干旱区生态环境知识资源中心(Arid): Pollen Record of Humidity Changes in the Arid Western Qilian Mountains Over the Past 300 Years and Comparison With Tree-Ring Reconstructions

Arid

DOI	10.3389/feart.2020.562426
	Pollen Record of Humidity Changes in the Arid Western Qilian Mountains Over the Past 300 Years and Comparison With Tree-Ring Reconstructions
	Wang, Jiale; Huang, Xiaozhong; Zhang, Jun; Xiang, Lixiong; Xiao, Yulin; Fontana, Luciane; Ren, Xiuxiu; Wang, Zongli
通讯作者	Huang, XZ ; Wang, ZL
来源期刊	FRONTIERS IN EARTH SCIENCE
EISSN	2296-6463
出版年	2020
卷号	8
英文摘要	In arid central Asia, the geo-ecological environment of the well-vegetated high mountains differs from that of the extensive arid Gobi desert areas, with the forested areas having experienced a different pattern of humidity variations compared to the dryland regions. Therefore, the moisture history of the forest areas reconstructed by tree rings may differ from that of the dryland areas. In the extremely arid area of the western Qilian Mountains and the surrounding dryland areas, where forest is absent, it is unclear how humidity conditions have changed over the past several centuries. Here, we use a pollen record from Tian'E Lake, with a chronology based on(210)Pb and(137)Cs, and with an average temporal resolution of similar to 2 years, to reconstruct the humidity changes over the past 300 years. The results show that the pollen assemblage is dominated byArtemisiaand Amaranthaceae (=Chenopodiaceae), and therefore, the A/C (Artemisia/Chenopodiaceae) ratio can be used to reconstruct changes in humidity conditions. Based on the pollen A/C ratio, two relatively wet periods are identified: similar to 1740-1750 and 1840-1980, and two dry intervals: similar to 1750-1840 and 1980-2018. This pattern of variation is similar to that reconstructed from nearby humidity records based on tree-ring width adjacent to the Tian'E Lake area and with instrumental records from meteorological stations over the past several decades. However, there are significantly different records between pollen-based and tree-ring based humidity during similar to 1760-1830, 1880-1910, and 1920-2018 in the Qilian Mountains on long timescales. We conclude that pollen-based humidity records from dryland areas may differ from those reconstructed from tree-ring widths in forested mountain areas, especially when the temperature was increasing. It was further suggested that there was an antiphased relationship in humidity conditions between westerlies-dominated central Asia and monsoon areas over the past century.
英文关键词	western Qilian Mountains A C ratio tree rings global warming humidity changes
类型	Article
语种	英语
开放获取类型	gold
收录类别	SCI-E
WOS记录号	WOS:000574267800001
WOS关键词	CLIMATE-CHANGE ; CENTRAL-ASIA ; QAIDAM BASIN ; BOSTEN LAKE ; MOISTURE ; CHINA ; VARIABILITY ; VEGETATION ; PATTERNS
WOS类目	Geosciences, Multidisciplinary
WOS研究方向	Geology
来源机构	兰州大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/326588
作者单位	[Wang, Jiale; Huang, Xiaozhong; Zhang, Jun; Xiang, Lixiong; Xiao, Yulin; Ren, Xiuxiu; Wang, Zongli] Lanzhou Univ, Coll Earth & Environm Sci, Key Lab Western Chinas Environm Syst, Minist Educ, Lanzhou, Peoples R China; [Fontana, Luciane] Univ Fed ABC, Dept Engn Modeling & Appl Social Sci, Sao Paulo, Brazil
推荐引用方式 GB/T 7714	Wang, Jiale,Huang, Xiaozhong,Zhang, Jun,et al. Pollen Record of Humidity Changes in the Arid Western Qilian Mountains Over the Past 300 Years and Comparison With Tree-Ring Reconstructions[J]. 兰州大学,2020,8.
APA	Wang, Jiale.,Huang, Xiaozhong.,Zhang, Jun.,Xiang, Lixiong.,Xiao, Yulin.,...&Wang, Zongli.(2020).Pollen Record of Humidity Changes in the Arid Western Qilian Mountains Over the Past 300 Years and Comparison With Tree-Ring Reconstructions.FRONTIERS IN EARTH SCIENCE,8.
MLA	Wang, Jiale,et al."Pollen Record of Humidity Changes in the Arid Western Qilian Mountains Over the Past 300 Years and Comparison With Tree-Ring Reconstructions".FRONTIERS IN EARTH SCIENCE 8(2020).