Palaeoclimatic and hydrological environments inferred by moisture indexes from the S-4 palaeosol section in the Xi'an region, China

doi:10.1016/j.quaint.2018.06.015

IEECAS OpenIR

	Palaeoclimatic and hydrological environments inferred by moisture indexes from the S-4 palaeosol section in the Xi'an region, China
	Zhao, Jing-Bo 1,2; Ma, Yan-Dong 2,3; Lui, Rui 4; Luo, Xiao-Qing 1; Shao, Tian-Jie 1
通讯作者	Ma, Yan-Dong(mayandongemail@snnu.edu.cn)
	2018-11-10
发表期刊	QUATERNARY INTERNATIONAL
ISSN	1040-6182
卷号	493 页码:127-136
摘要	We used indexes of soil moisture content to reconstruct water balance and vegetation type during the development of the palaeosol S-4 of the loess-palaeosol sequence in the Xi'an area of China. Goethite-Fe-Mn concretions were found within S-4 from field survey and laboratory analyses, and their presence is used as an indicator of soil moisture content and the depth distribution of groundwater. From a comparison of the goethite-Fe-Mn concretions, weathered-leached loess layer, and the vertical migration distance of CaCO3 between various sections in the Xi'an region, we infer a subtropical climate with annual average temperature 15-16 degrees C and annual average precipitation of 900-1000 mm during the development of S-4. At that time, unlike today, the Qinling Mountains were not the boundary between subtropical and temperate climatic regions. Our results show that the depth distribution of soil gravitational water in the Xi'an region reached 3.3 m; the average soil moisture content within the 0-3.3 m depth range was similar to 25%, after water consumption by evapotranspiration; and the soil moisture content within the goethite-Fe-Mn concretion layer was close to saturation, at similar to 48%. Soil moisture was abundant and the water balance was positive and a large amount of moisture was supplied to the groundwater each year, which was conducive for the development of forest vegetation.
关键词	S-4 palaeosol Goethite-Fe-Mn concretion Palaeo-moisture content indexes Palaeowater circulation Water balance
DOI	10.1016/j.quaint.2018.06.015
关键词[WOS]	LOESS PLATEAU ; MAGNETIC-SUSCEPTIBILITY ; NORTH-ATLANTIC ; NEW-ZEALAND ; SEQUENCE ; LUOCHUAN ; DEPOSITS ; BASIN ; IRON
收录类别	SCI ; SCI
语种	英语
资助项目	Project of National Natural Science Foundation of China[41210002] ; Project of Xi'an Geological Survey Center of China Geological Survey[[2016]4] ; Project of State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of Sciences[SKLLQG1626] ; Project of State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of Sciences[SKLLQG1713]
WOS研究方向	Physical Geography ; Geology
项目资助者	Project of National Natural Science Foundation of China ; Project of Xi'an Geological Survey Center of China Geological Survey ; Project of State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of Sciences
WOS类目	Geography, Physical ; Geosciences, Multidisciplinary
WOS记录号	WOS:000447489200013
出版者	PERGAMON-ELSEVIER SCIENCE LTD
引用统计
文献类型	期刊论文
条目标识符	http://ir.ieecas.cn/handle/361006/14687
通讯作者	Ma, Yan-Dong
作者单位	1.Shaanxi Normal Univ, Sch Geog & Tourism, Xian 710062, Shaanxi, Peoples R China 2.Chinese Acad Sci, Inst Earth Environm, State Key Lab Loess & Quaternary Geol, Xian 710075, Shaanxi, Peoples R China 3.Changan Univ, Minist Educ, Key Lab Subsurface Hydrol & Ecol Effects Arid Reg, Xian 710054, Shaanxi, Peoples R China 4.Engn Univ PAP, Dept Basic, Xian 710076, Shaanxi, Peoples R China
推荐引用方式 GB/T 7714	Zhao, Jing-Bo,Ma, Yan-Dong,Lui, Rui,et al. Palaeoclimatic and hydrological environments inferred by moisture indexes from the S-4 palaeosol section in the Xi'an region, China[J]. QUATERNARY INTERNATIONAL,2018,493:127-136.
APA	Zhao, Jing-Bo,Ma, Yan-Dong,Lui, Rui,Luo, Xiao-Qing,&Shao, Tian-Jie.(2018).Palaeoclimatic and hydrological environments inferred by moisture indexes from the S-4 palaeosol section in the Xi'an region, China.QUATERNARY INTERNATIONAL,493,127-136.
MLA	Zhao, Jing-Bo,et al."Palaeoclimatic and hydrological environments inferred by moisture indexes from the S-4 palaeosol section in the Xi'an region, China".QUATERNARY INTERNATIONAL 493(2018):127-136.