TY  - GEN
A1  - Licht, Alexis
A1  - Dupont-Nivet, Guillaume
A1  - Pullen, Alex
A1  - Kapp, Paul
A1  - Abels, Hemmo A.
A1  - Lai, Zulong
A1  - Guo, ZhaoJie
A1  - Abell, Jordan
A1  - Giesler, Dominique
T1  - Resilience of the Asian atmospheric circulation shown by paleogene dust provenance
T2  - Postprints der Universität Potsdam : Mathematisch-Naturwissenschaftliche Reihe
N2  - The onset of modern central Asian atmospheric circulation is traditionally linked to the interplay of surface uplift of the Mongolian and Tibetan-Himalayan orogens, retreat of the Paratethys sea from central Asia and Cenozoic global cooling. Although the role of these players has not yet been unravelled, the vast dust deposits of central China support the presence of arid conditions and modern atmospheric pathways for the last 25 million years (Myr). Here, we present provenance data from older (42-33 Myr) dust deposits, at a time when the Tibetan Plateau was less developed, the Paratethys sea still present in central Asia and atmospheric pCO(2) much higher. Our results show that dust sources and near-surface atmospheric circulation have changed little since at least 42 Myr. Our findings indicate that the locus of central Asian high pressures and concurrent aridity is a resilient feature only modulated by mountain building, global cooling and sea retreat.
T3  - Zweitveröffentlichungen der Universität Potsdam : Mathematisch-Naturwissenschaftliche Reihe - 1114 
KW  - Chinese Loess Plateau
KW  - last glacial maximum
KW  - Tibetan Plateau
KW  - Yellow-River
KW  - climate
KW  - basin
KW  - evolution
KW  - ardification
KW  - monsoons
KW  - desert
Y1  - 2021
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:517-opus4-436381
SN  - 1866-8372
IS  - 1114
ER  - 
TY  - JOUR
A1  - Rohrmann, Alexander
A1  - Heermance, Richard
A1  - Kapp, Paul
A1  - Cai, Fulong
T1  - Wind as the primary driver of erosion in the Qaidam Basin, China
JF  - Earth & planetary science letters
N2  - Deserts are a major source of loess and may undergo substantial wind-erosion as evidenced by yardang fields, deflation pans, and wind-scoured bedrock landscapes. However, there are few quantitative estimates of bedrock removal by wind abrasion and deflation. Here, we report wind-erosion rates in the western Qaidam Basin in central China based on measurements of cosmogenic Be-10 in exhumed Miocene sedimentary bedrock. Sedimentary bedrock erosion rates range from 0.05 to 0.4 mm/yr, although the majority of measurements cluster at 0.125 +/- 0.05 mm/yr. These results, combined with previous work, indicate that strong winds, hyper-aridity, exposure of friable Neogene strata, and ongoing rock deformation and uplift in the western Qaidam Basin have created an environment where wind, instead of water, is the dominant agent of erosion and sediment transport. Its geographic location (upwind) combined with volumetric estimates suggest that the Qaidam Basin is a major source (up to 50%) of dust to the Chinese Loess Plateau to the east. The cosmogenically derived wind erosion rates are within the range of erosion rates determined from glacial and fluvial dominated landscapes worldwide, exemplifying the effectiveness of wind to erode and transport significant quantities of bedrock.
KW  - wind
KW  - cosmogenic nuclide-dating
KW  - earth surface processes
KW  - Chinese Loess Plateau
KW  - climate
KW  - Asia
Y1  - 2013
U6  - https://doi.org/10.1016/j.epsl.2013.03.011
SN  - 0012-821X
VL  - 374
SP  - 1
EP  - 10
PB  - Elsevier
CY  - Amsterdam
ER  -