude winds may play an important role in modulating rapid interhemispheric climate variability. |
| Formato |
application/zip, 2 datasets |
| Identificador |
https://doi.pangaea.de/10.1594/PANGAEA.734812 doi:10.1594/PANGAEA.734812 |
| Idioma(s) |
en |
| Publicador |
PANGAEA |
| Relação |
Vink, Annemiek (2000): Reconstruction of recent and late Quaternary surface water masses of the western subtropical Atlantic Ocean based on calcareous and organic-walled dinoflagellate cysts. Berichte aus dem Fachbereich Geowissenschaften der Universität Bremen, 159, 160 pp, urn:nbn:de:gbv:46-ep000102797 |
| Direitos |
CC-BY: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted |
| Fonte |
Supplement to: Vink, Annemiek; Rühlemann, Carsten; Zonneveld, Karin A F; Mulitza, Stefan; Hüls, Matthias; Willems, Helmut (2001): Shifts in the Position of the North Equatorial Current and Rapid Productivity Changes in the western Tropical Atlantic during the Last Glacial. Paleoceanography, 16(5), 479-490, doi:10.1029/2000PA000582 |
| Palavras-Chave | #Age, 14C milieu/reservoir corrected (-400 yr); Age, dated; Age, dated material; Age, dated standard deviation; Age dated; Age std dev; C. albatrosianum; C. levantinum; Calciodinellum albatrosianum; Calciodinellum levantinum; Calendar years; Cal yrs; Counting, dinoflagellate cysts; Dated material; Depth; DEPTH, sediment/rock; Dinoflagellate cyst indeterminata; Dinofl indet; Gravity corer (Kiel type); L. granifera; Label; Leonella granifera; M. berlinensis; M35/1; M35003-4; Melodomuncula berlinensis; Meteor (1986); P. tuberosa; Pernambugia tuberosa; Rhabdothorax spp.; S. regalis; Sample code/label; Sample mass; Sample volume; Samp m; Samp vol; Scrippsiella regalis; see reference(s); SFB261; size < 20 µm; size < 20 µm, species 1; size < 20 µm, species 3; size > 20 µm; size > 20 µm, species 1; size > 20 µm, species 3; SL; slide vol; Slide volume; South Atlantic in Late Quaternary: Reconstruction of Budget and Currents; T. heimii; Thoracosphaera heimii |
| Tipo |
Dataset |
