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Concentrations of surface O₃, NO₂ and CO during winter seasons at a semi-arid region – Agra, India

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Title Concentrations of surface O₃, NO₂ and CO during winter seasons at a semi-arid region – Agra, India
 
Creator Saini, Renuka
Satsangi, G S
Taneja, Ajay
 
Subject Ozone
Precursor gases
NO2
CO
Photochemical production
Semi-arid region
 
Description 121-130
Surface measurements of O₃ (ozone) and its precursor gases such as NO₂ and CO have been made over an urban site of Agra (semi-arid region). Ozone and NO₂ show diurnal variations to an urban site during winter season. The overall increase of ozone is attributed to the increase in NO₂, CO and other precursor’s emissions by different sources in the proximity of both the sites, i.e. St. John’s College (SJC) and Dayalbagh. The average concentration of ozone was found to be 27.3 ppbv and it ranges from 1.2 to 69.0 ppbv, whereas the average concentration of NO₂ and CO were 66.3 ± 7.0 ppbv and 710.3 ± 159.4 ppbv, respectively. The coefficient of determination of regression curve between O₃ and NO₂ were r = 0.50 at SJC and r = 0.68 at Dayalbagh, whereas correlation between O₃ and CO were r = 0.75 at SJC and r = 0.50 at Dayalbagh, indicating positive correlation. Air samples from the two different locations of Agra city have indicated that the concentrations of ozone and CO were within the permissible limits but NO₂ concentration was above the limit.
 
Date 2008-12-05T05:52:01Z
2008-12-05T05:52:01Z
2-04
 
Type Article
 
Identifier 0367-8393
http://hdl.handle.net/123456789/2490
 
Language en_US
 
Publisher CSIR
 
Source IJRSP Vol.37(2) [April 2008]