Late Holocene Climatic Changes in Western Equatorial Africa Inferred from Pollen from Lake Sinnda, Southern Congo
| Autor: | Dominique Schwartz, Christian de Namur, Annie Vincens, Jacques Bertaux, H. Elenga |
|---|---|
| Rok vydání: | 1998 |
| Předmět: |
010506 paleontology
PALEOENVIRONNEMENT medicine.disease_cause 01 natural sciences PALYNOLOGIE Grassland Arts and Humanities (miscellaneous) Pollen HOLOCENE Palm oil medicine 0601 history and archaeology ARIDITE Holocene 0105 earth and related environmental sciences Earth-Surface Processes QUATERNAIRE geography geography.geographical_feature_category 060102 archaeology Ecology business.industry DATATION ABSOLUE 06 humanities and the arts Vegetation Arid PALEOCLIMAT Agriculture General Earth and Planetary Sciences business Geology |
| Zdroj: | Quaternary Research. 50:34-45 |
| ISSN: | 1096-0287 0033-5894 |
| Popis: | Pollen analysis of two cores from the Lake Sinnda, located in one of the driest areas of the southern Congo, reveals a history of vegetation and climate in this region during the past 5000 yr. A major change centered around 3000-2500 yr B.P. is indicated by an abrupt decrease in forest pollen and by a corresponding increase in grassland pollen. Concurrent drying up of the lake shows that climate, in particular aridity, was the major cause of this change. This paleoclimatic reconstruction conforms with evidence for drier conditions in other parts of western equatorial Africa, such as the development of isolated enclosed savannas and of heliophilous forested formations. The aridity is recorded more fully at Lake Sinnda than at the previous studied ones. It probably lasted longer, from 4200 to 1300 yr B.P., and was more progressive than previously inferred. The aridity predates agriculture marked by pollen of the oil palm at Lake Sinnda. (Résumé d'auteur) |
| Databáze: | OpenAIRE |
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