Saxena, Mohit and Sharma, Sudhir Kumar and Mandal, Tuhin Kumar and Singh, Sachchidanand and Saud, Trailokya (2014) Source apportionment of particulates by receptor models over Bay of Bengal during ICARB campaign. Atmospheric Pollution Research, 4 (5). 729 -740 . ISSN 1309-1042

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Aerosol Radiation Budget (ICARB) in the pre-monsoon (March-April 2006) and winter (December-January 2008-09) seasons. Positive matrix factorization (PMF) was applied to identify sources of ambient particulate matter using daily chemical composition data collected in the pre-monsoon (total suspended particles, TSP) and winter season (particles with a diameter < 10 mu m, PM10). Sea salt (SS), secondary aerosol (SA), Si-dust, fossil fuel combustion (FFC), biomass burning (BB) sources have been identified in both seasons, however their relative contributions were different. The combined contribution of Si-dust, secondary aerosol and fossil fuel combustion, constitute. similar to 67% of particulate matter in pre-monsoon, whereas, secondary aerosols and biomass burning were the major contributors (63.2%) to particulate matter in winter. The identified sources effectively predict the measured particulate concentration in the pre-monsoon (r(2) = 0.74) and winter season (r(2) = 0.82). Another receptor model, principal component analysis (PCA) was done to increase the plausibility of the results obtained by PMF. PCA resulted in the identification of the sources that were comparable to the PMF outputs. PCA of TSP in the pre-monsoon season resulted in the extraction of three components (crustal dust + secondary aerosol, biomass burning, fossil fuel combustion + industrial emissions) that explained the 83% of the variance in the data. Similarly, in winter season, PCA resulted in the extraction of four components (biomass burning + secondary aerosol, industrial emission, crustal dust, sea salt) that explained the 86% of the variance of the data.

Item Type: Article
Uncontrolled Keywords: Source apportionment, positive matrix factorization, principal component analysis, particulate matter, Bay of Bengal
Subjects: Physics
Depositing User: Dr. Rajpal Walke
Date Deposited: 05 Nov 2015 10:21
Last Modified: 05 Nov 2015 10:21

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