气候变化领域集成服务门户(CCPortal): Early Pleistocene (Olduvai Subchron) vegetation and climate change based on palynological records from the Yinchuan Basin of northwestern China

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DOI	10.1016/j.palaeo.2020.109893
	Early Pleistocene (Olduvai Subchron) vegetation and climate change based on palynological records from the Yinchuan Basin of northwestern China
	Tian Y.; Andreev A.A.; Zhou Z.; Wei M.; Wang J.; Lu L.; Chi C.
发表日期	2020
ISSN	0031-0182
卷号	556
英文摘要	Many recent studies focus on the relatively cold and humid interval during the Early Pleistocene Olduvai Subchron (1.95–1.77 Ma), but detailed environmental records for this interval are still rare. Here we present a high-resolution pollen record from the PL02 core (38°55′26.62″N, 106°36′3.82″E) from the Yinchuan Basin of northwestern China to reconstruct vegetation and infer climatic changes. Vegetation was dominated by desert steppe from 1.95 to 1.89 Ma suggesting a cold and dry climate. High percentages of Picea and Abies pollen indicate cold and humid conditions between 1.89 and 1.87 Ma while pollen percentages of broadleaved taxa increased rapidly between 1.87 and 1.84 Ma reflecting relatively warm and humid conditions. Palynological assemblages from 1.84 to 1.82 Ma reflect a colder and drier climate with an increase in xerophytic taxa and a decrease in conifers. Further increases of xerophytic taxa suggest a relatively cold and dry climate prevailed after 1.80 Ma. The new high-resolution palynological record suggests that environmental changes in the Yinchuan Basin are synchronous with global fluctuations. The inferred climate fluctuations show 20-kyr cycles during the Olduvai Subchron, supporting the view that climate changes in the study region were mainly controlled by orbital factors. © 2020 Elsevier B.V.
英文关键词	Climate changes; Olduvai Subchron; Pollen; Yinchuan Basin
语种	英语
scopus关键词	climate variation; coniferous tree; desert; dominance; fossil record; palynology; Pleistocene; pollen; reconstruction; steppe; vegetation dynamics; China; Ningxia Huizu; Yinchuan Basin; Abies; Coniferophyta; Picea
来源期刊	Palaeogeography, Palaeoclimatology, Palaeoecology
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/150381
作者单位	College of Resource Environment and Tourism, Capital Normal University, Beijing, 100048, China; Alfred Wegener Institute, Research Unit Potsdam, Telegrafenberg A43, Potsdam, 14473, Germany; Institute of Geology and Petroleum Technologies, Kazan Federal University, Kremlyovskaya 18, Kazan, 420008, Russian Federation
推荐引用方式 GB/T 7714	Tian Y.,Andreev A.A.,Zhou Z.,et al. Early Pleistocene (Olduvai Subchron) vegetation and climate change based on palynological records from the Yinchuan Basin of northwestern China[J],2020,556.
APA	Tian Y..,Andreev A.A..,Zhou Z..,Wei M..,Wang J..,...&Chi C..(2020).Early Pleistocene (Olduvai Subchron) vegetation and climate change based on palynological records from the Yinchuan Basin of northwestern China.Palaeogeography, Palaeoclimatology, Palaeoecology,556.
MLA	Tian Y.,et al."Early Pleistocene (Olduvai Subchron) vegetation and climate change based on palynological records from the Yinchuan Basin of northwestern China".Palaeogeography, Palaeoclimatology, Palaeoecology 556(2020).