Summary
Two numerical experiments are performed using a nested grid regional model to study the performance of the Kuo and the Betts-Miller cumulus parameterization schemes in simulating the rainfall during an active monsoon period. Results indicate that the monsoon circulation features, such as the Somali jet and monsoon depression are better simulated with the Kuo scheme. With the Kuo scheme, predicted intensity and associated rainfall of the monsoon depression are in good agreement with the observations. Uncertainty in the adjustment parameters in the Betts-Miller scheme appears to have lead to the poor prediction of rainfall. Also, the Betts-Miller scheme showed considerable sensitivity to the convergence in the lower troposphere in the initial conditions over the Arabian Sea, leading to a prediction of a spurious intense tropical cyclone. This cyclone replaced the normal heat-low over the desert region. Rainfall distribution and its maximum along the west coast of India were predicted better with the Kuo scheme. Area-averaged convective heating rates indicated that the cumulus convection is deeper and more intense with the Kuo scheme. Also, area averaged evaporation rates far exceeded the rainfall rates with the Betts-Miller scheme while with the Kuo scheme these rates are in balance after the spinup period. Forecast erros in the zonally averaged specific humidities indicate that the model atmosphere is more humid with the Betts-Miller scheme.
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References
Anthes, R. A., 1977: A cumulus parameterization scheme utilizing a one-dimensional cloud model.Mon. Wea. Rev.,105, 207–286.
Baik, J.-J., DeMaria, M., Raman, S., 1990a: Tropical cyclone simulations with the Betts convective adjustment scheme. Part I: Model description and control simulation.Mon. Wea. Rev.,118, 513–528.
Baik, J.-J., DeMaria, M., Raman, S., 1990b: Tropical cyclone simulations with the Betts convective adjustment scheme. Part II: Sensitivity experiments.Mon. Wea. Rev.,118, 529–541.
Basu, B. K., 1990: A study on air-sea fluxes over Indian sea. In: Sikka, D. R., Singh, S. S. (eds.)Physical Processes in Atmospheric Models, New York: Wiley Eastern Edition, 179–192.
Betts, A. K., 1986: A new convective adjustment scheme. Part I: Observational and theoretical basis.Quart. J. Roy. Meteor. Soc.,112, 677–691.
Businger, J. A., Wyngaard, J. C., Izumi, Y., Bradley, E. F., 1971: Flux-profile relationship in the atmospheric surface layer.J. Atmos. Sci.,28, 181–189.
Das, S., Mohanty, U. C., Sharma, O. P., 1988: Study of Kuo-type cumulus parameterizations during different epochs of the Asian summer monsoon.Mon. Wea. Rev.,116, 715–729.
Davies, H. C., 1976: A lateral boundary formulation for multi-level prediction models.Quart. J. Roy. Meteor. Soc.,102, 405–418.
Davies, H. C., 1983: Limitations of some common lateral boundary schemes used in regional NWP models.Mon. Wea. Rev.,111, 1002–1012.
Geleyn, J.-F., 1985: On a simple, parameter-free partition between moistening and precipitation in the Kuo scheme.Mon. Wea. Rev.,113, 405–407.
Grossman, R. L., Durran, D. R., 1984: Interaction of lowlevel flow with the western Ghat Mountains and offshore convection in the summer monsoon.Mon. Wea. Rev.,112, 652–672.
Holt, T., Raman, S., 1987: A study of mean boundary-layer structures over the Arabian sea and the Bay of Bengal during active and break monsoon periods.Bound.-Layer Meteor.,38, 73–94.
Junker, N. W., Hoke, J. E., 1990: An examination of nested grid model precipitation forecasts in the presence of modearate-to-strong low-level southerly inflow.Wea. Forecasting,5, 333–344.
Krishnamurti, T. N., Cocke, S., Pasch, R., Low-Nam, S., 1983: Precipitation estimates from rainguage and statellite observations: Summer MONEX. Department of Meteorology, Florida State University, 377 pp.
Kuo, H. L., 1965: On the intensification of tropical cyclones through latent heat release by cumulus convection.J. Atmos. Sci.,22, 40–63.
Kuo, H. L., 1974: Further studies of the parameterization of the influence of cumulus convection on large-scale flow.J. Atmos. Sci.,31, 1232–1240.
Madala, R. V., Chang, S. W., Mohanty, U. C., Madan, S. C., Paliwal, R. K., Sarin, V. B., Holt, T., Raman, S., 1987: Description of the Naval Research Laboratory limited area dynamical wather prediction model. NRL Memo Rep., No. 5992, Naval Research Laboratory, Washington, D.C., 131 pp.
Molinari, J., 1983: A method for calculating the effects of deep cumulus convection in numerical models.Mon. Wea. Wea.,110, 1527–1534.
Ogura, Y., Yoshizaki, M., 1988: Numerical study of orographic-convective precipitation over the eastern Arabian Sea and the Ghat mountains during the summer monsoon.J. Atmos. Sci.,45, 2097–2122.
Puri, K., Miller, M. J., 1990: Sensitivity of ECMWF analysesforecasts of tropical cyclones to cumulus parameterization.Mon. Wea. Rev.,118, 1709–1741.
Ramachandran, G., 1972: The role of orography on wind and rainfall distribution in and around a mountain gap: Observational study.Indian J. Meteor. Geophys.,23, 41–44.
Ramakrishnan, K. P., Gopinatha Rao, 1958: Some aspects of the nondepressional rain in peninsular India during the southwest monsoon.Proc. Symp. on the Monsoon World, Indian Meteorological Department.
Rao, Y. P., 1976: Southwest Monsoon. Meteorological Monograph, Synoptic Meteorology No. 1/1976, India Meteorological Department, India, 367 pp.
Smith, R. B., Lin, Y.-L., 1983: Orographic rain on the western Ghat. In: Reiter, E. R., Baozhen, Z., Youngfu, Q. (eds.)Proc. First Sino-American Workshop on Mountain Meteorology, pp 71–94.
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Alapaty, K., Raman, S., Madala, R.V. et al. Monsoon rainfall simulations with the Kuo and Betts-Miller schemes. Meteorl. Atmos. Phys. 53, 33–49 (1994). https://doi.org/10.1007/BF01031903
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DOI: https://doi.org/10.1007/BF01031903