Palynology and sedimentology of core PG1214, supplement to: Wagner, Bernd; Melles, Martin (2001): A Holocene seabird record from Raffles Sø sediments, East Greenland, in response to climatic and oceanic changes. Boreas, 30(3), 228-239

A 3.5-m-long sediment sequence from a lake on Raffles Oslash, off Liverpool Land, East Greenland, was investigated for chronology, lithology, palynology and biogeochemistry. Radiocarbon-dating of plant remains and the lithology of the sediment succession indicate continuous sedimentation since degla...

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Bibliographic Details
Main Authors: Wagner, Bernd, Melles, Martin
Format: Article in Journal/Newspaper
Language:English
Published: PANGAEA - Data Publisher for Earth & Environmental Science 2001
Subjects:
Composite Core
Piston corer Potsdam
GL-Land_1994
AWI Arctic Land Expedition
Permafrost Research Periglacial Dynamics @ AWI AWI_PerDyn
Quaternary Environment of the Eurasian North QUEEN
Arctic
Boreas
Greenland
Liverpool Land
East Greenland
permafrost
Online Access:https://dx.doi.org/10.1594/pangaea.727660
https://doi.pangaea.de/10.1594/PANGAEA.727660
Description
Summary:A 3.5-m-long sediment sequence from a lake on Raffles Oslash, off Liverpool Land, East Greenland, was investigated for chronology, lithology, palynology and biogeochemistry. Radiocarbon-dating of plant remains and the lithology of the sediment succession indicate continuous sedimentation since deglaciation of the area prior to 10000 cal. yr BP. The postglacial palynological record shows little variation and evidence of a wind-transported pollen supply, both resulting from the geographical characteristics of Raffles Oslash. Significant variations in the biogeochemical data reflect changes in aquatic bioproduction. These changes depend to some extent on climatic changes; however, they are mainly due to variations in seabird breeding colonies in the catchment which influence nutrient and cadmium supply to the lake. Large seabird breeding colonies were present between 7500 and 1900, from 1000 to 500, and since c. 100 cal. yr BP. Their absence prior to 7500 cal. yr BP may be the result of unsuitable feeding conditions close to Raffles Oslash caused by a too dense or too open seaice cover. In contrast, between 1900 and 1000 and from 500 to 100 cal. yr BP, the seabird settlement was probably restricted by an insufficiently long breeding season due to cold climate conditions in East Greenland.

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