气候变化领域集成服务门户(CCPortal): Tracking the changes of iron solubility and air pollutants traces as African dust transits the Atlantic in the Saharan dust outbreaks

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DOI	10.1016/j.atmosenv.2020.118092
	Tracking the changes of iron solubility and air pollutants traces as African dust transits the Atlantic in the Saharan dust outbreaks
	Rodríguez S.; Prospero J.M.; López-Darias J.; García-Alvarez M.-I.; Zuidema P.; Nava S.; Lucarelli F.; Gaston C.J.; Galindo L.; Sosa E.
发表日期	2021
ISSN	1352-2310
卷号	246
英文摘要	We studied the solubility, in real sea water, of iron present in the African dust outbreaks that traverse the Atlantic. Based on measurements of soluble iron (sFe) and aerosol chemistry, we found iron solubilities within the range of 0.4–1.8% in Tenerife, 0.4–3.1% in Barbados and 1.6–12% in Miami. We apportioned the concentrations of sFe between the three sources and processes that we identified: (1) dust, (2) heavy fuel oil combustion emissions, associated with an excess of vanadium and nickel, and (3) atmospheric processing, which is influenced by acidic pollutants. We tracked the propagation of the dust-front of the African dust outbreaks across the Atlantic, which are associated with dust peak events at the impacting sites. During the westward transport across the Atlantic, the contribution to sFe from dust decreased (63%, 43% and 9% in Tenerife, Barbados and Miami, respectively), whereas the contribution due to atmospheric processing increased (26%, 45% and 74% in Tenerife, Barbados and Miami, respectively). In these Saharan-dust outbreaks, the concentrations of sFe due to heavy fuel oil combustion were significantly lower (mostly < 5 ng/m3) than those in the polluted marine atmosphere (10–200 ng/m3). The overall results are consistent with the idea that the mixing of dust with acid pollutants increases the solubility of iron during the African-dust outbreaks that traverse the Atlantic. © 2020 The Authors
关键词	Acid processing Anthropogenic soluble iron Dust aging Iron solubility Soluble iron
语种	英语
scopus关键词	Atmospheric chemistry; Atmospheric movements; Combustion; Dust; Fuel oils; Iron; Seawater; Solubility; Acidic pollutant; Aerosol chemistry; Air pollutants; Iron solubilities; Marine atmosphere; Measurements of; Saharan dust; Soluble irons; Air pollution; aluminum; fuel oil; iron; nickel; nitrate; sea water; sulfate; vanadium; aerosol; combustion; concentration (composition); marine atmosphere; nickel; solubility; vanadium; aerosol; Africa south of the Sahara; air pollutant; air sampling; Article; atmospheric transport; Barbados; combustion; concentration (parameter); dry deposition; dust; North Africa; optical depth; plume; priority journal; solubility; summer; Barbados; Canary Islands; Florida [United States]; Miami; Santa Cruz de Tenerife [(PRV) Canary Islands]; Spain; Tenerife; United States
来源期刊	ATMOSPHERIC ENVIRONMENT
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/248657
作者单位	Izaña Atmospheric Research Centre, AEMET, Tenerife, Spain; Experimental Station of Arid Zones, EEZA CSIC, Almería, Spain; Institute of Natural Products and Agrobiology, IPNA CSIC, Tenerife, Spain; Rosenstiel School of Marine and Atmospheric Science, University of Miami, United States; Department of Chemistry, University of La Laguna, Tenerife, Spain; General Service of Support to Research, SEGAI, University of La Laguna, Tenerife, Spain; Physics Department, University of Florence, Firenze, Italy; Istituto Nazionale di Fisica Nucleare, Firenze, Italy
推荐引用方式 GB/T 7714	Rodríguez S.,Prospero J.M.,López-Darias J.,et al. Tracking the changes of iron solubility and air pollutants traces as African dust transits the Atlantic in the Saharan dust outbreaks[J],2021,246.
APA	Rodríguez S..,Prospero J.M..,López-Darias J..,García-Alvarez M.-I..,Zuidema P..,...&Sosa E..(2021).Tracking the changes of iron solubility and air pollutants traces as African dust transits the Atlantic in the Saharan dust outbreaks.ATMOSPHERIC ENVIRONMENT,246.
MLA	Rodríguez S.,et al."Tracking the changes of iron solubility and air pollutants traces as African dust transits the Atlantic in the Saharan dust outbreaks".ATMOSPHERIC ENVIRONMENT 246(2021).