Ice-rafted debris, geochemistry and stable oxygen isotope record of sediment core MD99-2277
Fuente:
PANGAEA
Gespeichert in:
| Hauptverfasser: | , , |
|---|---|
| Format: | Dataset Open Access |
| Sprache: | en |
| Veröffentlicht: |
PANGAEA
2003
|
| Schlagworte: | |
| Online-Zugang: | |
| Tags: |
Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
|
| _version_ | 1867171359282429952 |
|---|---|
| author | Helmke, Jan Peter Bauch, Henning A Mazaud, Alain |
| author_facet | Helmke, Jan Peter Bauch, Henning A Mazaud, Alain |
| collection | Datos científicos de ciencias marinas y ambientales |
| contents | Sediment proxy records from a continuous, 1.5 million year long deep-sea sediment core from a site in the western Norwegian Sea were used to obtain new insights into the nature of palaeoceanographic change in the northern North Atlantic (Nordic seas) during the climatic shift of the Mid-Pleistocene Revolution (MPR). Red-green sediment colour and magnetic susceptibility records both reveal significant differences in their mean values when comparing the intervals older than 700 000 yr (700 ka) with those from the past 500 kyr. The timing and duration of these changes indicates that the MPR in the Nordic seas is characterised by a gradual transition lasting about 200 kyr. Together with further sedimentological evidence this suggests that the mid-Pleistocene climate shift was accompanied by a general change in ice-drift pattern. It is further proposed that prior to the onset of the major late Pleistocene glaciations in the Northern Hemisphere a significant proportion of the ice in the eastern Nordic seas originated from a southern provenance, whereas later it dominantly came from the surrounding landmasses. |
| format | Dataset Open Access |
| id | pangaea_https___doi_org_10_1594_PANGAEA_736627 |
| institution | PANGAEA |
| language | en |
| publishDate | 2003 |
| publisher | PANGAEA |
| record_format | pangaea |
| spellingShingle | Ice-rafted debris, geochemistry and stable oxygen isotope record of sediment core MD99-2277 Helmke, Jan Peter Bauch, Henning A Mazaud, Alain 61F; CALYPSO; Calypso Corer; IMAGES; IMAGES V; International Marine Global Change Study; Jan Mayen Ridge; Marion Dufresne (1995); MD114; MD99-2277 Sediment proxy records from a continuous, 1.5 million year long deep-sea sediment core from a site in the western Norwegian Sea were used to obtain new insights into the nature of palaeoceanographic change in the northern North Atlantic (Nordic seas) during the climatic shift of the Mid-Pleistocene Revolution (MPR). Red-green sediment colour and magnetic susceptibility records both reveal significant differences in their mean values when comparing the intervals older than 700 000 yr (700 ka) with those from the past 500 kyr. The timing and duration of these changes indicates that the MPR in the Nordic seas is characterised by a gradual transition lasting about 200 kyr. Together with further sedimentological evidence this suggests that the mid-Pleistocene climate shift was accompanied by a general change in ice-drift pattern. It is further proposed that prior to the onset of the major late Pleistocene glaciations in the Northern Hemisphere a significant proportion of the ice in the eastern Nordic seas originated from a southern provenance, whereas later it dominantly came from the surrounding landmasses. |
| title | Ice-rafted debris, geochemistry and stable oxygen isotope record of sediment core MD99-2277 |
| topic | 61F; CALYPSO; Calypso Corer; IMAGES; IMAGES V; International Marine Global Change Study; Jan Mayen Ridge; Marion Dufresne (1995); MD114; MD99-2277 |
| url | https://doi.org/10.1594/PANGAEA.736627 |