New eolian red clay sequence on the western Chinese Loess Plateau linked to onset of Asian desertification about 25 Ma ago

Qiang, Xiaoke; An, Zhisheng; Song, Yougui; Chang, Hong; Sun, Youbin; Liu, Weiguo; Ao, Hong; Dong, Jibao; Fu, Chaofeng; Wu, Feng; Lu, F. X.; Cai, Yanjun; Zhou, Wei; Cao, Junji; Xu, Xinwen; Ai, Li

doi:10.1007/s11430-010-4126-5

Cited by 279 publications

(185 citation statements)

References 45 publications

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“…This finding not only provides direct evidence of late Oligocene aridification in central Asia, but it also explains speculations of central Asian aridification based on eolian records, such as the appearance of dust deposition in the Junggar Basin [5] and the Loess Plateau [4] during the late Oligocene and the doubling of North Pacific eolian flux from the Eurasian continent during the same period [1,2].…”

Section: Discussionsupporting

confidence: 59%

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Synchronous drying and cooling in central Asia during late Oligocene

et al. 2013

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Aridification of central Asia during late Oligocene and Early Miocene has been documented by numerous eolian records from the North Pacific and central Asia. However, direct evidence of aridity from the interior of the arid zone is still rather scarce. To better reconstruct the climate history in central Asia during the late Oligocene, we have analyzed ostracod assemblages and gypsum content in the sediments from the lacustrine Jingou River section in the northern Tianshan Mountains. Our results show that the cold water species Candona cf. Neglecta and Pseudocandona albicans replaced the warm water species Ilyocypris bradyi and Ilyocypris sp. to become the dominant species at 23.8 Ma, indicating significant cooling in central Asia at that time. At the same time, a substantial increase in gypsum content indicates the intensification of central Asian drying. The synchronous cooling and drying approximately coincided with the Oi2b.1 and/or Mi1 events, implying a causal linkage between late Oligocene global cooling and central Asian aridity.

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Section: Discussionsupporting

confidence: 59%

“…Eolian records in deep-sea sediments [1,2] and dust deposits from the periphery of arid regions [3,4] have shown that central Asian aridity began to intensify from the late Oligocene to the early Miocene. Eolian deposits within central Asian arid regions [5] have implied that an arid pattern similar to that of today may have formed before the late Oligocene.…”

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confidence: 99%

Synchronous drying and cooling in central Asia during late Oligocene

et al. 2013

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“…Meanwhile, the eolian deposition also recorded the long-term process of aridification in inland Asia. The oldest eolian loess found in northern China appeared in the early Miocene (22)(23)(24)(25) [4,33,34], a critical period around which the environment transformed from a planetary circulation system into a monsoon-dominated pattern, as indicated by integrated studies of Asian paleoenvironmental records [35][36][37]. Both continental [38] and marine [39] eolian deposition records showed that aridification of inland Asia was significantly intensified during recent 3-4 Ma since the Pliocene.…”

Section: Geological Recordsmentioning

confidence: 99%

“…The reliability of the simulated response to the regional uplift also needs to be further improved, especially to consider how to reduce the dependence of the simulated results on the model and to lower the uncertainty on subcontinent scales. With regard to environmental change, eolian sediments in northern China [4,33,37], river and lake sediments [99], and reconstructions of environmental patterns from the geological-biological evidence [8,36,37] suggested that the formation of the East Asian monsoon was around 22-25 Ma. However, most of geological evidences about the South Asian monsoon were too short and the longest record was only about 12 Ma [29].…”

Section: Origin Of the South Asian And East Asian Monsoonsmentioning

confidence: 99%

Influence of the Tibetan Plateau uplift on the Asian monsoon-arid environment evolution

2013

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As one of the most important geological events in Cenozoic era, the uplift of the Tibetan Plateau (TP) has had profound influences on the Asian and global climate and environment evolution. During the past four decades, many scholars from China and abroad have studied climatic and environmental effects of the TP uplift by using a variety of geological records and paleoclimate numerical simulations. The existing research results enrich our understanding of the mechanisms of Asian monsoon changes and interior aridification, but so far there are still a lot of issues that need to be thought deeply and investigated further. This paper attempts to review the research on the influence of the TP uplift on the Asian monsoon-arid environment, summarize three types of numerical simulations including bulk-plateau uplift, phased uplift and sub-regional uplift, and especially to analyze regional differences in responses of climate and environment to different forms of tectonic uplifts. From previous modeling results, the land-sea distribution and the Himalayan uplift may have a large effect in the establishment and development of the South Asian monsoon. However, the formation and evolution of the monsoon in northern East Asia, the intensified dryness north of the TP and enhanced Asian dust cycle may be more closely related to the uplift of the main body, especially the northern part of the TP. In this review, we also discuss relative roles of the TP uplift and other impact factors, origins of the South Asian monsoon and East Asian monsoon, feedback effects and nonlinear responses of climatic and environmental changes to the plateau uplift. Finally, we make comparisons between numerical simulations and geological records, discuss their uncertainties, and highlight some problems worthy of further studying.Tibetan Plateau, tectonic uplift, Asian monsoon, inland aridity, environmental evolution, geological record, numerical simulation Citation:Liu X D, Dong B W.

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“…Sun and Wang, 2005). The oldest loess deposits have now been dated to be 22 Ma (Guo et al, 2002) and possible even slightly older (Qiang et al, 2011). Recently it has been demonstrated, from the stratigraphy in the Xining Basin, that Asian palaeoenvironment is also governed by global climate changes.…”

Section: General Geologymentioning

confidence: 99%

A late Eocene palynological record of climate change and Tibetan Plateau uplift (Xining Basin, China)

Hoorn

Straathof

Abels

et al. 2012

Palaeogeography, Palaeoclimatology, Palaeoecology

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General rightsIt is not permitted to download or to forward/distribute the text or part of it without the consent of the author(s) and/or copyright holder(s), other than for strictly personal, individual use, unless the work is under an open content license (like Creative Commons). Disclaimer/Complaints regulationsIf you believe that digital publication of certain material infringes any of your rights or (privacy) interests, please let the Library know, stating your reasons. In case of a legitimate complaint, the Library will make the material inaccessible and/or remove it from the website. Please Ask the Library: http://uba.uva.nl/en/contact, or a letter to: Library of the University of Amsterdam, Secretariat, Singel 425, 1012 WP Amsterdam, The Netherlands. You will be contacted as soon as possible. Climate models suggest that Asian paleoenvironments, monsoons and continental aridification were primarily governed by tectonic uplift and sea retreat since the Eocene with potential contribution of global climate changes. However, the cause and timing of these paleoenvironmental changes remain poorly constrained. The recently well-dated continental mudflat to ephemeral saline lake sedimentary succession, situated in the Xining Basin at the northeastern margin of the Tibetan Plateau (NW China), provides a unique opportunity to develop additional proxy successions in this area that are placed accurately in time. Here, a palynological record from this succession is reported. High abundances of desert and steppe-desert taxa such as Ephedripites and Nitrariadites/Nitraripollis are found, which can be differentiated by the presence of broad leaved deciduous forest taxa in the lower part of the section (particularly up to 36.4 Ma; magnetochron C16r), and a sudden increase of Pinaceae (Pinuspollenites, Piceaepollenites and Abiespollenites) which is dated at 36.1 Ma (C16n.2n). Coexistence Approach (CoA) indicates that from 39.9 to 36.4 Ma (C17n.1n) regional climate was warm and wet, while from 36.4 to 33.5 Ma (C16n.2n-C13r) climate tends to be cooler and drier. The data indicate that paleoenvironmental and palynological changes on the NE part of the Tibetan Plateau resulted from a combination of long-term tectonic uplift forcing and long-and short-term climate changes. The increase of taxa such as Piceaepollenites and Abiespollenites indicates not only a cooling and drying trend prior to the Eocene/Oligocene (E/O) boundary, but also the existence of high altitude mountain habitats in the periphery of the Xining Basin. The sudden Pinaceae event correlates closely in time with a marked aridification step as viewed from the lithology of the Xining Basin that was linked to the sea retreat out of the Tarim Basin.

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New eolian red clay sequence on the western Chinese Loess Plateau linked to onset of Asian desertification about 25 Ma ago

Cited by 279 publications

References 45 publications

Synchronous drying and cooling in central Asia during late Oligocene

Synchronous drying and cooling in central Asia during late Oligocene

Influence of the Tibetan Plateau uplift on the Asian monsoon-arid environment evolution

A late Eocene palynological record of climate change and Tibetan Plateau uplift (Xining Basin, China)

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