Atmospheric boundary layer observations on the East Coast at Kalpakkam using Doppler mini-sodar during different seasons

Authors

  • A. BAGAVATH SINGH Radiological Safety Division, Indira Gandhi Centre for Atomic Research, Kalpakkam, India
  • R. VENKATESAN Radiological Safety Division, Indira Gandhi Centre for Atomic Research, Kalpakkam, India
  • C. V. SRINIVAS Radiological Safety Division, Indira Gandhi Centre for Atomic Research, Kalpakkam, India
  • K. M. SOMAYAJI Radiological Safety Division, Indira Gandhi Centre for Atomic Research, Kalpakkam, India

DOI:

https://doi.org/10.54302/mausam.v56i1.898

Keywords:

ARMEX, Mini-sodar, Sea breeze, Thermal internal boundary layer, Nocturnal boundary layer, Turbulent kinetic energy, Tethersonde

Abstract

A phased array Doppler Mini-Sodar has been installed at Anupuram near Kalpakkam nuclear site during the Coastal Atmospheric Boundary Layer Experiments (CABLE) carried out on the east coast of India. Mini-Sodar was used to measure the wind profile and investigate the coastal boundary layer development due to land-sea breeze circulation for the study of coastal dispersion of pollutants. The atmospheric boundary layer, its variability during SW (August 13, 14 : ARMEX I and September 3, 7, 11, 14) and pre-monsoon period (April 27, 28 : ARMEX II) 2003 has been studied. Large wind direction change and  high vertical velocity variance were observed  during the onset of sea breeze. The Thermal Internal Boundary Layer (TIBL) height has been found to increase progressively with season: summer - 170 m, SW monsoon - 210 m and NE monsoon - 325 m  whereas the Nocturnal Boundary Layer (NBL)        height decrease progressively during the corresponding period: summer - 370 m, SW monsoon - 340 m and NE monsoon - 210 m.

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Published

01-01-2005

How to Cite

[1]
A. B. SINGH, R. VENKATESAN, C. V. SRINIVAS, and K. M. SOMAYAJI, “Atmospheric boundary layer observations on the East Coast at Kalpakkam using Doppler mini-sodar during different seasons”, MAUSAM, vol. 56, no. 1, pp. 233–242, Jan. 2005.

Issue

Vol. 56 No. 1 (2005): MAUSAM

Section

Research Papers

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