干旱区生态环境知识资源中心(Arid): A new hydrological climatic proxy in arid lake sediments: Iodine-uranium concentrations

Arid

DOI	10.1016/j.palaeo.2023.111409
	A new hydrological climatic proxy in arid lake sediments: Iodine-uranium concentrations
	Zhao, Xue; Hou, Xiaolin; Huang, Zhao; Zhang, Chengjun; Cheng, Peng
通讯作者	Hou, XL
来源期刊	PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
ISSN	0031-0182
EISSN	1872-616X
出版年	2023
卷号	613
英文摘要	Hydrological variation in the past similar to 2 kyr is important for understanding the impact and driving forces of climate changes in the present and future, especially in arid areas. Sediment is one of the most useful archives in such a time period, and selection and validation of qualified hydrological proxies is the key point for reconstruction of hydrology in the past centuries. However, such research still faces a challenge due to limited knowledge of physiochemical implications of the traditional proxies in the specific lake, and difficulties to discriminate dry-wet from warm-cold signals. Here, a sediment core collected from Keluke Lake, Qaidam Basin, Northwest China was analyzed for iodine and uranium concentrations, to explore their potential as a new hydrological proxy in the arid regions for reconstructing the dry-wet changes during the past similar to 2200 years. A significant correlation be-tween iodine and uranium concentrations (r = 0.62, P < 0.01) was observed in the sediment core, and four peak events of synchronously varied iodine and uranium concentrations occurred in the studied sediment core. This indicates similar physiochemical behaviors of the two elements from the catchment to the sediments via lake water. During drier periods, as vegetation degradation and soil organic substance content decreased, water-soluble iodine and uranium were intensively leached, and fine particle associated iodine and uranium were seriously eroded from catchment soils. Meanwhile, the suspended matter concentrations and organic substance content in lake water increased as well, which facilitated more iodine and uranium to be deposited and recorded in the sediment as peak events. The four dry events coincide with the reported climatic changes in other lake sediments, ice core and aeolian sediments, and also correspond with the society evolution in this area, including the establishment of Tuyuhun Kingdom (313-663 CE), Tubo Empire (618-842 CE), Mongolian tribes (1495-1591 CE, and the Han population immigration driven by a severe drought disaster in 1876-1879.
英文关键词	Iodine Uranium Lake sediment Qaidam Basin Climate change
类型	Article
语种	英语
开放获取类型	hybrid, Green Published
收录类别	SCI-E
WOS记录号	WOS:000989697500001
WOS关键词	ASIAN MONSOON ; I-129 ; SOIL ; SPECIATION ; SAMPLES ; RECORD ; CHINA ; XIAN
WOS类目	Geography, Physical ; Geosciences, Multidisciplinary ; Paleontology
WOS研究方向	Physical Geography ; Geology ; Paleontology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/397954
推荐引用方式 GB/T 7714	Zhao, Xue,Hou, Xiaolin,Huang, Zhao,et al. A new hydrological climatic proxy in arid lake sediments: Iodine-uranium concentrations[J],2023,613.
APA	Zhao, Xue,Hou, Xiaolin,Huang, Zhao,Zhang, Chengjun,&Cheng, Peng.(2023).A new hydrological climatic proxy in arid lake sediments: Iodine-uranium concentrations.PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY,613.
MLA	Zhao, Xue,et al."A new hydrological climatic proxy in arid lake sediments: Iodine-uranium concentrations".PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY 613(2023).