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Paleoclimate and Weathering of the Tokaj (NE Hungary) Loess-paleosol Sequence: a Comparison of Geochemical Weathering Indices and Paleoclimate Parameters : Volume 10, Issue 1 (05/02/2014)

By Schatz, A.-k.

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Book Id: WPLBN0004006759
Format Type: PDF Article :
File Size: Pages 39
Reproduction Date: 2015

Title: Paleoclimate and Weathering of the Tokaj (NE Hungary) Loess-paleosol Sequence: a Comparison of Geochemical Weathering Indices and Paleoclimate Parameters : Volume 10, Issue 1 (05/02/2014)  
Author: Schatz, A.-k.
Volume: Vol. 10, Issue 1
Language: English
Subject: Science, Climate, Past
Collections: Periodicals: Journal and Magazine Collection, Copernicus GmbH
Historic
Publication Date:
2014
Publisher: Copernicus Gmbh, Göttingen, Germany
Member Page: Copernicus Publications

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Scholten, T., Schatz, A., & Kühn, P. (2014). Paleoclimate and Weathering of the Tokaj (NE Hungary) Loess-paleosol Sequence: a Comparison of Geochemical Weathering Indices and Paleoclimate Parameters : Volume 10, Issue 1 (05/02/2014). Retrieved from http://www.ebooklibrary.org/


Description
Description: Soil Science and Geomorphology Group, Department of Geosciences, Faculty of Science, University of Tübingen, Rümelinstrasse 19–23, 72072 Tübingen, Germany. The Tokaj loess-paleosol sequence in NE Hungary is one of the key sites for detailed paleoclimate reconstructions of the Quaternary in SE Europe. In this study, the geochemical composition of samples from the upper part of the sequence (45–21 ka) was analyzed and a variety of commonly used weathering indices and element ratios were applied to estimate weathering intensity. Further, similarities and differences between these weathering indices and their sensitivity to changes in paleoclimatic conditions were assessed. Results indicate that all of them accurately track changes in weathering intensity and are, with minor exceptions, very similar to each other.

Based on different transfer functions for major and trace element concentrations (XRF), magnetic susceptibility (MS) and δ13C data, we calculated mean annual paleotemperature and mean annual paleoprecipitation for the time intervals of paleosol formation (45–27 ka) and dust deposition (27–21 ka). Results differ depending on the respective transfer function and method but largely agree with previously published paleoclimate data of the region. XRF- and δ13C-based results converge to a MAT of 8–10°C (paleosol) and 8–9°C (loess) and show a~MAP range of 685–879 mm a-1 (paleosol) and 572–700 mm a-1 (loess). MS-based results are most reliable with MATs of 8.4°C (paleosol) and 6.7°C (loess) and MAPs of 325–441 mm a-1 (paleosol) and 224 mm a-1 (loess).


Summary
Paleoclimate and weathering of the Tokaj (NE Hungary) loess-paleosol sequence: a comparison of geochemical weathering indices and paleoclimate parameters

Excerpt
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