Arid
DOI10.3989/scimar.04344.27A
Grain size, morphometry and mineralogy of airborne input in the Canary basin: evidence of iron particle retention in the mixed layer
Jaramillo-Velez, Alfredo1; Menendez, Inmaculada2; Alonso, Ignacio2; Mangas, Jose2; Hernandez-Leon, Santiago2
通讯作者Jaramillo-Velez, Alfredo
来源期刊SCIENTIA MARINA
ISSN0214-8358
EISSN1886-8134
出版年2016
卷号80期号:3页码:395-408
英文摘要

Aeolian dust plays an important role in climate and ocean processes. Particularly, Saharan dust deposition is of importance in the Canary Current due to its content of iron minerals, which are fertilizers of the ocean. In this work, dust particles are characterized mainly by granulometry, morphometry and mineralogy, using image processing and scanning northern Mauritania and the Western Sahara. The concentration of terrigenous material was measured in three environments: the atmosphere (300 m above sea level), the mixed layer at 10 m depth, and 150 m depth. Samples were collected before and during the dust events, thus allowing the effect of Saharan dust inputs in the water column to be assessed. The dominant grain size was coarse silt. Dominant minerals were iron oxy-hydroxides, silicates and Ca-Mg carbonates. A relative increase of iron mineral particles (hematite and goethite) was detected in the mixed layer, reflecting a higher permanence of iron in the water column despite the greater relative density of these minerals in comparison with the other minerals. This higher iron particle permanence does not appear to be explained by physical processes. The retention of this metal by colloids or microorganisms is suggested to explain its long residence time in the mixed layer.


英文关键词textural analysis Saharan dust iron particles Canary Islands
类型Article
语种英语
国家Colombia ; Spain
收录类别SCI-E
WOS记录号WOS:000385611400010
WOS关键词NITROGEN-FIXATION ; ATLANTIC-OCEAN ; COLLOIDAL IRON ; AFRICAN DUST ; DESERT DUST ; ACCUMULATION ; VARIABILITY ; DEPOSITION ; FLUXES ; DISSOLUTION
WOS类目Marine & Freshwater Biology
WOS研究方向Marine & Freshwater Biology
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/196279
作者单位1.Univ Antioquia UdeA, Grp Estudios Ocean Luis Fernando Vasquez Bedoya G, Escuela Ambiental, Fac Ingn, Calle 70 52-21, Medellin, Colombia;
2.Univ Las Palmas Gran Canaria, IOCAG, Inst Oceanog & Cambio Global, Campus Taliarte, Telde, Gran Canaria, Spain
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GB/T 7714
Jaramillo-Velez, Alfredo,Menendez, Inmaculada,Alonso, Ignacio,et al. Grain size, morphometry and mineralogy of airborne input in the Canary basin: evidence of iron particle retention in the mixed layer[J],2016,80(3):395-408.
APA Jaramillo-Velez, Alfredo,Menendez, Inmaculada,Alonso, Ignacio,Mangas, Jose,&Hernandez-Leon, Santiago.(2016).Grain size, morphometry and mineralogy of airborne input in the Canary basin: evidence of iron particle retention in the mixed layer.SCIENTIA MARINA,80(3),395-408.
MLA Jaramillo-Velez, Alfredo,et al."Grain size, morphometry and mineralogy of airborne input in the Canary basin: evidence of iron particle retention in the mixed layer".SCIENTIA MARINA 80.3(2016):395-408.
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