气候变化领域集成服务门户(CCPortal): Fine dust emissions from active sands at coastal Oceano Dunes; California

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DOI	10.5194/acp-19-2947-2019
	Fine dust emissions from active sands at coastal Oceano Dunes; California
	Huang Y.; Kok J.F.; Martin R.L.; Swet N.; Katra I.; Gill T.E.; Reynolds R.L.; Freire L.S.
发表日期	2019
ISSN	16807316
起始页码	2947
结束页码	2964
卷号	19 期号:5
英文摘要	Sand dunes and other active sands generally have a low content of fine grains and, therefore, are not considered to be major dust sources in current climate models. However, recent remote sensing studies have indicated that a surprisingly large fraction of dust storms are generated from regions covered by sand dunes, leading these studies to propose that sand dunes might be globally relevant sources of dust. To help understand dust emissions from sand dunes and other active sands, we present in situ field measurements of dust emission under natural saltation from a coastal sand sheet at Oceano Dunes in California. We find that saltation drives dust emissions from this setting that are on the low end of the range in emissions produced by non-sandy soils for similar wind speed. Laboratory analyses of sand samples suggest that these emissions are produced by aeolian abrasion of feldspars and removal of clay-mineral coatings on sand grain surfaces. We further find that this emitted dust is substantially finer than dust emitted from non-sandy soils, which could enhance its downwind impacts on human health, the hydrological cycle, and climate. © 2019 Author(s).
语种	英语
scopus关键词	abrasion; clay mineral; climate modeling; coastal zone; dune; dust storm; emission; laboratory method; remote sensing; saltation; California; United States
来源期刊	Atmospheric Chemistry and Physics
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/144590
作者单位	Department of Atmospheric and Oceanic Sciences, University of California, Los Angeles, CA 90095, United States; Department of Geography and Environmental Development, Ben Gurion University of the Negev, Be'er-Sheva, 84105, Israel; Department of Geological Sciences, University of Texas at El Paso, El Paso, TX 79968, United States; Department of Earth Sciences, University of Minnesota, Minneapolis, MN 55455, United States; Graduate Program in Environmental Engineering, Federal University of Paraná, Curitiba, PR, 80060, Brazil
推荐引用方式 GB/T 7714	Huang Y.,Kok J.F.,Martin R.L.,et al. Fine dust emissions from active sands at coastal Oceano Dunes; California[J],2019,19(5).
APA	Huang Y..,Kok J.F..,Martin R.L..,Swet N..,Katra I..,...&Freire L.S..(2019).Fine dust emissions from active sands at coastal Oceano Dunes; California.Atmospheric Chemistry and Physics,19(5).
MLA	Huang Y.,et al."Fine dust emissions from active sands at coastal Oceano Dunes; California".Atmospheric Chemistry and Physics 19.5(2019).