Feedback between convective heating and dynamics and movements of tropical cyclones
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It is shown that there exists a mechanism that can cause north-northwest movement of tropical cyclones in addition to already recognised mechanisms such as steering current and beta drift. This mechanism depends on the interaction between organised convection and dynamics. In the initial stages of formation of a cyclone, it is assumed that the hydrodynamic instabilities result in an incipient disturbance that organises some convection giving rise to a heat source. The atmospheric response to a localized heat source located off the equator in the northern hemisphere produces a low level vorticity field with a maximum in the northwest sector of the original heat source. If the ‘Ekman-CISK’ which depends on the low level vorticity, was the dominating mechanism for moisture convergence, the location of the heat source would move to the new location of vorticity maximum. A repetition of this process would result in a northwest movement of the heat source and hence that of the cyclone. The movement of a tropical vortex under the influence of this mechanism which depends on asymmetries created by linear dispersion of Rossby waves is first illustrated using a linear model. It is then demonstrated that this process also enhances the motion of a tropical vortex in a nonlinear model. Importance of this feedback and the resulting movements of a tropical vortex in determining the actual track of a cyclone and in bogusing an initial vortex for prediction models are illustrated.
- Anthes, R. A., 1982: Tropical cyclones: Their evolution, structure and effects.Meteor. Monographs, Amer. Meteor. Soc.,19/41, 208 pp.
- Anthes, R. A., Hoke, J., 1975: The effect of horizontal divergence and latitudinal variation of the Coriolis parameter on the drift of a model hurricane.Mon. Wea. Rev.,103, 757–763.
- Arakawa, A., Lamb, V. R., 1981: A potential enstrophy and energy conserving scheme for the shallow water equation.Mon. Wea. Rev.,109, 18–36.
- Black, P. G., 1977: Some aspects of tropical storm structures revealed by hand held camera photographs from space. Skylab Explores the Earth, NASA SP-380, Govt. Printing Office, Washington, DC, 417–462.
- Black, P. G., 1983: Tropical storm structure revealed by stereoscopic photographs from Skylab.Adv. Space Res.,2, 115–124.
- Chan, J. C. L., 1984: An observational study of the physical processes responsible for tropical cyclone motion.J. Atmos. Sci.,41, 1036–1048.
- Chan, J. C. L., Williams, R. T., 1987: Analytical and numerical studies of the beta effect in tropical cyclone motion. Part I: Zero mean flow.J. Atmos. Sci.,44, 1257–1265.
- Demaria, M., 1985: Tropical cyclone motion in a nondivergent barotropic model.Mon. Wea. Rev.,113, 1199–1210.
- Dong, K., Neumann, C. J., 1986: Relationship between tropical cyclone motion and environmental geostrophic flows.Mon. Wea. Rev.,114, 115–122.
- Eliassen, A., 1971: On the Ekman layer of a circular vortex.J. Meteor. Soc. Japan,49, 784–789.
- Elsberry, R. L., Frank, W. M., Holland, G. J., Farrell, J. D., Southern, L., 1987:Global view of Tropical Cyclones, Ch. 4. Arlington: Office of Naval Research, VA, 22217, pp. 185.
- Fiorino, M., Elsberry, R. L., 1989: Some aspects of vortex structure related to tropical cyclone motion.J. Atmos. Sci.,46, 975–990.
- Geisler, J. E., Stevens, D. E., 1982: On the vertical structure of damped steady circulation in the tropics.Quart. J. Roy. Meteor. Soc.,108, 87–93.
- Gill, A. E., 1980: Some simple solutions for heat induced tropical circulation.Quart. J. Roy. Meteor. Soc.,106, 447–462.
- Goswami, B. N., 1987: A mechanism for the west-northwest movement of monsoon depressions.Nature,326, 376–378.
- Gray, W. M., 1982: Tropical cyclone genesis and intensification. In: Bengtsson, L., Lighthill, J. (eds.)Intense Atmospheric Vortices, Berlin, New York: Springer, pp. 3–20.
- Heckley, W. A., Gill, A. E., 1984: Some simple analytical solutions to the problem of forced equatorial long waves.Quart. J. Roy. Meteor. Soc.,110, 203–217.
- Holland, G. J., 1983: Tropical cyclone motion: Environmental interaction plus a beta effect.J. Atmos. Sci.,40, 328–342.
- Holland, G. J., 1984: Tropical cyclones motion: A comparison of theory and observation.J. Atmos. Sci.,41, 68–75.
- Holland, G. J., 1984: On the climatology and structure of tropical cyclones in the Australian Southwest Pacific Region II Hurricanes.Aust. Met. Mag.,32, 17–31.
- Holland, G. J., 1987: Mature structure and structure change, Ch. 2. In: Elsberry, R. L. (ed.),A Global View of Tropical Cyclones, Arlington, Office of Naval Research, VA22217, pp. 13–52.
- Holland, G. J., Lander, M., 1993: The meandering nature of tropical cyclone tracks.J. Atmos. Sci.,50, 1254–1266.
- Keenan, T. D., 1982: A diagnostic study of tropical cyclone forecasting in Australia.Aust. Met. Mag.,30, 69–80.
- Kitade, T., 1981: A numerical study of the vortex motion with barotropic models.J. Meteor. Soc., Japan,59, 801–807.
- Miller, M. J., Pearce, R. P., 1974: A three dimensional primitive equation model of cumulonimbus convection.Quart. J. Roy. Meteor. Soc.,100, 133–154.
- Neuman, S., Boyd, J. G., 1962: Hurricane movement and variable location of high intensity spot in wall cloud radar echo.Mon. Wea. Rev.,90, 371–374.
- Ooyama, K., 1964: A dynamic model for the study of tropical cyclone development.Geofis. Int.,4, 187–198.
- Peng, M. S., Williams, R. T., 1990: Dynamics of vortex asymmetries and their influence on vortex motion on a β plane.J. Atmos. Sci.,47, 1987–2003.
- Riehl, H., 1979:Climate and Weather in the Tropics. London, New York: Academic Press, pp. 611.
- Shapiro, R., 1970: Smoothing, filtering and boundary effects.Rev. Geophys. Space Phys.,8, 359–387.
- Shapiro, L., 1983: The asymmetric boundary layer flow under a translating hurricane.J. Atmos. Sci.,40, 1984–1988.
- Shapiro, L. J., Ooyama, K. V., 1990: Barotropic vortex evolution on a beta plane.J. Atmos. Sci.,47, 170–187.
- Shapiro, L. J., 1992: Hurricane vortex motion and evolution in a three layer model.J. Atmos. Sci.,49, 140–153.
- Shoemaker, D. N., 1989: Relationships between tropical cyclone convection and the radial extent of damaging winds. Colorado State University, Department of Atmospheric Sciences, Paper No. 457, 109 pp.
- Sikka, D. R., 1977: Some aspects of the life history, structure and movement of monsoon depressions.Pure Appl. Geophys.,115, 1501–1529.
- Smith, R. K., Ulrich, W., 1990: An analytical theory of tropical cyclone motion using a barotropic model.J. Atmos. Sci.,47, 1973–1986.
- Willoughby, H. E., Marks, F. D., Feinberg, R. J., 1984: Stationary and moving convective bands in hurricanes.J. Atmos. Sci.,41, 3189–3211.
- Willoughby, H. E., 1988: Linear motion of a shallow water barotropic vortex.J. Atmos. Sci.,45, 1906–1928.
- Willoughby, H. E., 1990: Temporal changes of the primary circulation in tropical cyclones.J. Atmos. Sci.,47, 242–264.
- Willoughby, H. E., 1992: Linear motion of a shallow water barotropic vortex as an initial value problem.J. Atmos. Sci.,49, 2015–2031.
- Wu, C. C., Emanuel, K. A., 1993: Interaction of a baroclinic vortex with background shear; Application to hurricane movement.J. Atmos. Sci.,50, 62–76.
- Feedback between convective heating and dynamics and movements of tropical cyclones
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