How ozone is converted to oxygen:
![Picture](/uploads/1/9/3/1/19314261/350687458.jpg?599)
The destruction of ozone molecules and cycling of chlorine atoms to continue the process
http://www.esrl.noaa.gov/gsd/outreach/education/samii/SAMII_Activity3.html
http://www.esrl.noaa.gov/gsd/outreach/education/samii/SAMII_Activity3.html
ozone layer reduction and potential threats and recoveries
- By 2006: U.N. reported that the countries which have ratified the Montreal Protocol had reduced their consumption of ozone depleting substance by ~95%
- However, this was also the time of the Arctic hole being its greatest
- Although the Montreal Protocol has been efficient in reducing the emissions of ozone
depleting substances (ODS), such as CFCs, Nitrous oxide (N20), is the leading ODS of
the 21st century
- Although the Montreal Protocol has been efficient in reducing the emissions of ozone
depleting substances (ODS), such as CFCs, Nitrous oxide (N20), is the leading ODS of
the 21st century
- Recovery so far of the upper stratosphere of the ozone almost entirely linked to CFC reductions
- By 2030: all developed countries are scheduled to complete the phaseout of ozone depleting substances
- 2060 -2075: earliest projected time frame for recovery of layer and for chlorine content to go back to levels seen in the 1960s
- Options to accelerate ozone recovery: ozone and climate benefits
references
Daniel, J. S., et al. "Options to Accelerate Ozone Recovery: Ozone and Climate Benefits." Atmospheric Chemistry and Physics10.16
(2010): 7697-707. ProQuest. Web. 24 Apr. 2013.
"Is the Ozone Layer on the Road to Recovery?" European Space Agency. N.p., 8 Feb. 2013. Web. 22 Apr. 2013.
Mäder, J. A., et al. "Evidence for the Effectiveness of the Montreal Protocol to Protect the Ozone Layer." Atmospheric Chemistry and
Physics 10.24 (2010): 12161. ProQuest. Web. 24 Apr. 2013.
"NOAA Study Shows Nitrous Oxide Now Top Ozone-Depleting Emission." ESRL News. NOAA, 27 Aug. 2009. Web. 23 Apr. 2013.
Ravishankara, A. R., John S. Daniel, and Robert W. Portmann. "Nitrous Oxide (N2 O): The Dominant Ozone-Depleting Substance
Emitted in the 21st Century." Sciencemag.org. NOAA, 27 Aug. 2009. Web. 23 Apr. 2013.
(2010): 7697-707. ProQuest. Web. 24 Apr. 2013.
"Is the Ozone Layer on the Road to Recovery?" European Space Agency. N.p., 8 Feb. 2013. Web. 22 Apr. 2013.
Mäder, J. A., et al. "Evidence for the Effectiveness of the Montreal Protocol to Protect the Ozone Layer." Atmospheric Chemistry and
Physics 10.24 (2010): 12161. ProQuest. Web. 24 Apr. 2013.
"NOAA Study Shows Nitrous Oxide Now Top Ozone-Depleting Emission." ESRL News. NOAA, 27 Aug. 2009. Web. 23 Apr. 2013.
Ravishankara, A. R., John S. Daniel, and Robert W. Portmann. "Nitrous Oxide (N2 O): The Dominant Ozone-Depleting Substance
Emitted in the 21st Century." Sciencemag.org. NOAA, 27 Aug. 2009. Web. 23 Apr. 2013.