Is a sharp seasonal decrease in stratospheric ozone concentration that occurs over Antarctica in the spring. First detected in the late 1970s, the ozone hole continues to appear as a result of complex [..]

A severe depletion of stratospheric ozone over Antarctica that occurs each spring. The possibility exists that a hole could form over the Arctic as well. The depletion is caused by a chemical reaction [..]

Brèche dans la couche d’ozone

Decrease of ozone in the stratosphere.

circular pattern, usually located near the Antarctic, of thin atmospheric ozone, which absorbs harmful ultraviolet sunlight.

A characteristic severe depletion of stratospheric ozone that occurs each spring over the Antarctic continent. The depletion is caused by the catalytic destruction of ozone by chlorine, released from [..]

a once-natural springtime thinning in stratospheric ozone over Antarctica, but now enlarged by CFCs and other pollutants into a hole the size of the Moon.

A thinning of the ozone layer over Antarctica, which occurs each spring.

Illustrated Glossary of Organic Chemistry Ozone hole: A region in the ozone layer with low ozone concentration. Ozone holes occur naturally late each year over the Earth's Antarctic and Arctic re [..]

Thinning break in the stratospheric ozone layer. Designation of amount of such depletion as a "ozone hole" is made when detected amount of depletion exceeds fifty percent. seasonal ozone hol [..]

A thinning break in the stratospheric ozone layer. Designation of amount of such depletion as an "ozone hole" is made when the detected amount of depletion exceeds fifty percent. Sea [..]

A thinning break in the stratospheric ozone layer. Designation of amount of such depletion as an "ozone hole" is made when the detected amount of depletion exceeds fifty percent. S [..]

A thinning break in the ozone layer. Designation of amount of such depletion as an “ozone hole” is made when the detected amount of depletion exceeds 50 percent. Seasonal ozone holes have been observe [..]

A large area over a region of the Earth in the Ozone Layer where Ozone destruction has overtaken Ozone production.

A thinning of the ozone layer over Antarctica and beyond which occurs each spring.

A large area of intense stratospheric ozone depletion over the Antarctic continent that typically occurs annually between late August and early October, and generally ends in mid-November. This severe [..]

Thin place in the ozone layer located in the stratosphere high above the Earth. Stratospheric ozone thinning has been linked to destruction of stratospheric ozone by CFCs and related chemicals. The 1990 Clean Air Act has provisions to reduce and eliminate ozone destroying chemicals’ production and use. Ozone holes have been found above Antarctica a [..]

The ozone hole refers to the total amount of ozone in the atmosphere over Antarctica that was discovered to be decreasing at an alarming rate. The hole was discovered over an observation site in Antar [..]

A severe depletion of stratospheric ozone over Antarctica that occurs each spring. The possibility exists that a hole could form over the Arctic as well. The depletion is caused by a chemical reaction involving ozone and chlorine, primarily from human produced sources, cloud particles, and low temperatures.

A thinning of the ozone

A severe depletion of stratospheric ozone over Antarctica that occurs each spring. The possibility exists that a hole could form over the Arctic as well. The depletion is caused by a chemical reaction [..]

Zone of decreased ozone content that forms in the stratosphere over Antarctica each spring.

See Ozone Layer