THE INFLUENCE OF THE STRATOSPHERE POLAR VORTEX DYNAMICS UPON THE LOW TROPOSPHERE THERMAL STRATIFICATION
Recently, because of increase of greenhouse gases concentrations in the troposphere, there a global warming which causes stratospheric cooling and, consequently, increase of the polar vortex. In connection with this the key point is what impact the changes of stratospheric vortex have on troposphere. It is known that such reaction is strongly correlated with zonally symmetric component of dynamical fields. In this work, the reaction of the extratropical troposphere on decrease of polar stratosphere temperature which is followed by strengthening of the polar vortex, is studied with use of the spectral general circulation model with symmetric boundary conditions on the surface and the heat source given analytically. One of the most essential features of a troposphere thermal structure is a stability of a isentropic surfaces slope. In this paper, the influence of the stratosphere temperature changes on the isentropic surfaces slope is analyzed.