气候变化领域集成服务门户(CCPortal): Wet mid-late Holocene in central Asia supported prehistoric intercontinental cultural communication: Clues from pollen data

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DOI	10.1016/j.catena.2021.105852
	Wet mid-late Holocene in central Asia supported prehistoric intercontinental cultural communication: Clues from pollen data
	Tian, Fang; Wang, Wei; Rudaya, Natalia; Liu, Xingqi; Cao, Xianyong
通讯作者	Tian, F (通讯作者)
发表日期	2022
ISSN	0341-8162
EISSN	1872-6887
卷号	209
英文摘要	Past precipitation patterns in arid central Asia can help us to understand better the situation of the Eurasian steppe-road of prehistoric intercontinental culture communication. This requires reliable quantitative pollen-based reconstructions to reveal the spatiotemporal pattern of past precipitation (pollen is the most feasible proxy for quantitative reconstruction and spatial comparison). In this study, modern pollen data (n = 1336) from arid central Asian sites with a mean annual precipitation (P-ann) less than 400 mm were used to explore the influence of P-ann on modern pollen assemblages using canonical correlation analysis (CCA) and to create a pollen-P-ann calibration-set using Weighted-Averaging Partial Least Squares (WA-PLS) and Random Forest (RF). We then reconstructed past P-ann variations for 10 Holocene pollen spectra from north-western China and Mongolia. The reconstructions based on the two approaches were compared with short-term reconstructions and meteorological records (past 55 years) to assess their performance, with statistical significance testing of the reconstructions and assessment of analogue quality. Our results show that RF has a slightly better model performance than WAPLS, and is also a suitable approach for past climate reconstruction using pollen data. Lacustrine pollen spectra reflect the overall pattern of multi-year climate changes rather than interannual climate variations. P-ann reconstructions show that eastern arid central Asia had a relatively dry early Holocene (11.5-8 cal ka BP) and a stable humid mid-late Holocene (after 6 ka), which supported prehistoric intercontinental cultural communication.
关键词	CLIMATE CALIBRATION-SET ARID CENTRAL-ASIA QUANTITATIVE RECONSTRUCTIONS MOISTURE EVOLUTION CENTRAL MONGOLIA LAKE VEGETATION PALEOLIMNOLOGY XINJIANG PLATEAU
英文关键词	Arid central Asia; Pollen-climate transfer function; Climate reconstruction; Random forest; Model performance
语种	英语
WOS研究方向	Geology ; Agriculture ; Water Resources
WOS类目	Geosciences, Multidisciplinary ; Soil Science ; Water Resources
WOS记录号	WOS:000720775600019
来源期刊	CATENA
来源机构	中国科学院青藏高原研究所
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/260718
推荐引用方式 GB/T 7714	Tian, Fang,Wang, Wei,Rudaya, Natalia,et al. Wet mid-late Holocene in central Asia supported prehistoric intercontinental cultural communication: Clues from pollen data[J]. 中国科学院青藏高原研究所,2022,209.
APA	Tian, Fang,Wang, Wei,Rudaya, Natalia,Liu, Xingqi,&Cao, Xianyong.(2022).Wet mid-late Holocene in central Asia supported prehistoric intercontinental cultural communication: Clues from pollen data.CATENA,209.
MLA	Tian, Fang,et al."Wet mid-late Holocene in central Asia supported prehistoric intercontinental cultural communication: Clues from pollen data".CATENA 209(2022).