Sharma, S. K. and Datta, A. and Saud, T. and Mandal, T. K. and Ahammed, Y. N. and Arya , B. C. and Tiwari, M. K. (2009) Study on concentration of ambient NH3 and interactions with some other ambient trace gases. Environmental Monitoring and Assessment , 162 (1-4). pp. 225-235. ISSN 1573-2959

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Abstract

We present diurnal variation of ambient ammonia (NH3) in relation with other trace gases (O3, CO, NO, NO2 , and SO2) and meteorological parameters at an urban site of Delhi during winter period. For the first time, ambient ammonia (NH3) wasmonitored very precisely and continuously using ammonia analyzer, which operates on chemiluminescence method. NH3 estimation efficiency of the chemiluminescence method (>90%) is much higher than the conventional chemical trapping method (reproducibility 4.5%). Ambient NH3 concentration reaches its maxima (46.17 ppb) at night and minimum during midday. Result reveals that the ambient ammonia (NH3) concentration is positively correlated with ambient NO (r2 = 0.79) andNO2 (r2 = 0.91) mixing ratio and negatively correlated with ambient temperature (r2 = −0.32). Wind direction and wind speed indicates that the nearby (∼500 mNW) agricultural fields may be major source ofambient NH3 at the observational site.

Item Type:	Article
Additional Information:	Copyright for this article belongs to M/s Springer Verlag.
Subjects:	Biophysics
Divisions:	UNSPECIFIED
Depositing User:	Ms Neetu Chandra
Date Deposited:	13 Jul 2012 12:09
Last Modified:	13 Jul 2012 12:09
URI:	http://npl.csircentral.net/id/eprint/338

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