Comparative measurement of CO_(2),CH_(4)and CO at two traffic interjunctions having inflated vehicular flow in Delhi  

作　　者：Komal Daya Soni Khem Singh Shankar G.Aggarwal 

机构地区：[1]CSIR-National Physical Laboratory,Dr.K.S.Krishnan Marg,New Delhi 110012,India [2]Academy of Scientific&Innovative Research(AcSIR),Ghaziabad 201002,India

出　　处：《Journal of Environmental Sciences》2024年第7期314-329,共16页环境科学学报（英文版）

基　　金：Council of Scientific and Industrial Research(CSIR)for providing the fellowship under CSIR-SRF scheme(P81101)。

摘　　要：Vehicular emissions are considered one of the major anthropogenic sources of greenhouse gases and poor air quality in metropolitan cities.This study aims to see the correlation of CO_(2),CH_(4),and CO through monitoring over a period from December 2020 to October 2021 covering three seasons’winter,summer,and monsoon at two different traffic locations of Delhi having different traffic volumes,road patterns,and traffic management.The annual average morning concentration of CO_(2),CH_(4)and CO was found(533±105),(7.3±3.1),(10.7±3.0)ppm at Najafgarh and(480±70),(5.2±1.8),(7.8±2.8)ppm at Rajendra Place,respectively.A relationship between concentration of all three gases and meteorological parameters such as temperature,humidity,wind speed and wind direction has also been investigated using Pearson correlation coefficient and pollution rose diagram.A comparable pattern in concentration was observed for all three gases in spatial(location)and temporal(diurnal)distribution.The concentration trend of CO_(2)in different seasons is winter>summer>monsoon,while in the case of CH_(4)winter=summer>monsoon but not any seasonal trend was noted in CO case.It is observed that CO_(2)has a good relation with CO(a tracer for vehicular emission)in terms of diurnal variation,whereas,CH_(4)does not represent a relation with CO and CO_(2)diurnally,suggesting that vehicles are the source of CO_(2)but not much contributing to other greenhouse gases like CH_(4).

关 键 词：Vehicular emission Greenhouse gases Harmful pollutants Meteorological parameters 

分 类 号：X831[环境科学与工程—环境工程]