干旱区生态环境知识资源中心(Arid): Moisture changes over the past 467 years in the central Hexi Corridor, northwestern China

Arid

DOI	10.1016/j.dendro.2020.125725
	Moisture changes over the past 467 years in the central Hexi Corridor, northwestern China
	Qie, Jiazhi; Tian, Qinhua; Zhang, Yong
通讯作者	Zhang, Y (corresponding author), Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Land Surface Pattern & Simulat, Beijing 100101, Peoples R China.
会议名称	International Conference on Tree Rings in Archaeology, Climatology and Ecology (TRACE)
会议日期	MAY 08-11, 2019
会议地点	Caserta, ITALY
英文摘要	The long-term characteristics of precipitation in arid and semi-arid areas are of great interest because these areas are very sensitive to climate change and human activities. The Hexi Corridor is an arid and semi-arid region in northwestern China that also is an important sector of the Silk Road Economic Belt; despite the region's dependence on precipitation, annually resolved, long-term moisture records are still lacking for this region. Here, a standard tree-ring width chronology spanning 1484-2015 AD is developed for the Hexi Corridor using Qilian juniper (S. przewalskii Kom.). The chronology is used to reconstruct moisture changes in the region over the past 467 years. Correlation analyses indicate that the tree-ring width index has a significant positive correlation with the June SPEI (standardized precipitation evapotranspiration index) on a twelve-month time scale (r = 0.73, n = 65, p < 0.001). We used this information to build a transfer function that explains 52.5% of the variance in the SPEI reconstructed for the period from 1549 CE to 2015 CE. Our study area experienced clear alternations between dry and wet periods. Especially long wet periods include 1600-1650 AD and 1762-1804 AD; long dry periods include 1670-1693 AD, 1917-1970 AD, and 1990-2015 AD. The 1920s was the most severe period of drought in the last 467 years. The results of wavelet analysis and running correlation analysis indicate that the atmospheric circulation system experienced a notable shift around the 1800s, after which point the role of the westerly system grew more pronounced.
英文关键词	Hexi Corridor Qilian juniper Tree-ring width Dry-wet reconstruction
来源出版物	DENDROCHRONOLOGIA
ISSN	1125-7865
EISSN	1612-0051
出版年	2020
卷号	63
出版者	ELSEVIER GMBH
类型	Article; Proceedings Paper
语种	英语
收录类别	CPCI-S
WOS记录号	WOS:000579857600010
WOS关键词	RING-BASED RECONSTRUCTION ; ANNUAL PRECIPITATION ; CLIMATE VARIABILITY ; QILIAN MOUNTAINS ; TIBETAN PLATEAU ; INNER-MONGOLIA ; DROUGHT ; DENDROCLIMATOLOGY ; RUNOFF ; RECORD
WOS类目	Forestry ; Geography, Physical
WOS研究方向	Forestry ; Physical Geography
资源类型	会议论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/337080
作者单位	[Qie, Jiazhi; Zhang, Yong] Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Land Surface Pattern & Simulat, Beijing 100101, Peoples R China; [Qie, Jiazhi] Univ Chinese Acad Sci, Beijing 100049, Peoples R China; [Tian, Qinhua] China Meteorol Adm, Lab Climate Studies, Natl Climate Ctr, Beijing 100081, Peoples R China
推荐引用方式 GB/T 7714	Qie, Jiazhi,Tian, Qinhua,Zhang, Yong. Moisture changes over the past 467 years in the central Hexi Corridor, northwestern China[C]:ELSEVIER GMBH,2020.