Sharma, S. K. and -, Saraswati and Mandal, T. K. and Saxena, Mohit (2017) Inter-annual Variation of Ambient Ammonia and Related Trace Gases in Delhi, India. Bulletin of Environmental Contamination and Toxicology, 99. pp. 281-285. ISSN 0007-4861

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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).

Item Type:	Article
Additional Information:	Copyright for this article belongs to M/s Springer Verlag.
Subjects:	Earth Sciences
Divisions:	UNSPECIFIED
Depositing User:	Users 27 not found.
Date Deposited:	29 Oct 2018 11:37
Last Modified:	29 Oct 2018 11:37
URI:	http://npl.csircentral.net/id/eprint/2755

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