Ground-Based In Situ Measurements of Near-Surface Aerosol Mass  Concentration over Anantapur: Heterogeneity in Source Impacts

B. S. K. REDDY; K. R. KUMAR; G. BALAKRISHNAIAH; K. R. GOPAL; R. R. REDDY; V. SIVAKUMAR; S. Md. ARAFATH; A. P. LINGASWAMY; S. PAVANKUMARI; K. UMADEVI; Y. N. AHAMMED

doi:10.1007/s00376-012-1234-5

Volume 30 Issue 1

Jan. 2013

Article Contents

Article > ADVANCES IN ATMOSPHERIC SCIENCES > 2013 > 30(1): 235-246

Ground-Based In Situ Measurements of Near-Surface Aerosol Mass Concentration over Anantapur: Heterogeneity in Source Impacts

1.
Aerosol and Atmospheric Research Laboratory, Department of Physics, Sri Krishnadevaraya University, Anantapur 515 003, Andhra Pradesh, India, Institute of Low Temperature Science, Hokkoido University, Sapporo 0600819, Japan;Aerosol and Atmospheric Research Laboratory, Department of Physics, Sri Krishnadevaraya University, Anantapur 515 003, Andhra Pradesh, India, School of Physics, University of KwaZulu-Natal, Durban 4000, South Africa;Institute of Environmental Engineering, National Chiao Tung University, Hsinchu, Taiwan;Aerosol and Atmospheric Research Laboratory, Department of Physics, Sri Krishnadevaraya University, Anantapur 515 003, Andhra Pradesh, India;Aerosol and Atmospheric Research Laboratory, Department of Physics, Sri Krishnadevaraya University, Anantapur 515 003, Andhra Pradesh, India;School of Physics, University of KwaZulu-Natal, Durban 4000, South Africa;Aerosol and Atmospheric Research Laboratory, Department of Physics, Sri Krishnadevaraya University, Anantapur 515 003, Andhra Pradesh, India;Aerosol and Atmospheric Research Laboratory, Department of Physics, Sri Krishnadevaraya University, Anantapur 515 003, Andhra Pradesh, India;Aerosol and Atmospheric Research Laboratory, Department of Physics, Sri Krishnadevaraya University, Anantapur 515 003, Andhra Pradesh, India;Aerosol and Atmospheric Research Laboratory, Department of Physics, Sri Krishnadevaraya University, Anantapur 515 003, Andhra Pradesh, India;Department of Physics, Yogi Vemana University, Kadapa 516003, India

doi: 10.1007/s00376-012-1234-5

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Abstract:
Surface measurements of aerosol physical properties were made at Anantapur (14.62oN, 77.65oE, 331 m a.s.l), a semiarid rural site in India, during August 2008--July 2009. Measurements included the segregated sizes of aerosolsas as well as total mass concentration and size distributions of aerosols measured at low relative humidity (RH-3, with a mean value of 34.02±9.05 μm-3 for the entire study period. A clear diurnal pattern appeared in coarse, accumulation and nucleation-mode particle concentrations, with two local maxima occurring in early morning and late evening hours. The concentration of coarse-mode particles was high during the summer season, with a maximum concentration of 11.81±0.98 μm-3 in the month of April, whereas accumulation-mode concentration was observed to be high in the winter period contributed >68% to the total aerosol mass concentration. Accumulation aerosol mass fraction, Af (= Ma/Mt) was highest during winter (mean value of Af ～0.80) and lowest (Af ～0.64) during the monsoon season. The regression analysis shows that both Reff and Rm are dependent on coarse-mode aerosols. The relationship between the simultaneous measurements of daily mean aerosol optical depth at 500 nm (AOD500) and PM2.5 mass concentration ([PM2.5]) shows that surface-level aerosol mass concentration increases with the increase in columnar aerosol optical depth over the observation period.
- aerosols mass concentration,
- size distribution,
- effective radius,
- backward trajectories
References

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