Sentences with phrase «stratospheric ozone hole»

The same model generating the global mean temperature in this figure is also used to simulate the response of tropospheric winds to the Antarctic stratospheric ozone hole, for example.

More than 20 years after the Montreal Protocol agreement limited human emissions of ozone - depleting substances, the question remains: Is the stratospheric ozone hole over Antarctica recovering?

The springtime stratospheric ozone hole & surface ozone also have an impact, and the combination of soot & surface ozone would exceed the impact from greenhouse gases (soot deposition alone is on par with greenhouse gases in the boreal thaw).

Portions of the Great Barrier Reef spend part of each year under the edges of a stratospheric ozone hole that forms above Antarctica.

Not exact matches

In September, the ozone hole is at its largest because the cold winter months coupled with the returning daylight permit stratospheric cloud formations that do the most damage to the ozone layer.

An increase of stratospheric temperature over Antarctica would decrease the ozone hole's area.

While the ozone hole is a stratospheric phenomenon, it can also stir winds in the lower levels of the atmosphere, which in turn affect Antarctic sea ice.

While the ozone hole is a stratospheric phenomenon, it can also stir winds in the lower levels of the atmosphere, which in turn affect

The 2006 Antarctic ozone hole is experiencing some of the strongest stratospheric ozone depletion seen in recent years.

There is nothing «natural» about these extremes of weather over the last 2 years, or about the unprecedented ozone hole in the Arctic last year (troposphere warming from greenhouse gases caused stratospheric cooling to below threshold temperature for polar stratospheric cloud generation and ozone destruction).

Hank, You might be interested to read the link below which references the 2006 Antarctic ozone hole exhibiting some of the strongest stratospheric ozone depletion seen in recent years.

Here are a few of the problems that need to be worked out: There's the issue of the effect of the aerosols on stratospheric chemistry (think how unanticipated the chemistry of the Ozone Hole was), and the question of just where the aerosols would go once injected.

Stratospheric circulation slowly shifts the contours of the ozone hole over the course of the day (like winds shift the location of clouds).

Since its emergence in the 1980s, the Antarctic ozone hole, the near - complete loss of lower - stratospheric ozone, has occurred every year.

In the Antarctic, essentially complete removal of lower - stratospheric ozone currently results in an ozone hole every year, whereas in the Arctic, ozone loss is highly variable and has until now been much more limited.

Ozone holes are caused by chemical reactions that take place primarily on the surface of polar stratospheric clouds, ice particles, or liquid droplets, which form at high altitudes in the extreme cold of the polar regions.

The scientific goal is to determine and interpret trends in global stratospheric ozone, the Antarctic ozone hole, and global atmospheric ozone depleting substances; to investigate these trends for signs of recovery of the ozone layer and evaluate implications for climate change; and to study the efficacy of newly proposed substitutes for currently used ozone - depleting substances.

Sudden stratospheric warming can significantly alter temperature - dependent chemical reactions of ozone and other reactive gases in the stratosphere and affect the development of such features as «ozone holes.»

The southward shift in the tropospheric jet extends to the surface of the Earth and is linked dynamically to the ozone hole induced strengthening of the Southern Hemisphere stratospheric polar vortex.

Stratospheric ozone science: To elucidate the geographical extent of, and mechanisms responsible for, ozone depletion in the «ozone hole» region and to study dilution effects and possible heterogeneous chemistry even outside of the polar regions due to sulphate aerosols.

A good example is the consensus of chemistry models that projected a slow decline in stratospheric ozone levels in the 1980s, but did not predict the emergence of the Antarctic ozone hole because they all lacked the equations that describe the chemistry that occurs on the surface of ice crystals in cold polar vortex conditions — an «unknown unknown» of the time.

Ozone recovery in the tropical stratosphere is expected to be faster and the recovery of the polar ozone hole is expected to be slower because of the CO2 - induced cooling of the stratosphere (and increase the number of polar stratospheric cloOzone recovery in the tropical stratosphere is expected to be faster and the recovery of the polar ozone hole is expected to be slower because of the CO2 - induced cooling of the stratosphere (and increase the number of polar stratospheric cloozone hole is expected to be slower because of the CO2 - induced cooling of the stratosphere (and increase the number of polar stratospheric clouds).

In an idealized three - dimensional numerical simulation of the Northern Hemisphere winter stratosphere, doubling the CO2 concentration leads to the formation of an Arctic ozone hole comparable to that observed over Antarctica, with nearly 100 % local depletion of lower - stratospheric ozone.