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  4. Dinoflagellaten-Zysten als Paläoumweltindikatoren im Spätquartär des Europäischen Nordmeeres
 
Zitierlink URN
https://nbn-resolving.de/urn:nbn:de:gbv:46-diss000108583

Dinoflagellaten-Zysten als Paläoumweltindikatoren im Spätquartär des Europäischen Nordmeeres

Veröffentlichungsdatum
2007-11-07
Autoren
Baumann, Astrid  
Betreuer
Thiede, Jörn  
Gutachter
Willems, Helmut  
Zusammenfassung
Dinoflagellate cysts have been investigated in nine short sediment cores as well as two long sediment cores from the Norwegian-Greenland Sea and the North Atlantic to reconstruct the surface water paleoenvironment of the last climatic cycle and the Holocene. Holocene sea-surface temperatures and salinities during summer and winter and the extent of sea-ice cover were reconstructed. On the Rockall Plateau, higher cyst concentrations indicating favourable conditions and increased productivity only occur during parts of stage 5, 4-2, and the Holocene. Only sparse occurrences of dinocysts have been observed in the Norwegian-Greenland Sea before 10000 yr BP. Later, high abundances of O. centrocarpum and N. labyrinthus indicate the increased inflow of relatively warm Atlantic. A change in dominance of these species as well as a distinct increase in cyst concentrations marks the onset of the recent circulation system. In the Norwegian Sea, O. centrocarpum dominates the assemblages since about 7000 yr BP, while assemblages in the Iceland and the Greenland Sea are more complex due to the influence of different surface currents.
Schlagwörter
Dinoflagellate cysts

; 

paleoceanography

; 

paleoenvironment

; 

Late Quaternary

; 

Norwegian-Greenland Sea
Institution
Universität Bremen  
Fachbereich
Fachbereich 05: Geowissenschaften (FB 05)  
Dokumenttyp
Dissertation
Zweitveröffentlichung
Nein
Sprache
Deutsch
Dateien
Lade...
Vorschaubild
Name

00010858.pdf

Size

4.02 MB

Format

Adobe PDF

Checksum

(MD5):f74768d016c8730e5b6a29f5dea9219f

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