Temporal patterns in lacustrine stable isotopes as evidence for climate change during the late glacial in the Southern European Alps

Finsinger, Walter; Belis, Claudio; Blockley, Simon P.E.; Eicher, Ueli; Leuenberger, Markus; Lotter, André F.; Ammann, Brigitta (2008). Temporal patterns in lacustrine stable isotopes as evidence for climate change during the late glacial in the Southern European Alps. Journal of Paleolimnology, 40(3), pp. 885-895. Dordrecht: Kluwer Academic 10.1007/s10933-008-9205-7

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We investigated oxygen and carbon isotopes of bulk carbonate and of benthic freshwater ostracods (Candona candida) in a sediment core of Lago Piccolo di Avigliana that was previously analyzed for pollen and loss-on-ignition, in order to reconstruct environmental changes during the late glacial and early Holocene. The depth-age relationship of the sediment core was established using 14 AMS C-14 dates and the Laacher See Tephra. While stable isotopes of bulk carbonates may have been affected by detrital input and, therefore, only indirectly reflect climatic changes, isotopes measured on ostracod shells provide unambiguous evidence for major environmental changes. Oxygen isotope ratios of ostracod shells (delta O-18(C)) increased by similar to 6 parts per thousand at the onset of the Bolling (similar to 14,650 cal BP) and were similar to 2 parts per thousand lower during the Younger Dryas (similar to 12,850 to 11,650 cal BP), indicating a temporal pattern of climate changes similar to the North Atlantic region. However, in contrast to records in that region, delta O-18(C) gradually decreased during the early Holocene, suggesting that compared to the Younger Dryas more humid conditions occurred and that the lake received gradually increasing input of O-18-depleted groundwater or river water.

Item Type:

Journal Article (Original Article)

Division/Institute:

08 Faculty of Science > Department of Biology > Institute of Plant Sciences (IPS)
08 Faculty of Science > Physics Institute > Climate and Environmental Physics
10 Strategic Research Centers > Oeschger Centre for Climate Change Research (OCCR)
08 Faculty of Science > Department of Biology > Institute of Plant Sciences (IPS) > Palaeoecology

UniBE Contributor:

Leuenberger, Markus Christian; Lotter, André F. and Ammann, Brigitta

Subjects:

500 Science > 580 Plants (Botany)

ISSN:

0921-2728

Publisher:

Kluwer Academic

Language:

English

Submitter:

Peter Alfred von Ballmoos-Haas

Date Deposited:

04 Oct 2013 15:09

Last Modified:

18 Nov 2015 09:30

Publisher DOI:

10.1007/s10933-008-9205-7

Web of Science ID:

000259081500010

URI:

https://boris.unibe.ch/id/eprint/30442 (FactScience: 194460)

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