Effect of three different boundary-layer parameterisations in a regional atmospheric model on the simulation of summer monsoon circulation |
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| Authors: | K V J Potty U C Mohanty S Raman |
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| Institution: | (1) Centre for Atmospheric Sciences, Indian Institute of Technology, New Delhi, 110 016, India;(2) Department of Marine, Earth and Atmospheric Sciences, North Carolina State University, Raleigh, NC, 27695-8208, U.S.A |
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| Abstract: | Bulk, first-order and turbulent kinetic energy (TKE) closure schemes are used to parameterise the boundary-layer physics in a high resolution, limited area model. The model was used to simulate the summer monsoon circulations over India. The domain selected included the monsoon trough over northern India, a region of mesoscale convection. A monsoon depression was present at the time of the simulation. The results indicate that the TKE closure scheme combined with the Monin–Obukhov surface-layer similarity relation provided the best 48-hour simulation of the circulation and the rainfall associated with the monsoon depression. |
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| Keywords: | Indian summer monsoon circulation Monsoon depression Planetary boundary layer Bulk method First order closure scheme TKE closure scheme |
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