Sentences with phrase «ozone hole area»

The 2015 Antarctic ozone hole area was larger and formed later than in recent years, said scientists from NASA and the National Oceanic and Atmospheric Administration (NOAA).

Not exact matches

Using satellites, ground - based instruments, and ozone - measuring weather balloons, they showed that since 2000, the September hole shrunk by 4 million square kilometers — an area bigger than India.

In early October 2006, the Antarctic stratosphere was the coldest it has been since 1979, and the ozone hole loomed bigger than ever, spanning an area larger than North America.

2012: Total ozone reached 124 DU on Oct. 1 and 136 DU on Oct. 5 with the hole covering 8.2 million square miles (equivalent to the area of North America).

The team found that the September ozone hole has shrunk by more than 4 million square kilometers — about half the area of the contiguous United States — since 2000, when ozone depletion was at its peak.

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

Japan's Meteorological Agency announced last week that the ozone hole over Antarctica has increased 13-fold over the past 10 years, and now covers a total area of 17 million square kilometres.

Southern Chile is the nearest densely populated area to the Antarctic ozone hole, and the animals were obviously suffering from overexposure to ultraviolet light streaming through the ozone hole — at least, according to the press.

Compared to the 1991 - 2014 period, the ozone hole's average area this year was the fourth largest.

Their measurements, focusing on a time period in September each year — during which time the colder temperatures in the atmosphere promote the reactions that destroy ozone so that the hole is opening up — show that since 2000, the hole has shrunk by 1.7 million square miles, an area more than half the size of the continental United States.

Scientists use the word hole as a metaphor for the area in which ozone concentrations drop below the historical threshold of 220 Dobson Units.

The photos allow Romps, a climate scientist who specializes in clouds, to measure how fast the clouds rise, which in turn can shed light on a wide range of areas, ranging from lightning rates to extreme precipitation to the ozone hole.

On Oct. 2, 2015, the ozone hole expanded to its peak of 28.2 million square kilometers (10.9 million square miles), an area larger than the continent of North America.

Now scientists at MIT along with others have found that since 2000 the ozone hole has actually shrunk by an area half the size of the contiguous United States, although the process is also heavily affected by variables such as volcanic eruptions from year to year.

6 Ice age — time in the past when continental glaciers covered large parts of Earth's surface Global warming — a gradual increase in the temperature of Earth's atmosphere Greenhouse gas — Gases in the atmosphere, such as carbon dioxide, that trap solar energy Ozone hole — a large area of reduced ozone concentration in the stratosphere, found over Antarctica Chlorofluorocarbon — chlorine compounds that are the main cause of ozone depletion KEY Ozone hole — a large area of reduced ozone concentration in the stratosphere, found over Antarctica Chlorofluorocarbon — chlorine compounds that are the main cause of ozone depletion KEY ozone concentration in the stratosphere, found over Antarctica Chlorofluorocarbon — chlorine compounds that are the main cause of ozone depletion KEY ozone depletion KEY TERMS

Using a computer model, they showed that weather conditions would have lowered the amount of ozone over Antarctica anyways, and that the big hole was a result of winds from the tropics carrying less ozone to the area than in the years before.