Journal of Earth System Science

, Volume 117, Supplement 1, pp 421–427 | Cite as

Temporal characteristics of aerosol physical properties at Visakhapatnam on the east coast of India during ICARB — Signatures of transport onto Bay of Bengal

  • K. Niranjan
  • V. Sreekanth
  • B. L. Madhavan
  • T. Anjana Devi
  • B. Spandana
Article

Abstract

Realizing the importance of aerosol physical properties at the adjoining continental and coastal locations in the airmass pathways onto the oceanic region, extensive measurements of aerosol physical properties were made at Visakhapatnam (17.7°N, 83.3°E), an eastern coastal location in peninsular India during the ICARB period. The temporal variations of aerosol optical depth, near surface aerosol mass size distributions and BC mass concentrations show significantly higher aerosol optical depth and near surface mass concentrations during the first and last weeks of April 2007. The mean BC mass fraction in the fine mode aerosol was around 11%. The aerosol back scatter profiles derived from Micro Pulse Lidar indicate a clear airmass subsidence on the days with higher aerosol optical depths and near surface mass fraction. A comparison of the temporal variation of the aerosol properties at Visakhapatnam with the MODIS derived aerosol optical depth along the cruise locations indicates a resemblance in the temporal variation suggesting that the aerosol transport from the eastern coastal regions of peninsular India could significantly affect the aerosol optical properties at the near coastal oceanic regions and that the affect significantly reduced at the farther regions.

Keywords

Aerosols atmospheric sciences experiments data analysis 

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Copyright information

© Indian Academy of Sciences 2008

Authors and Affiliations

  • K. Niranjan
    • 1
  • V. Sreekanth
    • 1
  • B. L. Madhavan
    • 1
  • T. Anjana Devi
    • 1
  • B. Spandana
    • 1
  1. 1.Department of PhysicsAndhra UniversityVisakhapatnamIndia

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