Radiocarbon dates, grain size measurements and selected foraminifera analysis from sediment cores AvH248260-2 and AvH248260-1, Ameralik Fjord, SW Greenland
Cobertura |
LATITUDE: 64.090500 * LONGITUDE: -51.258800 |
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Data(s) |
04/07/2006
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Resumo |
Sedimentological and geochemical (XRF) data together with information from diatom and benthic foraminiferal records of a 3.5 m long gravity core from Ameralik Fjord, southern West Greenland, is used for reconstructing late-Holocene environmental changes in this area. The changes are linked to large-scale North Atlantic ocean and climate variability. AMS 14C-dating of benthic foraminifera indicates that the sediment core records the last 4400 years and covers the termination of the Holocene Thermal Maximum (HTM). The late HTM (4.4 3.2 ka BP) is characterized by high accumulation rates of fine (silty) sediments related to strong meltwater discharge from the Inland Ice. The HTM benthic foraminiferal fauna demonstrates the presence of well-ventilated, saline bottom water originating from inflow of subsurface West Greenland Current water of Atlantic (Irminger Sea) origin. The hydrographic conditions were further characterized by limited sea ice probably related to a mild and relatively windy winter climate. After 3.2 ka BP lower fine-grained sedimentation rates, but a larger input from sea-ice rafted or aeolian coarse material prevailed. This can be related to colder atmospheric conditions with a decreased meltwater discharge and more widespread sea-ice cover in the fjord. |
Formato |
application/zip, 4 datasets |
Identificador |
https://doi.pangaea.de/10.1594/PANGAEA.785444 doi:10.1594/PANGAEA.785444 |
Idioma(s) |
en |
Publicador |
PANGAEA |
Direitos |
CC-BY: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted |
Fonte |
Supplement to: Møller, HS; Jensen, Sven; Kuijpers, Antoon; Aagaard-Sørensen, Steffen; Seidenkrantz, Marit-Solveig; Prins, Maarten A; Endler, Rudolf; Mikkelsen, Naja (2006): Late-Holocene environment and climatic changes in Ameralik Fjord, southwest Greenland: evidence from the sedimentary record. The Holocene, 16(5), 685-695, doi:10.1191/0959683606hl963rp |
Palavras-Chave | #(a) = Redistributed shell fragments presumably Yoldia Hyperborea, not used for the age model; <0.25 µm; 1-0.25 mm; 1 sigma; 250-63 µm; 2 sigma; Age, 14C AMS; Age, 14C calibrated; Age, 14C milieu/reservoir corrected; Age, dated; Age, dated material; Age, dated standard deviation; Age dated; Age model; Age std dev; Ameralik Fjord; AvH248260-2; Ca; Calcium; Corrected depth (after deletion of turbidite sediments from record); Dated material; Depth; Depth, bottom/max; DEPTH, sediment/rock; Depth, sediment revised; Depth, top/min; Depth bot; Depth revised; Depth top; Fe; GC; Gravity corer; Iron; Lab no; Mean; Mean, statistical; Median calibrated age (BP); Sample, optional label/labor no; Silt; Size fraction < 0.25 µm; Size fraction 0.250-0.063 mm; Size fraction 1.000-0.250 mm; Sort; Sorting; X-ray fluorescence (XRF) |
Tipo |
Dataset |