干旱区生态环境知识资源中心(Arid): Is Dust Derived From Shrinking Saline Lakes a Risk to Soil Sodification in Southern South America?

Arid

DOI	10.1029/2021JF006585
	Is Dust Derived From Shrinking Saline Lakes a Risk to Soil Sodification in Southern South America?
	Borda, L. G.; Cosentino, N. J.; Iturri, L. A.; Garcia, M. G.; Gaiero, D. M.
通讯作者	Borda, LG
来源期刊	JOURNAL OF GEOPHYSICAL RESEARCH-EARTH SURFACE
ISSN	2169-9003
EISSN	2169-9011
出版年	2022
卷号	127 期号:4
英文摘要	Dry lakebeds exposed by shrinking water bodies in arid regions constitute sodium (Na)-rich mineral dust emission hotspots that may potentially affect agriculture through soil sodification. However, no soluble Na mass balance has so far been attempted. We modeled 13 years (2005-2017) of dust emission from Mar Chiquita (MC), the most extensive shrinking saline lake in South America. Based on a chemical characterization of dust, we found that a mean similar to 15-150 mg m(-2) of soluble Na was deposited 300 km from the source during the season of strongest dust emissions. We estimated the impact of this atmospheric input on 13 agricultural soils, with different rainfall regimes and water holding capacities. At most sites, dust-equilibrated infiltrated rainfall water had a Na concentration 8-7,000 times lower than the lowest concentration threshold proposed to trigger sodification. Additionally, this rainfall water is diluted similar to 2-20 times as it infiltrates in saturated soils, and its sodium adsorption ratio is probably reduced due to the abundance of soluble calcium and magnesium in the soil solution. Thus, there is no risk of short-term, seasonal sodification, except possibly at two sites and in close proximity to the dust source (<50 km), where dust deposition is maximum. At these sites, we estimated potential dust-related rises in the proportion of soil exchangeable Na. Under scenarios of enhanced salt-rich dust emissions from shrinking lakes in the twenty-first century, agricultural soils close to salt-rich dust sources worldwide should be monitored for potential Na enrichment related to Na-rich dust.
英文关键词	soil sodification dust Mar Chiquita saline lake South America shrinking lake
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000777492400001
WOS关键词	EOLIAN TRANSPORT ; LOESS SOILS ; WIND-TUNNEL ; SALTON-SEA ; FIELD ; DYNAMICS ; CLIMATE ; DESERT ; ACIDIFICATION ; VARIABILITY
WOS类目	Geosciences, Multidisciplinary
WOS研究方向	Geology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/393464
推荐引用方式 GB/T 7714	Borda, L. G.,Cosentino, N. J.,Iturri, L. A.,et al. Is Dust Derived From Shrinking Saline Lakes a Risk to Soil Sodification in Southern South America?[J],2022,127(4).
APA	Borda, L. G.,Cosentino, N. J.,Iturri, L. A.,Garcia, M. G.,&Gaiero, D. M..(2022).Is Dust Derived From Shrinking Saline Lakes a Risk to Soil Sodification in Southern South America?.JOURNAL OF GEOPHYSICAL RESEARCH-EARTH SURFACE,127(4).
MLA	Borda, L. G.,et al."Is Dust Derived From Shrinking Saline Lakes a Risk to Soil Sodification in Southern South America?".JOURNAL OF GEOPHYSICAL RESEARCH-EARTH SURFACE 127.4(2022).