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Wagner, Bernd; Melles, Martin; Hahne, Jürgen; Niessen, Frank; Hubberten, Hans-Wolfgang (2000): Chronology, lithology, palynology and biogeochemistry of sediment cores from East Greenland lakes. PANGAEA,, Supplement to: Wagner, B et al. (2000): Holocene deglaciation and climate history of Geographical Society Island, East Greenland - evidence from lake sediments. Palaeogeography, Palaeoclimatology, Palaeoecology, 160(1-2), 45-68,

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Sediment cores from two lakes in the outer coastal region of East Greenland were investigated for chronology, lithology, palynology, and biogeochemistry. A 10 m long sequence recovered in Basaltsø comprises the entire lake history following the last glaciation of the area, probably during the Preboreal oscillation. This is indicated by a succession from glacial via glaciolimnic to limnic sediments. Deglaciation of the area was associated with a high sedimentation rate, mirrored also in the basal part of a 2.6 m long core from a smaller lake (B1) about 1 km south of Basaltsø. Limnic sedimentation without glacial influence commenced about 10 000 cal. yr BP according to radiocarbon-dated terrestrial plant remains. Biogeochemical and palynological data indicate an early Holocene climatic optimum from 9000 to 6500 cal. yr BP A climatic deterioration began at 6500 cal. yr BP with an increase in snow accumulation, documented by a change in the pollen assemblage and a coinciding change in the grain-size distribution. At least since 5000 cal. yr BP, a decrease in the biogeochemical parameters in both lake sediment successions indicates a temperature decline. This deterioration culminated at about 3000-1000 cal. yr BP, when the climate was cold and dry. A slight warming is indicated in the pollen assemblage between ca. 1000 and 800 cal. yr BP. Following a subsequent rise in precipitation, cooling during the Little Ice Age is mirrored in lowest dwarf shrub pollen percentages and in low contents of organic components.
Related to:
Wagner, Bernd (2000): Holocene environmental history of East Greenland - evidence from lake sediments (Seesedimente als Archive der Holozänen Umweltgeschichte Ostgrönlands). Berichte zur Polarforschung = Reports on Polar Research, 358, 93 pp,
Median Latitude: 72.719330 * Median Longitude: -22.477000 * South-bound Latitude: 72.713330 * West-bound Longitude: -22.495000 * North-bound Latitude: 72.723330 * East-bound Longitude: -22.465000
Date/Time Start: 1994-09-13T00:00:00 * Date/Time End: 1994-09-15T00:00:00
PG1205 * Latitude: 72.723330 * Longitude: -22.465000 * Date/Time: 1994-09-13T00:00:00 * Lake water depth: 21 m * Recovery: 9.93 m * Location: Basalt Sø * Campaign: GL-Land_1994 (Greenland94) * Basis: AWI Arctic Land Expedition * Method/Device: Composite Core (COMPCORE)
PG1212 * Latitude: 72.713330 * Longitude: -22.495000 * Date/Time: 1994-09-15T00:00:00 * Lake water depth: 9 m * Recovery: 2.7 m * Location: Lake S of Basalt Sø * Campaign: GL-Land_1994 (Greenland94) * Basis: AWI Arctic Land Expedition * Method/Device: Composite Core (COMPCORE)
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