A multi-proxy late Holocene climate record from aeolian deposits of the Horqin sandy land, northeast China and its societal implications

摘要: Abstract Late Holocene climate change is an important issue in global research, because of its close relationship with human societal development. The Horqin sandy land area for early dryland agriculture However, the role that climatic factors, especially temperature and precipitation, played regional development still unclear. This paper presents a high-resolution multi-proxy palaeomoisture record spanning 4300–1000 cal. yr BP derived from sequential aeolian sediments Liuhutun section on northeastern frontier land, northeast China. 2.96 m section, chronology based seven radiocarbon dates, was analyzed sediment grain-size, CaCO3 content, organic matter content environmental magnetic parameters. results indicate 4300–3800 cal. humid period drying trend; 3800–1700 cal. generally dry; 1700–1000 cal. sub-humid. It clear responsive to East Asian monsoonal circulation driven by variations Northern Hemisphere summer insolation. We further investigate between comparing moisture records subsistence strategy changes inferred previous studies. suggest high moderate precipitation may have facilitated agricultural during Lower Xiajiadian (ca. 4000–3400 yr BP). Owing drought-tolerant thermophilic phenological properties millets, which are major crops China, more than precipitation.