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dc.contributor.author
Johnson, Matthew S.
dc.contributor.author
Meskhidze, Nicholas
dc.contributor.author
Solmon, Fabien
dc.contributor.author
Gassó, Santiago
dc.contributor.author
Chuang, Patrick Y.
dc.contributor.author
Gaiero, Diego Marcelo
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dc.contributor.author
Yantosca, Robert M.
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Wu, Shiliang
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Wang, Yuxuan
dc.contributor.author
Carouge, Claire
dc.date.available
2018-08-06T18:39:09Z
dc.date.issued
2010-06
dc.identifier.citation
Johnson, Matthew S.; Meskhidze, Nicholas; Solmon, Fabien; Gassó, Santiago; Chuang, Patrick Y.; et al.; Modeling dust and soluble iron deposition to the South Atlantic Ocean; American Geophysical Union; Journal of Geophysical Research; 115; 15; 6-2010
dc.identifier.issn
0148-0227
dc.identifier.uri
http://hdl.handle.net/11336/54295
dc.description.abstract
The global chemical transport model GEOS-Chem, implemented with a dust-iron dissolution scheme, was used to analyze the magnitude and spatial distribution of mineral dust and soluble-iron (sol-Fe) deposition to the South Atlantic Ocean (SAO). The comparison of model results with remotely sensed data shows that GEOS-Chem can capture dust source regions in Patagonia and characterize the temporal variability of dust outflow. For a year-long model simulation, 22 Tg of mineral dust and 4 Gg of sol-Fe were deposited to the surface waters of the entire SAO region, with roughly 30% of this dust and sol-Fe predicted to be deposited to possible high nitrate low chlorophyll oceanic regions. Model-predicted dissolved iron fraction of mineral dust over the SAO was small, on average only accounting for 0.57% of total iron. Simulations suggest that the primary reason for such a small fraction of sol-Fe is the low ambient concentrations of acidic trace gases available for mixing with dust plumes. Overall, the amount of acid added to the deliquesced aerosol solution was not enough to overcome the alkalinity buffer of Patagonian dust and initiate considerable acid dissolution of mineral-iron. Sensitivity studies show that the amount of sol-Fe deposited to the SAO was largely controlled by the initial amount of sol-Fe at the source region, with limited contribution from the spatial variability of Patagonian-desert topsoil mineralogy and natural sources of acidic trace gases. Simulations suggest that Patagonian dust should have a minor effect on biological productivity in the SAO.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
American Geophysical Union
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dc.rights
info:eu-repo/semantics/openAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
Biological Productivity
dc.subject
Dissolved Iron
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Dust Sources
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Chemical Transport Models
dc.subject.classification
Meteorología y Ciencias Atmosféricas
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dc.subject.classification
Ciencias de la Tierra y relacionadas con el Medio Ambiente
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dc.subject.classification
CIENCIAS NATURALES Y EXACTAS
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dc.title
Modeling dust and soluble iron deposition to the South Atlantic Ocean
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2018-08-02T14:49:37Z
dc.identifier.eissn
2156-2202
dc.journal.volume
115
dc.journal.number
15
dc.journal.pais
Estados Unidos
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dc.description.fil
Fil: Johnson, Matthew S.. North Carolina Sate University; Estados Unidos
dc.description.fil
Fil: Meskhidze, Nicholas. North Carolina Sate University; Estados Unidos
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Fil: Solmon, Fabien. French National Center for Scientific Research; Francia
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Fil: Gassó, Santiago. University of Maryland; Estados Unidos
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Fil: Chuang, Patrick Y.. California State University; Estados Unidos
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Fil: Gaiero, Diego Marcelo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Centro de Investigaciones en Ciencias de la Tierra. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas Físicas y Naturales. Centro de Investigaciones en Ciencias de la Tierra; Argentina
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Fil: Yantosca, Robert M.. Harvard University; Estados Unidos
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Fil: Wu, Shiliang. Michigan Technological University; Estados Unidos
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Fil: Wang, Yuxuan. Tsinghua University Beijing; China
dc.description.fil
Fil: Carouge, Claire. Harvard University; Estados Unidos
dc.journal.title
Journal of Geophysical Research
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dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://agupubs.onlinelibrary.wiley.com/doi/abs/10.1029/2009JD013311
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/https://doi.org/10.1029/2009JD013311
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