Pollen record and dating of sediment core GIK16776-1 off Liberia
Fuente:
PANGAEA
Salvato in:
| Autori principali: | , , |
|---|---|
| Natura: | Dataset Open Access |
| Lingua: | en |
| Pubblicazione: |
PANGAEA
1998
|
| Soggetti: | |
| Accesso online: | |
| Tags: |
Aggiungi Tag
Nessun Tag, puoi essere il primo ad aggiungerne!!
|
| _version_ | 1867168554033348608 |
|---|---|
| author | Jahns, Susanne Hüls, Matthias Sarnthein, Michael |
| author_facet | Jahns, Susanne Hüls, Matthias Sarnthein, Michael |
| collection | Datos científicos de ciencias marinas y ambientales |
| contents | Based on pollen analysis of a sediment core from the Atlantic Ocean off Liberia the West African vegetation history for the last 400 ka is reconstructed. During the cold oxygen isotope stages 12, 10, 8, 6, 4, 3 and 2 an arid climate is indicated, resulting in a southward shifting of the southern border of the savanna. Late Pleistocene glacial stages were more arid than during the Middle Pleistocene. A persistence of the rain forest in the area, even during the glacial stages, is recorded. This suggests a glacial refuge of rain forest situated in the Guinean mountains. Afromontane forests with Podocarpus occurred in the Guinean mountains from the stages 12 to 2 and disappeared after. The tree expanded from higher to lower elevations twice in the warm oxygen isotope stage 11 (pollen subzones 11d, 11b) and at least twice during the warm stage 5 (pollen subzones 5d, 5a), indicating a relative cool but humid climate for these periods. |
| format | Dataset Open Access |
| id | pangaea_https___doi_org_10_1594_PANGAEA_728710 |
| institution | PANGAEA |
| language | en |
| publishDate | 1998 |
| publisher | PANGAEA |
| record_format | pangaea |
| spellingShingle | Pollen record and dating of sediment core GIK16776-1 off Liberia Jahns, Susanne Hüls, Matthias Sarnthein, Michael GIK/IfG; GIK16776-1; Institute for Geosciences, Christian Albrechts University, Kiel; KOL; M6/5; Meteor (1986); off Liberia; Piston corer (Kiel type) Based on pollen analysis of a sediment core from the Atlantic Ocean off Liberia the West African vegetation history for the last 400 ka is reconstructed. During the cold oxygen isotope stages 12, 10, 8, 6, 4, 3 and 2 an arid climate is indicated, resulting in a southward shifting of the southern border of the savanna. Late Pleistocene glacial stages were more arid than during the Middle Pleistocene. A persistence of the rain forest in the area, even during the glacial stages, is recorded. This suggests a glacial refuge of rain forest situated in the Guinean mountains. Afromontane forests with Podocarpus occurred in the Guinean mountains from the stages 12 to 2 and disappeared after. The tree expanded from higher to lower elevations twice in the warm oxygen isotope stage 11 (pollen subzones 11d, 11b) and at least twice during the warm stage 5 (pollen subzones 5d, 5a), indicating a relative cool but humid climate for these periods. |
| title | Pollen record and dating of sediment core GIK16776-1 off Liberia |
| topic | GIK/IfG; GIK16776-1; Institute for Geosciences, Christian Albrechts University, Kiel; KOL; M6/5; Meteor (1986); off Liberia; Piston corer (Kiel type) |
| url | https://doi.org/10.1594/PANGAEA.728710 |