Ozone–oxygen cycle Ozone–oxygen cycle The ozone–oxygen cycle is the process by which ozone is continually regenerated in Earth's stratosphere, converting ultraviolet radiation (UV) into heat. In 1930 Sydney Chapman resolved the chemistry involved. The process is commonly called the Chapman cycle by atmospheric scientists. Most of the ozone production occurs in the tropical upper stratosphere and mesosphere. The total mass of ozone produced per day over the globe is about 400 million metric tons. The global mass of ozone is relatively constant at about 3 billion metric tons, meaning the Sun produces about 12% of the ozone layer each day. And if
Burning Like the Midnight Sun the Midnight Sun" has received some of the most positive reviews of any album in the band's career. Jeff Eibel, writing for the Spin Control column in the "Chicago Sun-Times", called The Choir's latest release "a late-career triumph," and remarked that "Midnight Sun" was the band's "second exceptional album in a row, and its best since 1990's landmark "Circle Slide"." "Christianity Today"′s Andrew Greer highlighted the band's ability to create "smooth musical clarity to contrast the murky exploration of everyday faith," while "The Phantom Tollbooth"′s Derek Walker called "Midnight Sun" a "sonic delight" and The Choir's "most cohesive, melodic and