نتایج جستجو برای: loess deposits

تعداد نتایج: 31955  

Journal: :Ambio 2014
Yafeng Wang Liding Chen Yang Gao Shuai Wang Yihe Lü Bojie Fu

Check-dams are the most common structures for controlling soil erosion in the Loess Plateau. However, the effect of check-dams on carbon sequestration, along with sediment transport and deposition, has not been assessed over large areas. In this study, we evaluated the carbon sequestration function of check-dams in the Loess Plateau. The results indicate that there were approximately 11 000 che...

Journal: :Frontiers in Earth Science 2022

The loess deposits widely distributed in the eastern Tibetan Plateau (ETP) are important archives for reconstructing paleoenvironmental changes and dust transportation history of Plateau. A lack sufficient investigations on source ETP has limited our understanding implications. Quartz luminescence sensitivity holds great potential tracing eolian sources. Numerous quartz have provided new insigh...

2017
Gábor Újvári Thomas Stevens Mihály Molnár Attila Demény Fabrice Lambert György Varga A J Timothy Jull Barna Páll-Gergely Jan-Pieter Buylaert János Kovács

Centennial-scale mineral dust peaks in last glacial Greenland ice cores match the timing of lowest Greenland temperatures, yet little is known of equivalent changes in dust-emitting regions, limiting our understanding of dust-climate interaction. Here, we present the most detailed and precise age model for European loess dust deposits to date, based on 125 accelerator mass spectrometry 14C ages...

2016
Yang Kong Xuefeng Huang Huaining Ruan Zhende Zhu Chong Shi

In many regions in China there is a wide distribution of dead-weight collapsible loess that experience frequent disasters resulting in enormous losses to national property. Loess collapsibility is the leading cause of disasters in loess areas. Many international scholars are working collaboratively to avoid property losses and human casualties caused by the collapsible loess. Loess collapsibili...

2012
Davor Pavelić

The Zmajevac loess-palaeosol succession (LPS) of the northeastern Baranja loess plateau is exposed along the southern slope of Bansko Brdo, on the western bank of the Danube River. The investigated 17.5-m-thick section shows 4 palaeosol, 1 loess-like and 6 loess horizons. Their integrative palaeoenvironmental analysis combines quantified data from the mollusc record, magnetic susceptibility, gr...

2017
E. Arthur Bettis Daniel R. Muhs Helen M. Roberts Ann G. Wintle

The conterminous United States contains an extensive and generally well-studied record of Last Glacial loess. The loess occurs in diverse physiographic provinces, and under a wide range of climatic and ecological conditions. Both glacial and non-glacial loess sources are present, and many properties of the loess vary systematically with distance from loess sources. United States’ midcontinent L...

Journal: :Frontiers in Earth Science 2022

Loess is a ubiquitous, silty aeolian sediment common across the semiarid to subhumid regions in Northern Hemisphere. As such, physical characteristics of loess sediment, such as modal grain size and quartz crystallinity index, have potential inform us about dust transport pathways corresponding atmospheric circulation responsible for entrainment, transport, deposition. In this article, we combi...

2015
Paul Kapp Alex Pullen Jon D. Pelletier Joellen Russell Paul Goodman Fulong Cai

The Ordos Basin of China encompasses the Mu Us Desert in the northwest and the Chinese Loess Plateau to the south and east. The boundary between the mostly internally drained Mu Us Desert and fluvially incised Loess Plateau is an erosional escarpment, up to 400 m in relief, composed of Quaternary loess. Linear ridges, with lengths of ~102–103 m, are formed in Cretaceous–Quaternary strata throug...

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