Structure of the Indian southwesterly pre-monsoon and monsoon boundary layers: Observations and numerical simulation

Raman, S and Templeman, B and Templeman, S and Holt, T and Murthy, AB and Singh, MP and Agarwaal, P and Nigam, S and Prabhu, A and Ameenullah, S (1990) Structure of the Indian southwesterly pre-monsoon and monsoon boundary layers: Observations and numerical simulation. In: INTERNATIONAL CONF ON TROPICAL MICROMETEOROLOGY AND AIR POLLUTION, FEB 15-19, 1988 , NEW DELHI, INDIA.

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Abstract

Characteristics of pre-monsoon and monsoon boundary layer structure and turbulence were studied in New Delhi and Bangalore, India during the summer of 1987. Micrometeorological towers were installed and instrumented at these locations to provide mean and turbulent surface layer measurements, while information on the vertical structure of the atmosphere was obtained using miniradiosondes. Thermal structures of the pre-monsoon and monsoon boundary layers were quite distinct. The daytime, pre-monsoon boundary layer observed over New Delhi was much deeper than that of the monsoon boundary layer observed over Bangalore and at times was characterized by multiple inversions. Surface, turbulent sensible heat fluxes at both sites were approximately the same (235 and 200 Wm−2 for New Delhi and Bangalore, respectively). Diurnal variations in the monsoon boundary layer at Bangalore were more regular compared to those under pre-monsoon conditions at New Delhi. One-dimensional numerical simulations of the pre-monsoon boundary layer using a turbulent energy closure scheme show good agreement with observations.

Item Type:	Conference Paper
Publisher:	Elsevier Science
Additional Information:	Copyright of this article belongs to Elsevier Science.
Department/Centre:	Division of Mechanical Sciences > Centre for Atmospheric & Oceanic Sciences
Date Deposited:	11 Jan 2011 09:30
Last Modified:	11 Jan 2011 09:30
URI:	http://eprints.iisc.ac.in/id/eprint/34945

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