Holocene Aeolian Variability in Central Asia Inferred from Grain-Size End-Member Modeling of Sayram Lake Sediments

Datos Bibliográficos

ID15801869
AutoresShuang Yang (0000-0002-6897-3701, Nantong University), Yuchen Xu (0000-0002-0686-4286, Nantong University), Longjuan Cheng (0000-0002-4502-3770, Nantong University), Dongliang Ning (0000-0003-1393-1165, Nantong University), Dejun Wan (0000-0002-6652-1787, Nantong University), Qingfeng Jiang (0000-0003-3518-4279, Nantong University, autor de correspondencia)
Año2026
Volumen9
Número2
Páginas30-30
Fecha de publicación2026-04-08
Peer ReviewedSí
Open AccessSí
TipoARTICLE
RevistaQuaternary (JOURNAL)
Identificadores de la revistaISSN: 2571-550X • E-ISSN: 2571-550X
EditorialMultidisciplinary Digital Publishing Institute (PUBLISHER • CH)
DOI10.3390/quat9020030
OpenAlexW7152111707
IdiomaEN
Referencias citadas103

Arid Central Asia (ACA) is a major source of atmospheric dust in the Northern Hemisphere; however, the evolutionary models and driving mechanisms of Holocene aeolian activity in this region remain debated. Based on 13 reliable AMS 14C dates from the Sayram Lake SLM2009 sediment core, this study reconstructs the Holocene sequence in aeolian activity through end-member modeling analysis (EMMA). It evaluates its relationship with regional atmospheric circulation. Four end-members were identified from base to top: EM1, with a modal grain size of 7.58 μm, represents low-energy suspension deposition; EM2 (26.30 μm) reflects lacustrine hydrodynamic processes; while EM3 (52.48 μm) and EM4 (416.86 μm) serve as proxies for regional aeolian activity. The results indicate that aeolian activity was relatively strong during the early Holocene (reaching peaks at 11.7–11.2 and 9.2–8.1 cal ka BP), significantly intensified during the mid-Holocene (7.3–5.3 cal ka BP), and gradually weakened in the late Holocene (since 4.0 cal ka BP). Comparison of the aeolian record from Lake Sayram with Greenland ice cores, North Atlantic ice-rafted debris events, and the GISP2 K+ record indicates that variations in aeolian activity in arid Central Asia are closely linked to the Northern Hemisphere climate system. We propose that these variations were primarily modulated by large-scale atmospheric circulation, driven by the synergistic interaction between the Siberian High and the mid-latitude westerlies

Aeolian processes · Arid · Climate change · Holocene · Holocene climatic optimum · Ice core · Northern Hemisphere · Sediment · Aeolian processes and effects · Atmospheric aerosols and clouds · Geology and Paleoclimatology Research