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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Influence of intensive agriculture on dry deposition of aerosol nutrients

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Author(s):
Allen, Andrew G. [1] ; Cardoso, Arnaldo A. [1] ; Wiatr, Antony G. [2] ; Machado, Cristine M. D. [1] ; Paterlini, Willian C. [1] ; Baker, Jacob [2]
Total Authors: 6
Affiliation:
[1] Univ Estadual Paulista, Inst Quim, BR-14801970 Araraquara, SP - Brazil
[2] Univ Birmingham, Sch Geog Earth & Environm Sci, Birmingham B15 2TT, W Midlands - England
Total Affiliations: 2
Document type: Journal article
Source: Journal of the Brazilian Chemical Society; v. 21, n. 1, p. 87-97, 2010.
Web of Science Citations: 21
Abstract

A procedure is presented for quantification of sources contributing to atmospheric aerosol chemical nutrient concentrations and dry deposition fluxes. Source apportionment using principal component analysis (PCA) and multiple linear regression analysis (MLRA) was followed by application of a size-segregated particle dry deposition model. In a rural region of southeast Brazil, biomass burning, products of secondary reactions, and soil dust re-suspension explained 43%, 31% and 21% of PM2.5 mass, respectively. Re-suspension and biomass burning contributed 22% and 19%, respectively, to PM10 mass, and re-suspension accounted for approximately half of the mass of coarse particles. At least 40% of NO3--N, 20% of phosphorus and 55% of potassium deposited originated from agriculture-related emissions. Deposition to tropical forest is currently higher than the minimum under natural conditions by factors of 12.2 (N), 6.2 (P) and 2.6 (K). (AU)

FAPESP's process: 05/53001-8 - Studies of nitrogen compounds present in the atmosphere in the Central region of the State of São Paulo
Grantee:Arnaldo Alves Cardoso
Support Opportunities: Regular Research Grants