Grain size, morphometry and mineralogy of airborne input in the Canary basin : evidence of iron particle retention in the mixed layer

SUMMARY: 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, m...

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Autores:
Jaramillo Vélez, Alfredo
Menéndez, Inmaculada
Alonso, Ignacio
Mangas, José
Hernández León, Santiago
Tipo de recurso:
Article of investigation
Fecha de publicación:
2016
Institución:
Universidad de Antioquia
Repositorio:
Repositorio UdeA
Idioma:
eng
OAI Identifier:
oai:bibliotecadigital.udea.edu.co:10495/25313
Acceso en línea:
http://hdl.handle.net/10495/25313
https://scientiamarina.revistas.csic.es/index.php/scientiamarina/article/view/1638/
Palabra clave:
Islas Canarias (España)
Textural analysis
Saharan dust
Iron particles
Polvo sahariano
partículas de hierro
Rights
openAccess
License
http://creativecommons.org/licenses/by/2.5/co/
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dc.title.spa.fl_str_mv Grain size, morphometry and mineralogy of airborne input in the Canary basin : evidence of iron particle retention in the mixed layer
dc.title.translated.spa.fl_str_mv Granulometría, morfometría y mineralogía de polvo atmosférico que entra a la cuenca canaria : evidencia de retención de partículas de hierro en la capa de mezcla
title Grain size, morphometry and mineralogy of airborne input in the Canary basin : evidence of iron particle retention in the mixed layer
spellingShingle Grain size, morphometry and mineralogy of airborne input in the Canary basin : evidence of iron particle retention in the mixed layer
Islas Canarias (España)
Textural analysis
Saharan dust
Iron particles
Polvo sahariano
partículas de hierro
title_short Grain size, morphometry and mineralogy of airborne input in the Canary basin : evidence of iron particle retention in the mixed layer
title_full Grain size, morphometry and mineralogy of airborne input in the Canary basin : evidence of iron particle retention in the mixed layer
title_fullStr Grain size, morphometry and mineralogy of airborne input in the Canary basin : evidence of iron particle retention in the mixed layer
title_full_unstemmed Grain size, morphometry and mineralogy of airborne input in the Canary basin : evidence of iron particle retention in the mixed layer
title_sort Grain size, morphometry and mineralogy of airborne input in the Canary basin : evidence of iron particle retention in the mixed layer
dc.creator.fl_str_mv Jaramillo Vélez, Alfredo
Menéndez, Inmaculada
Alonso, Ignacio
Mangas, José
Hernández León, Santiago
dc.contributor.author.none.fl_str_mv Jaramillo Vélez, Alfredo
Menéndez, Inmaculada
Alonso, Ignacio
Mangas, José
Hernández León, Santiago
dc.contributor.researchgroup.spa.fl_str_mv GISMAC. Grupo de Investigación en Sistemas Marinos y Costeros
dc.subject.lemb.none.fl_str_mv Islas Canarias (España)
topic Islas Canarias (España)
Textural analysis
Saharan dust
Iron particles
Polvo sahariano
partículas de hierro
dc.subject.proposal.spa.fl_str_mv Textural analysis
Saharan dust
Iron particles
Polvo sahariano
partículas de hierro
description SUMMARY: 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.
publishDate 2016
dc.date.issued.none.fl_str_mv 2016
dc.date.accessioned.none.fl_str_mv 2022-01-16T01:16:35Z
dc.date.available.none.fl_str_mv 2022-01-16T01:16:35Z
dc.type.spa.fl_str_mv Artículo de investigación
dc.type.coar.spa.fl_str_mv http://purl.org/coar/resource_type/c_2df8fbb1
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dc.identifier.citation.spa.fl_str_mv Jaramillo-Vélez A., Menéndez I., Alonso I., Mangas J., Hernández-León S. 2016. Grain size, morphometry and mineralogy of airborne input in the Canary basin: evidence of iron particle retention in the mixed layer. Sci. Mar. 80(3): 395-408. doi: http://dx.doi.org/10.3989/scimar.04344.27A
dc.identifier.issn.none.fl_str_mv 0214-8358
dc.identifier.uri.none.fl_str_mv http://hdl.handle.net/10495/25313
dc.identifier.doi.none.fl_str_mv 10.3989/scimar.04344.27A
dc.identifier.eissn.none.fl_str_mv 1886-8134
dc.identifier.url.spa.fl_str_mv https://scientiamarina.revistas.csic.es/index.php/scientiamarina/article/view/1638/
identifier_str_mv Jaramillo-Vélez A., Menéndez I., Alonso I., Mangas J., Hernández-León S. 2016. Grain size, morphometry and mineralogy of airborne input in the Canary basin: evidence of iron particle retention in the mixed layer. Sci. Mar. 80(3): 395-408. doi: http://dx.doi.org/10.3989/scimar.04344.27A
0214-8358
10.3989/scimar.04344.27A
1886-8134
url http://hdl.handle.net/10495/25313
https://scientiamarina.revistas.csic.es/index.php/scientiamarina/article/view/1638/
dc.language.iso.spa.fl_str_mv eng
language eng
dc.relation.ispartofjournalabbrev.spa.fl_str_mv Sci. Mar.
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dc.relation.citationissue.spa.fl_str_mv 3
dc.relation.citationstartpage.spa.fl_str_mv 395
dc.relation.citationvolume.spa.fl_str_mv 80
dc.relation.ispartofjournal.spa.fl_str_mv Scientia Marina
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dc.publisher.spa.fl_str_mv Consejo Superior de Investigaciones Científicas
dc.publisher.place.spa.fl_str_mv Barcelona, España
institution Universidad de Antioquia
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spelling Jaramillo Vélez, AlfredoMenéndez, InmaculadaAlonso, IgnacioMangas, JoséHernández León, SantiagoGISMAC. Grupo de Investigación en Sistemas Marinos y Costeros2022-01-16T01:16:35Z2022-01-16T01:16:35Z2016Jaramillo-Vélez A., Menéndez I., Alonso I., Mangas J., Hernández-León S. 2016. Grain size, morphometry and mineralogy of airborne input in the Canary basin: evidence of iron particle retention in the mixed layer. Sci. Mar. 80(3): 395-408. doi: http://dx.doi.org/10.3989/scimar.04344.27A0214-8358http://hdl.handle.net/10495/2531310.3989/scimar.04344.27A1886-8134https://scientiamarina.revistas.csic.es/index.php/scientiamarina/article/view/1638/SUMMARY: 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.RESUMEN: El polvo atmosférico juega un papel importante en el clima y en los procesos oceánicos, particularmente la deposición del polvo sahariano es de suma importancia en la corriente canaria debido a que contiene minerales de hierro que actúan como fertilizante del océano. En este trabajo las partículas de polvo fueron caracterizadas mediante granulometría, morfometría y mineralogía, usando procesamiento de imágenes, microscopia electrónica (SEM-EDS). El polvo analizado en este estudio fue generado al norte de Mauritania y Sahara Occidental. Su concentración fue medida en tres ambientes diferentes: la atmósfera (300 m.s.n.m.), la capa de mezcla (10 m de profundidad) y a 150 m de profundidad). Las muestras fueron colectadas antes y durante los eventos de polvo, permitiendo la determinación del efecto del aporte de polvo sahariano a la columna de agua. El tamaño de grano predominante fueron los limos gruesos. Los minerales dominantes fueron oxi-hidróxidos, silicatos y carbonatos. Un incremento de partículas ricas en hierro (hematita y goetita) fue detectado en la capa de mezcla, reflejando una alta permanencia del hierro en la columna de agua a pesar de la alta densidad que presentan esos minerales con respecto a otros. Esta alta permanencia de hierro no parece ser explicada por procesos físicos. La retención de este metal por coloides o microrganismos es la explicación sugerida ante el alto tiempo de residencia en la capa de mezcla.COL002384940application/pdfengConsejo Superior de Investigaciones CientíficasBarcelona, Españahttp://creativecommons.org/licenses/by/2.5/co/https://creativecommons.org/licenses/by/4.0/info:eu-repo/semantics/openAccesshttp://purl.org/coar/access_right/c_abf2Grain size, morphometry and mineralogy of airborne input in the Canary basin : evidence of iron particle retention in the mixed layerGranulometría, morfometría y mineralogía de polvo atmosférico que entra a la cuenca canaria : evidencia de retención de partículas de hierro en la capa de mezclaArtículo de investigaciónhttp://purl.org/coar/resource_type/c_2df8fbb1https://purl.org/redcol/resource_type/ARThttp://purl.org/coar/version/c_970fb48d4fbd8a85info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionIslas Canarias (España)Textural analysisSaharan dustIron particlesPolvo saharianopartículas de hierroSci. 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