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Indian Journal of Radio & Space Physics (IJRSP) >
IJRSP Vol.39 [2010] >
IJRSP Vol.39(4) [August 2010] >
| Title: | Carbonaceous aerosols at a suburban site in Indo-Gangetic plain |
| Authors: | Satsangi, Aparna
Pachauri, Tripti
Singla, Vyoma
Lakhani, Anita
Kumari, K Maharaj |
| Keywords: | Carbonaceous aerosol
Organic carbon
Black carbon
OC/BC ratio
Total suspended particulate mass (TSPM) |
| Issue Date: | Aug-2010 |
| Publisher: | CSIR |
| PACS No.: | 92.60.Mt |
| Abstract: | Carbonaceous
aerosols are emitted by combustion sources and may influence the climate by
altering the radiation balance of the atmosphere. The carbonaceous component of
the atmospheric aerosols is composed of two main fractions, viz. organic carbon
(OC) and black carbon (BC). BC is emitted from the incomplete combustion while
OC comes from the primary emission such as traffic exhaust and biomass burning
and is also formed through atmospheric chemical conversion processes.
Carbonaceous aerosols were monitored at a suburban site, Dayalbagh, Agra from
January to October 2009 in the present study. It was found that total suspended
particulate mass (TSPM) varied from 79 to 658
 g m-3 with an average of 273±179.9 g m-3. Also, daily
concentrations of OC and BC ranged from 20.4 to 147.4 g m-3 and
from 1.4 to 20.3 g m-3 with the overall average concentrations of
60.9±40.5 g m-3 and 7.5±4.6 g m-3, respectively. OC/BC
ratios indicate the emission sources of carbonaceous aerosols. When the OC/BC
ratio exceeds 2.0, it indicates that carbonaceous aerosols mainly originate
from secondary organic transformation. Daily average OC/BC ratio varied between
5.2 and 16.2 with an average of 8.1. To give an insight into the source
contribution of OC and BC, correlation coefficient was determined. The
correlation coefficient is found to be 0.79. This indicates that major fraction
of OC and BC originates from a common source. Distinct monthly variation was
observed in their concentrations. |
| Page(s): | 218-222 |
| CC License: |  CC Attribution-Noncommercial-No Derivative Works 2.5 India |
| ISSN: | 0975-105X (Online); 0367-8393 (Print) |
| Source: | IJRSP Vol.39(4) [August 2010]
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