Dry and wet atmospheric deposition of nitrogen and phosphorus in Singapore

He, Jun; Balasubramanian, Rajasekhar; Burger, David F.; Hicks, Kevin; Kuylenstierna, Johan; Palani, Sundarambal

doi:10.1016/j.atmosenv.2011.02.036

Cited by 81 publications

(39 citation statements)

References 48 publications

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“…It has been found in previous studies that the contribution of NO − 3 to PM 2.5 and PM 10 is larger than that of NH + 4 , whereas in terms of N, the concentration of NH + 4 -N is larger than NO − 3 -N in both PM 2.5 and PM 10 He et al, 2001). However, the components of dry-deposited N at the BJ, TJ, TS and YF sites do not coincide with these studies.…”

Section: Particulate Dry-deposited N Species Vs Composition Of Partimentioning

confidence: 99%

“…Although N deposition is an important nutrient resource in the agricultural areas , it may also result in the enhanced emissions of nitrous oxide (N 2 O) , which is an important greenhouse gas. Moreover, coastal waters near industrial regions, such as Bohai Bay, may receive greater N loads from atmospheric deposition and are susceptible to eutrophication (Barile and Lapointe, 2005;He et al, 2011); e.g., the t IN at the coastal industrial TG site reached 100.4 kg N ha −1 yr −1 . Thus, the potential risks of heavy N deposition on sensitive terrestrial and aquatic ecosystems should be controlled to within acceptable levels by substantially reducing the amount of reactive N emitted into the atmosphere.…”

Section: Potential Effects Of N Deposition In Northern Chinamentioning

confidence: 99%

“…The mean annual p IN ranged from 4.2 to 7.1 kg N ha −1 yr −1 , with a mean of 5.9 kg N ha −1 yr −1 during the three-year period. This result is comparable to values from the North China Plain (1.3-9.6 kg N ha −1 yr −1 ), obtained as the difference between the bulk and wet-only deposition (Zhang et al, 2008a), values from Southeast China (3.4-7.6 kg N ha −1 yr −1 ), which were estimated using a water-surrogate surface (Chen et al, 2006), and values from other areas around the world, such as Singapore (5.9 kg N ha −1 yr −1 ) (He et al, 2011) and Japan (∼ 5 kg N ha −1 yr −1 ) (Endo et al, 2010), which were estimated using the inferential method.…”

Section: Contribution Of Different Pathways To Total N Depositionmentioning

confidence: 99%

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Wet and dry deposition of atmospheric nitrogen at ten sites in Northern China

et al. 2012

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Abstract. Emissions of reactive nitrogen (N) species can affect surrounding ecosystems via atmospheric deposition. However, few long-term and multi-site measurements have focused on both the wet and the dry deposition of individual N species in large areas of Northern China. Thus, the magnitude of atmospheric deposition of various N species in Northern China remains uncertain. In this study, the wet and dry atmospheric deposition of different N species was investigated during a three-year observation campaign at ten selected sites in Northern China. The results indicate that N deposition levels in Northern China were high with a ten-site, threeyear average of 60.6 kg N ha −1 yr −1 . The deposition levels showed spatial and temporal variation in the range of 28.5-100.4 kg N ha −1 yr −1 . Of the annual total deposition, 40 % was deposited via precipitation, and the remaining 60 % was comprised of dry-deposited forms. Compared with gaseous N species, particulate N species were not the major contributor of dry-deposited N; they contributed approximately 10 % to the total flux. On an annual basis, oxidized species accounted for 21 % of total N deposition, thereby implying that other forms of gaseous N, such as NH 3 , comprised a dominant portion of the total flux. The contribution of NO − 3 to N deposition was enhanced in certain urban and industrial areas, possibly due to the fossil fuse combustion. As expected, the total N deposition in Northern China was significantly larger than the values reported by national scale monitoring networks in Europe, North America and East Asia because of high rates of wet deposition and gaseous NH 3 dry deposition. Taken together, these findings show that NH 3 emissions should be abated to mitigate high N deposition and associated potential impacts on ecosystems in Northern China. The present results improve our understanding of spatio-temporal variations of magnitudes, pathways and species of deposited N in the target areas, and are important not only to inform conservation and regulatory bodies but also to initiate further detailed studies. Uncertainties among current observations underscore the need to quantify the impact of vegetation on dry deposition and to refine the simulation of dry deposition velocity.

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Section: Particulate Dry-deposited N Species Vs Composition Of Partimentioning

confidence: 99%

Section: Potential Effects Of N Deposition In Northern Chinamentioning

confidence: 99%

Section: Contribution Of Different Pathways To Total N Depositionmentioning

confidence: 99%

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Wet and dry deposition of atmospheric nitrogen at ten sites in Northern China

et al. 2012

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“…Aerosol particles are important to biological and visual air quality with clear impacts on the local community (Kunii et al, 2002;Dawud, 1998;Emmanuel, 2005;Field et al, 2009;Pengchai et al, 2009;Betha et al, 2013-this issue). Acid deposition has been shown to influence river and ocean chemistry (Sundarambal et al, 2010;He and Balasubramanian, 2009a,b;He et al, 2011). Aerosol particle radiative effects impact photochemical rates (Tang et al, 2003b).…”

Section: Interdisciplinary Nature Of Aerosol Impacts In Seamentioning

confidence: 99%

Observing and understanding the Southeast Asian aerosol system by remote sensing: An initial review and analysis for the Seven Southeast Asian Studies (7SEAS) program

Reid¹,

Hyer²,

Johnson

et al. 2013

Atmospheric Research

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299

264

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“…Approaches describing the current state of surface water bodies under a holistic perspective are crucial to assist in management strategies and measures. One of the most widespread problems of inland waters is eutrophication (Berlekamp et al 2007;He et al 2011;Chinh et al 2011;UNESCO 2012) when surface water bodies are affected by nutrient loads. Phosphor is normally the limiting nutrient in the aquatic environment (Von Sperling 1996) in that case, its increased input will lead to unwanted proliferation of algae and macrophytes, resulting in potential ecological degradation.…”

Section: Introductionmentioning

confidence: 99%

Estimation of Phosphorus Emissions in the Upper Iguazu Basin (Brazil) Using Gis and the More Model

Acosta

Kishi

Fuchs

et al. 2016

Int. Arch. Photogramm. Remote Sens. Spatial Inf. Sci.

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Commission VI, WG VI/4 KEY WORDS: Phosphorus Emissions, Water Pollution, MoRE Model, Basin Management ABSTRACT:Pollution emissions into the drainage basin have direct impact on surface water quality. These emissions result from human activities that turn into pollution loads when they reach the water bodies, as point or diffuse sources. Their pollution potential depends on the characteristics and quantity of the transported materials. The estimation of pollution loads can assist decision-making in basin management. Knowledge about the potential pollution sources allows for a prioritization of pollution control policies to achieve the desired water quality. Consequently, it helps avoiding problems such as eutrophication of water bodies. The focus of the research described in this study is related to phosphorus emissions into river basins. The study area is the upper Iguazu basin that lies in the northeast region of the State of Paraná, Brazil, covering about 2,965 km 2 and around 4 million inhabitants live concentrated on just 16% of its area.The MoRE (Modeling of Regionalized Emissions) model was used to estimate phosphorus emissions. MoRE is a model that uses empirical approaches to model processes in analytical units, capable of using spatially distributed parameters, covering both, emissions from point sources as well as non-point sources. In order to model the processes, the basin was divided into 152 analytical units with an average size of 20 km². Available data was organized in a GIS environment. Using e.g. layers of precipitation, the Digital Terrain Model from a 1:10000 scale map as well as soils and land cover, which were derived from remote sensing imagery. Further data is used, such as point pollution discharges and statistical socio-economic data. The model shows that one of the main pollution sources in the upper Iguazu basin is the domestic sewage that enters the river as point source (effluents of treatment stations) and/or as diffuse pollution, caused by failures of sanitary sewer systems or clandestine sewer discharges, accounting for about 56% of the emissions. Second significant shares of emissions come from direct runoff or groundwater, being responsible for 32% of the total emissions. Finally, agricultural erosion and industry pathways represent 12% of emissions. This study shows that MoRE is capable of producing valid emission calculation on a relatively reduced input data basis.

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Dry and wet atmospheric deposition of nitrogen and phosphorus in Singapore

Cited by 81 publications

References 48 publications

Wet and dry deposition of atmospheric nitrogen at ten sites in Northern China

Wet and dry deposition of atmospheric nitrogen at ten sites in Northern China

Observing and understanding the Southeast Asian aerosol system by remote sensing: An initial review and analysis for the Seven Southeast Asian Studies (7SEAS) program

Estimation of Phosphorus Emissions in the Upper Iguazu Basin (Brazil) Using Gis and the More Model

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