Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1016/j.catena.2013.06.017 |
Sources of PM2.5 impacting on Gran Canaria, Spain | |
Engelbrecht, Johann P.1; Menendez, Inmaculada2; Derbyshire, Edward3 | |
通讯作者 | Engelbrecht, Johann P. |
来源期刊 | CATENA
![]() |
ISSN | 0341-8162 |
EISSN | 1872-6887 |
出版年 | 2014 |
卷号 | 117页码:119-132 |
英文摘要 | This paper reports on sequential aerosol sample sets collected at the Campus de Tafira, University of Las Palmas de Gran Canaria (ULPGC), in 2010. Gran Canaria is located approximately 250 km off the coast of North Africa and at the northern margin of the dominant Saharan dust plumes being blown westward across the Atlantic Ocean. PM2" aerosol samples were collected on 47 mm filter substrates of Teflon, quartz fiber and Nuclepore, generally at weekly sampling intervals. Subsets of these were analyzed for their mass, as well as elemental and ionic compositions. The 2010 annual geometric mean PM2.5 concentration at Tafira was 6.2 mu g/m(3), with only two particularly dusty events. From a simultaneous PK study at the same site, a PM2.5/PM10 mass ratio of 0.35 was calculated. Diagnostic chemical ratios for PM2.5, for both moderate and severe Saharan dust events (calimas) in 2010 are: Al : si : k : Ti : Mn : Fe : Sr 1 : 2.818 : 0.330 : 0.012 : 0.847 : 0.0088 To better understand the mineralogy of the aerosols and for inter-comparison purposes, normative mineral compositions were calculated from the chemical compositions. Depending on their transport patterns, four source regions, each with a distinct mineralogical signature were distinguished. The Northwest to North sector (Oceanic NW) aerosols contain evaporites, secondary ammonium sulfate, lesser amounts of organic carbon, and minor amounts of quartz and other silicates. The North to Northeast sector (Europe NE) generated aerosols of evaporites, ammonium sulfate and organic carbon. The Northeast (Africa NE) sector, with influx of air from the Iberian Peninsula and North Africa, contained evaporites and secondary ammonium sulfate with some organic carbon, and minor amounts of silicates and quartz. In 2010, the main African transport pathway from the Sahara region and across northern Mali, northern Mauritania, Western Sahara and Morocco was responsible for elevated concentrations of mineral dust during calima events. (C) 2013 Elsevier B.V. All rights reserved. |
英文关键词 | Gran Canaria calima events Airborne mineral dust Mineral dust in PM2.5 Dust mineralogy and chemistry Dust transport pathways Saharan dust sources |
类型 | Article |
语种 | 英语 |
国家 | USA ; Spain ; England |
收录类别 | SCI-E |
WOS记录号 | WOS:000334481700013 |
WOS关键词 | SAHARAN-MINERAL-DUST ; AFRICAN DUST ; DESERT DUST ; OIL COMBUSTION ; SOURCE-REGIONS ; ATLANTIC ; AIR ; ISLANDS ; AEROSOLS ; PARTICLES |
WOS类目 | Geosciences, Multidisciplinary ; Soil Science ; Water Resources |
WOS研究方向 | Geology ; Agriculture ; Water Resources |
来源机构 | University of London ; Desert Research Institute |
资源类型 | 期刊论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/181294 |
作者单位 | 1.Univ Nevada, Desert Res Inst, Reno, NV 89506 USA; 2.Univ Las Palmas Gran Canaria, Dept Phys, Las Palmas Gran Canaria, Spain; 3.Univ London, London WC1E 7HU, England |
推荐引用方式 GB/T 7714 | Engelbrecht, Johann P.,Menendez, Inmaculada,Derbyshire, Edward. Sources of PM2.5 impacting on Gran Canaria, Spain[J]. University of London, Desert Research Institute,2014,117:119-132. |
APA | Engelbrecht, Johann P.,Menendez, Inmaculada,&Derbyshire, Edward.(2014).Sources of PM2.5 impacting on Gran Canaria, Spain.CATENA,117,119-132. |
MLA | Engelbrecht, Johann P.,et al."Sources of PM2.5 impacting on Gran Canaria, Spain".CATENA 117(2014):119-132. |
条目包含的文件 | 条目无相关文件。 |
除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。