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Title: River inflow and salinity changes in the Caspian Sea during the last 5500 years
Authors: Leroy, SAG
Marret, F
Gibert, E
Chalié, F
Reyss, JL
Arpe, K
Keywords: Caspian sea;Pollen;Holocene;Salinity;Dinocysts;River flow
Issue Date: 2007
Publisher: Elsevier
Citation: Quaternary Science Reviews. 26(25-28)
Abstract: Pollen, spores and dinoflagellate cysts have been analysed on three sediment cores (1.8–1.4 m-long) taken from the south and middle basins of the Caspian Sea. A chronology available for one of the cores is based on calibrated radiocarbon dates (ca 5.5–0.8 cal. ka BP). The pollen and spores assemblages indicate fluctuations between steppe and desert. In addition there are some outstanding zones with a bias introduced by strong river inflow. The dinocyst assemblages change between slightly brackish (abundance of Pyxidinopsis psilata and Spiniferites cruciformis) and more brackish (dominance of Impagidinium caspienense) conditions. During the second part of the Holocene, important flow modifications of the Uzboy River and the Volga River as well as salinity changes of the Caspian Sea, causing sea-level fluctuations, have been reconstructed. A major change is suggested at ca 4 cal. ka BP with the end of a high level phase in the south basin. Amongst other hypotheses, this could be caused by the end of a late and abundant flow of the Uzboy River (now defunct), carrying to the Caspian Sea either meltwater from higher latitudes or water from the Amu-Daria. A similar, later clear phase of water inflow has also been observed from 2.1 to 1.7 cal. ka BP in the south basin and probably also in the north of the middle basin.
ISSN: 0277-3791
Appears in Collections:Environment
Institute for the Environment
Dept of Life Sciences Research Papers

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LeroyetalHolocCSfinal.pdf275.75 kBAdobe PDFView/Open
fig1map.jpg533.37 kBJPEGThumbnail
fig 3 carbonates.pdf189.36 kBAdobe PDFView/Open
fig 2 CS cores.pdf177.21 kBAdobe PDFView/Open
fig 4 radionucleides.pdf220.27 kBAdobe PDFView/Open
fig 5 PonD.pdf249.55 kBAdobe PDFView/Open
fig_6_14po.pdf421.24 kBAdobe PDFView/Open
fig_7_18po.pdf569.27 kBAdobe PDFView/Open
fig_8_21po.pdf633.42 kBAdobe PDFView/Open
fig_9_14di.pdf267.64 kBAdobe PDFView/Open
fig_10_18di.pdf258.93 kBAdobe PDFView/Open
fig_11_21di.pdf300.47 kBAdobe PDFView/Open
fig.12.pdf213.27 kBAdobe PDFView/Open

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