Constraining Holocene lake-level highstands on the Tibetan Plateau by 10Be exposure dating: a case study at Tangra Yumco, southern Tibet

Rades, Eike F.; Hetzel, Ralf; Xu, Qiang; Ding, Lin

doi:10.1016/j.quascirev.2013.09.016

Cited by 54 publications

(64 citation statements)

References 40 publications

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“…After ca 9.5 cal ky BP the lake level dropped again, favored the formation of terrace T3, and formed the lower paleoshorelines, as has also been reported from the Tangra Yumco (Rades et al, 2014). The lake area shrank to 372 km 2 (4602-4605 m elevation, shoreline S7 in Figs.…”

Section: Morphodynamic Linkages and Climatic Implicationssupporting

confidence: 65%

Morphodynamics and lake level variations at Paiku Co, southern Tibetan Plateau, China

Wünnemann

Yan

2015

Geomorphology

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Section: Morphodynamic Linkages and Climatic Implicationssupporting

confidence: 65%

Morphodynamics and lake level variations at Paiku Co, southern Tibetan Plateau, China

Wünnemann

Yan

2015

Geomorphology

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“…8). The Holocene lake-level highstand of Zhari Namco at 128 m (Chen et al, 2013) is near to the 130-135 m of Tangra Yum Co as described by Rades et al (2013). There is a hiatus in the chronology of Chen et al (2013) during the period where our data shows a decreased rate for the lake-level fall (Fig.…”

Section: Comparison With Other Lake-level Histories On the Tibetan Plsupporting

confidence: 56%

“…Therefore their samples may also have been affected by anomalous fading thus underestimated the true depositional age. 10 Be exposure ages of strath terraces located~140 m and~180 m above the current lake level of Tangra Yum Co (Rades et al, 2013) Figure 8. (a) Elevation above the lake plotted against the ages of the beach ridges.…”

Section: Comparison With Other Lake-level Histories On the Tibetan Plmentioning

confidence: 99%

“…Selin Co, the easternmost lake, had smaller lake-level changes during the Holocene. The three samples encircled in with the dashed line are the ages of the lower terrace from the study of Rades et al (2013) discussed in Comparison with other lake-level histories on the Tibetan Plateau. (b) Synthezied results of the Moisture index p in the monsoonal region of China after Zhang et al (2011).…”

Section: Comparison With Other Lake-level Histories On the Tibetan Plmentioning

confidence: 99%

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A lake-level chronology based on feldspar luminescence dating of beach ridges at Tangra Yum Co (Southern Tibet)

et al. 2015

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Many lakes on the Tibetan Plateau exhibit strandplains with a series of beach ridges extending high above the current lake levels. These beach ridges mark former lake highstands and therefore dating their formation allows the reconstruction of lake-level histories and environmental changes. In this study, we establish a lake-level chronology of Tangra Yum Co (fifth largest lake on the Tibetan Plateau) based on luminescence dating of feldspar from 17 beach-ridge samples. The samples were collected from two strandplains southeast and north of the lake and range in elevation from the current shore to 140 m above the present lake. Using a modified post-infrared IRSL protocol at 170°C we successfully minimised the anomalous fading in the feldspar IRSL signal, and obtained reliable dating results. The luminescence ages indicate three different stages of lake-level decline during the Holocene: (1) a phase of rapid decline (~50 m) from~6.4 to~4.5 ka, (2) a period of slow decline betweeñ 4.5 and~2.0 ka (~20 m), and (3) a fast decline by 70 m between~2 ka and today. Our findings suggest a link between a decrease in monsoonal activity and lake-level decline since the early Holocene.

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“…Drying at around 4.2 ka is also related to abrupt deforestation in the western Mediterranean region (28) and to the reactivation of dune systems on the margins of the Sahara (29). On the Tibetan Plateau, 10 Be exposure ages on shoreline features of Lake Tangra Yumco indicate recession from a highstand of 143 m above the current lake at 4.3 ± 0.3 ka, associated with a weakening monsoon (30). Closer to the Hunshandake Sandy Lands, pollen records from the temperate steppe of northern China indicate a dominance of forests and a maximum in wet conditions between 8 and 4 ka, as well as noticeable decline in tree pollen at ca.…”

Section: Discussionmentioning

confidence: 99%

Groundwater sapping as the cause of irreversible desertification of Hunshandake Sandy Lands, Inner Mongolia, northern China

Yang

Scuderi

Wang

et al. 2015

Proc. Natl. Acad. Sci. U.S.A.

134

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In the middle-to-late Holocene, Earth’s monsoonal regions experienced catastrophic precipitation decreases that produced green to desert state shifts. Resulting hydrologic regime change negatively impacted water availability and Neolithic cultures. Whereas mid-Holocene drying is commonly attributed to slow insolation reduction and subsequent nonlinear vegetation–atmosphere feedbacks that produce threshold conditions, evidence of trigger events initiating state switching has remained elusive. Here we document a threshold event ca. 4,200 years ago in the Hunshandake Sandy Lands of Inner Mongolia, northern China, associated with groundwater capture by the Xilamulun River. This process initiated a sudden and irreversible region-wide hydrologic event that exacerbated the desertification of the Hunshandake, resulting in post-Humid Period mass migration of northern China’s Neolithic cultures. The Hunshandake remains arid and is unlikely, even with massive rehabilitation efforts, to revert back to green conditions.

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Constraining Holocene lake-level highstands on the Tibetan Plateau by 10Be exposure dating: a case study at Tangra Yumco, southern Tibet

Cited by 54 publications

References 40 publications

Morphodynamics and lake level variations at Paiku Co, southern Tibetan Plateau, China

Morphodynamics and lake level variations at Paiku Co, southern Tibetan Plateau, China

A lake-level chronology based on feldspar luminescence dating of beach ridges at Tangra Yum Co (Southern Tibet)

Groundwater sapping as the cause of irreversible desertification of Hunshandake Sandy Lands, Inner Mongolia, northern China

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