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  • 1
    Electronic Resource
    Electronic Resource
    The Role of Radiative Transfer in Maintaining the Indian Summer Monsoon Circulation (1997)
    Springer
    Pure and applied geophysics 149 (1997), S. 601-622 
    Details
    ISSN: 1420-9136
    Keywords: Key words: Atmospheric radiative transfer, circulation, Indian summer monsoon, thermal forcing.
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Abstract —The radiative-convective feedback and land-sea thermal forcing play significant roles in maintenance of the summer monsoon circulation over the Indian sub-continent. In this study, the role of radiative transfer in maintaining the monsoon circulation is examined with numerical sensitivity experiments. For this purpose, a sixteen layer primitive equation limited area model is used to perform numerical simulations with and without atmospheric radiative transfer processes parameterized in the model. The initial values and boundary conditions for the numerical integrations of the model are derived from operational analyses of the ECMWF, UK. The results show that the radiative transfer is essential in maintaining the intensity of the low level Somali Jet as well as the upper level Tropical Easterly Jet (TEJ) over the Indian sub-continent and adjoining seas. The meridional circulation over the region is also well simulated. As a result, enough moisture transports from the warm equatorial region to simulate more realistic orographic precipitation in the windward side of the mountains along the West coast of India. Without radiative transfer processes in the model atmosphere the simulated monsoon circulation weakens, moisture transport decreases and the precipitation lessens.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s000240050043
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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
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