Physics of auroral phenomena : proceedings of the 34th Annual seminar, Apatity, 01 - 04 March, 2011 / [ed.: A. G. Yahnin, A. A. Mochalov]. - Апатиты : Издательство Кольского научного центра РАН, 2011. - 231 с. : ил.

I. V. Mingalev et al. convergence zones with different configurations. Calculations were made for various cases in which the initial forms of the intratropical convergence zone were different and contained convexities with distinct shapes. It was found the specific initial shapes of the intratropical convergence zone convexity which, during the period for about one day, bring forth a pair of cyclonic and anticyclonic vortexes. The common feature of these initial shapes is that the left crook of the convexity is sharp and the right crook of the convexity is sharp too, with the left and right ends of the convexity being at the same latitudes. At the initial moment, the convexity may be deviated either in the north direction or in the south direction. In both cases, a cyclone-anticyclone pair arose in the vicinity of the initial intratropical convergence zone. The cyclonic vortex arose whose center is close to the southern edge of the initial intratropical convergence zone and the anticyclonic vortex arose whose center is close to the northern edge of the initial intratropical convergence zone. The radii of these large-scale vortexes are about 400 km. The horizontal wind velocity in these vortexes achieved a value of 20 m/s during the period of twenty seven hours. Acknowledgments. This work was partly supported by the RFBR grant 10-01-00451. References Belotserkovskii, O.M, I.V. Mingalev, V.S. Mingalev, O.V. Mingalev, and A.M. Oparin, Mechanism of the appearance of a large-scale vortex in the troposphere above a nonuniformly heated surface, Doklady Earth Sciences, 411(8), 1284-1288, 2006. Belotserkovskii, O.M, I.V. Mingalev, V.S. Mingalev, O.V. Mingalev, A.M. Oparin, and V.M. Chechetkin, Formation of large-scale vortices in shear flow of the lower atmosphere of the Earth in the region of tropical latitudes, Cosmic Research, 47(6), 466-479, 2009. Mingalev, I. V. and V.S. Mingalev, The global circulation model of the lower and middle atmosphere of the Earth with a given temperature distribution, Mathematical Modeling, 17(5), 24-40, 2005 (in Russian). Mingalev, I.V, V.S. Mingalev, and G.I. Mingaleva, Numerical simulation of the global distributions of the horizontal and vertical wind in the middle atmosphere using a given neutral gas temperature field, J. Atmos. Solar- Terr. Phys, 69(4/5), 552-568, 2007. Mingalev, I.V, N.M. Astafieva, K.G. Orlov, V.S. Mingalev, and O.V. Mingalev, Time-dependent modeling of the initial stage of the formation of cyclones in the intratropical convergence zone of the northern hemisphere, In: “Physics o fAuroral Phenomena. ”Proc. XXXIII Annual Seminar, Apatity, pp. 182-185, 2011. 192