Coupled erosion, climate, and vegetation drove post-MPT maxima in Asian dust activity
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GRAPHICAL ABSTRACT
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PUBLIC SUMMARY
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Central Asia showed enhanced aridification after ~0.8 Ma, with periodicity shifting from 41 kyr to 100 kyr.
Asian dust emissions and transport peaked after ~1.0–0.8 Ma, with enhanced glacial–interglacial variability.
Global cooling drove Asian dust activity by influencing erosion, climate, and vegetation.
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ABSTRACT
The mid-latitude Asian regions are the world’s second-largest dust source and are sensitive to global climate change. However, the paucity of inland dust records limits our understanding of regional atmospheric circulation, Asian aridification, and the global climatic and ecological impacts of dust emissions. Here, we present the first high-resolution dust flux record from the arid regions of Central Asia, west of the Pamir Plateau, covering the past 2.7 Myr. By integrating this new record with a compilation of existing datasets, we show that enhanced aridification occurred in Central Asia after ~0.8 Ma, with a dominant periodicity shift from 41-kyr to 100-kyr during the Mid-Pleistocene Transition (MPT). Further, a source-to-sink spatial comparison of dust fluxes indicates that Asian dust activity reached its highest levels after the MPT, accompanied by increased amplitude of glacial–interglacial fluctuations. These patterns correspond strongly with variations in global ice volume across the time–frequency domains, implying a strong coupling between Asian dust activity and global cooling. We propose that, in addition to an arid climate, intensified glacial erosion, and reduced vegetation cover are critical drivers of enhanced Asian dust emissions and transport during periods of global cooling. Under ongoing and projected future global warming, the rapid glacier retreat across the Tibetan Plateau and surrounding mountains, along with regionally increased precipitation and enhanced vegetation cover in dust source regions, may reduce the availability of fine-grained, erodible sediments and stabilize surface soils, gradually weakening Asian dust emissions and their influence on marine productivity and biodiversity in downwind oceans.-
Keywords:
- Central Asian loess /
- Dust activity /
- Quaternary paleoclimate /
- Global cooling /
- Glacial erosion
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Ning W., Zan J., Zeeden C., et al. (2026). Coupled erosion, climate, and vegetation drove post-MPT maxima in Asian dust activity. The Innovation Geoscience 4:100239. https://doi.org/10.59717/j.xinn-geo.2026.100239
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Ning W., Zan J., Zeeden C., et al. (2026). Coupled erosion, climate, and vegetation drove post-MPT maxima in Asian dust activity. The Innovation Geoscience 4:100239. https://doi.org/10.59717/j.xinn-geo.2026.100239
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Figure 1.
Spatial distribution of atmospheric dust deposition across the Eurasian continent for the period 1998–2010
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Figure 2.
Synthesis of the initiation time and spatial distribution of major deserts and loess deposits in Asia
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Figure 3.
Correlations of lithostratigraphy, magnetostratigraphy, and magnetic susceptibility (χ) records of the Chashmanigar and Karamaidan sections in southern Tajikistan, the Lingtai section on the Chinese Loess Plateau, and the benthic δ18O stack
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Figure 4.
Comparison of dust fluxes, properties, and periodicities between Tajikistan and Tarim Basin loess records
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Figure 5.
Temporal and spatial variations of eolian dust fluxes in Asia and the North Pacific over the past 3.6 Myr
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Figure 6.
Temporal variations of various paleoclimate proxies over the past 3.6 Myr
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Figure 7.
Conceptual model of the driving mechanisms of dust emission and transport in the Asian interior during geological intervals of global cooling
