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Assessment of Fractionated Aerosols at a Semiarid Region over the Indo‐Gangetic Basin
Author(s) -
Singh Rohini,
Gupta Pratima,
Jangid Ashok,
Sharma Anshumala,
Kumar Ranjit
Publication year - 2019
Publication title -
clean – soil, air, water
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.444
H-Index - 66
eISSN - 1863-0669
pISSN - 1863-0650
DOI - 10.1002/clen.201800040
Subject(s) - particulates , mass concentration (chemistry) , air quality index , environmental science , atmospheric sciences , pollution , dominance (genetics) , aerosol , hydrology (agriculture) , geography , chemistry , meteorology , physics , biology , geology , geotechnical engineering , ecology , biochemistry , organic chemistry , gene
The present study examines the mass concentration of particulate matter (PM) of different sizes between January and December 2015 at Agra, a semiarid region in the Indo‐Gangetic basin. The mean mass concentrations of PM 10 and PM 2.5 are 146.9 and 54.8 μg m −3 , respectively. The observed PM 2.5 and PM 10 concentrations are considerably higher than standard values set by the World Health Organization, United States Environmental Protection Agency, and National Ambient Air Quality Standard (India). Higher concentrations of PM 10 and PM 2.5 are observed in November and January, respectively. The highest and lowest concentrations of PM 10 and PM 2.5 are measured in winter and monsoon seasons, respectively. The PM 2.5 /PM 10 mean mass concentration ratio is 0.44, indicating the dominance of coarse particles. The daily average air quality index is 107.7 for PM 2.5 and 132.8 for PM 10 . The exceedance factor (EF) for PM 10 is >1.5, indicating a critical level of PM 10 , whereas the EF for PM 2.5 is <1.5 indicating a high level of pollution load. The trajectory analysis showed the effect of long‐range‐transported particles on this region.