A5051908326- Geology and Paleoclimatology Research
- Geological formations and processes
- Hydrocarbon exploration and reservoir analysis
- Geological and Geophysical Studies
- Geological Studies and Exploration
- Methane Hydrates and Related Phenomena
- Aeolian processes and effects
- Pleistocene-Era Hominins and Archaeology
- Geochemistry and Geologic Mapping
- Soil erosion and sediment transport
- earthquake and tectonic studies
- Cryospheric studies and observations
- Isotope Analysis in Ecology
- Coastal wetland ecosystem dynamics
- Environmental Changes in China
- Geochemistry and Elemental Analysis
- Seismic Imaging and Inversion Techniques
- Geological and Geochemical Analysis
- Archaeology and Rock Art Studies
- Hydrology and Watershed Management Studies
- African Botany and Ecology Studies
- Tree-ring climate responses
- Evolution and Paleontology Studies
- Geotechnical and Geomechanical Engineering
- Climate change and permafrost
Freie Universität Berlin
2014-2023
Abstract. Grain-size distributions offer powerful proxies of past environmental conditions that are related to sediment sorting processes. However, they often multimodal character because sediments can get mixed during deposition. To facilitate the use grain size as palaeoenvironmental proxy, this study aims distinguish main detrital processes contribute lacustrine sedimentation across Tibetan Plateau using grain-size end-member modelling analysis. Between three and five robust...
Abstract Lake high-stand sediments are found in three onshore terraces at Donggi Cona, northeastern Tibetan Plateau, and reveal characteristics of hydrological changes on lake shorelines triggered by climate change, geomorphological processes, neo-tectonic movements. The consist fluvial–alluvial to littoral-lacustrine facies. End-member modeling grain-size distributions allowed quantification sediment transport processes relative levels during times deposition. Radiocarbon dating revealed...
ABSTRACT Sediment distribution is investigated applying grain size analysis to 279 surface samples from the transitional zone between high mountains (Qilian Shan) and their arid forelands (Hexi Corridor) in north‐western China. Six main sediment types were classified. Medium scale (10 3 m) geomorphological setting carefully considered as it may play an important role concerning supply availability. A tripartite of sedimentological landscape units along mountain foreland transition evident....
Abstract Extra-tropical circulation systems impede poleward moisture advection by the Indian Summer Monsoon. In this context, Himalayan range is believed to insulate south Asian from extra-tropical influences and delineate northern extent of Monsoon in central Asia. Paleoclimatic evidence, however, suggests increased availability Early Holocene north which attributed an intensification Nevertheless, mechanisms leading a surpassing maximum summer monsoonal influence remain unknown. Here we...
Aquatic macrophytes from a lacustrine environment are highly prone to reservoir effect, resulting in an overestimation of age. This is often caused by the incorporation dissolved carbon (CO 2 and HCO 3 – ) through photosynthesis lake waters that have different 14 C activity than atmosphere. The atmosphere-water disparity produced mixing between water body its terrestrial surroundings, process temporal variations. Thus, only comprehensive understanding budget over time enables reliable...
Conventional and accelerator mass spectrometry (AMS) radiocarbon, TL, OSL, IRSL dating results on samples from the cores D100 I70 Ejina Basin, one of most important inland basins in arid-hyperarid NW China, show that it is difficult to determine ages sediments at different depths. AMS core demonstrate depths 10 90 m were formed between 14 30 kyr BP. The inverted both imply there was a strong reworking during after deposition processes. also indicate drastic fluctuations groundwater bearing...
Abstract Southern Africa, with its vast arid to semiarid areas, is considered vulnerable precipitation changes and amplifying weather extremes. However, during the last 100 ka, huge lakes existed in currently dry central Kalahari. It has been suggested that these could have due altered atmospheric circulation pattern, leading an increase or annual distribution. Past climate are recorded paleo‐archives, yet, for a proper interpretation of paleo‐records, example, from sedimentological archives...
Abstract Reading the sediment record in terms of past climates is challenging since linking climate change to associated responses sedimentary systems not always straightforward. Here we analyze erosional response landscapes on Tibetan Plateau interglacial forcing. Using theory dynamical Holocene time series geochemical proxies, derive a model that accurately simulates observed proxy variation three lake records. The suggests millennial variations composition reflect self‐organization abrupt...
Abstract Fossil spinicaudatan taxonomy heavily relies on carapace features (size, shape, ornamentation) and palaeontologists have greatly refined methods to study describe variability. Whether alone are sufficient for distinguishing between species of a single genus has remained untested. In our study, we tested common palaeontological 481 individuals the extant Australian Ozestheria that been previously assigned ten based genetic analysis. All morphologically distinct geometric...