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Short-term changes in the aerosol characteristics at Kharagpur (22°19′N, 87°19′E) during winter

Short-term changes in the aerosol characteristics at Kharagpur (22°19′N, 87°19′E) during winter

Authors :
Prabha R. Nair
P. K. Kunhikrishnan
K. Susan George
Marina Aloysius
Mannil Mohan
K. Parameswaran
Denny P. Alappattu
Source :
Journal of Atmospheric and Solar-Terrestrial Physics. 71:1771-1783
Publication Year :
2009
Publisher :
Elsevier BV, 2009.

Abstract

In-situ measurements of number density, size distribution, and mass loading of near-surface aerosols were carried out at Kharagpur, a site on the eastern part of Indo-Gangetic Plains during the winter month of December 2004. The data have been used to investigate wintertime characteristics of aerosols and their effects on the occurrence of haze. The aerosol number density is found to be of the order of 109 m−3 and mass loading is ~265±70 μg m−3 (5–8 times that reported from south Indian sites). The diurnal patterns and day-to-day variations in aerosol number density and mass loading are closely associated with atmospheric boundary layer height. During haze events, the number density of submicron particles is found to be 2–5 times higher than that during non-hazy period. This could be attributed to the enhanced concentration of anthropogenic aerosols, low atmospheric boundary layer height/ventilation coefficient and airflow convergence.

Details

ISSN :
13646826
Volume :
71
Database :
OpenAIRE
Journal :
Journal of Atmospheric and Solar-Terrestrial Physics
Accession number :
edsair.doi...........50db3308d84dd4a12125b17eed530ddf
Full Text :
https://doi.org/10.1016/j.jastp.2009.06.010