Stratospheric ozone depletion over the Arctic is not regular, unlike Antarctic ozone holes, and is determined by the dynamics of the polar vortex. Under the conditions of the strong polar vortex, in the presence of polar stratospheric clouds (PSCs), the catalytic cycles of ozone destruction occur with the appearance of solar radiation over the polar region. If the vortex breakdown occurs in late winter under the influence of planetary waves, the polar region is filled with warm, ozone-rich air masses. In the winter 2006/2007, the total melting of PSCs was observed on 2 January and occurred after the polar vortex weakening, at which values of zonal and meridional winds were less than 20 m/s during a little more than 3 h on a small section of the vortex edge. Such a local weakening of the vortex edge led to the short-term decrease of the dynamic barrier and a subsequent increase of temperature inside the vortex.

与南极臭氧空洞不同，北极平流层中的臭氧消耗是不规则的，它是由极涡的动力学决定的。在强极性涡旋的条件下，在极地平流层云（PSC）的存在下，臭氧破坏的催化循环发生，极地区域出现太阳辐射。如果涡旋破裂在冬季晚些时候在行星波的影响下发生，则极地地区将充满温暖的富含臭氧的空气团。在2006/2007年冬季，PSC的总融化于1月2日观测到，发生在极地涡旋减弱之后，在此期间，纬向和经向风的值在不到3小时的一点时间上都小于20 m / s。涡旋边缘的截面。