干旱区生态环境知识资源中心(Arid): National-scale distribution and its influence factors of calcium concentrations in Chinese soils from the China Global Baselines project

Arid

DOI	10.1016/j.gexplo.2021.106907
	National-scale distribution and its influence factors of calcium concentrations in Chinese soils from the China Global Baselines project
	Wang, Xueqiu; Liu, Xuemin; Wang, Wei
通讯作者	Liu, XM (corresponding author), Chengdu Univ Technol, Dongshan Rd, Chengdu 610059, Peoples R China.
来源期刊	JOURNAL OF GEOCHEMICAL EXPLORATION
ISSN	0375-6742
EISSN	1879-1689
出版年	2022
卷号	233
英文摘要	The China Geochemical Baselines (CGB) project provides geochemical baselines for nearly all chemical elements, including Ca, by sampling transported soils at a density of 1 sample per approximately 3000 km2 across nearly all of China. A total of 3382 top samples (TS) were collected at depths of 0-25 cm and 3380 deep samples (DS) at depths 100 cm. The median (background) values of Ca in the TS and DS were 1.96% and 1.84%, respectively. On the spatial distribution maps, Ca concentrations generally decreased from northwestern to southeastern China. The natural climate, especially the aridity/humidity status, primarily influences this national-scale distribution. The median Ca values were ranked as follows: arid (4.61% in the TS and 4.15% in the DS) > semi-arid (2.73% in the TS and 2.55% in the DS) > sub-humid (1.37% in the TS and DS) > humid (0.56% in the TS and 0.52% in the DS) areas. In the arid areas of northwestern China, evaporite minerals can be deposited in soils, resulting in a regional high-Ca background. In the humid regions of southeastern China, soil water readily leaches Ca, leading to a regional low-Ca background. The highest Ca concentrations sparsely distributed in northwestern China (>90% quantile, Q90) and the higher Ca contents in the semi-arid and sub-humid areas (Q75-Q90) are linked to the parent Ca-bearing rocks. While no high Ca concentrations exist in both the TS and DS in southeastern China, although carbonate rocks are widely distributed. The lowest Ca concentrations distributed in southeastern China (
英文关键词	China Geochemical Baselines Calcium Transported soils Climate Acid rain
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000722317700002
WOS关键词	CHEMICAL-COMPOSITION ; CONTINENTAL-CRUST ; IGNEOUS ROCKS ; HUMAN HEALTH ; ACID-RAIN ; SEDIMENTS ; ELEMENTS ; SURFACE
WOS类目	Geochemistry & Geophysics
WOS研究方向	Geochemistry & Geophysics
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/374533
作者单位	[Wang, Xueqiu; Wang, Wei] Chinese Acad Geol Sci, Inst Geophys & Geochem Explorat IGGE, Key Lab Geochem Explorat, Langfang 065000, Peoples R China; [Wang, Xueqiu; Liu, Xuemin; Wang, Wei] UNESCO Int Ctr Global Scale Geochem ICGG, Langfang 065000, Peoples R China; [Liu, Xuemin] Chengdu Univ Technol, Appl Nucl Tech Geosci Key Lab Sichuan Prov, Chengdu 610059, Peoples R China
推荐引用方式 GB/T 7714	Wang, Xueqiu,Liu, Xuemin,Wang, Wei. National-scale distribution and its influence factors of calcium concentrations in Chinese soils from the China Global Baselines project[J],2022,233.
APA	Wang, Xueqiu,Liu, Xuemin,&Wang, Wei.(2022).National-scale distribution and its influence factors of calcium concentrations in Chinese soils from the China Global Baselines project.JOURNAL OF GEOCHEMICAL EXPLORATION,233.
MLA	Wang, Xueqiu,et al."National-scale distribution and its influence factors of calcium concentrations in Chinese soils from the China Global Baselines project".JOURNAL OF GEOCHEMICAL EXPLORATION 233(2022).