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Stratigraphic interpretations of loess-paleosol sequences and their relevance for land-sea correlations

Abstract

Loess-paleosol sequences represent the spatially most widespread geoarchives across Eurasia. Hence, the assessment of chrono- and lithostratigraphic patterns and differences of these terrestrial paleoclimatic records represents a key to unravel the climate evolution of Eurasia. Yet, the reconstruction of its climatic history is still challenging, i.e. due to time scale uncertainties and interpretation of paleoenvironmental proxy data. This represents a major limitation for understanding the interaction and evolution of Northern Hemisphere climate systems over the continental areas, and also their relation to marine proxy records. Inconsistencies and crucial issues concerning timing, correlation and interpretation of these loess-paleosol records are outlined.Topic 8: Climate change, climate dynamics and paleoclimate – 8c) Loess systems and the reconstruction of Pleistocene climate dynamics
168In this study, we aim to investigate the effect of time scale (in)consistency for paleoclimatic interpretations of several loess-paleosol sequences from Eurasia. Firstly, we test the effect of different stratigraphical relationships/correlations by using original time scales, and correlations to different reference datasets. Secondly, we utilize linear mathematical models of reference datasets (including orbital parameters and a deep marine oxygen isotope record)- Then we compare the observed relationships to explain the patterns observed in loess paleoclimate data. This way the effect of alignment and different stratigraphic (age model) interpretations onto inferred origins of paleosol formation in loess records are compared. Finally, we draw conclusions on how important time scale alignment is for the interpretation of forcing mechanisms driving loess-paleosol sequence formation. The outlined approach represents a crucial contribution to achieve a common stratigraphic interpretation, and represents a step forward in overcoming current timing/age differences between different records

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Bibliography

Zeeden, C., Hambach, U., Obreht, I., Hao, Q., Kaboth, S., Veres, D., Lehmkuhl, F., Gavrilov, M., Markovic, S. (2018): Stratigraphic interpretations of loess-paleosol sequences and their relevance for land-sea correlations. Geobonn 2018, Living Earth, 2-6 September 2018, Bonn, Germany

Authors Zeeden, C. and Hambach, U. and Obreht, I. and Hao, Q. and Kaboth, S. and Veres, D. and Lehmkuhl, F. and Gavrilov, M. and Markovic, S.
Type presentation
Title Stratigraphic interpretations of loess-paleosol sequences and their relevance for land-sea correlations
Year 2018
Organization Geobonn 2018, Living Earth, 2-6 September 2018, Bonn, Germany
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