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Published in:

Volume 7 Issue 7
July-2020
eISSN: 2349-5162

Unique Identifier

JETIR2007310

Page Number

100-105

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Title

ASSESSMENT OF BC CONTENT IN THE ATMOSPHERE EMITTED AS A CHIEF CONSTITUENT OF DIESEL EXHAUST IN AND AROUND MATHIKERE AREA, BANGALORE, INDIA

ISSN

2349-5162

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"ASSESSMENT OF BC CONTENT IN THE ATMOSPHERE EMITTED AS A CHIEF CONSTITUENT OF DIESEL EXHAUST IN AND AROUND MATHIKERE AREA, BANGALORE, INDIA ", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.7, Issue 7, page no.100-105, July-2020, Available :http://www.jetir.org/papers/JETIR2007310.pdf

Abstract

One of the dominant components of light absorbing aerosols in the atmosphere that significantly alters the earth’s radiative balance is Black carbon (BC). It is known to be a large climate forcer and hence for research related to climate change, quantification of BC emissions from various sources to the earth’s atmosphere holds primary importance. It has been established that vehicular emissions in urban areas contribute to BC release as diesel particulate matter (PM) formed as an outcome of incomplete diesel combustion. In the present endeavour, a case study has been carried out in Mathikere area of Bangalore, India which is an urban location to monitor the BC concentration in the atmosphere following a direct and continuous measurement technique in order to access the diurnal variations in relation to impact of vehicular emissions during the month of June. The diurnal variation patterns showed a similar trend with a bi-peak diurnal pattern i.e. twice daily maximum in BC concentration in the morning and in the evening and these timings easily coincided with the morning and evening traffic rush hours. On most of the days, the evening peak of BC level was found to be more pronounced than the morning peak. This may be due to increased activity of heavy duty vehicles transporting various materials over long distances which usually start their journey in the evening hours and cover long distances throughout the night. Moreover, another significant reason can be that the wind speed was weaker during night-time as compared to day-time. Moreover, the current study was conducted during the month of June which experiences slight intermittent rainfall from SW monsoon usually during the evening hours and precipitation could have also led to longer BC residence time in the atmosphere after sunset. While the decrease in BC level was gradual, the recovery was almost immediate with resumption of higher traffic. Thus, the analysis suggests that the diurnal variation pattern is mainly a result of vehicular emissions. This study has practically proven that the exhaust from vehicles significantly adds to the ambient BC concentration at urban locations and hence in order to curb the negative impacts of BC particles on the environment, there is an urgent need to analyze the ecological standards of fuels and vehicles on roads and switch to alternative means of fuel with low or minimum BC emissions.

Key Words

Black carbon, vehicular emissions, BC content variations, residence time

Cite This Article

"ASSESSMENT OF BC CONTENT IN THE ATMOSPHERE EMITTED AS A CHIEF CONSTITUENT OF DIESEL EXHAUST IN AND AROUND MATHIKERE AREA, BANGALORE, INDIA ", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.7, Issue 7, page no. pp100-105, July-2020, Available at : http://www.jetir.org/papers/JETIR2007310.pdf

Publication Details

Published Paper ID: JETIR2007310
Registration ID: 235339
Published In: Volume 7 | Issue 7 | Year July-2020
DOI (Digital Object Identifier): http://doi.one/10.1729/Journal.24116
Page No: 100-105
ISSN Number: 2349-5162

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Cite This Article

"ASSESSMENT OF BC CONTENT IN THE ATMOSPHERE EMITTED AS A CHIEF CONSTITUENT OF DIESEL EXHAUST IN AND AROUND MATHIKERE AREA, BANGALORE, INDIA ", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.7, Issue 7, page no. pp100-105, July-2020, Available at : http://www.jetir.org/papers/JETIR2007310.pdf




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