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NISCAIR ONLINE PERIODICALS REPOSITORY (NOPR) >
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Research Journals >
Indian Journal of Radio & Space Physics (IJRSP) >
IJRSP Vol.40 [2011] >
IJRSP Vol.40(2) [April 2011] >
| Title: | Characterization of PM, PM10 and PM2.5 mass concentrations at a tropical semi-arid station in Anantapur, India |
| Authors: | Balakrishnaiah, G
Kumar, K Raghavendra
Reddy, B Suresh Kumar
Gopal, K Rama
Reddy, R R
Reddy, L S S
Narasimhulu, K
Ahammed, Y Nazeer
Balanarayana, C
Moorthy, K Krishna
Babu, S Suresh |
| Keywords: | Particulate matter (PM)
Fine particles
Coarse particles
Meteorological parameters
Aerosol optical depth (AOD) |
| Issue Date: | Apr-2011 |
| Publisher: | NISCAIR-CSIR, India |
| PACS No.: | 92.60.Mt; 92.60.Sz |
| Abstract: | The particulate matter (PM), PM10
and PM2.5 concentrations are estimated from regular measurements of
size segregated as well as total mass concentration of near surface composite
aerosols, using a ten-channel Quartz Crystal Microbalance (QCM) Cascade
Impactor in a tropical semi-arid station, Anantapur, India for the period May
2006 – April 2007. The monthly variations of PM, PM10 and PM2.5
and season-wise shares of PM10 and PM2.5 to PM have been
computed. The highest contribution of PM10 to PM has been noticed
during local summer season, while the maximum share of PM2.5 to PM has
been noticed during the winter season. The average values of PM, PM10
and PM2.5 mass concentrations have been found to be 21.21±1.21,
18.7±1.06 and 17.02±1.28  g m-3, respectively. Seasonally, the
concentration has been highest in winter (24.62±3.53, 22.07±2.56, 21.29±2.31)
and lowest in monsoon (18.12±1.62, 16.46±1.82, 14.47±1.57) for PM, PM10
and PM2.5, respectively. The back trajectory cluster analysis revealed
that the aerosol loading has been significantly higher in fine mode during
periods of continental air mass (winter) but when the winds shift to marine
(monsoon), the loading became higher due to major contribution of sea salt
aerosols, particularly in the coarse mode. PM10 and PM2.5 concentrations
has been highly correlated with PM and inversely correlated with local wind
speed. The results of this analysis underlined the importance of local emission
sources, mostly from anthropogenic, which are responsible for the high PM10
and PM2.5 concentration levels observed during this one year - sampling
period. |
| Page(s): | 95-104 |
| CC License: |  CC Attribution-Noncommercial-No Derivative Works 2.5 India |
| ISSN: | 0975-105X (Online); 0367-8393 (Print) |
| Source: | IJRSP Vol.40(2) [April 2011]
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