WebJul 5, 2024 · In the mid-1970s, atmospheric research suggested the ozone layer, which absorbs most of the sun’s ultraviolet radiation, might be depleted because of industrial … WebOzone depletion consists of two related events observed since the late 1970s: a steady lowering of about four percent in the total amount of ozone in Earth's atmosphere, and a much larger springtime …
Global warming caused by chlorofluorocarbons, not carbon …
WebJul 5, 2024 · Lu’s discovery builds on previous studies of the CRE-initiated ozone-depleting mechanism that he and his colleagues originally proposed about two decades ago. “The present discovery calls for further careful studies of ozone depletion, UV radiation change, increased cancer risks, and other negative effects on health and … WebWhen an Oxygen molecule absorbs a photon of light with a wavelength shorter than 200 nanometers (1 billionth of a meter) the energy splits the molecule into two Oxygen atoms. One of these atoms can react with another Oxygen molecule to form an Ozone molecule. Up to 98% of the sun's high-energy ultraviolet light (UV-B and UV-C) are absorbed by ... maurice rheims wikipedia
Discovery Reveals Large, Year-Round Ozone Hole Over Tropics
WebApr 18, 2024 · Rowland, a professor of chemistry at the University of California, Irvine, and Molina, a postdoctoral fellow in Rowland’s laboratory, had shown that chlorofluorocarbons—CFCs—could destroy ozone, a molecule made up of three oxygen atoms, O 3, in Earth’s stratosphere. That stratospheric ozone absorbs ultraviolet … WebSep 15, 2024 · Around 99 per cent of ozone-depleting substances have been phased out and the protective layer above Earth is being replenished. The Antarctic ozone hole is expected to close by the 2060s, while other regions will return to pre-1980s values even earlier. Every year, an estimated two million people are saved from skin cancer and there … WebMay 30, 2013 · “But in contrast, CRE theory says cosmic rays – energy particles originating in space – play the dominant role in breaking down ozone-depleting molecules and then ozone.” Lu’s theory has been confirmed by ongoing observations of cosmic ray, CFC, ozone and stratospheric temperature data over several 11-year solar cycles. maurice richard bande annonce