Palaeoclimatic record from a loess–soil profile in northeastern Bulgaria—II. Correlation with global climatic events during the Pleistocene |
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Authors: | Diana Jordanova & Nikolai Petersen |
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Institution: | ;1 Geophysical Institute, Bulgarian Academy of Sciences, Acad. G. Bonchev Str., block 3, 1113 Sofia, Bulgaria. E-mail: , Institute fur Allgemeine und Angewandte Geophysik, Ludwig-Maximilians–Universitat, Theresienstrasse 41, 80333 Munchen, Germany |
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Abstract: | Magnetic susceptibility ( χ ) variations and the behaviour of the ratio of susceptibility to saturation magnetization ( χ/J s ) along the loess/palaeosol section at Koriten (NE Bulgaria) are used to deduce climatic changes during the Pleistocene in southeastern Europe. A good correlation of susceptibility variations with the astronomically tuned oxygen isotope record from ODP site 677 enables us to propose a more precise dating of the upper part of the Bulgarian loess complex. Close correspondence between susceptibility and δ 1 8 O records demonstrates the global significance of the palaeoclimatic signal recorded, although differences in relative amplitudes of χ and χ/J s and δ 1 8 O create difficulties in making quantitative estimates of the climatic humidity in the past. The role of local factors affecting the palaeoclimatic mineral magnetic record deduced from the profile studied in Bulgaria is discussed. |
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Keywords: | loess/palaeosol sediments palaeoclimate rock magnetism |
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