Monthly variations in nitrogen isotopes of ammonium and nitrate in wet deposition at Guangzhou, south China

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

“…Walaszek et al (2013) also proposed that the national N deposition budget was strongly correlated with precipitation, while the variability of annual precipitation did not change the general spatial patterns of wet deposition. Using models and stable isotope methods, many studies have demonstrated that anthropogenic emissions are the main source of atmospheric N deposition (Dentener et al, 2006;Jia and Chen, 2010;Zhang et al, 2012a). Galloway et al (2008) suggested that controlling reactive N emissions from fossil fuel combustion using maximum feasible reduction would result in a decrease of reactive N creation of 25 to 7 Tg N yr −1 , which could significantly decreased atmospheric N deposition.…”

Drivers of spatial variability in urban plant and soil isotopic composition in the Los Angeles basin

“…also reported temporal patterns of deposition δ 15 N, which was most enriched in summer and least in winter Jia and Chen (2010). reported annual volume-weighted means of δ 15 N of −7.3‰ for NH…”

Isotope constraints on particulate nitrogen source and dynamics in the upper water column of the oligotrophic South China Sea

“…Such a large atmospheric deposition, in fact, is $3x our estimate of new nitrogen from N fixation and of the same magnitude as the nitrate supply from upwelling. The reported annual mean values of d 15 N for NO 3 À and NH 4 + from coastal area of South China, 300 km north of the SEATS Station, were as low as À0.7 ‰ and À7.3 ‰, respectively [Jia and Chen, 2010] [53] However, the atmospheric deposition of isotopically light bioavailable nitrogen does not explain the observed negative correlation between downward transfer efficiency and d…”

“…15 N values [Hastings et al, 2003;Jia and Chen, 2010] and high atmospheric deposition ($1000 mg N m À2 yr À1 or even higher) had been reported for Asian marginal seas [Duce et al, 2008].…”