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Contribution of organic aerosols to reactive nitrogen deposition in South America

Grant number: 13/02101-9
Support Opportunities:Scholarships abroad - Research Internship - Doctorate
Effective date (Start): June 10, 2013
Effective date (End): June 09, 2014
Field of knowledge:Physical Sciences and Mathematics - Geosciences - Meteorology
Principal Investigator:Karla Maria Longo de Freitas
Grantee:Madeleine Sánchez Gácita Casagrande
Supervisor: Scot T. Martin
Host Institution: Instituto Nacional de Pesquisas Espaciais (INPE). Ministério da Ciência, Tecnologia e Inovações (Brasil). São José dos Campos , SP, Brazil
Research place: Harvard University, Cambridge, United States  
Associated to the scholarship:12/09934-3 - Reactive nitrogen deposition in South America, BP.DR


Data from several in-situ studies suggest that the organic fraction in the total reactive nitrogen (Nr) atmospheric deposition is significant both worldwide and in South America. Uncertainties in its modeling are also very high and, typically, models tend to underestimate the organic fraction. The present project aims to reduce the gap between observational data and modeling results for organic nitrogen (ON) with focus on biomass burning emissions and its long-range transport and deposition processes and to achieve a better understanding of the organic fraction (ON) in the total reactive nitrogen atmospheric budget and deposition and how it might be related with the mass concentration and other parameters of relevant aerosol populations. In particular, it is proposed to investigate the relation between the organic fraction of the aerosol component as determined in SAMBBA campaign and the aerosol population modeled with CCATT-BRAMS. This BEPE internship is proposed for a nine months period and is the second of two. The first BEPE is proposed for a period of three months, with the objective of to compile a database of organic nitrogen budget and deposition in South America with the in-situ data available, including the data gathered at SAMBBA experiment. Both BEPE projects complement each other and contribute to the study of the contribution of organic aerosols to reactive nitrogen deposition in South America, in the frame of the PhD project "Atmospheric deposition of reactive nitrogen in South America" (Process 2012/09934-3). (AU)

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Scientific publications
(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)
GACITA, MADELEINE SANCHEZ; LONGO, KARLA M.; FREIRE, JULLIANA L. M.; FREITAS, SAULO R.; MARTIN, SCOT T.. Impact of mixing state and hygroscopicity on CCN activity of biomass burning aerosol in Amazonia. Atmospheric Chemistry and Physics, v. 17, n. 3, p. 2373-2392, . (13/02101-9, 12/13575-9, 12/09934-3, 14/01564-8)

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