2.1 The Stratospheric Ozone Layer

Ozone is created by natural processes in the earth’s atmosphere.

90% of earth’s ozone layer is primarily responsible for blocking out nearly 99% of the sun’s high intensity ultraviolet (UV) radiation.

Fun Fact: The highest concentrations of ozone at the North Pole occur during the northern spring (March and April) with the opposite occurring at the South Pole where the lowest concentrations of ozone are recorded during the southern spring (September and October). In North America, ozone concentrations peak during the spring and slowly begin to fall over the course of the summer. Ozone concentrations reach their lowest point in the fall and begin to rise during the winter months.