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 > 黄土与第四纪地质国家重点实验室（2010~）

	Palaeoclimatic and hydrological environments inferred by moisture indexes from the S-4 palaeosol section in the Xi'an region, China
	Zhao, JB (Zhao, Jing-Bo)[ 1,2 ]; Ma, YD (Ma, Yan-Dong)[ 2,3 ]; Lui, R (Lui, Rui)[ 4 ]; Luo, XQ (Luo, Xiao-Qing)[ 1 ]; Shao, TJ (Shao, Tian-Jie)[ 1 ]
	2018-11-10
发表期刊	QUATERNARY INTERNATIONAL
卷号	493 页码:127-136
文章类型	期刊论文
摘要	We used indexes of soil moisture content to reconstruct water balance and vegetation type during the development of the palaeosol S4 of the loess-palaeosol sequence in the Xi'an area of China. Goethite–Fe-Mn concretions were found within S4 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 °C and annual average precipitation of 900–1000 mm during the development of S4. 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 ∼25%, after water consumption by evapotranspiration; and the soil moisture content within the goethite–Fe-Mn concretion layer was close to saturation, at ∼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	S4 palaeosol Goethite–Fe-Mn concretion Palaeo-moisture content indexes Palaeowater circulation Water balance
DOI	10.1016/j.quaint.2018.06.015
收录类别	SCI
语种	英语
引用统计	被引频次：3[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.ieecas.cn/handle/361006/9668
专题	黄土与第四纪地质国家重点实验室（2010~）
作者单位	1.School of Geography and Tourism, Shaanxi Normal University, Xi'an 710062, China; 2.State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of Sciences, Xi'an 710075, China; 3.Key Laboratory of Subsurface Hydrology and Ecological Effects in Arid Region (Chang'an University), Ministry of Education, Xi'an 710054, China; 4.Department of Basic, Engineering University of PAP, Xi'an 710076, China
推荐引用方式 GB/T 7714	Zhao, JB ,Ma, YD ,Lui, R ,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, JB ,Ma, YD ,Lui, R ,Luo, XQ ,&Shao, TJ .(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, JB ,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.