干旱区生态环境知识资源中心(Arid): Salinification and salt transports under aeolian processes in potential desertification regions of China

Arid

DOI	10.1016/j.scitotenv.2021.146832
	Salinification and salt transports under aeolian processes in potential desertification regions of China
	Wang, Xunming; Li, Xiaobin; Cai, Diwen; Lou, Junpeng; Li, Danfeng; Liu, Fa
通讯作者	Wang, XM (corresponding author), Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Water Cycle & Related Land Surface Proc, Beijing 100101, Peoples R China.
来源期刊	SCIENCE OF THE TOTAL ENVIRONMENT
ISSN	0048-9697
EISSN	1879-1026
出版年	2021
卷号	782
英文摘要	China has aeolian and salinization desertification, however, the role of salt transports by wind on salinization processes in potential desertification regions (PDR) is poorly understood. In this study, electrical conductivity of soil saturated extract (ECe), pH values of 1163 surface soil and aeolian transport samples acquired from nine PDRs and the effect of salt transports under aeolian processes on salinification was determined based on wind tunnel experiments. The results show that the maximum ECe values of the surface soils in PDRs such as Hulun Buir, Nunkiang, Horqin, Otindag, Ordos, Qinghai, and Junggar were less than 3 dS/m, and there was low salinization risk and the dominant desertification in these regions was aeolian desertification. Likewise, the ECe values of surface soils in the other regions such as the Ala Shan & Hexi Corridor and Tarim were 2.67 +/- 1.98 and 10.3 +/- 13.13 dS/m, respectively, which show nonsaline and saline soils existence and there is a risk of both aeolian desertification and salinization in PDRs. Annual precipitation is the key factor in salinization controlling in China's PDRs and soil accumulation easier occurred in regions with annual precipitation less than 70 mm due to inadequate leaching. In addition, the wind tunnel experiment results show that under aeolian processes the variability of ECe values of aeolian transports ranged between 2.56% and -15.68%, and the aeolian processes could lower the ECe values of surface soils in most regions. The variability of ECe of the aeolian transports under low free wind speed (14 m/s) and high free wind speed (22 m/s) ranged between -7.87% and 8.77%. Our results highlight that besides the variations in groundwater level, the aeolian processes may play a more important role in salt transports and have exerted potential effects on salinization processes in the region, which may improve decisions in a desertification combating. (c) 2021 Elsevier B.V. All rights reserved.
英文关键词	Aeolian desertification Salinization Aeolian processes Potential desertification region
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000655529600002
WOS关键词	SALINE-SODIC SOIL ; RECLAMATION ; PLATEAU ; DUST
WOS类目	Environmental Sciences
WOS研究方向	Environmental Sciences & Ecology
来源机构	中国科学院地理科学与资源研究所
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/351675
作者单位	[Wang, Xunming; Li, Xiaobin; Cai, Diwen; Lou, Junpeng; Li, Danfeng; Liu, Fa] Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Water Cycle & Related Land Surface Proc, Beijing 100101, Peoples R China; [Wang, Xunming] Univ Chinese Acad Sci, Coll Resources & Environm, Beijing 100190, Peoples R China
推荐引用方式 GB/T 7714	Wang, Xunming,Li, Xiaobin,Cai, Diwen,et al. Salinification and salt transports under aeolian processes in potential desertification regions of China[J]. 中国科学院地理科学与资源研究所,2021,782.
APA	Wang, Xunming,Li, Xiaobin,Cai, Diwen,Lou, Junpeng,Li, Danfeng,&Liu, Fa.(2021).Salinification and salt transports under aeolian processes in potential desertification regions of China.SCIENCE OF THE TOTAL ENVIRONMENT,782.
MLA	Wang, Xunming,et al."Salinification and salt transports under aeolian processes in potential desertification regions of China".SCIENCE OF THE TOTAL ENVIRONMENT 782(2021).