干旱区生态环境知识资源中心(Arid): Holocene pollen record from Lake Gahai, NE Tibetan Plateau and its implications for quantitative reconstruction of regional precipitation

Arid

DOI	10.1016/j.quascirev.2024.108504
	Holocene pollen record from Lake Gahai, NE Tibetan Plateau and its implications for quantitative reconstruction of regional precipitation
	Zhou, Shan; Zhang, Jiawu; Cheng, Bo; Zhu, Hainan; Lin, Jinxiu
通讯作者	Zhang, JW
来源期刊	QUATERNARY SCIENCE REVIEWS
ISSN	0277-3791
EISSN	1873-457X
出版年	2024
卷号	326
英文摘要	Located in the northwestern edge of the modern Asian summer monsoon (ASM), the northeastern Tibetan Plateau (NETP) is sensitive to changes of the ASM climate. However, variations of climate and vegetation during the Holocene remain unclear in this marginal region of the monsoon climate. Here we present a Holocene highresolution pollen record from Lake Gahai in the NETP since 11.4 (+/- 0.3) ka BP to reconstruct regional vegetation history. A quantitative reconstruction of precipitation is also tried using fossil pollen assemblages. Results suggested that before 10.2 (+/- 0.4) ka BP in the early Holocene, the vegetation cover was low and the climate was arid. A relatively wet climate indicated by high A/C ratio values occurred between 10.2 (+/- 0.4) and 7.4 (+/- 0.2) ka BP. After 7.4 (+/- 0.2) ka BP, the A/C ratio decreased, indicating that the climate was getting drier. The overall environment of the basin has become similar to modern conditions since 5.4 (+/- 0.1) ka BP. The reconstructed precipitation is not comparable with the tree-ring-based reconstruction from the Delingha region, although the reconstruction processes passed significance tests statistically. In addition to abundant surface pollen data and gradually improved quantitative reconstruction techniques, other factors such as the environmental settings and vegetation dynamics also affect the reliability of the pollen-based quantitative reconstruction of regional precipitation. Therefore, the applicability of pollen data for quantitative precipitation reconstruction in arid regions should be assessed and the results should be treated cautiously.
英文关键词	Holocene Pollen Lake sediments Qaidam Basin Precipitation reconstruction
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:001168333500001
WOS关键词	CLIMATE CALIBRATION-SET ; QAIDAM BASIN ; SURFACE POLLEN ; GONGHE BASIN ; QINGHAI LAKE ; HURLEG LAKE ; VEGETATION HISTORY ; DESERT VEGETATION ; AEOLIAN SEDIMENTS ; HIGH-RESOLUTION
WOS类目	Geography, Physical ; Geosciences, Multidisciplinary
WOS研究方向	Physical Geography ; Geology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/405248
推荐引用方式 GB/T 7714	Zhou, Shan,Zhang, Jiawu,Cheng, Bo,et al. Holocene pollen record from Lake Gahai, NE Tibetan Plateau and its implications for quantitative reconstruction of regional precipitation[J],2024,326.
APA	Zhou, Shan,Zhang, Jiawu,Cheng, Bo,Zhu, Hainan,&Lin, Jinxiu.(2024).Holocene pollen record from Lake Gahai, NE Tibetan Plateau and its implications for quantitative reconstruction of regional precipitation.QUATERNARY SCIENCE REVIEWS,326.
MLA	Zhou, Shan,et al."Holocene pollen record from Lake Gahai, NE Tibetan Plateau and its implications for quantitative reconstruction of regional precipitation".QUATERNARY SCIENCE REVIEWS 326(2024).