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| Titel |
Glacial-interglacial vegetation dynamics in South Eastern Africa coupled to sea surface temperature variations in the Western Indian Ocean |
| VerfasserIn |
L. M. Dupont, T. Caley, J.-H. Kim, I. Castañeda, B. Malaizé, J. Giraudeau |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1814-9324
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| Digitales Dokument |
URL |
| Erschienen |
In: Climate of the Past ; 7, no. 4 ; Nr. 7, no. 4 (2011-11-09), S.1209-1224 |
| Datensatznummer |
250004683
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| Publikation (Nr.) |
 copernicus.org/cp-7-1209-2011.pdf |
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| Zusammenfassung |
| Glacial-interglacial fluctuations in the vegetation of South Africa might
elucidate the climate system at the edge of the tropics between the Indian and
Atlantic Oceans. However, vegetation records covering a full glacial cycle
have only been published from the eastern South Atlantic. We present a
pollen record of the marine core MD96-2048 retrieved by the Marion Dufresne
from the Indian Ocean ∼120 km south of the Limpopo River mouth. The
sedimentation at the site is slow and continuous. The upper 6 m
(spanning the past 342 Ka) have been analysed for pollen and spores at
millennial resolution. The terrestrial pollen assemblages indicate that
during interglacials, the vegetation of eastern South Africa and southern
Mozambique largely consisted of evergreen and deciduous forests. During
glacials open mountainous scrubland dominated. Montane forest with
Podocarpus extended during humid periods was favoured by strong local insolation.
Correlation with the sea surface temperature record of the same core
indicates that the extension of mountainous scrubland primarily depends on
sea surface temperatures of the Agulhas Current. Our record corroborates
terrestrial evidence of the extension of open mountainous scrubland
(including fynbos-like species of the high-altitude Grassland biome) for the
last glacial as well as for other glacial periods of the past 300 Ka. |
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