Source of nitrogen in wet deposition to a rice agroecosystem at Tai lake region

Xie, Yingxin; Xiong, Zhengqin; Xing, Guangxi; Yan, Xiaoyuan; Shi, Sixue; Sun, Guoqing; Zhu, Zhaoliang

doi:10.1016/j.atmosenv.2008.03.008

Cited by 94 publications

(43 citation statements)

References 43 publications

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“…This is approximately 5-times greater than the values reported by CASTNET, EMEP and EANET (Endo et al, 2010). The estimated w IN values are also greater than those reported for most areas of China except for the Yangtze River Basin, where the average is 27 kg N ha −1 yr −1 (Xie et al, 2008;Zhao, X. et al, 2009).…”

Section: Contribution Of Different Pathways To Total N Depositioncontrasting

confidence: 37%

“…Therefore, it is important to quantify both the wet and the dry deposition of N; otherwise, an extrapolation of the total N deposition flux could yield highly uncertain estimates of potential ecological impacts. Wet deposition is readily estimated by analyzing N species in precipitation (Barile and Lapointe, 2005;Park and Lee, 2002;Xie et al, 2008;Larssen et al, 2006). However, the dry deposition of N is often omitted from observation-based flux studies because of the difficulties inherent in directly quantifying the ambient concentrations and deposition velocities of highly reactive N gases and speciated particles (Pryor et al, 1999).…”

Section: Y P Pan Et Al: Wet and Dry Deposition Of Atmospheric Nitrmentioning

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: Contribution Of Different Pathways To Total N Depositioncontrasting

confidence: 37%

Section: Y P Pan Et Al: Wet and Dry Deposition Of Atmospheric Nitrmentioning

confidence: 99%

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

et al. 2012

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“…In this study, the wet deposition of DON ranged from 0 to 7.71 kg N ha −1 yr −1 , which implied significant DON variation among different observation sites. Huang et al, 2013;Xie et al, 2008). Agricultural activity is the main source of reactive N if the ratio is larger than 1, whereas, industrial activity is the main source if the ratio is lower than 1.…”

Section: Discussionmentioning

confidence: 99%

The composition, spatial patterns, and influencing factors of atmospheric wet nitrogen deposition in Chinese terrestrial ecosystems

Zhu

Wang

et al. 2015

Science of The Total Environment

278

164

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“…(1 yr (1 , Xie et al, 2008), higher than those in rural areas in Guangdong Province ( B18 kg N, Chen and Mulder, 2007;Fang et al, 2011c). However, similar rates or even higher rates of DIN deposition than in Guangzhou have also been reported in many other cities or in agriculture areas in China.…”

Section: àmentioning

confidence: 93%

Three-decade changes in chemical composition of precipitation in Guangzhou city, southern China: has precipitation recovered from acidification following sulphur dioxide emission control?

Fang

Wang

Zhu

et al. 2013

Tellus B: Chemical and Physical Meteorology

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We examined if precipitation had recovered from acidification in Guangzhou, the third biggest city in China, and if sulphur deposition in precipitation had decreased, and to what extent if yes, following abatement strategies in sulphur dioxide (SO2) emission and energy use implemented since 2001. SO2 emissions were decreasing steadily since 2001, but a marked recovery of precipitation acidity occurred only since 2005; precipitation pH values decreased from 4.65 in 2001 to 4.34 in 2005 and then increased to 5.08 in 2010, while in the same period acid rain (pH<5.6) frequency increased from 70% to 81% and then decreased to 48%. During this period, the change in pH value and sulphate concentration more reflected the patterns of SO2 emission at provincial and national scales than at the local scale, suggesting that precipitation chemical composition was largely controlled by the emissions of pollutants from surrounding areas of the study city. Since 2001, sulphate deposition in precipitation decreased significantly (by 40%) but nitrogen deposition remained unaltered. More importantly, the current sulphur (43 kg S ha−1 yr−1 as sulphate) and nitrogen depositions (35 kg N ha−1 yr−1 as ammonium plus nitrate in 2010) were still among the highest in China. These results highlight the fact that ambient sulphur and nitrogen deposition still pose a threat to the health of both terrestrial and aquatic ecosystems. Precipitation may become more acidified in the future because the deposition of alkaline dusts containing calcium is also likely to decrease with stricter SO2 emission control policy and reduced construction activities. Additionally, we recommend that a reduction of emissions of nitrogen and chlorine bearing pollutants is urgently required for complete control on acid deposition

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Source of nitrogen in wet deposition to a rice agroecosystem at Tai lake region

Cited by 94 publications

References 43 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

The composition, spatial patterns, and influencing factors of atmospheric wet nitrogen deposition in Chinese terrestrial ecosystems

Three-decade changes in chemical composition of precipitation in Guangzhou city, southern China: has precipitation recovered from acidification following sulphur dioxide emission control?

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