Aeolian deposits at the southeastern margin of the Tengger Desert (China): Implications for surface wind strength in the Asian dust source area over the past 20,000years

Qiang, Mingrui; Chen, Fahu; Wang, Zhenting; Niu, Guangming; Song, Lei

doi:10.1016/j.palaeo.2009.12.005

Cited by 57 publications

(51 citation statements)

References 57 publications

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“…Furthermore, the study of these terrestrial records can elucidate variations in past atmospheric circulation patterns and wind direction through: (i) the quantification of past dust fluxes, hence the study of past wind strength (e.g. Qiang et al, 2010) and/or the availability of fine grained material in the source region; and (ii) the study of the dominant dust sources through the determination of provenance tracers (e.g. Kylander et al, 2007).…”

Section: Introductionmentioning

confidence: 99%

The inorganic geochemistry of a peat deposit on the eastern Qinghai-Tibetan Plateau and insights into changing atmospheric circulation in central Asia during the Holocene

Ferrat

Weiss

Spiro

et al. 2012

Geochimica et Cosmochimica Acta

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Section: Introductionmentioning

confidence: 99%

The inorganic geochemistry of a peat deposit on the eastern Qinghai-Tibetan Plateau and insights into changing atmospheric circulation in central Asia during the Holocene

Ferrat

Weiss

Spiro

et al. 2012

Geochimica et Cosmochimica Acta

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“…Age inversions may simply arise from dating uncertainties or may imply that the sedimentary unit was accretional during a period of fast deposition. TL dating results from the bottom and top of an aeolian sand unit from the Xiangshan section (Qiang et al, 2000) obtained south of Zhongwei city provided ages of 19.12±1.40 ka and 11.40±0.80 ka, respectively, and an OSL sample from the central part of this unit yielded an age of 12.19±1.16 ka (Qiang et al, 2010).…”

Section: Determining D E and Calculating Agesmentioning

confidence: 99%

“…Sedimentary rates from this deposit layer were estimated at 45.6 and 68.4 cm/ka, which were determined for the intervals from 19.12 to 12.19 and from 12.19 to 11.14 ka, respectively (Qiang et al, 2010), reflecting fast expansion and accumulation of sand dunes during this period. These two ages (i.e.…”

Section: Regional Aeolian Activity Revealed By Osl Chronologies and Tmentioning

confidence: 99%

“…7.97±0.33 ka) obtained from the top of section S202-25, suggesting that sand dunes stabilized during this period. OSL dating has recently shown ages from the bottom and top of a paleosol layer from the Xiangshan section at 10.59±1.83 and 7.21±0.55 ka, respectively (Qiang et al, 2010). An organic paleosol sample from the Baiyangou section at the southern margin of the Tengger Desert yielded a 14 C age of 8.56±0.046 ka BP .…”

Section: Figmentioning

confidence: 99%

“…OSL methods have revolutionized palaeoclimatic research in desert regions and have been applied widely in dating sandy deposits from dune fields in northern China (Li et al, 2002(Li et al, , 2007Li and Sun, 2006;Sun et al, 2006;Yang et al, 2010;Liu et al, 2012;Long et al, 2012;Yu and Lai, 2012;Zhao et al, 2012). More recently, OSL dating techniques have been used to date aeolian samples from the southern Tengger Desert (Qiang et al, 2010;Feng et al, 2013). As a result, limited high-quality chronological data are available, impeding our understanding of the history of aeolian activity in this region.…”

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confidence: 99%

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Optically stimulated luminescence dating of sandy deposits from Gulang county at the southern margin of the Tengger Desert, China

2015

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Aeolian deposits from the deserts in northern China have been used for palaeoenvironmental research to understand aeolian sedimentology and its dynamic connection to past climate conditions. The Tengger Desert in China is sensitive to the waxing and waning of the monsoonal system. In response to past climate change, the southern margin of the Tengger Desert has evolved significantly since the last glacial period. However, previous attempts to date aeolian deposits in this region were mainly based on radiocarbon dating, which has problems when applied to aeolian deposits. Moreover, sedimentary records are limited. Accordingly, past aeolian activity in this desert remains poorly understood. In the present study, we dated sand samples from Gulang county at the southern margin of the Tengger Desert using optically stimulated luminescence (OSL) to understand the history of aeolian activity in this region. Our samples represented well-sorted aeolian sands and sandy loess. Aeolian sands are evidence of dune field buildup and sparse vegetation cover whereas sandy loess is evidence of improved stabilization of sand dunes resulting from ameliorated vegetation cover. Certain samples showed a decline in the equivalent dose (D e ) values when successive integration intervals were applied, which resulted from unstable OSL signals from non-fast components in the initial part of the decay curve. In order to obtain reliable D e estimates, we investigated component-resolved and different background subtraction approaches, and compared the resultant D e estimates. We adopted the early background subtraction method to derive D e values. Luminescence chronologies and sedimentary records indicated that sand dunes accumulation occurred before 10 ka, and sandy loess developed between 9.5 and 7.6 ka when sand dunes were stabilized as a result of increased effective moisture levels. The transition between sand dune mobilization and stabilization emphasizes the significance of an effective moisture threshold in controlling aeolian activity. Mobilization of sand dunes at ~2.3 ka might be related to an increased aridity during the Late Holocene.Citation: PENG Jun, DONG Zhibao, HAN Fengqing. 2015. Optically stimulated luminescence dating of sandy deposits from Gulang county at the southern margin

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Decoupling of Climatic Drying and Asian Dust Export During the Holocene

Luo

et al. 2018

JGR Atmospheres

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Both paleoclimatic records and models suggest that the dust accumulation in ice cores and marine sediments, which is often regarded as a direct record of changing atmospheric dust loading and used to estimate its climatic impact, is strongly coupled to the aridity of dust source regions. However, the underlying association of this couple has not been tested directly because of the lack of continuous and well‐dated independent records of eolian activity in dust source regions. Here we present a high‐resolution multiproxy record of the Holocene eolian activity and climate changes from Lake Xiarinur in north China, a major Asian dust source region. Our data, together with the records of Asian dust accumulation in downwind areas, including the North Pacific Ocean and Greenland, suggest a decoupling between long‐distant Asian dust export and climatic drying in the Holocene. Although the climate was humid and the eolian activity was weak in the source region during the early Holocene, the dust accumulation in the North Pacific Ocean and Greenland was relatively high. Similarly, while climatic drying and strong eolian activity occurred in north China during the late Holocene, the rate of dust accumulation in the downwind areas was low. The long‐distant export of Asian dust is closely correlated with the strength of the Siberian High rather than the westerlies as widely believed before. The rate of dust accumulation in the GISP2 Greenland ice core is comparable in patterns with the intensity of the Siberian High forced eolian activity on both millennial and centennial time scales.

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Aeolian deposits at the southeastern margin of the Tengger Desert (China): Implications for surface wind strength in the Asian dust source area over the past 20,000years

Cited by 57 publications

References 57 publications

The inorganic geochemistry of a peat deposit on the eastern Qinghai-Tibetan Plateau and insights into changing atmospheric circulation in central Asia during the Holocene

The inorganic geochemistry of a peat deposit on the eastern Qinghai-Tibetan Plateau and insights into changing atmospheric circulation in central Asia during the Holocene

Optically stimulated luminescence dating of sandy deposits from Gulang county at the southern margin of the Tengger Desert, China

Decoupling of Climatic Drying and Asian Dust Export During the Holocene

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