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  • Planetary boundary layer  (2)
  • Fluxes  (1)
  • Key words: PBL parameterisation, TKE closure, Indian summer monsoon, monsoon depression, medium-range forecast.  (1)
  • 1
    Electronic Resource
    Electronic Resource
    Influence of the Planetary Boundary Layer Physics on Medium-range Prediction of Monsoon over India (1999)
    Springer
    Pure and applied geophysics 155 (1999), S. 33-55 
    Details
    ISSN: 1420-9136
    Keywords: Key words: PBL parameterisation, TKE closure, Indian summer monsoon, monsoon depression, medium-range forecast.
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Abstract —The present study emphasizes the importance of proper representation of boundary layer physics in a general circulation model. The Turbulent Kinetic Energy (TKE) closure scheme incorpo rates important processes of the Planetary Boundary Layer (PBL) compared to a simplistic first-order closure model. Hence the model which has the TKE closure scheme is capable of simulating important weather systems associated with summer monsoon, such as monsoon depressions and lows that form over the Indian subcontinent quite well compared to the first-order closure model. The present study indicates better performance of the global model with the TKE scheme in the prediction of the monsoon circulation, including the tracks of the depressions over the Indian subcontinent. Medium-range weather prediction has also improved with the use of the TKE closure. However further studies are necessary to improve the forecast, with emphasis on boundary layer processes.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s000240050253
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    A Study On Atmospheric Boundary-Layer Characteristics At Anand, India Using Lsp Experimental Data Sets (2000)
    Springer
    Boundary layer meteorology 96 (2000), S. 393-419 
    Details
    ISSN: 1573-1472
    Keywords: Fluxes ; Land surface processes ; Planetary boundary layer ; Turbulent kinetic energy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Abstract An attempt is made to study the planetary boundary layer (PBL) characteristics during the winter period at Anand (22.4°N, 72.6°E), a semi-arid region, which is located in the western part of India. A one-dimensional turbulent kinetic energy (TKE) closure model is used for the study. The structure of the PBL,which consists of profiles of zonal and meridional components of wind,potential temperature and specific humidity, is simulated. A one-dimensional soil heat and moisture transport parameterization scheme is incorporated for the accurate representation of the energy exchange processes at the soil-atmosphere interface. The diurnal variation of fluxes of sensible heat, latent heat, shortwave radiation, net radiation and soil flux, soil temperature at different depths, Richardson number and TKE at the height of the constant flux layer is studied. The model predictions are compared with the available observations obtained from a special Land Surface Processes (LSP) experiment.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1002699522932
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    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Effect of three different boundary-layer parameterisations in a regional atmospheric model on the simulation of summer monsoon circulation (1997)
    Springer
    Boundary layer meteorology 84 (1997), S. 363-381 
    Details
    ISSN: 1573-1472
    Keywords: Indian summer monsoon circulation ; Monsoon depression ; Planetary boundary layer ; Bulk method ; First order closure scheme ; TKE closure scheme
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: 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.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1000402013655
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
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