Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1016/j.aeolia.2013.04.003 |
Increasing Ca2+ deposition in the western US: The role of mineral aerosols | |
Brahney, J.1; Ballantyne, A. P.1; Sievers, C.2; Neff, J. C.1 | |
通讯作者 | Brahney, J. |
来源期刊 | AEOLIAN RESEARCH
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ISSN | 1875-9637 |
EISSN | 2212-1684 |
出版年 | 2013 |
卷号 | 10页码:77-87 |
英文摘要 | Considerable research has focused on the role of industrial emissions in controlling the acidity of precipitation; however, much less research has focused on the role of mineral aerosols emitted from soils. According to data published by the National Atmospheric Deposition Network (NADP), over the past 17 years Ca2+ deposition has increased over large regions of the US. A trend analysis to determine regions of significant change in Ca2+ deposition revealed statistically significant increases in three broad regions within the western half of the country: the inter-mountain west, the midwest, and the northwest. We evaluated potential changes in sources of calcium to the atmosphere including soil erosion, industrial emissions, forest fires, and sea-salt aerosols to determine the cause of rising atmospheric calcium deposition. Based on our evaluation, the most parsimonious explanation for increased Ca2+ deposition is an increase in mineral aerosol emissions from within the western US. This explanation is corroborated by independent evidence showing increases in the frequency of dust storms and low-visibility days across regions of the western US. Furthermore, our analysis indicates that the increase in mineral aerosol emissions is most likely due to (1) increased aridity and wind transport and (2) increased area and intensity of upwind human activities. Changes in atmospheric dust concentrations can have important ecological implications through the contribution of acid neutralizing capacity to both precipitation and regions of deposition. Thus increased dust emissions have the potential to ameliorate the detrimental effects of acid precipitation on terrestrial ecosystems, though dust may exacerbate the impacts of air quality on human health. (c) 2013 Elsevier B.V. All rights reserved. |
英文关键词 | Dust Precipitation Alkalinity Land-use Wind Calcium |
类型 | Article |
语种 | 英语 |
国家 | USA |
收录类别 | SCI-E |
WOS记录号 | WOS:000322351900009 |
WOS关键词 | UNITED-STATES ; WIND EROSION ; DUST DEPOSITION ; ACID-RAIN ; SOUTHERN NEVADA ; MOJAVE DESERT ; AEOLIAN DUST ; EOLIAN DUST ; CHEMISTRY ; CLIMATE |
WOS类目 | Geography, Physical |
WOS研究方向 | Physical Geography |
资源类型 | 期刊论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/175507 |
作者单位 | 1.Univ Colorado, Dept Geol Sci, Boulder, CO 80309 USA; 2.Univ Colorado, Dept Phys, Boulder, CO 80309 USA |
推荐引用方式 GB/T 7714 | Brahney, J.,Ballantyne, A. P.,Sievers, C.,et al. Increasing Ca2+ deposition in the western US: The role of mineral aerosols[J],2013,10:77-87. |
APA | Brahney, J.,Ballantyne, A. P.,Sievers, C.,&Neff, J. C..(2013).Increasing Ca2+ deposition in the western US: The role of mineral aerosols.AEOLIAN RESEARCH,10,77-87. |
MLA | Brahney, J.,et al."Increasing Ca2+ deposition in the western US: The role of mineral aerosols".AEOLIAN RESEARCH 10(2013):77-87. |
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