Universität zu Köln

Marchegiano, Marta, Francke, Alexander ORCID: 0000-0002-0370-5802, Gliozzi, Elsa ORCID: 0000-0001-5608-1995 and Ariztegui, Daniel (2018). Arid and humid phases in central Italy during the Late Pleistocene revealed by the Lake Trasimeno ostracod record. Paleogeogr. Paleoclimatol. Paleoecol., 490. S. 55 - 70. AMSTERDAM: ELSEVIER. ISSN 1872-616X

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Abstract

A multiproxy approach in a sediment core from Lake Trasimeno has been used to reconstruct the climate history of central Italy during the Late Pleistocene to Early Holocene period (ca. 47,000-9,000 cal yr B.P.). Ostracod assemblages and sedimentological data (lithology and carbonate content) have been used to infer past hydrological changes in the area. Ostracods were analyzed throughout the core using diversity indexes and multi-variate statistic analyses (Cluster and PCA). Three main associations linked to lake level and salinity variations were recognized: 1) the C. torosa association, indicating permanent lacustrine conditions with high lake levels and low salinities; 2) the S. aculeata association, linked to very shallow/temporary waters with higher salinity conditions; and 3) the S. aculeata-E. mareotica association pointing to temporary water conditions and the highest salinities. Furthermore, the presence of C. fuscata and L. blankenbergensis during wide parts of the Late Pleistocene indicates temperatures lower than present days. Alternations of these three ostracod associations compares well with the oxygen isotope curve from Greenland (NGRIP) and are thus interpreted as climatically driven. At the Holocene transition (Termination 1), the ostracod associations indicate a delay in the increasing warming and humidity with respect to the NGRIP temperature record.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Marchegiano, Marta UNSPECIFIED UNSPECIFIED UNSPECIFIED Francke, Alexander UNSPECIFIED orcid.org/0000-0002-0370-5802 UNSPECIFIED Gliozzi, Elsa UNSPECIFIED orcid.org/0000-0001-5608-1995 UNSPECIFIED Ariztegui, Daniel UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-198816
DOI:	10.1016/j.palaeo.2017.09.033
Journal or Publication Title:	Paleogeogr. Paleoclimatol. Paleoecol.
Volume:	490
Page Range:	S. 55 - 70
Date:	2018
Publisher:	ELSEVIER
Place of Publication:	AMSTERDAM
ISSN:	1872-616X
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language GLACIAL-HOLOCENE TRANSITION; ENVIRONMENTAL-CHANGES; LAST; VARIABILITY; CLIMATE; EVOLUTION; OSCILLATIONS; SEDIMENTS; HISTORY; MARINE Multiple languages Geography, Physical; Geosciences, Multidisciplinary; Paleontology Multiple languages
Refereed:	Yes
URI:	http://kups.ub.uni-koeln.de/id/eprint/19881