Inter-annual Variation of Ambient Ammonia and Related Trace Gases in Delhi, India

Mrz 20, 2017 | Ambient Air Pollution Research, Atmospheric Research, References and publications

Place of publication

Bulletin of Environmental Contamination and Toxicology; August 2017, Volume 99, Issue 2, pp 281–285

Field

Atmospheric Research; Ambient Air Pollution Measurement

Keywords

Trace gases; Ammonia; Meteorological parameters; Annual variation; NO; NO2; O3, nitrogen oxide; nitric oxide; nitrogen dioxide

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Instruments used for NO, NO₂ and O₃ measurements

ECO PHYSICS CLD 88 p combined with ECO PHYISCS PLC 860

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Instruments used for NH₃ mesasurements

ECO PHYSICS CLD 88 CYp

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Abstract

In this study, ambient NH3, NO, NO2, CO and SO2 were measured continuously from February, 2008, to December, 2016. The annual average mixing ratios (mole/mole) of NH3, NO, NO2, CO and SO2 were 17.8 ± 3.4 ppb; 21.2 ± 2.3 ppb, 18.1 ± 3.2 ppb; 1.7 ± 0.3 ppm and 2.0 ± 0.3 ppb, respectively. All the trace gases (NH3, NO, NO2, CO and SO2) showed significant annual variation during the study. A significant increasing trend in mixing ratios of ambient NH3 and NO2 were observed at the observational site of Delhi, whereas, increasing trend were recorded in case of NO, CO and NO2 mixing ratios. The results emphasized that traffic could be one of the significant sources of ambient NH3 at the urban site of Delhi, as illustrated by positive correlations of NH3 with traffic related co-pollutants (NO and CO).

DOI

https://doi.org/10.1007/s00128-017-2058-x

Link

https://link.springer.com/article/10.1007/s00128-017-2058-x

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