Articles | Volume 18, issue 22
Atmos. Chem. Phys., 18, 16385–16398, 2018
https://doi.org/10.5194/acp-18-16385-2018
Atmos. Chem. Phys., 18, 16385–16398, 2018
https://doi.org/10.5194/acp-18-16385-2018

Research article 19 Nov 2018

Research article | 19 Nov 2018

The vertical variability of ammonia in urban Beijing, China

Yangyang Zhang et al.

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Cited articles

Ashbaugh, L. L., Malm, W. C., and Sadeh, W. Z.: A residence time probability analysis of sulfur concentrations at Grand Canyon National Park, Atmos. Environ., 19, 1263–1270, https://doi.org/10.1016/0004-6981(85)90256-2, 1985. 
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Bari, A., Ferraro, V., Wilson, L. R., Luttinger, D., and Husain, L.: Measurements of gaseous HONO, HNO3, SO2, HCl, NH3, particulate sulfate and PM2.5 in New York, NY, Atmos. Environ., 37, 2825–2835, https://doi.org/10.1016/S1352-2310(03)00199-7, 2003. 
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Chang, Y., Liu, X., Deng, C., Dore, A. J., and Zhuang, G.: Source apportionment of atmospheric ammonia before, during, and after the 2014 APEC summit in Beijing using stable nitrogen isotope signatures, Atmos. Chem. Phys., 16, 11635–11647, https://doi.org/10.5194/acp-16-11635-2016, 2016. 
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Our study is the first to continually monitor the vertical concentration profile of NH3 in urban Beijing. Weekly concentrations averaged 13.3 ± 4.8 μg m−3. The highest NH3 concentrations were always observed between 32 and 63 m, decreasing toward the surface and toward higher altitudes. Our results demonstrate a NH3 rich atmosphere in urban Beijing, from the ground to at least 320 m. Regional transport from the south (intensive agricultural regions) contributed high NH3 concentrations in Beijing.
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