Loess in Eurasia: Spatial and Temporal Paleoenvironmental Reconstruction

A special issue of Geosciences (ISSN 2076-3263).

Deadline for manuscript submissions: closed (31 October 2019) | Viewed by 5370

Special Issue Editors


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Guest Editor
Organic Geochemistry Group, MARUM – Center for Marine Environmental Sciences and Department of Geosciences, University of Bremen, Bremen, Germany
Interests: paleoclimate; geochemistry; sedimentology; loess; biomarkers; eolian dust

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Co-Guest Editor
Institute of Geography, University of Bern, Hallerstrasse 12, 3012 Bern, Switzerland
Interests: paleoclimate; loess; aolian dust; paleosol sequence

Special Issue Information

Dear Colleagues,

The goal of this Special Issue of Geosciences is to gather high-quality original and review articles on loess research with a focus on Eurasian climate evolution.
Loess covers vast areas of Eurasia, where it presents one of the key archives for understanding relations between climate change, dust dynamics, and environment of the past. This Special Issue aims to improve our understanding of climatic and environmental conditions inferred from loess in all regions of Eurasia during Quaternary, with a particular focus on the establishment of a coherent understanding of the Eurasian paleoclimate. With this Special Issue, we want to present the diversity within the field of loess research, including state-of-the-art research, the application of new techniques, studies bridging regional frontiers, as well as providing guidelines for future research. We welcome articles dealing with the paleoclimate, paleoenvironmental reconstruction, stratigraphy, paleopedology, paleoecology, geomorphology, geoarcheology, climate modeling and related topics. Contributions providing new methods in geochemistry and dating techniques are especially encouraged.

Dr. Igor Obreht
Dr. Tobias Sprafke
Guest Editors

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Keywords

  • paleoclimate
  • loess
  • dust
  • paleosols
  • Eurasia
  • multiproxy analyses

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Published Papers (1 paper)

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Research

18 pages, 2852 KiB  
Article
First Calibration and Application of Leaf Wax n-Alkane Biomarkers in Loess-Paleosol Sequences and Modern Plants and Soils in Armenia
by Yesmine Trigui, Daniel Wolf, Lilit Sahakyan, Hayk Hovakimyan, Kristina Sahakyan, Roland Zech, Markus Fuchs, Tilmann Wolpert, Michael Zech and Dominik Faust
Geosciences 2019, 9(6), 263; https://doi.org/10.3390/geosciences9060263 - 17 Jun 2019
Cited by 22 | Viewed by 4884
Abstract
Interpreting paleoenvironmental conditions by means of n-alkane biomarker analyses is challenging because results depend on different influencing factors. Thus, regional calibration of n-alkane patterns is needed because of different plant chemo-taxonomic behavior. We investigated for the first-time leaf wax-derived n-alkane [...] Read more.
Interpreting paleoenvironmental conditions by means of n-alkane biomarker analyses is challenging because results depend on different influencing factors. Thus, regional calibration of n-alkane patterns is needed because of different plant chemo-taxonomic behavior. We investigated for the first-time leaf wax-derived n-alkane biomarkers from modern plants, litter, top soils, and two recently discovered loess-paleosol sequences (LPSs) in Armenia (Lesser Caucasus). Our results on modern samples show a promising discrimination power based on n-alkane chain length nC33 (probably nC31)) for grasses and herbs versus nC29 for deciduous trees, despite the large interplant variability within vegetation groups. In contrast with other Loess records in Europe, where Late Pleistocene environments are ranging from tundra-like (glacial) to deciduous forest habitats (interglacial), our results from two Armenian LPSs suggest a transition from humid-steppe biome or forest-steppe vegetation dominating during interglacial periods, to semi-desert shrubs species more adapted to the enhanced aridity during glacial periods. Full article
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