Control of the dynamics of tropospheric ozone through the stratosphere

We consider two possible mechanisms of stratospheric control of the ozone concentration and dynamics in the troposphere. The first mechanism is implemented through the total-ozone-caused modulation of the ultraviolet radiative flux, incoming to the troposphere and initiating therein the photochemical processes. The second mechanism acts through direct transport of stratospheric ozone, which will “trigger” the photolysis and initiate these same processes of ozone generation, but now in the troposphere. Both of these mechanisms of stratospheric ozone control of the near-ground ozone concentration are shown to be apparent near Tomsk. It is noteworthy that the control via ultraviolet flux determines the amplitude modulation, and the transport from the stratosphere to the troposphere drives the temporal modulation.