1. Bin Zhou1*,Shanshan Wang2
Investigation on the atmospheric ammonia and its impacts on regional air quality over the Mega-City of Shanghai, China
Bin Zhou1*,Shanshan Wang2
1 Shanghai Key Laboratory of Atmospheric Particle Pollution and Prevention (LAP3), Department of Environmental Science & Engineering, Fudan University, Shanghai , China
2 School of Environment and Architecture, University of Shanghai for Science and Technology, Shanghai , China

2. NH3
Contribution to air pollution
SO2
NH3
NOx
H2O O3
Aerosol

3. NH3 Where is it from? Industry emission Vehicle emission 10-20%
Agriculture Poultry
80-90%

4. Experiment sites Fudan University (FD) Dian Shan Lake (DSL)
JinShan Industry Park(JSP)
DOAS
MARGA
DOAS
Shanghai, China

5. JinShan District, Shanghai
Experiment sites
Shi Hua Residentail Area
Xin Lian Chemical Industry Park（JSP）
Zhang Qiao Chemical Industry Park
Guo Mao Commercial Center
JinShan District, Shanghai

6. DOAS-NH3 Light Source: deuterium lamp Spectrum range:200-350nm
Optical Path: ~ 20-50m
Temporal resolution: 1-5min
Detected Limit: ~1ppb

7. DOAS-NH3
emitter
receiver
Shi Hua Residentail Area,FDU, Guo Mao Commercial Center

8. DOAS-NH3
Emitter/receiver
Retra-
Zhang Qiao Chemical Industry Park, Xin Lian Chemical Industry Park（JSP）

9. DOAS-NH3
Spectrum
NH3 cross section ~ 210nm
Analysis Window for NH3

10. DOAS-NH3 Fitting example NH3 atmospherical spectrum
32.1ppb NH3 fittig spcetrum

11. MARGA-NH3
Monitoring instrument for AeRosols and Gases (MARGA, Applikon Analytical B. V. Corp., Netherlands) has been applied to measure the concentration of NH3with hourly time resolution at the rural site of DSL from 1stJuly to 30thDecember 2013 and 1stMarch to 30thJune 2014

12.
Hourly average
It shows that the atmospheric NH3 levels in different locations of Shanghai generally are in the following sequence: industrial (19.6±8.2 ppb) > rural (10.4±5.0 ppb) > urban (5.4±3.3 ppb).

13. Results@Shanghai Urban site
The diurnal cycle of NH3 levels in this urban area is dependent on the traffic emissions nearby and the evolution of the atmospheric boundary layer

14. Results@Shanghai rural site
the diurnal cycle of NH3 concentration at this rural site showed a single peak about 14.9 ppb at 09:00~10:00 LT, due to the impacts of agricultural sources around

15.
Three locations, FDU, DSL and JSP, displayed the individual diurnal patterns of NH3 levels as a result of their different ammonia pollutant sources

16. NH3 and temperature
Significant linear correlations were found between NH3 concentration and ambient temperature, i.e. (a) R2= for FDU site, (b) R2= for DSL, and (c)R2= for JSP, implying that the ambient temperature was a key parameter in determining atmospheric NH3 levels for all measurement sites

18. NH3 plume at Xinlian
12/06/2015

19. 19:35
1690ppb

20. Conclusions
The diurnal NH3 in the urban atmosphere showed a typical bimodal cycle driven by the traffic emissions. A single peak was observed at the rural site, primarily driven by the temperature-favored volatilization of agricultural emissions. At the industrial site of JSP, no daily variation was observed.
The three sites showed higher NH3levels in summer and lower in winter
the sequence of atmospheric NH3 levels in different geolocations of Shanghai is industrial (19.6±8.2 ppb) > rural (10.4±5.0 ppb) > urban (5.4±3.3 ppb), which illuminates the importance of monitoring and management of industrial ammonia sources emission in Shanghai

21. Thanks