| Type |
Article |
| Date |
2014-03-17 |
| Language |
English |
| Author(s) |
Govin Aline1, Varma Vidya1, Prange Matthias1 |
| Affiliation(s) |
1 : Univ Bremen, MARUM Ctr Marine Environm Sci, D-28359 Bremen, Germany. |
| Source |
Geophysical Research Letters (0094-8276) (Amer Geophysical Union), 2014-03-17 , Vol. 41 , N. 6 , P. 2117-2125 |
| DOI |
10.1002/2013GL058999 |
| WOS© Times Cited |
20 |
| Keyword(s) |
Last Interglacial, Africa, precipitation, astronomical forcing, marine sediment cores, model simulations |
| Abstract |
This study documents the long-term evolution of western African precipitation during the Last Interglacial (LIG). We compare geochemical records obtained on nine sediment cores from the western African margin to a transient simulation (130–115 ka) performed with an ocean-atmosphere general circulation model and insolation as sole forcing. Good agreement between proxy records and model outputs indicates that long-term changes in western African precipitation largely responded to insolation variations during most of the LIG. After an early LIG dry phase (related to high-latitude iceberg melting or dating uncertainties), boreal summer insolation controlled the intensification of the North African monsoon between 127 and 122 ka, perhaps facilitating human migrations out of Africa. Equatorial African rainfall slightly increased throughout the LIG in response to increasing annual insolation. East-west contrasting rainfall evolutions at 10–20°S illustrate the complex southern African response, in contrast to more direct responses of North and equatorial western Africa, to insolation forcing. |
| Full Text |
| File |
Pages |
Size |
Access |
| Publisher's official version |
9 |
964 KB |
Open access |
| Suuport Info_Readme |
5 |
130 KB |
Open access |
| Suuport Info_Figure S1 |
1 |
760 KB |
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| Suuport Info_Figure S2 |
1 |
61 KB |
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| Suuport Info_Figure S3 |
1 |
200 KB |
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| Suuport Info_Figure S4 |
1 |
192 KB |
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| Suuport Info_Figure S5 |
1 |
112 KB |
Open access |
| Suuport Info_Table S1 |
1 |
48 KB |
Open access |
| Suuport Info_Table S2 |
2 |
79 KB |
Open access |
|
