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| Titel |
Environmental changes of Northern Anatolia/Black Sea region during the Eemian and the Holocene: pollen and dinocyst records from sediment cores 22-GC3/8 |
| VerfasserIn |
Lyudmila Shumilovskikh, Helge Arz, Dominik Fleitmann, Hermann Behling |
| Konferenz |
EGU General Assembly 2013
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 15 (2013) |
| Datensatznummer |
250078312
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| Zusammenfassung |
| In order to improve the knowledge about regional climate development in the Eastern
Mediterranean, the DFG-Project “Dynamics of Mid-latitude / Mediterranean climate during
the last 150 ka: Black Sea / Northern Anatolian Paleoenvironmental Reconstructions”
(DynNAP) was established. For this goal, marine cores 22-GC3 and 22-GC8 from SE Black
Sea cover the last 140 kyr BP and were studied by high resolution analysis of pollen and
dinoflagellate cysts. These records were used to reconstruct vegetation of Northern Anatolia
and hydrological changes of the SE Black Sea during the Holocene and the last interglacial.
Age-control of the time series is based on shell oxygen isotopes (ostracods, bivalve)
correlated to the isotope records of Uranium series dated stalagmites from Solufar Cave, NW
Anatolia. The results show a dominance of steppe vegetation during glacial periods and the
spreading of oak steppe forest during the deglaciation periods. The interglacial periods are
characterized by the development of more humid forest vegetation (Fagus, Carpinus,
Corylus, Ulmus/Zelkova, Ostrya). During both interglacial periods, the Holocene and the
Eemian, a Mediterranean – Black Sea reconnection took place, inducing transition from
freshwater/brackish to more marine conditions. Patterns of vegetation and hydrological
changes during interglacials were not identical during both interglacials. During the
Eemian, the submediterranean Ostrya-type dominated during the first half of the
interglacial, indicating warm summers, whereas more humid Fagus-Carpinus forests
dominated in the second half. During the Holocene, the dominance of Pinus in pollen
record indicates generally cooler conditions than in the Eemian. An increase of
anthropogenic indicators such as Plantago lanceolata-type, Rumex, Juglans in the late
Holocene suggests elevated human activities in Northern Anatolia. Sea-surface
temperature and salinity of the Black Sea achieved significant higher values in the Eemian
compared to the Holocene, suggesting a higher Mediterranean inflow into the basin. |
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