Monsoonal forcing of Holocene paleoenvironmental change on the central Tibetan Plateau inferred using a sediment record from Lake Nam Co (Xizang, China)

Doberschütz, Stefan; Frenzel, Peter; Haberzettl, Torsten; Kasper, Thomas; Wang, Junbo; Zhu, Liping; Daut, Gerhard; Schwalb, Antje; Mäusbacher, Roland

doi:10.1007/s10933-013-9702-1

Cited by 58 publications

(61 citation statements)

References 43 publications

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“…This period of incision may be related to the Neoglacial period of glacier advances because of a cooling trend and an ISM-related reduction in effective moisture supply. According to a lake record at Paru Co, northeast of Lhasa (Bird et al, 2014), the ISM tended toward drier conditions after 5.2 ky and after 4.8 cal ky at Nam Co (Doberschütz et al, 2014), corroborating our assumption.…”

Section: Morphodynamic Linkages and Climatic Implicationssupporting

confidence: 83%

“…The 13.8 ky BP old peat deposits at a slightly higher position (Deng and Liu, 1998) support our assumption of climate warming and a more positive precipitation-evaporation (P/E) ratio. A warm and moist phase accompanied by increased water inflow between 14 and 13 cal ky and after 10.8 cal ky BP with a peak in the high lake level at 9.4 cal ky BP was also reported for Nam Co (Doberschütz et al, 2014;Kasper et al, 2015).…”

Section: Morphodynamic Linkages and Climatic Implicationssupporting

confidence: 56%

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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: 83%

Section: Morphodynamic Linkages and Climatic Implicationssupporting

confidence: 56%

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

Wünnemann

Yan

2015

Geomorphology

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“…The chronology of the complete NC 08/01 sediment core is based on 24 AMS 14 C ages (Beta Analytic, Miami, USA) obtained from bulk sediment samples (Doberschütz et al 2014;Kasper et al 2015 (Kasper et al 2015). A reservoir effect of 1420 14 C years was inferred from the age of the core sediment-water interface and was subtracted from all radiocarbon ages prior to calibration (Doberschütz et al 2014 (Werner and Brand 2001).…”

Section: Field Samplingmentioning

confidence: 99%

“…A reservoir effect of 1420 14 C years was inferred from the age of the core sediment-water interface and was subtracted from all radiocarbon ages prior to calibration (Doberschütz et al 2014 (Werner and Brand 2001).…”

Section: Field Samplingmentioning

confidence: 99%

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Biogeochemical evidence for freshwater periods during the Last Glacial Maximum recorded in lake sediments from Nam Co, south-central Tibetan Plateau

et al. 2015

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Improved knowledge of deglaciation processes during the termination of the Last Glacial Maximum on the Tibetan Plateau can provide important information for understanding deglaciations in climate-sensitive high-altitude ecosystems. Little, however, is known about this time interval because most lacustrine sediment records from the Tibetan Plateau are younger than 19,000 years. This study focused on a lake sediment record from Nam Co, south-central Tibetan Plateau, covering the interval from *23.7 to 20.9 cal ka BP. We analysed the distribution and compound-specific hydrogen isotope composition (dD) of sedimentary n-alkanes, as well as the bulk sediment TOC, TN, d13 C org and d 15 N composition, to infer lake system development. Pronounced changes in environmental conditions between *21.6 and 21.1 cal ka BP, as well as between 23.1 and 22.5 cal ka BP (Greenland Interstadial 2), were inferred from increased aquatic nalkane amounts and decreased dD n-C23 values within these time intervals, respectively. Freshwater inputs, which most likely resulted from enhanced glacier melting, caused these changes. Our results suggest that mountain glacier retreat on the Tibetan Plateau started earlier than previously assumed. The required energy for thawing was probably provided by temperature changes caused by reorganization of atmospheric circulation, which has also been recorded in Greenland ice records.

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Hydrological variations on the Central Tibetan Plateau since the Last Glacial Maximum and their teleconnection to inter‐regional and hemispheric climate variations

Kasper

Haberzettl

Wang

et al. 2015

J Quaternary Science

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Decadal to sub‐decadal variability of inflow, evaporation and biological productivity derived from Lake Nam Co was used to reconstruct hydrological changes for the past ca. 24 k cal a BP. The timing of these variations corresponds to known climatic shifts on the Northern Hemisphere. After a dry and cold Last Glacial Maximum the lake level of Nam Co initially rose at ca. 20 k cal a BP. Moist but further cold conditions between ca. 16.2 and 14 k cal a BP correspond to Heinrich Event 1. A warm and moist phase between ca. 14 and 13 k cal a BP is expressed as a massive enhancement in inflow and biological productivity and might be associated with a first intensification of the Indian Ocean Summer Monsoon coinciding with the Bølling–Allerød complex. A two‐step decrease in inflow and a contemporaneous decline in biological productivity until ca. 11.8 k cal a BP points to cool and dry conditions during the Younger Dryas. Lake levels peak at ca. 9.4 k cal a BP, although hydrological conditions remain relatively stable during the Holocene with only low‐amplitude variations observed.

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Monsoonal forcing of Holocene paleoenvironmental change on the central Tibetan Plateau inferred using a sediment record from Lake Nam Co (Xizang, China)

Cited by 58 publications

References 43 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

Biogeochemical evidence for freshwater periods during the Last Glacial Maximum recorded in lake sediments from Nam Co, south-central Tibetan Plateau

Hydrological variations on the Central Tibetan Plateau since the Last Glacial Maximum and their teleconnection to inter‐regional and hemispheric climate variations

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