http://www.cnr.it/ontology/cnr/individuo/prodotto/ID29833

Late Quaternary palaeoenvironmental reconstruction from Lakes Ohrid and Prespa (Macedonia/Albania border) using stable isotopes. (Articolo in rivista)

Type

Prodotto della ricerca (Classe)
Articolo in rivista (Classe)

Label

Late Quaternary palaeoenvironmental reconstruction from Lakes Ohrid and Prespa (Macedonia/Albania border) using stable isotopes. (Articolo in rivista) (literal)

Anno

2010-01-01T00:00:00+01:00 (literal)

Alternative label

Leng M.; Baneschi I.; Zanchetta G.; Jex C.; Wagner B.; Vogel H. (2010)
Late Quaternary palaeoenvironmental reconstruction from Lakes Ohrid and Prespa (Macedonia/Albania border) using stable isotopes.
in Biogeosciences (Print)
(literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori

Leng M.; Baneschi I.; Zanchetta G.; Jex C.; Wagner B.; Vogel H. (literal)

Pagina inizio

3109 (literal)

Pagina fine

3122 (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume

7 (literal)

Rivista

Biogeosciences (Rivista)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#note

In: Biogeosciences, vol. 7 (10) pp. 3109 - 3122. European Geosciences Union, 2010. (literal)

Note

ISI Web of Science (WOS) (literal)

Titolo

Late Quaternary palaeoenvironmental reconstruction from Lakes Ohrid and Prespa (Macedonia/Albania border) using stable isotopes. (literal)

Abstract

Here we present stable isotope data from three sediment records from lakes that lie along the Macedonian-Albanian border (Lake Prespa: 1 core, and Lake Ohrid: 2 cores). The records only overlap for the last 40 kyr, although the longest record contains the MIS 5/6 transition (Lake Ohrid). The sedimentary characteristics of both lakes differ significantly between the glacial and interglacial phases. At the end of MIS 6 Lake Ohrid's water level was low (high δ18Ocalcite) and, although productivity was increasing (high calcite content), the carbon supply was mainly from inorganic catchment rock sources (high δ13Ccarb). During the last interglacial, calcite and TOC production and preservation increased, progressively lower δ18Ocalcite suggest increase in humidity and lake levels until around 115 ka. During ca. 80 ka to 11 ka the lake records suggest cold conditions as indicated by negligible calcite precipitation and low organic matter content. In Lake Ohrid, δ13Corg are complacent; in contrast, Lake Prespa shows consistently higher δ13Corg suggesting a low oxidation of 13C-depleted organic matter in agreement with a general deterioration of climate conditions during the glacial. From 15 ka to the onset of the Holocene, calcite and TOC begin to increase, suggesting lake levels were probably low (high δ18Ocalcite). In the Holocene (11 ka to present) enhanced productivity is manifested by high calcite and organic matter content. All three cores show an early Holocene characterised by low δ18Ocalcite, apart from the very early Holocene phase in Prespa where the lowest δ18Ocalcite occurs at ca. 7.5 ka, suggesting a phase of higher lake level only in (the more sensitive) Lake Prespa. From 6 ka, δ18Ocalcite suggest progressive aridification, in agreement with many other records in the Mediterranean, although the uppermost sediments in one core records low δ18Ocalcite which we interpret as a result of human activity. Overall, th (literal)

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