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  • 1
    Electronic Resource
    Electronic Resource
    Numerical Simulation of the Sensitivity of Summer Monsoon Circulation and Rainfall over India to Land Surface Processes (1998)
    Springer
    Pure and applied geophysics 152 (1998), S. 781-809 
    Details
    ISSN: 1420-9136
    Keywords: Key words: Numerical simulation, summer monsoon, circulation, land surface, parameterization.
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Abstract —The influence of soil moisture and vegetation variation on simulation of monsoon circulation and rainfall is investigated. For this purpose a simple land surface parameterization scheme is incorporated in a three-dimensional regional high resolution nested grid atmospheric model. Based on the land surface parameterization scheme, latent heat and sensible heat fluxes are explicitly estimated over the entire domain of the model. Two sensitivity studies are conducted; one with bare dry soil conditions (no latent heat flux from land surface) and the other with realistic representation of the land surface parameters such as soil moisture, vegetation cover and landuse patterns in the numerical simulation. The sensitivity of main monsoon features such as Somali jet, monsoon trough and tropical easterly jet to land surface processes are discussed.¶Results suggest the necessity of including a detailed land surface parameterization in the realistic short-range weather numerical predictions. An enhanced short-range prediction of hydrological cycle including precipitation was produced by the model, with land surface processes parameterized. This parameterization appears to simulate all the main circulation features associated with the summer monsoon in a realistic manner.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s000240050178
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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)
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  • 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
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    Paper (German National Licenses)
    Fulltext
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