Orbital forcing of Plio-Pleistocene climate variation in a Qaidam Basin lake based on paleomagnetic and evaporite mineralogic analysis

Luo, Zhi; Su, Q.; Wang, Zhao; Heermance, Richard V.; Garzione, Carmala N.; Li, Man; Ren, Xiuxiu; Song, Yougui; Nie, Junsheng

doi:10.1016/j.palaeo.2017.09.022

Cited by 19 publications

(26 citation statements)

References 51 publications

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“…These out‐of‐the‐order grain size coarsening events within interglacials correspond well with insolation maxima paced by orbital eccentricity (arrows in Figures 6h and 6j), an observation that is supported by recent studies that infer an increased imprint of eccentricity, and in association precession, in the Qaidam Basin under high eccentricity amplitudes (Luo et al, 2018; Su et al, 2019; Su et al, 2019). During eccentricity maxima the amplitude of precession is larger, causing a summer season lengthening and thus potentially enhanced EASM precipitation (Berger, 1988; Braconnot et al, 2008).…”

Section: Resultssupporting

confidence: 83%

Sedimentological Evidence for Pronounced Glacial‐Interglacial Climate Fluctuations in NE Tibet in the Latest Pliocene to Early Pleistocene

Yin

Dewald

Kaboth‐Bahr

et al. 2020

Paleoceanog and Paleoclimatol

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The intensification of Northern Hemisphere glaciation (iNHG) and uplift of the Tibetan Plateau have been argued to be among the main drivers of climate change in midlatitude Central Asia during the Pliocene/Pleistocene. While most proxy records that support this hypothesis are from regions outside the Tibetan Plateau (such as from the Chinese Loess Plateau), detailed paleoclimatic information for the plateau itself during that time has yet remained elusive. Here we present a temporally highly resolved (~500 years) sedimentological record from the Qaidam Basin situated on the northeastern Tibetan Plateau that shows pronounced glacial-interglacial climate variability during the interval from 2.7 to 2.1 Ma. Glacial (interglacial) intervals are generally characterized by coarser (finer) grain size, minima (maxima) in organic matter content, and maxima (minima) in carbonate content. Comparison of our results with Earth's orbital parameters and proxy records from the Chinese Loess Plateau suggests that the observed climate fluctuations were mainly driven by changes in the Siberian High/East Asian winter monsoon system as a response to the iNHG. They are further proposed to be enhanced by the topography of the Tibetan Plateau and its impact on the position and intensity of the westerlies.Representing the largest continental plateau on Earth, the Tibetan Plateau has a substantial impact on the Earth's climate evolution during the Late

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Section: Resultssupporting

confidence: 83%

Sedimentological Evidence for Pronounced Glacial‐Interglacial Climate Fluctuations in NE Tibet in the Latest Pliocene to Early Pleistocene

Yin

Dewald

Kaboth‐Bahr

et al. 2020

Paleoceanog and Paleoclimatol

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“…The magnetic precipitation proxy record χ fd /HIRM shows similar patterns: large‐amplitude fluctuations between 5 × 10 −6 and 35 × 10 −6 Am −1 before ~3.3 Ma with dominant 100‐kyr cyclicity (Figure S2b) but damped changes ranging from 5 to 20 × 10 −6 Am −1 after ~3.3 Ma (Figure ). The published halite content record from the section also displays a clear change at ~3.3 Ma toward greater percent halite (Luo et al, ; Figure ).…”

Section: Resultsmentioning

confidence: 89%

“…(b) χ fd /HIRM (black line) and >63‐μm fraction grain size record (green line) of the Huatugou section in the western Qaidam Basin. (c) Huatugou halite content record (Luo et al, ). (d) Aragonite content record from the SG1 core in the western Qaidam Basin (Fang et al, ).…”

Section: Resultsmentioning

confidence: 99%

“…At the same time, stronger precipitation increased erosion, resulting in more coarse grains being released from bedrock and transported to the depositional region. The presence of halite throughout the section indicates that the lake was persistently shallow (i.e., playa), and therefore lake (Luo et al, 2018). (d) Aragonite content record from the SG1 core in the western Qaidam Basin (Fang et al, 2016).…”

Section: Environmental Implications Of χ Fd /Hirm and Grain Size Varimentioning

confidence: 99%

“…) but damped changes ranging from 5 to 20 × 10 −6 Am −1 after~3.3 Ma(Figure 2). The published halite content record from the section also displays a clear change at~3.3 Ma toward greater percent halite(Luo et al, 2018;Figure 2).…”

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confidence: 90%

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Central Asian Drying at 3.3 Ma Linked to Tropical Forcing?

Nie

Meng

et al. 2019

Geophysical Research Letters

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The processes controlling middle‐latitude environmental changes are poorly understood. Both high‐latitude ice sheets and tropical oceans can affect climate and environments in middle latitudes, but separating their relative contribution is challenging. Coincidence of intensive Northern Hemisphere glaciations and increased dust accumulation rates at ~2.7 Ma on the Chinese Loess Plateau and North Pacific Ocean is often used to indicate high latitudes' dominant role on middle‐latitude climate change. Here we present new and compile available evidence from the Qaidam Basin and the Tarim Basin of central Asia demonstrating a phase of drying at ~3.3 Ma. The drying is synchronous with proposed timing of closure of the Indonesian Seaway, which has been suggested to cause significant oceanic surface heat adjustments and corresponding decreased heat and moisture transport to middle/high latitudes. These new results suggest a tropical forcing of aridification for the late Pliocene central Asian environmental evolution.

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