Mid-holocene climate change in Lake Bosumtwi, Ghana
Bibliographic Data
| ID | 24086799 |
|---|---|
| Authors | James Russell (0000-0003-0827-1801), James M Russell (0000-0002-4835-7696, University of Minnesota, corresponding author), Michael R Talbot (University of Bergen), Brian J Haskell (University of Minnesota) |
| Year | 2003 |
| Volume | 60 |
| Issue | 2 |
| Pages | 133-141 |
| Publication date | 2003-09-01 |
| Peer Reviewed | Yes |
| Open Access | Yes |
| Type | ARTICLE |
| Venue | Quaternary Research (JOURNAL) |
| Journal identifiers | ISSN: 0033-5894 • E-ISSN: 1096-0287 |
| Publisher | Cambridge University Press (CUP) (PUBLISHER) |
| DOI | 10.1016/s0033-5894(03)00065-6 |
| OpenAlex | W1990795837 |
| Language | EN |
| Citations received | 17 |
| References cited | 26 |
Lake Bosumtwi is one of the most widely studied palaeoclimate archives in West Africa. Results from numerous AMS 14 C dates of samples from four piston cores from Lake Bosumtwi show that an abrupt sedimentary transition from a mid-Holocene sapropel to calcareous laminated muds occurred at about 3200 cal yr B.P. High-resolution analyses of the nitrogen isotopic composition of organic matter across this transition confirm its abrupt nature, and suggest that the change may signal a step toward increased aridity and intensified surface winds that affected western equatorial Africa from Ghana to the Congo basin. Northern and Eastern Africa experienced a similar abrupt shift toward aridity during the late Holocene, but at about 5000 cal yr B.P., a difference in timing that illustrates the regional nature of climate changes during the Holocene and the importance of feedback mechanisms in regulating Holocene climate variability. Furthermore, an abrupt change at about 3000 cal yr B.P. occurs at several sites adjacent to the tropical and subtropical Atlantic, which may hint at major changes in the surface temperatures of the tropical Atlantic and/or Pacific at this time.
Archaeology · Arid · Climate change · Climatology · Geography · Holocene · Holocene climatic optimum · Mediterranean climate · Physical geography · Sapropel · Sedimentary rock · Subtropics · Ecology · Geological formations and processes · Geology · Geology and Paleoclimatology Research · Oceanography · Paleontology · Pleistocene-Era Hominins and Archaeology
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| Unique citing works | 17 |
|---|---|
| Citations per year | 0,81 |
| Citation span | 2005 - 2018 (14) |
| Citation velocity | historical |
| Highly cited | No |
| Citation types | Neutral: 15 |