Advances in Geosciences www.adv-geosci.net 1680-7340 1680-7359 25 Precipitation: Measurement, Climatology, Remote Sensing, and Modeling (EGU Session 2009) 2010 10.5194/adgeo-25-71-2010 http://www.adv-geosci.net/25/71/2010/ http://www.adv-geosci.net/25/71/2010/adgeo-25-71-2010.html http://www.adv-geosci.net/25/71/2010/adgeo-25-71-2010.pdf 71 77 2010-03-16 Heat and energy fluxes in the convective cell behind a cold front S. Ivanov svvivo@te.net.ua J. Palamarchuk Department of Meteorology and Forecasting, Environmental University, 65016 Odessa, Ukraine High resolution model simulations are used to estimate heat fluxes and energy conversion in the convective cell developing behind a cold front. It is found that the model is able to simulate rapid temperature changes in the low troposphere up to 1 °C for a time period of a few minutes due to latent heat release as well as horizontal acceleration up to 5 m/s at the top of convective circulation. Numerical experiments have also shown sensitivity of fine resolution simulations to parameterizations used for the description of a large-scale flow. Austin, P. M.: Relation between measured radar reflectivity and surface rainfall, Mon. Weather Rev., 115, 1053–1070, 1987. Bechtold, P., Bazile, E., Guichard, F., Mascard, P., and Richard, E.: A mass flux convection scheme for regional and global models, Q. J. Roy. Meteor. Soc., 127, 869–886, 2001. Browning, K. A.: Observational synthesis of mesoscale structures within an explosively developing cyclone, Q. J. Roy. Meteor. Soc., 131, 603–623, 2005. Fuelberg, H. E. and Scoggings, J. R.: Kinetic energy budgets during the life cycle of intense convective activity, Mon. Weather Rev., 106, 637–653, 1978. Grell, G. A., Dudhia, J., and Stauffer, D. R.: A description of the fifth-generation Penn State/NCAR Mesoscale model (MM5), NCAR Technical Note, 398, 117~pp., 1994. Ivanov, S. and Palamarchuk, J.: Fine-scale precipitation structure of a cold front and the problem of the representativeness error, Adv. Geosci., 10, 3–8, 2007. Janjic, Z. I.: The step-mountain eta coordinate model: Further development of the convection, viscous sublayer, and turbulent closure schemes, Mon. Weather Rev., 122, 927–945, 1994. Kuell, V., Gassman, A., and Bott, A.: Towards a new hybrid cumulus parameterization scheme for use in non-hydrostatic weather prediction models, Q. J. Roy. Meteor. Soc., 133, 479–490, 2007. May P.: Thermodynamic and vertical velocity structure of two gust fronts observed with a wind profiler/RASS during MCTEX, Mon. Weather Rev., 127, 1796–1807, 1998. Pierce, C. E., Hardaker, P. J., Collier, C. G., and Haggett, C. M.: GANDOLF: A system for generating automated nowcasts of convective precipitation, Meteorol. Appl., 7, 341–360, 2000. Robertson, F. R. and Smith, P. J.: The kinetic energy budgets of two severe storm producing extratropical cyclones, Mon. Weather Rev., 108, 127–143, 1980. Weusthoff, T., Hauf, T.: The life cycle of convective-shower cells under post-frontal conditions, Q. J. Roy. Meteor. Soc.., 134, 841–857, 2008.