Die Klima- und Umweltgeschichte des Balkans während des letzten Glazials und des Holozäns, rekonstruiert anhand von Seesedimenten des Prespasees (Mazedonien/Albanien/Griechenland)
Supervisor: PD Dr. Bernd Wagner
Advisor: Prof. Dr. Frank Schäbitz
Lake Prespa is one of the three largest lakes on the Balkan Peninsula and is, with a supposed age of more than three million years, one of the oldest lakes in Europe. The sediments of Lake Prespa constitute an invaluable climate archive for the Balkan region, which was sparsely investigated. The focus of this study in the CRC 806 –Our way to Europe– is to reconstruct the climatic and environmental history of the Balkan region during the Late Glacial and Holocene on a high resolution.
For this purpose, a 1776 cm long sediment sequence from the northern central part of Lake Prespa (core Co1215) was recovered and investigated in this study using biogeochemical, physical, sedimentological and lithological methods. Based on changes in this proxies and by means of selected palynological and ostracod analyses, long- and short-term climate and environmental changes in the Prespa region were identified and their impact on productivity, ecology and hydrology of Lake Prespa as well as on the climate and environmental conditions in the catchment were clarified. The chronology of the Co1215 sediment sequence is based on radiocarbon dating, ESR dating, tephrochronology and wiggle-matching and has resulted in an age of 91.6 ka calBP. As there are no hints for a hiatus in the lithological sequence at all, a continuous sedimentation at the coring location can be assumed. The characteristic sediments of the lithofacies allow a obvious distinction between the last Glacial and the Holocene as well as between stadial and interstadial conditions in the region, fluctuations in water level and trophic state, different redox conditions in the lake, and stages of intensified or reduced soil erosion in the catchment. Changes in climatic and environmental conditions on a local scale were classified by comparison with results from other studies in the northeastern Mediterranean. Although short- and long-term cold/warm stages, and arid/humid periods occurred in the Mediterranean and the northern hemisphere during the MIS 5 and MIS 3 interstadials, Heinrich events, LGM, Bølling/Allerød, Younger Dryas and the „8.2 ka event“ are identified in the Lake Prespa sediments.
2009 – 2012: PhD student at the Institute for Geology and Mineralogy, University of Cologne.
1/2009: Diploma in Geology, University of Bonn.
Thesis title: “Die messinisch-pliozäne Zorreras Einheit des Sorbas Beckens (SE Spanien) im Kontext der Messinian Salinity Crisis”.
2002 – 2009: Studies in Geology and Palaeontology, University of Bonn.
6/2011: Drilling campaign at Doirani Lake.
10/2009 – 11/2009: Drilling Project at Prespa Lake .
- Boehm, A. (2012): Die Klima– und Umweltgeschichte des Balkans während des letzten Glazials und des Holozäns, rekonstruiert anhand von Seesedimenten des Prespasees (Mazedonien/Albanien/Griechenland). University of Cologne, University of Cologne