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DOI | 10.5194/acp-18-13429-2018 |
Composition and mixing state of atmospheric aerosols determined by electron microscopy: method development and application to aged Saharan dust deposition in the Caribbean boundary layer | |
Kandler, Konrad1; Schneiders, Kilian1; Ebert, Martin1; Hartmann, Markus1,3; Weinbruch, Stephan1; Prass, Maria2; Poehlker, Christopher2 | |
2018-09-21 | |
发表期刊 | ATMOSPHERIC CHEMISTRY AND PHYSICS |
ISSN | 1680-7316 |
EISSN | 1680-7324 |
出版年 | 2018 |
卷号 | 18期号:18页码:13429-13455 |
文章类型 | Article |
语种 | 英语 |
国家 | Germany |
英文摘要 | The microphysical properties, composition and mixing state of mineral dust, sea salt and secondary compounds were measured by active and passive aerosol sampling, followed by electron microscopy and X-ray fluorescence in the Caribbean marine boundary layer. Measurements were carried out at Ragged Point, Barbados during June-July 2013 and August 2016. Techniques are presented and evaluated, which allow for statements on atmospheric aerosol concentrations and aerosol mixing state based on collected samples. It became obvious that in the diameter range with the highest dust deposition the deposition velocity models disagree by more than 2 orders of magnitude. Aerosol at Ragged Point was dominated by dust, sea salt and soluble sulfates in varying proportions. The contribution of sea salt was dependent on local wind speed. Sulfate concentrations were linked to long-range transport from Africa and Europe, and South America and the southern Atlantic Ocean. Dust sources were located in western Africa. The dust silicate composition was not significantly varied. Pure feldspar grains were 3 % of the silicate particles, of which about a third were K-feldspar. The average dust deposition observed was 10 mg m(-2) d(-1) (range of 0.5-47 mg m(-2) d(-1) ), of which 0.67 mg m(-2) d(-1) was iron and 0.001 mg m(-2) d(-1) phosphorus. Iron deposition was mainly driven by silicate particles from Africa. Dust particles were mixed internally to a minor fraction (10 %), mostly with sea salt and less frequently with sulfate. It was estimated that the average dust deposition velocity under ambient conditions is increased by the internal mixture by 30 %-140 % for particles between 1 and 10 mu m dust aerodynamic diameter, with approximately 35 % at the mass median diameter of deposition (7.0 mu m). For this size, an effective deposition velocity of 6 4 mm s(-1) (geometric standard deviation of 3.1 over all individual particles) was observed. |
领域 | 地球科学 |
收录类别 | SCI-E |
WOS记录号 | WOS:000445271300002 |
WOS关键词 | LONG-RANGE TRANSPORT ; COARSE PARTICULATE MATTER ; COMPLEX REFRACTIVE-INDEX ; MINERAL-DUST ; SEA-SALT ; CLOUD CONDENSATION ; ICE NUCLEATION ; NORTH-ATLANTIC ; AFRICAN DUST ; ASPIRATION EFFICIENCY |
WOS类目 | Environmental Sciences ; Meteorology & Atmospheric Sciences |
WOS研究方向 | Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/29524 |
专题 | 地球科学 |
作者单位 | 1.Tech Univ Darmstadt, Inst Appl Geosci, D-64287 Darmstadt, Germany; 2.Max Planck Inst Chem, Multiphase Chem Dept, D-55128 Mainz, Germany; 3.Tropos Leibniz Inst Tropospher Res TROPOS, Expt Aerosol & Cloud Microphys Dept, D-04318 Leipzig, Germany |
推荐引用方式 GB/T 7714 | Kandler, Konrad,Schneiders, Kilian,Ebert, Martin,et al. Composition and mixing state of atmospheric aerosols determined by electron microscopy: method development and application to aged Saharan dust deposition in the Caribbean boundary layer[J]. ATMOSPHERIC CHEMISTRY AND PHYSICS,2018,18(18):13429-13455. |
APA | Kandler, Konrad.,Schneiders, Kilian.,Ebert, Martin.,Hartmann, Markus.,Weinbruch, Stephan.,...&Poehlker, Christopher.(2018).Composition and mixing state of atmospheric aerosols determined by electron microscopy: method development and application to aged Saharan dust deposition in the Caribbean boundary layer.ATMOSPHERIC CHEMISTRY AND PHYSICS,18(18),13429-13455. |
MLA | Kandler, Konrad,et al."Composition and mixing state of atmospheric aerosols determined by electron microscopy: method development and application to aged Saharan dust deposition in the Caribbean boundary layer".ATMOSPHERIC CHEMISTRY AND PHYSICS 18.18(2018):13429-13455. |
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