 |
| Titel |
Tracking atmospheric and riverine terrigenous supplies variability during the last glacial and the Holocene in central Mediterranean |
| VerfasserIn |
V. Bout-Roumazeilles, N. Combourieu-Nebout, S. Desprat, G. Siani, J.-L. Turon, L. Essallami |
| Medientyp |
Artikel
|
| Sprache |
Englisch
|
| ISSN |
1814-9324
|
| Digitales Dokument |
URL |
| Erschienen |
In: Climate of the Past ; 9, no. 3 ; Nr. 9, no. 3 (2013-05-15), S.1065-1087 |
| Datensatznummer |
250018054
|
| Publikation (Nr.) |
 copernicus.org/cp-9-1065-2013.pdf |
|
|
|
|
|
| Zusammenfassung |
| A multiproxy study – coupling mineralogical, grain size and geochemical
approaches – was used to tentatively retrace eolian and fluvial
contributions to sedimentation in the Sicilian–Tunisian Strait since the
last glacial. The eolian supply is dominant over the whole interval,
excepted during the sapropel S1 when riverine contribution apparently became
significant. Saharan contribution increased during the
Bølling–Allerød, evidencing the persistence of aridity over North
Africa although the northern Mediterranean already experienced moister and
warmer conditions. The Younger Dryas is marked by proximal dust inputs,
highlighting intense regional eolian activity. A southward migration of dust
provenance toward Sahel occurred at the onset of the Holocene, likely
resulting from a southward position of the Inter Tropical Convergence Zone
that was
probably associated with a large-scale atmospheric reorganization. Finally,
a peculiar high terrigenous flux associated with drastic modifications of
the mineralogical and geochemical sediment signature occurred during the
sapropel S1, suggesting the propagation of fine particles derived from major
floodings of the Nile River – resulting from enhanced rainfall on
northeastern Africa – and their transportation across the Sicilian–Tunisian
Strait by intermediate water masses. |
| |
|
| Teil von |
|
|
|
|
|
|
|
|