Temperature-induced dry climate in basins in the northeastern Tibetan Plateau during the early to middle Holocene

Wu, Duo; Zhou, Aifeng; Zhang, Jiawu; Chen, Jianhui; Li, Guoqiang; Wang, Qiang; Lin, Chen; Madsen, David B.; Abbott, Mark B.; Cheng, Bo; Chen, Fahu

doi:10.1016/j.quascirev.2020.106311

Cited by 48 publications

(31 citation statements)

References 76 publications

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“…This result is consistent with previous results in this region and the northeastern TP (Lu et al, 2011;Stauch et al, 2012;Qiang et al, 2013;Chen et al, 2016). The level of the lake was low and the climate was very dry in basins in the northeastern TP during the early to middle Holocene (Chen et al, 2016;Wu et al, 2020). In the Gonghe Basin in the northwest of the Gannan region, aeolian activity had occurred from 11.8 to 11.0 ka and at approximately 9.4 ka (Qiang et al, 2013); and in the Donggi Cona catchment to the west of the Gannan region, aeolian activity began at ∼10.5 ka (Stauch et al, 2012).…”

Section: Stepwise Weakening Of Aeolian Activities During the Holocenesupporting

confidence: 92%

“…Peat sediment records suggest that the climate remained warm/wet during the early to mid-Holocene, and became relatively cold/dry in the late Holocene (Yu et al, 2006;Sun et al, 2017). The strong aeolian activities related to the high aridity of the early to middle Holocene in the Maqu area could have been caused by higher summer temperatures that drove enhanced evaporation (Wu et al, 2020). Climatic warming-enhanced evaporation has caused an enormous loss of water in the basins of the northeastern TP (Wu et al, 2016).…”

Section: Stepwise Weakening Of Aeolian Activities During the Holocenementioning

confidence: 99%

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Stepwise Weakening of Aeolian Activities During the Holocene in the Gannan Region, Eastern Tibetan Plateau

et al. 2021

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Aeolian sediments hold key information on aeolian history and past environmental changes. Aeolian desertification and extensive land degradation have seriously affected the eco-environment in the Gannan region on the eastern Tibetan Plateau. Understanding the history of aeolian activities can deepen our understanding of the impacts of climatic changes on aeolian activities in the future. This study uses a detailed chronology and multiple proxy analyses of a typical aeolian section in Maqu to reconstruct aeolian activities in the region during the Holocene. Our results showed that aeolian activities have occurred in the eastern Tibetan Plateau since the early Holocene. Magnetic susceptibility, grain size records, and paleosols formation indicated a trend of stepwise weakening in aeolian activities from the early Holocene to the present. The weakening of aeolian activities was divided into three stages: ∼10.0–8.0 ka BP, ∼8.0–4.0 ka BP, and ∼4.0 ka BP to the present. Paleosols were primarily formed after ∼8.0 ka BP, and episodically interrupted aeolian activities processes in the Gannan region. Aeolian activity may increase in the Gannan region as the climate gradually warms. Climatic changes and local hydrological conditions have jointly affected the history of aeolian activities in this region.

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Section: Stepwise Weakening Of Aeolian Activities During the Holocenesupporting

confidence: 92%

Section: Stepwise Weakening Of Aeolian Activities During the Holocenementioning

confidence: 99%

Stepwise Weakening of Aeolian Activities During the Holocene in the Gannan Region, Eastern Tibetan Plateau

et al. 2021

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“…The reconstructed surface temperature over the TP and its adjacent regions was 5-8°C colder than today during the LGM (Xu et al, 2013;. Although there are several paleoenvironmental proxy records spanning the LGM in the northern TP (An et al, 2012;Yan and Wünnemann, 2014;Jin et al, 2015;Wu et al, 2020), most studies in the southern TP cover only the last deglacial and Holocene periods, with only a few extending to the latest stage of the LGM (Gasse et al, 1991;Zhu et al, 2015;Ma et al, 2019;Chen et al, 2020 and references cited there in).…”

Section: Asymmetrical Humidity Variations Between the Northern And Somentioning

confidence: 99%

“…During the LGM, the northern TP became colder, drier and windier, and lakes within this region were much reduced or even desiccated (An et al, 2012;Yan and Wünnemann, 2014;Wu et al, 2020). An intensified East Asian Winter Monsoon (EAWM) entered the western Qaidam Basin through several low altitude mountain passes and moved eastward to influence most areas of the northeastern TP, keeping the Asian summer monsoon (ASM) at bay and causing mean annual precipitation to decrease further (Yang et al, 2017).…”

Section: Asymmetrical Humidity Variations Between the Northern And Somentioning

confidence: 99%

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Climate Conditions on the Tibetan Plateau During the Last Glacial Maximum and Implications for the Survival of Paleolithic Foragers

Liu

et al. 2020

Front. Earth Sci.

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Environmental conditions on the Tibetan Plateau (TP) during the last glacial maximum (LGM) are poorly known. Existing studies of environmental proxies and climate model simulations are contradictory, with interpretations varying between cold-dry and cold-wet environmental conditions which differentially influenced lake volumes, loess deposition and vegetation communities across the TP. Genetic and archaeological studies suggest anatomically modern paleolithic foragers initially occupied the TP between 60 and 30 ka, and may have seasonally occupied the TP during the LGM. Hence, a better understanding for LGM environmental conditions is needed in order to estimate whether paleolithic foragers could have survived on the TP during the extreme LGM cold stage. Here we report the investigation of lacustrine sediments and beach deposits within two paleoshorelines around Dagze Co on the southern TP, ∼22 and ∼42 m higher than the present lake level. Optical age estimates suggest the sediments were deposited during the LGM and mid-Holocene, respectively. TraCE-21 climate model simulation results suggest that net annual LGM precipitation in the Dagze Co basin was lower than the mid-Holocene, but about the same as that of the past 1,000 years. Combining the optical age estimates with TraCE-21 and CAM4 climate model simulation results, we deduce that increased summer precipitation and glacier meltwater supply, combined with decreased lake surface evaporation, produced LGM lake levels ∼22 m higher than present. We also synthesized paleoenvironmental records reported across the TP spanning the LGM. This synthesis suggests that the LGM climate in the northern TP was cold and dry, but that some of the southern TP was cold and wet. These relatively wetter LGM conditions in the southern TP may have favored the growth of cold-resistant plants which, in turn, may have supported larger herbivore populations, and provided food for paleolithic foragers. We conclude that seasonal or short-term human occupation of the TP during the LGM was thus more likely in the southern TP than in the north.

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Holocene hydroclimate changes on the north‐eastern Tibetan Plateau inferred from geochemical records in Lake Gyaring

Ning

Jiang

et al. 2021

J Quaternary Science

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The north-eastern Tibetan Plateau (TP) is an ideal region for understanding the interaction between the Asian Summer Monsoon (ASM) and the Westerlies. Here we present a high-resolution elemental record from Lake Gyaring in the source region of the Yellow River to investigate the paleo-hydroclimate changes over the past ~10 ka. Our results show that lithogenic elements (Ti, Rb, Mn, Ti, Zn and Ni) increased while carbonate-related elements (Ca, Sr and Mg) decreased up the core sediments, indicating that the effective moisture on the north-eastern TP has steadily increased throughout the Holocene. This inference is also supported by the gradual augmentation and diminution of Rb/Sr and Ca/(Ti + Fe + Al) ratios, respectively. The persistent wetting trend on the north-eastern TP inferred from our study disagrees with the Holocene pattern of the ASM but corresponds well with that of the Westerlies. This implies that the strengthening Westerlies since the Holocene might have played a more important role than monsoon circulation in controlling the hydroclimate changes on the north-eastern TP. However, the significant increase in the mid-Holocene might be related to the combined effects of the strengthened ASM and Westerlies. Ultimately, Northern Hemisphere solar insolation and the substantial remnant of ice sheets might have controlled Holocene moisture availability on the north-eastern TP through their influence on the intensity of the Westerlies and ASM as well as Atlantic Ocean sea surface temperatures.

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Temperature-induced dry climate in basins in the northeastern Tibetan Plateau during the early to middle Holocene

Cited by 48 publications

References 76 publications

Stepwise Weakening of Aeolian Activities During the Holocene in the Gannan Region, Eastern Tibetan Plateau

Stepwise Weakening of Aeolian Activities During the Holocene in the Gannan Region, Eastern Tibetan Plateau

Climate Conditions on the Tibetan Plateau During the Last Glacial Maximum and Implications for the Survival of Paleolithic Foragers

Holocene hydroclimate changes on the north‐eastern Tibetan Plateau inferred from geochemical records in Lake Gyaring

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