Interannual variability of estimated monthly nitrogen deposition to coastal waters due to variations of atmospheric variables model input

In this work, the influence of the interannual variation of meteorological input data on the nitrogen (N) deposition estimated applying atmospheric dispersion models is discussed. As a case study, the deposition of atmospheric oxidized N coming from the NO x generated in the Metropolitan Area of Bue...

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Bibliographic Details
Published in:Atmospheric research 2010-04, Vol.96 (1), p.88-102
Main Authors: Pineda Rojas, Andrea L., Venegas, Laura E.
Format: Article
Language:English
Subjects:
Applied sciences
Atmospheric deposition
Atmospheric pollution
Buenos Aires
de la Plata River
Earth sciences
Earth, ocean, space
Engineering and environment geology. Geothermics
Exact sciences and technology
Interannual variability
Natural water pollution
Oxidized nitrogen compounds
Pollutants physicochemistry study: properties, effects, reactions, transport and distribution
Pollution
Pollution, environment geology
Seawaters, estuaries
Water treatment and pollution
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Summary:In this work, the influence of the interannual variation of meteorological input data on the nitrogen (N) deposition estimated applying atmospheric dispersion models is discussed. As a case study, the deposition of atmospheric oxidized N coming from the NO x generated in the Metropolitan Area of Buenos Aires to waters of de la Plata River is evaluated for three years, considering high spatial (1 km 2) and temporal (1 h) resolutions. The interannual variation of monthly N dry deposition is in the range 10–160%, being mostly controlled by the photochemical activity of the atmosphere and the frequency of winds towards the river. The variation of monthly wet deposition values between years is in general greater than a factor of 2. It is mainly affected by the frequency of rainy hours and the precipitation rate during offshore wind conditions, and reaches a factor of 124 as a result of the variation of these variables in a factor of 4 and 3, respectively. These results show that estimated monthly N deposition to coastal waters may vary significantly between years. The evaluation of the atmospheric N that can be transferred to coastal waters can therefore be improved considering several years of atmospheric input data.
ISSN:0169-8095
1873-2895
DOI:10.1016/j.atmosres.2009.11.016