Journal of Earth System Science

, Volume 117, Supplement 1, pp 273–280 | Cite as

Airborne measurements of submicron aerosols across the coastline at Bhubaneswar during ICARB

  • P. Murugavel
  • V. Gopalakrishnan
  • Vimlesh Pant
  • A. K. Kamra
Article
First Online:
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Abstract

Airborne measurements of the number concentration and size distribution of aerosols from 13 to 700 nm diameter have been made at four vertical levels across a coastline at Bhubaneswar (20°25′N, 85°83′E) during the Integrated Campaign for Aerosols, gases and Radiation Budget (ICARB) programme conducted in March–April 2006. The measurements made during the constant-level flights at 0.5, 1, 2 and 3 km altitude levels extend ∼100 km over land and ∼150km over ocean. Aerosol number concentrations vary from 2200 to 4500 cm−3 at 0.5 km level but are almost constant at ∼ 6000 cm−3 and ∼ 800 cm−3 at 2 and 3 km levels, respectively. At 1km level, aerosol number concentration shows a peak of 18,070 cm−3 around the coastline. Most of the aerosol size distribution curves at 0.5 km and 1 km levels are monomodal with a maxima at 110nm diameter which shifts to 70 nm diameter at 2 and 3 km levels. However, at the peak at 1 km level, number concentration has a bimodal distribution with an additional maximum appearing in nucleation mode. It is proposed that this maxima in nucleation mode at 1 km level may be due to the formation and transport of new particles from coastal regions.

Keywords

Atmospheric aerosols coastal aerosols new particle formation nucleation mode aerosols atmospheric sciences 
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Copyright information

© Indian Academy of Sciences 2008

Authors and Affiliations

  • P. Murugavel
    • 1
  • V. Gopalakrishnan
    • 1
  • Vimlesh Pant
    • 1
  • A. K. Kamra
    • 1
  1. 1.Indian Institute of Tropical MeteorologyPuneIndia

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