The antarctic ozone hole in the southern hemisphere is known for its yearly variations. Oct 12, 1990 a gaping hole in earths protective ozone layer has again opened over antarctica, and scientists reported yesterday that the depletion of ozone there seemed to be nearly as severe as it was in the. Satellite instruments monitor the ozone layer, and we use their data to create the images that depict the amount of ozone. Satellite instruments monitor the ozone layer, and we use their data to. The antarctic ozone hole, a rapid depletion of ozone that occurs each spring over antarctica, first formed more than 30 years ago. After thinning at alarming rates in the 1980s and 90s, the ozone layer over antarctica is starting to recover. This video presents these complicated processes with simple to understand animations. A gaping hole in earths protective ozone layer has again opened over antarctica, and scientists reported yesterday that the depletion of ozone there seemed to be nearly as severe as it.
The ozone hole over antarctica nears its record youtube. This icon serves as a link to download the essential accessibility assistive. In 2015, the annual antarctic ozone hole area was larger and formed later than in recent years. Mini ozone hole opens over arctic and, yes, thats kinda. Researchers say the hole is also a particularly unusual shape this. Snapshot of the antarctic ozone hole 2010 hd video flickr. Since then, scientists have relied on instrumentation developed by goddard to keep track of the environmental phenomenon, which in the 1990s prompted a worldwide ban on. Ozone hole formation over south pole, september 1 to december. Toms data showing the ozone hole over antarctica 820. Apr 30, 2020 holes over antarctica form seasonally.
While arctic ozone holes are more rare, this is not the first time one has formed. Antarctica ozone hole is healing the weather channel. Antarctic ozone hole is the smallest its been since 1988. Significant reduction in ozone concentration and consequent thinning of the ozone layer was evidenced mainly over antarctica back in 1984. Using measurements from the copernicus sentinel5p satellite, the animation shows changes in the ozone hole over antarctica between september and october 2018. In this time, we have not witnessed an ozone hole formation of this size over the arctic. Ppt ozone depletion powerpoint presentation free to. An ozone hole has developed over the arctic, a rare occurrence that. This video is public domain and can be downloaded at. Its smaller because its hotter, not because it is repaired. Higher temperatures over antarctica this year shrank the hole in the ozone layer to the smallest its been since 1988. If you liked this video, subscribe to the nasa goddard youtube. May 14, 2020 view the latest status of the ozone layer over the antarctic, with a focus on the ozone hole.
The ozone hole in antarctica cool antarctica, pictures. By summertime, stratospheric air from lower latitudes is able to penetrate the polar latitudes, and thereby replenish the ozone layer above antarctica. This series of satellite images shows the ozone hole on the day of its maximum depth each year from 1979 through 2019. Hole in the ozone layer over antarctica in 1985, a british. These images from the total ozone mapping spectrometer toms show the progressive depletion of ozone over antarctica from 1979 to 1999. It breaks down the vortex, resulting in the dispersal of ozonepoor air to midlatitudes and allowing ozonerich air from outside the vortex to flow over antarctica. Click any map image to bring up a new page with a highresolution map. Antarctica is the highest, driest, coldest, and windiest continent despite containing 70 percent of the worlds freshwater, much of antarctica is a desert, with the annual snow accumulation over much of east antarctica being the equivalent of less than two inches of rainfall. The ozone hole over antarctica is healing according to a study published in the journal science. Ozone australian antarctic division australia in antarctica. This ozone hole has extended to cover an area as large as 10. This video gives a brief overview of the ozone hole over antarctica. The hole in earths ozone layer that forms over antarctica each september. Losing part of the ozone layer over antarctica is an annual phenomenon, but for the past nine years, the ozone hole has been consistently smaller than the recordbreaking 27.
The ozone hole forms each year when there is a sharp decline currently up to 60% in the total ozone over most of antarctica for a period of about two months during september and october. This visualization is a plot of an isosurface of ozone volume mixing ratio at 5 x 107 parts per million. Every year, nasa and noaa track the hole in the ozone layer over antarctica as it. The missing data region over the south pole is due to the inability of the toms instrument to measure data during the polar night. Nasa a season in the life of the antarctic ozone hole. The huge hole in earths protective ozone layer reached its maximum this year in september, and this year. For this reason, scientists and environmentalists the world over were extremely concerned to discover a large hole in the ozone over antarctica. During the antarctic winter something special happens to the antarctic weather. Ozone hole reopens over antarctica the new york times. By late september, the ozone loss peaks and the ozone hole over the antarctic reaches it maximum size. A nonyoutube version is available using the download and source. The ozone hole occurs during the antarctic spring, from september to early december, as strong westerly wind start to circulate around the continent and create an. The ozone hole developed from emissions that used to be in a lot of our products in the past and are no longer. Ozone hole over antarctica is smallest its been since 1988.
The antarctic ozone hole reached its annual peak size on sept. Unusual winds drive a small 2019 ozone hole youtube. The ozone hole over the antarctic is gradually filling up, haigh says. Mini ozone hole opens over arctic and, yes, thats kinda weird.
In 1985, a british scientist working in antarctica discovered a 40 percent loss in the ozone layer over the continent. What is an ozone hole and causes and effects of ozone. The antarctic ozone hole is formed each year in the southern hemisphere spring septembernovember when there is a sharp decline currently up to 60% in the total ozone over most of antarctica. Subsequent studies allowed to observe its dynamics, increasing its size and a similar situation, although less pronounced over the arctic. Abnormal weather patterns in the upper atmosphere over antarctica dramatically limited ozone depletion in september and october, resulting in the smallest ozone hole observed since 1982, nasa and noaa scientists reported today. The ozone layer in antarctica oceanwide expeditions. If you know basics of ozone and ozone hole, then you can skip video to 3. Every year, the ozone hole over antarctica reaches an annual maximum. Antarctica is home to our usual hole in the ozone layer.
A hole in the ozone layer that appeared above antarctica in the 1980s has shrunk thanks to a worldwide ban on damaging chemicals, nasa has. Almost 30 years after the montreal protocol, the ozone hole over antarctica is becoming smaller. So, thats the good news and the atmosphere responded as we expected. Ozone hole over antarctica shrinks to smallest peak since. Manmade chlorofluorocarbon cfc compounds, chlorine, and bromine are attributed with creating the hole in the ozone. Generally ozone levels are at their summer maximum. Sep 18, 2019 the ozone hole that opens every year over the antarctic is on course to be the smallest in three decades, scientists have said. Ozone hole over antarctica hits record size cbc news.
Here is a nasa movie of the ozone hole over antarctica from july through december. The ozone hole is a depletion of ozone gas o3 in the stratosphere above. Far above earths surface, the ozone layer helps to protect life from harmful ultraviolet radiation. Nasa finds the first direct proof of ozone recovery daily. Hence, there is a seasonal cycle to the ozone hole over antarctica with the lowest ozone levels recorded in late september and early october. Click any map image to bring up a new page with a highresolution image. Nov 21, 2015 in 2015, the annual antarctic ozone hole area was larger and formed later than in recent years. Firstly, strong circular winds form that blow around the whole continent, this is known as the polar vortex this isolates the air over antarctica from the rest. What is it telling us about the time of year when the area of ozone depletion is greatest.
This video can be downloaded for free at nasas scientific visualization studio. The ozone hole over the antarctic is beginning to fill up. Strong winds, called the stratospheric polar vortex, around the south pole play an important role in the depletion the ozone at this time of the year. The warmer climate has caused the chemicals that damage it to be less concentrated. The huge hole in earths protective ozone layer reached its maximum this year in september, and this year nasa said it was 7. View the latest status of the ozone layer over the antarctic, with a focus on the ozone hole. Nov 03, 2017 the huge hole in earths protective ozone layer reached its maximum this year in september, and this year nasa said it was 7. Ozone hole over antarctica is larger than north america cbs. Stratospheric realtime dataset science on a sphere. The ozone hole over antarctica is primarily caused by humanmade chemicals including chlorine and bromide that migrate to the stratosphere. Apr 06, 2020 mini ozone hole opens over arctic and, yes, thats kinda weird.
During the cold dark antarctic winter, stratospheric ice clouds pscs, polar stratospheric clouds form when temperatures drop below 78c. Recordbreaking ozone hole has formed over the arctic. This animation shows the daily ozone levels over the arctic from 9 march 2020 until 1. The antarctic ozone hole is an area of the antarctic stratosphere in which the recent since about 1975 ozone levels have dropped to as low as 33% of their pre1975 values. In a recent study the ozone hole found over your head during an antarctica expedition was found to be showing evidence of a decrease in size based on 15 years of ground and satellite observations with the size of the ozone hole in 2014 less severe compared to the 19952005 average. There is, however, still a small area over the south pole with ozone levels below 250 du, which is over 30% down on the normal for the time. Jul 01, 2016 almost 30 years after the montreal protocol, the ozone hole over antarctica is becoming smaller. View the latest status of the ozone layer over the arctic. The ozone hole was first detected over antarctica when scientists compared the amount of ozone found in the early 1980s with measurements dating back to 1956. May 14, 2020 view the latest status of the ozone layer over the arctic. The ozone hole over antarctica grew to the size of north america this year the fifth largest on record according to the latest satellite observations us government scientists from the. Without a protective ozone layer, there would not be life on earth as we know it. Watch a movie of the daily progression through a season or the annual progression of the. Abnormal weather patterns in the upper atmosphere over antarctica dramatically limited ozone depletion in september and october, resulting.
The level of ozone depletion was severe enough that scientists said it could be compared to the ozone hole that forms over antarctica every winter. National institute of water and atmospheric research niwa, lauder, central otago, new zealand abstract. The ozone hole over antarctica currently extends over 26 million square kilometres an area larger than the north american continent. Balloonborne ozone profiles measured at south pole. Feb 12, 2018 far above earths surface, the ozone layer helps to protect life from harmful ultraviolet radiation. In the early 1980s, scientists began to realize that cfcs were creating a thin spota holein the ozone layer over antarctica every spring. This graph shows the area of ozone depletion in antarctica. Esas copernicus sentinel5p mission manager claus zehner said, the tropomi total ozone measurements are extending europes capability of the continuous global ozone monitoring from space since 1995. Satellite measurements provide consistent global maps of columnintegrated ozone around the world, from which scientists first noticed a dramatic thinning in the 1980s. Apr 11, 2020 london, april 10 as the world fights the new coronavirus pandemic, climate change is back to threaten us as over the last month, a new unusual hole in the ozone layer has started to form over the arc. Launched in october 2017, sentinel5p is the first copernicus mission dedicated to monitoring our atmosphere. In the middle of the ozone hole, the chlorine and bromine molecules have completely destroyed all of the ozone in a layer between 12 and 20 km 7.
Very useful to create presentations about space science, astrophysics, astronomy, astronomical objects like stars, planets, galaxies, nebulae etc. A similar event caused an ozone hole in 2011, cnet reported. The hole in earths ozone layer that forms over antarctica each september grew to about 8. In not so good news for earth, unusual miniozone hole opens. Leading scientists claim this hole could be gone by 2050. Watch how ozone concentrations in the stratosphere have changed from 1979 through 2018. Ozone only returns to normal values after the vortex is broken up and midlatitude air is able to enter the sky over antarctica replenishing ozone and converting the active chlorine back to an inactive form. In the early 1980s, scientists began to realize that cfcs were creating a thin spota hole in the ozone layer over antarctica every spring. The ozone hole that opens every year over the antarctic is on course to be the smallest in three decades, scientists have said. The ozone hole is smaller because of human caused global warming. Nov 04, 2008 the ozone hole over antarctica grew to the size of north america this year the fifth largest on record according to the latest satellite observations us government scientists from the. Learn what cfcs are, how they have contributed to the ozone hole, and how the 1989 montreal. The ozone hole is caused by the effect of pollutants in the atmosphere destroying stratospheric ozone.