Ozone depletion - Wikipedia
Ozone depletion and the ozone hole have generated worldwide concern over increased cancer risks and other negative effects. The ozone layer prevents harmful wavelengths of ultraviolet (UVB) light from passing through the Earth's atmosphere.
Nasa Ozone Watch: Ozone hole facts
A catalytic reaction allows a single chlorine atom to destroy thousands of ozone molecules. Bromine is involved in a second catalytic reaction with chlorine that contributes a large fraction of ozone loss.
What are the reactions involved for ozone layer depletion in …
In the stratosphere, ozone is a product of the action of UV radiations on dioxygen as: (i) O 2 (g) U V − − → O (g) + O (g) (i i) O 2 (g) + O (g) U V ↔ O 3 (g) Reaction (ii) indicates the dynamic equilibrium existing between the production and decomposition of ozone molecules.
The ozone hole appears over Antarctica because meteorological and chemical conditions unique to this region increase the effectiveness of ozone destruction by reactive halogen gases (see Q8).
NASA Ozone Watch: Latest status of ozone
4 days ago · What is the ozone hole? Each year for the past few decades during the Southern Hemisphere spring, chemical reactions involving chlorine and bromine cause ozone in the southern polar region to be destroyed rapidly and severely. …
The Atmosphere: Tracking the Ongoing Recovery of Earth’s Ozone Hole
Oct 16, 2019 · But, as NASA atmospheric scientist Nathaniel Livesey explains, today, thanks to the phase-out of CFCs, Earth’s ozone hole is in recovery. He says the turnaround provides a great example of what humans can do when they work together to solve a …
EXPERT REACTION: The ozone hole's core may not be recovering
Nov 22, 2023 · Despite public perception, the Antarctic ozone hole has been remarkably massive and long-lived over the past four years, University of Otago researchers believe chlorofluorocarbons (CFCs) aren’t the only things to blame.
Other reactions. Global ozone abundances are controlled by many reactions that both produce and destroy ozone (see Q2). Chlorine and bromine catalytic reactions are but one group of ozone destruction reactions. Reactive hydrogen and reactive nitrogen gases, for example, are involved in other cat - alytic ozone-destruction cycles that also occur ...
Chemists poke holes in ozone theory | Nature
Sep 26, 2007 · Long-lived chloride compounds from anthropogenic emissions of chlorofluorocarbons (CFCs) are the main cause of worrying seasonal ozone losses in both hemispheres. In 1985, researchers...
Discovery reveals large, year-round ozone hole over tropics
Jul 5, 2022 · Scientist reveal a large, all-season ozone hole in the lower stratosphere over the tropics comparable in depth to that of the well-known springtime Antarctic hole, but roughly seven times greater...