Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1002/2017JD027505 |
Linking Barbados Mineral Dust Aerosols to North African Sources Using Elemental Composition and Radiogenic Sr, Nd, and Pb Isotope Signatures | |
Bozlaker, Ayse1; Prospero, Joseph M.2; Price, Jim3; Chellam, Shankararaman1,4 | |
通讯作者 | Chellam, Shankararaman |
来源期刊 | JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
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ISSN | 2169-897X |
EISSN | 2169-8996 |
出版年 | 2018 |
卷号 | 123期号:2页码:1384-1400 |
英文摘要 | Large quantities of African dust are carried across the Atlantic to the Caribbean Basin and southern United States where it plays an important role in the biogeochemistry of soils and waters and in air quality. Dusts’ elemental and isotopic composition was comprehensively characterized in Barbados during the summers of 2013 and 2014, the season of maximum dust transport. Although total suspended insoluble particulate matter (TSIP) mass concentrations varied significantly daily and between the two summers, the abundances (gelement/g TSIP) of 50 elements during high-dust days (HDD) were similar. Aerosols were regularly enriched in Na, Cu, Zn, As, Se, Mo, Cd, Sn, Sb, and W relative to the upper continental crust. Enrichment of these elements, many of which are anthropogenically emitted, was significantly reduced during HDD, attributed to mixing and dilution with desert dust over source regions. Generally, Ti/Al, Si/Al, Ca/Al, Ti/Fe, Si/Fe, and Ca/Fe ratios during HDD differed from their respective values in hypothesized North African source regions. Nd isotope composition was relatively invariant for low-dust days (LDD) and HDD. In contrast, HDD-aerosols were more radiogenic exhibiting higher Sr-87/Sr-86, Pb-206/Pb-204, Pb-207/Pb-204, and Pb-208/Pb-204 ratios compared to LDD. Generally, Barbados aerosols’ composition ranged within narrow limits and was much more homogeneous than that of hypothesized African source soils. Our results suggest that summertime Barbados aerosols are dominated by a mixture of particles originating from sources in the Sahara-Sahel regions. The Bodele Depression, long suspected as a major source, appears to be an insignificant contributor of summertime western Atlantic dust. |
英文关键词 | dust Barbados Sahara-Sahel elemental composition radiogenic isotopes long-range transport |
类型 | Article |
语种 | 英语 |
国家 | USA |
收录类别 | SCI-E |
WOS记录号 | WOS:000425520200045 |
WOS关键词 | LONG-RANGE TRANSPORT ; SEA-SALT SULFATE ; SOUTHEASTERN UNITED-STATES ; ATMOSPHERIC TRACE-METALS ; MARINE BOUNDARY-LAYER ; TRADE-WIND AEROSOLS ; SAHARAN DUST ; PARTICULATE MATTER ; DESERT DUST ; CANARY-ISLANDS |
WOS类目 | Meteorology & Atmospheric Sciences |
WOS研究方向 | Meteorology & Atmospheric Sciences |
资源类型 | 期刊论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/210952 |
作者单位 | 1.Texas A&M Univ, Dept Civil Engn, College Stn, TX 77843 USA; 2.Univ Miami, Rosenstiel Sch Marine & Atmospher Sci, 4600 Rickenbacker Causeway, Miami, FL 33149 USA; 3.Texas Commiss Environm Qual, Air Qual Div, Austin, TX USA; 4.Texas A&M Univ, Dept Chem Engn, College Stn, TX 77843 USA |
推荐引用方式 GB/T 7714 | Bozlaker, Ayse,Prospero, Joseph M.,Price, Jim,et al. Linking Barbados Mineral Dust Aerosols to North African Sources Using Elemental Composition and Radiogenic Sr, Nd, and Pb Isotope Signatures[J],2018,123(2):1384-1400. |
APA | Bozlaker, Ayse,Prospero, Joseph M.,Price, Jim,&Chellam, Shankararaman.(2018).Linking Barbados Mineral Dust Aerosols to North African Sources Using Elemental Composition and Radiogenic Sr, Nd, and Pb Isotope Signatures.JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,123(2),1384-1400. |
MLA | Bozlaker, Ayse,et al."Linking Barbados Mineral Dust Aerosols to North African Sources Using Elemental Composition and Radiogenic Sr, Nd, and Pb Isotope Signatures".JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES 123.2(2018):1384-1400. |
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