Please use this identifier to cite or link to this item: https://app.uff.br/riuff/handle/1/17554
Title: DEPOSIÇÃO ATMOSFÉRICA NA BACIA DO ALTO CURSO DO RIO PAQUEQUER PARQUE NACIONAL DA SERRA DOS ÓRGÃOS, TERESÓPOLIS, RJ.
Other Titles: Atmospheric deposition in Serra dos Órgãos National Park, Teresópolis, RJ, Brazil
Keywords: Deposição atmosférica;  poluição atmosférica;  óxido nitroso;  Parque Nacional da Serra dos Órgãos.;  Atmospheric deposition;  atmospheric pollution;  nitrous oxide;  Parque Nacional da Serra dos Órgãos
Issue Date: 8-Mar-2006
Abstract: Wet and dry deposition fluxes of major ions were measured from August 2004 to November 2005 at the headquarters of Serra dos Órgãos National Park, in Teresópolis. In a forest site nearby, nitrous oxide (N2O) fluxes were measured at the soil surface from January to April 2005. Average rainwater pH was 5,2. The most abundant ions (in Xeq L-1) were ammonium, sulfate, and chloride. About 90% of the total sulfur (S) and nitrogen (N) were associated with wet deposition. The estimated total (wet + dry) deposition fluxes of sulfate and inorganic nitrogen (ammonium and nitrate) were 295 mol ha-1 ano-1 (9,4 kg S ha-1 ano-1) and 824 mol ha-1 ano-1 (11,5 kg N ha-1 ano-1), of which 70% is due to ammonium and the remainder to nitrate. More than 90% of the total sulfate were originated from oxidation of sulfur dioxide (SO2) in the atmosphere and the remaining from sea salt aerosols. The deposition fluxes of NH4+, SO42- e NO3- were bigger than in other sites of Rio de Janeiro state, like Itatiaia National Park, Ilha Grande, Niterói e Rio de Janeiro city. This indicates that PARNASO due its geographical localization and the actions of the wind from South quadrant actuate like a receptor area of the emissions from Rio de Janeiro Metropolitan Region (RJMR). The average N2O flux at the soil-atmosphere interface was 3,1 Xg N m-2 h-1, which was lower than other values found in forest soils of Rio de Janeiro state. The water from Paquequer river showed high values of NO3 - and SO4 2-. This values are probably due the high deposition of N and S. The Cluster analysis and the Principal Components Analysis showed that PARNASO is under the influence of the emissions from RJMR.
URI: https://app.uff.br/riuff/handle/1/17554
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