Salinification and salt transports under aeolian processes in potential desertification regions of China
文献类型：期刊论文
| 作者 | Wang, Xunming1,2; Li, Xiaobin1; Cai, Diwen1; Lou, Junpeng1; Li, Danfeng1; Liu, Fa1 |
| 刊名 | SCIENCE OF THE TOTAL ENVIRONMENT
 |
| 出版日期 | 2021-08-15 |
| 卷号 | 782页码:8 |
| ISSN号 | 0048-9697 |
| 关键词 | Aeolian desertification Salinization Aeolian processes Potential desertification region |
| DOI | 10.1016/j.scitotenv.2021.146832 |
| 通讯作者 | Wang, Xunming(xunming@igsnrr.ac.cn) |
| 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 & minus;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 & minus;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. |
| WOS关键词 | SALINE-SODIC SOIL ; RECLAMATION ; PLATEAU ; DUST |
| 资助项目 | Second Tibetan Plateau Scientific Expedition and Research[2019QZKK0305] ; National Natural Science Foundation of China[41930640] ; National Natural Science Foundation of China[41771012] ; National Key Research and Development Program of China[2016YFA0601900] ; Key Frontier Program of Chinese Academy of Sciences[QYZDJ-SSW-DQC043] |
| WOS研究方向 | Environmental Sciences & Ecology |
| 语种 | 英语 |
| 出版者 | ELSEVIER |
| WOS记录号 | WOS:000655529600002 |
| 资助机构 | Second Tibetan Plateau Scientific Expedition and Research ; National Natural Science Foundation of China ; National Key Research and Development Program of China ; Key Frontier Program of Chinese Academy of Sciences |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/163971]  |
| 专题 | 中国科学院地理科学与资源研究所 |
| 通讯作者 | Wang, Xunming |
| 作者单位 | 1.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Water Cycle & Related Land Surface Proc, Beijing 100101, Peoples R China 2.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]. SCIENCE OF THE TOTAL ENVIRONMENT,2021,782:8. |
| 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,782,8. |
| 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):8. |
入库方式： OAI收割
来源：地理科学与资源研究所
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