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Adarv you should research about 'Is ozone layer still there'

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Adarv you should research about 'Is ozone layer still there'

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By melvin

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Arafat if your done with video animation upload it here

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My script

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https://www.youtube.com/watch?v=7cBITRn8mNE

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Animation of the  2019 Antarctic Ozone Hole

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*Unkown username* haha its just Nahyan explorer

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*Unkown username* haha its just Nahyan explorer

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How damaged is the ozone layer?

The ozone layer's status today

More than 30 years after the Montreal Protocol, NASA scientists documented the first direct proof that Antarctic ozone is recovering because of the CFC phase-down: Ozone depletion in the region has declined 20 percent since 2005.

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Here is my video

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Shrihan Prajith
5 C

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Why is ozone above oxygen?

Up in the higher reaches of the atmosphere, ozone is constantly being created due to all that sunlight constantly slamming into oxygen molecules and breaking them apart. That's why the ozone concentration is higher up there than it is back on Earth.22 Jan 2022

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Whoever wants to send a video about protecting the ozone layer that can do it

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Whoever wants to send a video about protecting the ozone layer that can do it

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my sway i made it arnav if any ideas pls tell

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my sway i made it arnav if any ideas pls tell

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Our Group name is EXPLORERS

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Nahyan Noufal how was the ozone layer formed???

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Nahyan Noufal how was the ozone layer formed???

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In the first step, solar ultraviolet radiation (sunlight) breaks apart an oxygen molecule to form two separate oxygen atoms. In the second step, each atom then undergoes a binding collision with another oxygen molecule to form an ozone molecule.

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Updated

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Arafat nice video but just fix the ending

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Levels of ozone at various altitudes and blocking of different bands of ultraviolet radiation. Essentially all UV-C (100–280 nm) is blocked by dioxygen (from 100–200 nm) or else by ozone (200–280 nm) in the atmosphere. The shorter portion of the UV-C band and the more energetic UV above this band causes the formation of the ozone layer, when single oxygen atoms produced by UV photolysis of dioxygen (below 240 nm) react with more dioxygen. The ozone layer also blocks most, but not quite all, of the sunburn-producing UV-B (280–315 nm) band, which lies in the wavelengths longer than UV-C. The band of UV closest to visible light, UV-A (315–400 nm), is hardly affected by ozone, and most of it reaches the ground. UV-A does not primarily cause skin reddening, but there is evidence that it causes long-term skin damage.

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This is my research

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HOW TO PROTECT THE OZONE LAYER? Ans:Buy air-conditioning and refrigeration equipment that do not use HCFCs as refrigerant. Buy aerosol products that do not use HCFCs or CFCs as propellants. Conduct regular inspection and maintenance of air-conditioning and refrigeration appliances to prevent and minimize refrigerant leakage.

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To protect the ozone layer we need to make a substance which can stop uv light and after we are done we should send rockets or shuttles to the stratosphere with the special substance to repair the hole in the ozone layer

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Scientists from the Copernicus Atmosphere Monitoring Service confirm that the 2021 Antarctic ozone hole has almost reached its end, following a season with a considerably large and prolonged ozone hole. Its closure will occur only a few days earlier than in 2020, which was the longest lived since 1979.20

The ozone layer or ozone shield is a region of Earth's stratosphere that absorbs most of the Sun's ultraviolet radiation. It contains a high concentration of ozone (O3) in relation to other parts of the atmosphere, although still small in relation to other gases in the stratosphere

In 1985 Jonathan Shanklin was a junior researcher at BAS when he found out about a invisible shield that protects us from solar radiation. We catch up with him to learn about his work and how it has made a difference. It's 36 years since scientists first discovered the hole in the ozone lay

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1. No unessessary posts
2. Your name should be included in the posts
3.Answer should be blue Questions should be orange And announcment should be in green also something very important should be in red

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Explorer nahyan information about ozone layer updated*

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Explorer nahyan information about ozone layer updated*

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The photochemical mechanisms that give rise to the ozone layer were discovered by the British physicist Sydney Chapman in 1930. Ozone in the Earth's stratosphere is created by ultraviolet light striking ordinary oxygen molecules containing two oxygen atoms (O₂), splitting them into individual oxygen atoms (atomic oxygen); the atomic oxygen then combines with unbroken O₂ to create ozone, O₃. The ozone molecule is unstable (although, in the stratosphere, long-lived) and when ultraviolet light hits ozone it splits into a molecule of O₂ and an individual atom of oxygen, a continuing process called the ozone-oxygen cycle. Chemically, this can be described as:

{\displaystyle {\ce {O2{}+{\mathit {h}}\nu _{uv}->2O}}}

{\displaystyle {\ce {O + O2 <-> O3}}}

About 90 percent of the ozone in the atmosphere is contained in the stratosphere. Ozone concentrations are greatest between about 20 and 40 kilometres (66,000 and 131,000 ft), where they range from about 2 to 8 parts per million. If all of the ozone were compressed to the pressure of the air at sea level, it would be only 3 millimetres (1⁄8 inch) thick.[6]

Ultraviolet light

UV-B energy levels at several altitudes. Blue line shows DNA sensitivity. Red line shows surface energy level with 10 percent decrease in ozone

Levels of ozone at various altitudes and blocking of different bands of ultraviolet radiation. Essentially all UV-C (100–280 nm) is blocked by dioxygen (from 100–200 nm) or else by ozone (200–280 nm) in the atmosphere. The shorter portion of the UV-C band and the more energetic UV above this band causes the formation of the ozone layer, when single oxygen atoms produced by UV photolysis of dioxygen (below 240 nm) react with more dioxygen. The ozone layer also blocks most, but not quite all, of the sunburn-producing UV-B (280–315 nm) band, which lies in the wavelengths longer than UV-C. The band of UV closest to visible light, UV-A (315–400 nm), is hardly affected by ozone, and most of it reaches the ground. UV-A does not primarily cause skin reddening, but there is evidence that it causes long-term skin damage.

Although the concentration of the ozone in the ozone layer is very small, it is vitally important to life because it absorbs biologically harmful ultraviolet (UV) radiation coming from the Sun. Extremely short or vacuum UV (10–100 nm) is screened out by nitrogen. UV radiation capable of penetrating nitrogen is divided into three categories, based on its wavelength; these are referred to as UV-A (400–315 nm), UV-B (315–280 nm), and UV-C (280–100 nm).

UV-C, which is very harmful to all living things, is entirely screened out by a combination of dioxygen (< 200 nm) and ozone (> about 200 nm) by around 35 kilometres (115,000 ft) altitude. UV-B radiation can be harmful to the skin and is the main cause of sunburn; excessive exposure can also cause cataracts, immune system suppression, and genetic damage, resulting in problems such as skin cancer. The ozone layer (which absorbs from about 200 nm to 310 nm with a maximal absorption at about 250 nm)[7] is very effective at screening out UV-B; for radiation with a wavelength of 290 nm, the intensity at the top of the atmosphere is 350 million times stronger than at the Earth's surface. Nevertheless, some UV-B, particularly at its longest wavelengths, reaches the surface, and is important for the skin's production of vitamin D.

Ozone is transparent to most UV-A, so most of this longer-wavelength UV radiation reaches the surface, and it constitutes most of the UV reaching the Earth. This type of UV radiation is significantly less harmful to DNA, although it may still potentially cause physical damage, premature aging of the skin, indirect genetic damage, and skin cancer.[8]

Distribution in the stratosphere

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The thickness of the ozone layer varies worldwide and is generally thinner near the equator and thicker near the poles.[9] Thickness refers to how much ozone is in a column over a given area and varies from season to season. The reasons for these variations are due to atmospheric circulation patterns and solar intensity.[10]

The majority of ozone is produced over the tropics and is transported towards the poles by stratospheric wind patterns. In the northern hemisphere these patterns, known as the Brewer-Dobson circulation, make the ozone layer thickest in the spring and thinnest in the fall.[9] When ozone is produced by solar UV radiation in the tropics, it is done so by circulation lifting ozone-poor air out of the troposphere and into the stratosphere where the sun photolyzes oxygen molecules and turns them into ozone. Then, the ozone-rich air is carried to higher latitudes and drops into lower layers of the atmosphere.[9]

Research has found that the ozone levels in the United States are highest in the spring months of April and May and lowest in October. While the total amount of ozone increases moving from the tropics to higher latitudes, the concentrations are greater in high northern latitudes than in high southern latitudes, with spring ozone columns in high northern latitudes occasionally exceeding 600 DU and averaging 450 DU whereas 400 DU constituted a usual maximum in the Antarctic before anthropogenic ozone depletion. This difference occurred naturally because of the weaker polar vortex and stronger Brewer-Dobson circulation in the northern hemisphere owing to that hemisphere’s large mountain ranges and greater contrasts between land and ocean temperatures.[11] The difference between high northern and southern latitudes has increased since the 1970s due to the ozone hole phenomenon.[9] The highest amounts of ozone are found over the Arctic during the spring months of March and April, but the Antarctic has the lowest amounts of ozone during the summer months of September and October,

Brewer-Dobson circulation in the ozone layer.

Depletion

Main article: Ozone depletion

NASA projections of stratospheric ozone concentrations if chlorofluorocarbons had not been banned.

The ozone layer can be depleted by free radical catalysts, including nitric oxide (NO), nitrous oxide (N₂O), hydroxyl (OH), atomic chlorine (Cl), and atomic bromine (Br). While there are natural sources for all of these species, the concentrations of chlorine and bromine increased markedly in recent decades because of the release of large quantities of man-made organohalogen compounds, especially chlorofluorocarbons (CFCs) and bromofluorocarbons.[12] These highly stable compounds are capable of surviving the rise to the stratosphere, where Cl and Br radicals are liberated by the action of ultraviolet light. Each radical is then free to initiate and catalyze a chain reaction capable of breaking down over 100,000 ozone molecules. By 2009, nitrous oxide was the largest ozone-depleting substance (ODS) emitted through human activities.[13]

The breakdown of ozone in the stratosphere results in reduced absorption of ultraviolet radiation. Consequently, unabsorbed and dangerous ultraviolet radiation is able to reach the Earth's surface at a higher intensity. Ozone levels have dropped by a worldwide average of about 4 percent since the late 1970s. For approximately 5 percent of the Earth's surface, around the north and south poles, much larger seasonal declines have been seen, and are described as "ozone holes". Let it be known that the "ozone holes" are actually patches in the ozone layer in which the ozone is thinner. The thinnest parts of the ozone are at the polar points of Earth's axis.[14] The discovery of the annual depletion of ozone above the Antarctic was first announced by Joe Farman, Brian Gardiner and Jonathan Shanklin, in a paper which appeared in Nature on May 16, 1985.

Regulation attempts have included but not have been limited to the Clean Air Act implemented by the United States Environmental Protection Agency. The Clean Air Act introduced the requirement of National Ambient Air Quality Standards (NAAQS) with ozone pollutions being one of six criteria pollutants. This regulation has proven to be effective since counties, cities and tribal regions must abide by these standards and the EPA also provides assistance for each region to regulate contaminants.[15] Effective presentation of information has also proven to be important in order to educate the general population of the existence and regulation of ozone depletion and contaminants. A scientific paper was written by Sheldon Ungar in which the author explores and studies how information about the depletion of the ozone, climate change and various related topics. The ozone case was communicated to lay persons "with easy-to-understand bridging metaphors derived from the popular culture" and related to "immediate risks with everyday relevance".[16] The specific metaphors used in the discussion (ozone shield, ozone hole) proved quite useful and, compared to global climate change, the ozone case was much more seen as a "hot issue" and imminent risk. Lay people were cautious about a depletion of the ozone layer and the risks of skin cancer.

"Bad" ozone can cause adverse health risks respiratory effects (difficulty breathing) and is proven to be an aggravator of respiratory illnesses such as asthma, COPD and emphysema.[17] That is why many countries have set in place regulations to improve "good" ozone and prevent the increase of "bad" ozone in urban or residential areas. In terms of ozone protection (the preservation of "good" ozone) the European Union has strict guidelines on what products are allowed to be bought, distributed or used in specific areas.[18] With effective regulation, the ozone is expected to heal over time.[19]

Levels of atmospheric ozone measured by satellite show clear seasonal variations and appear to verify their decline over time.

Main article: Ozone depletion and climate change

To support successful regulation attempts, the ozone case was communicated to lay persons "with easy-to-understand bridging metaphors derived from the popular culture" and related to "immediate risks with everyday relevance".[citation needed] The specific metaphors used in the discussion (ozone shield, ozone hole) proved quite useful[20] and, compared to global climate change, the ozone case was much more seen as a "hot issue" and imminent risk.[21] Lay people were cautious about a depletion of the ozone layer and the risks of skin cancer.

In 1978, the United States, Canada and Norway enacted bans on CFC-containing aerosol sprays that damage the ozone layer. The European Community rejected an analogous proposal to do the same. In the U.S., chlorofluorocarbons continued to be used in other applications, such as refrigeration and industrial cleaning, until after the discovery of the Antarctic ozone hole in 1985. After negotiation of an international treaty (the Montreal Protocol), CFC production was capped at 1986 levels with commitments to long-term reductions.[22] This allowed for a ten-year phase-in for developing countries[23] (identified in Article 5 of the protocol). Since that time, the treaty was amended to ban CFC production after 1995 in the developed countries, and later in developing countries.[24] Today, all of the world's 197 countries have signed the treaty. Beginning January 1, 1996, only recycled and stockpiled CFCs were available for use in developed countries like the US. This production phaseout was possible because of efforts to ensure that there would be substitute chemicals and technologies for all ODS uses.[25]

On August 2, 2003, scientists announced that the global depletion of the ozone layer may be slowing down because of the international regulation of ozone-depleting substances. In a study organized by the American Geophysical Union, three satellites and three ground stations confirmed that the upper-atmosphere ozone-depletion rate slowed significantly during the previous decade. Some breakdown can be expected to continue because of ODSs used by nations which have not banned them, and because of gases which are already in the stratosphere. Some ODSs, including CFCs, have very long atmospheric lifetimes, ranging from 50 to over 100 years. It has been estimated that the ozone layer will recover to 1980 levels near the middle of the 21st century.[26] A gradual trend toward "healing" was reported in 2016.[27]

Compounds containing C–H bonds (such as hydrochlorofluorocarbons, or HCFCs) have been designed to replace CFCs in certain applications. These replacement compounds are more reactive and less likely to survive long enough in the atmosphere to reach the stratosphere where they could affect the ozone layer. While being less damaging than CFCs, HCFCs can have a negative impact on the ozone layer, so they are also being phased out.[28] These in turn are being replaced by hydrofluorocarbons (HFCs) and other compounds that do not destroy stratospheric ozone at all.

The residual effects of CFCs accumulating within the atmosphere lead to a concentration gradient between the atmosphere and the ocean. This organohalogen compound is able to dissolve into the ocean's surface waters and is able to act as a time-dependent tracer. This tracer helps scientists study ocean circulation by tracing biological, physical and chemical pathways [29]

Implications for astronomy

As ozone in the atmosphere prevents most energetic ultraviolet radiation reaching the surface of the Earth, astronomical data in these wavelengths have to be gathered from satellites orbiting above the atmosphere and ozone layer. Most of the light from young hot stars is in the ultraviolet and so study of these wavelengths is important for studying the origins of galaxies. The Galaxy Evolution Explorer, GALEX, is an orbiting ultraviolet space telescope launched on April 28, 2003, which operated until early 2012.[30]

This GALEX image of the Cygnus Loop nebula could not have been taken from the surface of the Earth because the ozone layer blocks the ultra-violet radiation emitted by the nebula.

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We will suffer from the heat and it can damage our skin and body so it is our job to give ideas to protect the ozone layer

By Joshua

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Sources

The photochemical mechanisms that give rise to the ozone layer were discovered by the British physicist Sydney Chapman in 1930. Ozone in the Earth's stratosphere is created by ultraviolet light striking ordinary oxygen molecules containing two oxygen atoms (O₂), splitting them into individual oxygen atoms (atomic oxygen); the atomic oxygen then combines with unbroken O₂ to create ozone, O₃. The ozone molecule is unstable (although, in the stratosphere, long-lived) and when ultraviolet light hits ozone it splits into a molecule of O₂ and an individual atom of oxygen, a continuing process called the ozone-oxygen cycle. Chemically, this can be described as:

{\displaystyle {\ce {O2{}+{\mathit {h}}\nu _{uv}->2O}}}

{\displaystyle {\ce {O + O2 <-> O3}}}

About 90 percent of the ozone in the atmosphere is contained in the stratosphere. Ozone concentrations are greatest between about 20 and 40 kilometres (66,000 and 131,000 ft), where they range from about 2 to 8 parts per million. If all of the ozone were compressed to the pressure of the air at sea level, it would be only 3 millimetres (1⁄8 inch) thick.

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What is the current state of the ozone layer?

PDF

Last modified 08 Dec 2021

7 min read

The ozone layer sits in the stratosphere between 15 km and 30 km above the earth, and shields us and other living things from the sun’s harmful ultraviolet radiation. Ozone layer depletion could have serious effects on human health and the environment.

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What is the current state of the ozone layer?

Ozone-depleting substances 2021

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Key messages

A significant reduction in the consumption of ozone-depleting substances (ODS) has been achieved globally since 1986. This reduction has largely been driven by the 1987 United Nations Environment Programme (UNEP) Montreal Protocol.

The largest historical extent of the ozone hole — 28.4 million square kilometres — occurred in September 2000. This area is equivalent to almost seven times the territory of the EU.

The 2021 ozone hole has been similar in depth and size to 2020.

Depletion of stratospheric ozone occurs over both hemispheres of the Earth. However, this phenomenon is significantly less severe in the northern hemisphere (Arctic) than in the southern hemisphere (Antarctica). This is the case because, year-to-year, meteorological variability is larger over the Arctic than over the Antarctic. Furthermore, temperatures in the stratosphere do not remain low for a long time in the Arctic as in the case in the Antarctic.

Generally, concentration levels of 220 Dobson Units (DU, marked by the thick contour in Figure 1) or less (represented in blue colours in Figure 1) are considered to show severe ozone depletion and constitute the so-called ozone hole. This is only apparent in the southern hemisphere. Here, the largest historical extent of the ozone hole - 28.4 million km²  (Figure 1 and 2) - occurred in September 2000. This area is equivalent to almost seven times the territory of the EU.

Figure 1. Maximum ozone hole extent over the southern hemisphere, from 1979 to 2021

Note: Copernicus analyses of total ozone column over the Antarctic. The blue colours indicate lowest ozone columns, while yellow and red indicate higher ozone columns. Ozone columns are commonly measured in Dobson Units. One Dobson Unit is the number of molecules of ozone that would be required to create a layer of pure ozone 0.01 millimetres thick at a temperature of 0 degrees Celsius and a pressure of 1 atmosphere. 300 DU corresponds to 3 millimetres of ozone.

Data source: Copernicus Atmosphere Monitoring Service (CAMS).

Overall, the ozone hole has shown signs of healing since 2000, which is predominantly attributable to phasing out ozone-depleting substances under the Montreal Protocol. At the same time, the extent of the ozone hole is strongly driven by stratospheric temperature, with warmer temperatures leading to a smaller ozone hole, such as in 2019 (for more information, visit the website of the Copernicus Atmosphere Monitoring Service).

However, this is not directly attributable to anthropogenic climate change, since greenhouse gases generally have a cooling effect in the stratosphere, while they contribute to global warming in the troposphere. This stratospheric cooling has a positive effect on ozone recovery with the exception of the polar regions. Here, very low temperatures can lead to an increase in the formation of polar stratospheric clouds, which facilitate ozone depletion. The ozone hole can also be periodically influenced by volcanic eruptions, increasing the stratospheric particle load and thereby depleting ozone. This partially explains those occasional years during which the ozone hole is comparatively large, e.g. in 2015 (27.9 million km²).

Figure 2. Maximum ozone hole area hole

Note: The ozone hole is a region of exceptionally depleted ozone in the stratosphere over the Antarctic. All figures are in million square kilometres.

Data source: Copernicus Atmosphere Monitoring Service (CAMS).

This year's ozone hole over the southern hemisphere showed a maximum area of 24.8 million km² in late September (Figure 2) and resembles the one from 2019 (24.0 million km2). The 2021 ozone hole has been one of the larger and deeper ones in recent years and was larger than the average over the last five and ten years (20.0 and 21.4 million km², respectively). According to researchers from the Copernicus Atmosphere Monitoring Service, colder-than-average temperatures together with strong winds in the stratosphere circling Antarctica contributed to the large 2021 ozone hole size. Ozone loss in the northern hemisphere is usually much more limited compared to the southern hemisphere. In Artic spring 2020, however, ozonesonde measurements showed ozone depletion that has been explained to occur due to unusually strong, long-lasting cold temperatures in the stratosphere.

The 2019 ozone hole has been a very small and short-lived one, which was mostly driven by special meteorological conditions. In particular, August and September 2019 showed exceptionally high temperatures in altitudes between 20 and 30 km above the ground of the Antarctic, stopping the formation of icy clouds that usually trap ozone-depleting molecules that, when released during southern hemispheric springtime, trigger ozone destruction. Taken together, the mitigation of ozone depletion is still very fragile and scientific evidence suggests that more action is still required to remove pressure on the ozone layer caused by ODS.

Consult the EEA's latest information on ozone-depleting substances (ODS) for a complete analysis on the EU's continued progress in phasing out ODS.

Consult the EEA's online data viewer for more information and data reported by companies under the Ozone Regulation.

Browse the EEA's Climate and Energy website for more information on ozone-depleting substances.

Photo: © Arif Miletli, Sustainably Yours /EEA

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References

1. ^ "Ozone Basics". NOAA. 2008-03-20. Archived from the original on 2017-11-21. Retrieved 2007-01-29.

2. ^ McElroy, C.T.; Fogal, P.F. (2008). "Ozone: From discovery to protection". Atmosphere-Ocean. 46: 1–13. doi:10.3137/ao.460101. S2CID 128994884.

3. ^ "Ozone layer". Retrieved 2007-09-23.

4. ^ An Interview with Lee Thomas, EPA's 6th Administrator. Video, Transcript (see p13). April 19, 2012.

5. ^ SPACE.com staff (October 11, 2011). "Scientists discover Ozone Layer on Venus". SPACE.com. Purch. Retrieved October 3, 2015.

6. ^ "NASA Facts Archive". Retrieved 2011-06-09.

7. ^ Matsumi, Y.; Kawasaki, M. (2003). "Photolysis of Atmospheric Ozone in the Ultraviolet Region" (PDF). Chem. Rev. 103 (12): 4767–4781. doi:10.1021/cr0205255. PMID 14664632. Archived from the original (PDF) on June 17, 2012. Retrieved March 14, 2015.

8. ^ Narayanan, D.L.; Saladi, R.N.; Fox, J.L. (2010). "Review: Ultraviolet radiation and skin cancer". International Journal of Dermatology. 49 (9): 978–986. doi:10.1111/j.1365-4632.2010.04474.x. PMID 20883261. S2CID 22224492.

9. ^
Jump up to:a b c d Tabin, Shagoon (2008). Global Warming: The Effect Of Ozone Depletion. APH Publishing. p. 194. ISBN 9788131303962. Retrieved 12 January 2016.

10. ^ "Nasa Ozone Watch: Ozone facts". ozonewatch.gsfc.nasa.gov. Retrieved 2021-09-16.

11. ^ Douglass, Anne R.; Newman, Paul A.; Solomon, Susan (2014). "The Antarctic ozone hole: An update". Physics Today. American Institute of Physics. 67 (7): 42–48. Bibcode:2014PhT....67g..42D. doi:10.1063/PT.3.2449. hdl:1721.1/99159.

12. ^ "Halocarbons and Other Gases". Emissions of Greenhouse Gases in the United States 1996. Energy Information Administration. 1997. Archived from the original on 2008-06-29. Retrieved 2008-06-24.

13. ^ "NOAA Study Shows Nitrous Oxide Now Top Ozone-Depleting Emission". NOAA. 2009-08-27. Retrieved 2011-11-08.

14. ^ "ozone layer | National Geographic Society". education.nationalgeographic.org. Retrieved 2022-05-30.

15. ^ US EPA, OAR (2016-12-14). "Ozone Implementation Regulatory Actions". www.epa.gov. Retrieved 2022-05-30.

16. ^ Ungar, Sheldon (July 2000). "Knowledge, ignorance and the popular culture: climate change versus the ozone hole". Public Understanding of Science. 9 (3): 297–312. doi:10.1088/0963-6625/9/3/306. ISSN 0963-6625.

17. ^ Zhang, Junfeng (Jim); Wei, Yongjie; Fang, Zhangfu (2019). "Ozone Pollution: A Major Health Hazard Worldwide". Frontiers in Immunology. 10. doi:10.3389/fimmu.2019.02518/full#h6. ISSN 1664-3224.

18. ^ "Ozone Regulation". ec.europa.eu. Retrieved 2022-05-30.

19. ^ US EPA, OAR (2015-07-15). "International Treaties and Cooperation about the Protection of the Stratospheric Ozone Layer". www.epa.gov. Retrieved 2022-05-30.

20. ^ Ungar, Sheldon (2000). "Knowledge, ignorance and the popular culture: climate change versus the ozone hole". Public Understanding of Science. 9 (3): 297–312. doi:10.1088/0963-6625/9/3/306. S2CID 7089937.

21. ^ Grundmann, Reiner (2007). "Climate Change and Knowledge Politics" (PDF). Environmental Politics. 16 (3): 414–432. CiteSeerX 10.1.1.535.4984. doi:10.1080/09644010701251656. S2CID 153866225. Archived from the original (PDF) on August 26, 2014. Retrieved March 14, 2015.

22. ^ Morrisette, Peter M. (1989). "The Evolution of Policy Responses to Stratospheric Ozone Depletion". Natural Resources Journal. 29: 793–820. Retrieved 2010-04-20.

23. ^ An Interview with Lee Thomas, EPA's 6th Administrator. Video, Transcript (see p15). April 19, 2012.

24. ^ "Amendments to the Montreal Protocol". EPA. 2010-08-19. Retrieved 2011-03-28.

25. ^ "Brief Questions and Answers on Ozone Depletion". EPA. 2006-06-28. Retrieved 2011-11-08.

26. ^ "Stratospheric Ozone and Surface Ultraviolet Radiation" (PDF). Scientific Assessment of Ozone Depletion: 2010. WMO. 2011. Retrieved March 14, 2015.

27. ^ Solomon, Susan, et al. (June 30, 2016). "Emergence of healing in the Antarctic ozone layer". Science. 353 (6296): 269–74. Bibcode:2016Sci...353..269S. doi:10.1126/science.aae0061. PMID 27365314.

28. ^ "Ozone Depletion Glossary". EPA. Retrieved 2008-09-03.

29. ^ Fine, Rana A. (2011). "Observations of CFCs and SF6 as Ocean Tracers" (PDF). Annual Review of Marine Science. 3: 173–95. Bibcode:2011ARMS....3..173F. doi:10.1146/annurev.marine.010908.163933. PMID 21329203. Archived from the original (PDF) on 2015-02-10.

30. ^ Society, National Geographic (2011-05-09). "ozone layer". National Geographic Society. Retrieved 2021-09-16.

Further reading

Science

Andersen, S. O. (2015). "Lessons from the stratospheric ozone layer protection for climate". Journal of Environmental Studies and Sciences. 5 (2): 143–162. doi:10.1007/s13412-014-0213-9. S2CID 129725437.

Andersen, S.O.; Sarma, K.M.; Sinclair, L. (2012). Protecting the Ozone Layer: The United Nations History. Taylor & Francis. ISBN 978-1-84977-226-6.

United Nations Environment Programme (2010). Environmental Effects of Ozone Depletion and its Interactions with Climate Change: 2010 Assessment. Nairobi: UNEP.

Velders, G. J. M.; Fahey, D. W.; Daniel, J. S.; McFarland, M.; Andersen, S. O. (2009). "The large contribution of projected HFC emissions to future climate forcing". Proceedings of the National Academy of Sciences. 106 (27): 10949–10954. Bibcode:2009PNAS..10610949V. doi:10.1073/pnas.0902817106. PMC 2700150. PMID 19549868. S2CID 3743609.

Velders, Guus J.M.; Andersen, Stephen O.; Daniel, John S.; Fahey, David W.; McFarland, Mack (2007). "The Importance of the Montreal Protocol in Protecting Climate". Proceedings of the National Academy of Sciences of the United States of America. 104 (12): 4814–4819. Bibcode:2007PNAS..104.4814V. doi:10.1073/pnas.0610328104. PMC 1817831. PMID 17360370.

Policy

Zaelke, Durwood; Borgford-Parnell, Nathan (2015). "The importance of phasing down hydrofluorocarbons and other short-lived climate pollutants". Journal of Environmental Studies and Sciences. 5 (2): 169–175. doi:10.1007/s13412-014-0215-7. S2CID 128974741.

Xu, Y.; Zaelke, D.; Velders, G. J. M.; Ramanathan, V. (2013). "The role of HFCS in mitigating 21st century climate change". Atmospheric Chemistry and Physics. 13 (12): 6083–6089. Bibcode:2013ACP....13.6083X. doi:10.5194/acp-13-6083-2013.

Molina, M.; Zaelke, D.; Sarma, K. M.; Andersen, S. O.; Ramanathan, V.; Kaniaru, D. (2009). "Reducing abrupt climate change risk using the Montreal Protocol and other regulatory actions to complement cuts in CO2 emissions". Proceedings of the National Academy of Sciences. 106 (49): 20616–20621. doi:10.1073/pnas.0902568106. PMC 2791591. PMID 19822751. S2CID 13240115.

Anderson, S. O.; Sarma, M. K.; Taddonio, K. (2007). Technology Transfer for the Ozone Layer: Lessons for Climate Change. London: Earthscan. ISBN 9781849772846.

Benedick, Richard Elliot; World Wildlife Fund (U.S.); Institute for the Study of Diplomacy. Georgetown University. (1998). Ozone Diplomacy: New Directions in Safeguarding the Planet (2nd ed.). Harvard University Press. ISBN 978-0-674-65003-9. (Ambassador Benedick was the Chief U.S. Negotiator at the meetings that resulted in the Montreal Protocol.)

Chasek, P. S.; Downie, David L.; Brown, J. W. (2013). Global Environmental Politics (6th ed.). Boulder: Westview Press. ISBN 9780813348971.

Grundmann, Reiner (2001). Transnational Environmental Policy: Reconstructing Ozone. Psychology Press. ISBN 978-0-415-22423-9.

Parson, E. (2003). Protecting the Ozone Layer: Science and Strategy. Oxford: Oxford University Press. ISBN 9780190288716.

External links

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By Melvin 5C