Claus U Hammer

• The Eem Stable Isotope Record along the GRIP Ice Core and Its Interpretation

  Open Access•Sigfús J Johnsen, Henrik B Clausen et al.•ARTICLE•Quaternary Research•1995

  Añadir item

  A 3029-m-long deep ice core extending nearly to bedrock has been drilled at the very top of the Greenland ice sheet (Summit) by the Greenland Ice-core Project (GRIP), an international European joint effort organized by the European Science Foundation. The ice core reaches back to 250,000 yr B.P. according to dating based partly on stratigraphic methods and partly on ice-flow modeling. A continuous and detailed stable isotope (δ 18 O) profile alon…

• Ash layers from Iceland in the Greenland GRIP ice core correlated with oceanic and land sediments

  Open Access•Karl Grönvold, Níels Óskarsson et al.•ARTICLE•Earth and Planetary Science Letters•1995

  Añadir item

  Four previously known ash layers (Ash Zones I and II, Saksunarvatn and the Settlement layer) all originating in Iceland, have been identified in the Central Greenland ice core GRIP. This correlation of the ash between the different environments is achieved by comparison of the chemical composition of glass shards from the ash. This establishes and confirms detailed correlations between the different types of depositional records and the absolute …

• Ice-Core Dating of the Pleistocene/Holocene Boundary Applied to a Calibration of the 14 C Time Scale

  Open Access•Claus U Hammer, Henrik B Clausen et al.•ARTICLE•Radiocarbon•1986•Citada por: 5•Referencias: 10

  Añadir item

  Seasonal variations in 18 O content, in acidity, and in dust content have been used to count annual layers in the Dye 3 deep ice core back to the Late Glacial. In this way the Pleistocene/Holocene boundary has been absolutely dated to 8770 BC with an estimated error limit of ± 150 years. If compared to the conventional 14 C age of the same boundary a value of Δ 14 C = 53 ± 13‰ is obtained. This Δ 14 C value suggests that 14 C levels during the La…

• Ice-Core Dating of the Pleistocene/Holocene Boundary Applied to a Calibration of the 14 C Time Scale

  Open Access•Claus U Hammer, Henrik B Clausen et al.•ARTICLE•Radiocarbon•1986•Citada por: 5•Referencias: 10

  Añadir item

  Seasonal variations in 18 O content, in acidity, and in dust content have been used to count annual layers in the Dye 3 deep ice core back to the Late Glacial. In this way the Pleistocene/Holocene boundary has been absolutely dated to 8770 BC with an estimated error limit of ± 150 years. If compared to the conventional 14 C age of the same boundary a value of Δ 14 C = 53 ± 13‰ is obtained. This Δ 14 C value suggests that 14 C levels during the La…

• Ice-Core Dating of the Pleistocene/Holocene Boundary Applied to a Calibration of the 14 C Time Scale

  Open Access•Claus U Hammer, Henrik B Clausen et al.•ARTICLE•Radiocarbon•1986•Citada por: 5•Referencias: 10

  Añadir item

  Seasonal variations in 18 O content, in acidity, and in dust content have been used to count annual layers in the Dye 3 deep ice core back to the Late Glacial. In this way the Pleistocene/Holocene boundary has been absolutely dated to 8770 BC with an estimated error limit of ± 150 years. If compared to the conventional 14 C age of the same boundary a value of Δ 14 C = 53 ± 13‰ is obtained. This Δ 14 C value suggests that 14 C levels during the La…

• The Eem Stable Isotope Record along the GRIP Ice Core and Its Interpretation

  Open Access•Sigfús J Johnsen, Henrik B Clausen et al.•ARTICLE•Quaternary Research•1995

  Añadir item

  A 3029-m-long deep ice core extending nearly to bedrock has been drilled at the very top of the Greenland ice sheet (Summit) by the Greenland Ice-core Project (GRIP), an international European joint effort organized by the European Science Foundation. The ice core reaches back to 250,000 yr B.P. according to dating based partly on stratigraphic methods and partly on ice-flow modeling. A continuous and detailed stable isotope (δ 18 O) profile alon…

• Ash layers from Iceland in the Greenland GRIP ice core correlated with oceanic and land sediments

  Open Access•Karl Grönvold, Níels Óskarsson et al.•ARTICLE•Earth and Planetary Science Letters•1995

  Añadir item

  Four previously known ash layers (Ash Zones I and II, Saksunarvatn and the Settlement layer) all originating in Iceland, have been identified in the Central Greenland ice core GRIP. This correlation of the ash between the different environments is achieved by comparison of the chemical composition of glass shards from the ash. This establishes and confirms detailed correlations between the different types of depositional records and the absolute …

Geology and Paleoclimatology Research (3 obras) · Ice core (3 obras) · Physical geography (3 obras) · Geology (2 obras) · Glacial period (2 obras) · Methane Hydrates and Related Phenomena (2 obras) · Oceanography (2 obras) · Paleontology (2 obras) · Arctic (1 obras) · Climatology (1 obras)