气候变化领域集成服务门户(CCPortal): Soil organic carbon (SOC) enrichment in aeolian sediments and SOC loss by dust emission in the desert steppe, China

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DOI	10.1016/j.scitotenv.2021.149189
	Soil organic carbon (SOC) enrichment in aeolian sediments and SOC loss by dust emission in the desert steppe, China
	Du, Heqiang; Li, Sen; Webb, Nicholas P.; Zuo, Xiaoan; Liu, Xuyang
通讯作者	Du, HQ (通讯作者)，Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, Urat Desert Grassland Res Stn, Lanzhou 730000, Gansu, Peoples R China.
发表日期	2021
ISSN	0048-9697
EISSN	1879-1026
卷号	798
英文摘要	Dust emission is an important mechanism for carbon exchange between terrestrial and atmospheric carbon pools. However, undetermined soil organic carbon (SOC) enrichment in aeolian sediment limits the accurate estimation of SOC loss induced by wind erosion. Herein, we examined wind erosion and SOC loss measurements in the desert steppe of Inner Mongolia, China. By testing the particle size distributions (PSDs) and SOC contents across different particle size groups of the soil samples and aeolian sediments, we found that the finer soil particles generally had higher SOC contents. According to the measured results, we recognized that the mechanism of SOC enrichment in aeolian sediment is the inconstant distribution of SOC across the different soil particle size groups and the differences between the PSDs of soils and aeolian sediments. Based on the mechanism, we proposed a method to calculate the SOC content in aeolian sediment, and the calculated results are highly consistent with the measured results. Compared with the previous method, our calculation method provided a more precise result. Integrating our method for estimating SOC content in dust (diameter less than 50 mu m) and a dust emission model, we simulated the SOC loss induced by wind erosion in this region by a wind erosion model, and the results show SOC loss induced by dust emissions ranging from 0 to 39 g/m(2)/y during the period of 2001 to 2017. We believe the study method of dust SOC content calculation we proposed could be interested by the scholars in the field of carbon cycling, and the simulated results of SOC loss could provide robust data for the estimation of carbon budget in the desert steppe. (C) 2021 Elsevier B.V. All rights reserved.
关键词	WIND EROSION LAND DEGRADATION SIZE FRACTIONS WATER EROSION MATTER STABILIZATION DEPOSITION MODEL MECHANISMS STRATEGIES
英文关键词	Desert steppe; Dust emission; SOC content calculation; SOC loss; SOC enrichment mechanism
语种	英语
WOS研究方向	Environmental Sciences & Ecology
WOS类目	Environmental Sciences
WOS记录号	WOS:000701771500010
来源期刊	SCIENCE OF THE TOTAL ENVIRONMENT
来源机构	中国科学院西北生态环境资源研究院
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/254179
作者单位	[Du, Heqiang; Li, Sen; Liu, Xuyang] Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, Lanzhou 730000, Gansu, Peoples R China; [Du, Heqiang; Zuo, Xiaoan] Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, Urat Desert Grassland Res Stn, Lanzhou 730000, Gansu, Peoples R China; [Li, Sen; Liu, Xuyang] Univ Chinese Acad Sci, Beijing 100049, Peoples R China; [Webb, Nicholas P.] USDA ARS, Jornada Expt Range, Las Cruces, NM 88003 USA
推荐引用方式 GB/T 7714	Du, Heqiang,Li, Sen,Webb, Nicholas P.,et al. Soil organic carbon (SOC) enrichment in aeolian sediments and SOC loss by dust emission in the desert steppe, China[J]. 中国科学院西北生态环境资源研究院,2021,798.
APA	Du, Heqiang,Li, Sen,Webb, Nicholas P.,Zuo, Xiaoan,&Liu, Xuyang.(2021).Soil organic carbon (SOC) enrichment in aeolian sediments and SOC loss by dust emission in the desert steppe, China.SCIENCE OF THE TOTAL ENVIRONMENT,798.
MLA	Du, Heqiang,et al."Soil organic carbon (SOC) enrichment in aeolian sediments and SOC loss by dust emission in the desert steppe, China".SCIENCE OF THE TOTAL ENVIRONMENT 798(2021).