Inter-annual Variation of Ambient Ammonia and Related Trace Gases in Delhi, India
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
Instruments used for NO, NO₂ and O₃ measurements
ECO PHYSICS CLD 88 p combined with ECO PHYISCS PLC 860
Instruments used for NH₃ mesasurements
ECO PHYSICS CLD 88 CYp
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