OPEN ACCESS

Articles online

Seasonal Variability of Atmospheric Aerosol Parameters over Greater Noida Using Ground Sunphotometer Observations

Category: Articles

Volume: 14 | Issue: 3 | Pages: 608-622
DOI: 10.4209/aaqr.2013.06.0219
PDF | RIS | BibTeX

Manish Sharma1, Dimitris G. Kaskaoutis2, Ramesh P. Singh 3, Sachchidanand Singh4

  • 1 Research and Technology Development Centre (RTDC), Sharda University, Greater Noida-NCR, 203201, India
  • 2 Department of Physics, School of Natural Sciences, Shiv Nadar University, Dadri-NCR, 203207, India
  • 3 School of Earth and Environmental Sciences, Schmid College of Science and Technology, Chapman University, One University Drive, Orange, CA 92866, USA
  • 4 Radio & Atmospheric Sciences Division, CSIR-National Physical Laboratory, New Delhi - 110012, India

Abstract

Atmospheric aerosols over northern India are subject of significant temporal and spatial variability and many studies have been carried out to investigate their physico-chemical and optical properties. The present work emphasizes on examining the aerosol optical properties and types over Greater Noida, Delhi region, using ground-based sun photometer data during the period 2010–2012. The analysis reveals a relatively high mean aerosol optical depth at 500 nm (AOD500 = 0.82 ± 0.39), associated with a moderate Angstrom exponent α440–870 of 0.95 ± 0.37. Both parameters, exhibit significant daily, monthly and seasonal variability with higher values of AOD500 during post-monsoon (0.98 ± 0.50) and winter (0.87 ± 0.35) seasons associated with high α values (> 1.1) suggesting significant urban and biomass-burning contribution. On monthly basis, the highest AOD is found during July and November and the lowest one in the transition months of March and September. The aerosol-type discrimination via the relationship AOD vs. α shows a clear dominance of urban/industrial and biomass-burning aerosols during post-monsoon and winter in fractions of 74.5% and 72%, respectively, while aerosols of desert-dust characteristics were most frequent in pre-monsoon (41.7%) and monsoon (21%) seasons. In general, the analysis shows a rather well-mixed aerosol type under very turbid atmosphere, which is associated with the long range transport of pollutants through the westerly winds from the Thar desert and biomass burning in the western parts of India.

Keywords

Atmospheric aerosols Sunphotometer Aerosol optical depth Dust storm AERONET Dust Biomass burning


Related Article

Aerosol Optical Thickness Measurements on Tsunami Day at a Continental Station, Mysore

K. E. Ganesh , T. K. Umesh, B. Narasimhamurthy
Volume: 9 | Issue: 1 | Pages: 94-104
DOI: 10.4209/aaqr.2008.08.0035
PDF

Site Specific Aerosol Optical Thickness Characteristics over Mysore

K E Ganesh , T K Umesh, B Narasimhamurthy
Volume: 8 | Issue: 3 | Pages: 295-307
DOI: 10.4209/aaqr.2008.07.0016
PDF

Critical Emissions from the Largest On-Road Transport Network in South Asia

Saroj Kumar Sahu , Gufran Beig, Neha Parkhi
Volume: 14 | Issue: 1 | Pages: 135-144
DOI: 10.4209/aaqr.2013.04.0137
PDF

Ambient Air Quality during Diwali Festival over Kolkata – A Mega-City in India

A. Chatterjee , C. Sarkar, A. Adak, U. Mukherjee, S.K. Ghosh, S. Raha
Volume: 13 | Issue: 3 | Pages: 1133-1144
DOI: 10.4209/aaqr.2012.03.0062
PDF
;