ચિત્ર:Ozone cfc trends.png

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સારાંશ:

વર્ણન
English: Ozone-depleting gas trends and equivalent chlorine effect. Combined chlorine and bromine in the lower atmosphere or troposphere from the most abundant chlorinated and brominated chemicals controlled by the Montreal Protocol. These changes are reflected in the upper atmosphere stratosphere (10-25 km), where most ozone loss occurs, with a delay (due to air transport) of 3-5 years. Bromine is included as an ozone-depleting chemical because although it is not as abundant as chlorine, it is 45 to 60 times more effective per atom in destroying stratospheric ozone. Earlier measurements showed that the peak of equivalent chlorine (chlorine + 45 (or 60) times bromine) occurred at the surface between mid-1992 and mid-1994.[1] The observed decrease is driven by a large and rapid decline in methyl chloroform and methyl bromide, gases that are regulated internationally by the Montreal Protocol. The initial decline in methyl bromide was larger than that expected from projections given in the WMO/UNEP 2002 Scientific Assessment to Ozone Depletion.[2][3]
Français : Tendances pour les gaz appauvrissant la couche d'ozone (et effet en équivalent-chlore). Chlore et brome sont les halogènes destructeurs d'ozone les plus abondants, ils sont contrôlés par le Protocole de Montréal qui a permis leur réduction globale dans la haute atmosphère stratosphère (10-25 km), où la plupart de l'ozone se crée. Les effets apparaissent avec un retard de 3 à 5 ans (dû au transport aérien des CFC). Le brome est bien moins abondant que le chlore, mais il est 45 à 60 fois plus efficace par atome pour détruire l'ozone stratosphérique. Des mesures antérieures ont montré que le pic en «équivalent-chlore» (chlore + 45 (ou 60) fois brome) s'est produit à la surface entre mi-1992 et mi-1994 [1].
La diminution observée est due à une baisse importante et rapide du chloroforme de méthyle et du bromure de méthyle, pesticide et biocide gazeux réglementés mondialement par le Protocole de Montréal|Protocole de Montréal. La baisse initiale du bromure de méthyle a été plus importante qu'attendue par les projections de l’évaluation scientifique OMM / PNUE de 2002 sur l’appauvrissement de la couche d’ozone. [2] [3]
સ્રોત

Transferred from en.wikipedia to Commons by Maksim. ftp://140.172.192.211/hats/Total_Cl_Br/totCl_2004.ps

from CMDL Data Archive: http://www.cmdl.noaa.gov/info/ftpdata.html
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પરવાના

Public domain
This image is in the public domain because it contains materials that originally came from the U.S. National Oceanic and Atmospheric Administration, taken or made as part of an employee's official duties.

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References

  1. a b News Release Feb 6, 2001. Climate Monitoring and Data Laboratory (March 17). Archived from the original on 2006-09-29. Retrieved on 2006-01-15.
  2. a b CMDL Scientists find that ozone-depleting bromine is now on the decline. Climate Monitoring and Data Laboratory (June 9). Archived from the original on 2006-09-29. Retrieved on 2006-01-15.
  3. a b Halocarbons and other Atmospheric Trace Species. Climate Monitoring and Data Laboratory Summary Report #27 (March 17). Archived from the original on 2007-02-21. Retrieved on 2006-01-15.

Original edit history

The original description page was here. All following user names refer to en.wikipedia.
તારીખ/સમય સભ્ય ટિપ્પણી
૯ જૂન ૨૦૦૫, ૨૦:૪૪ en:User:SEWilco /* References */ more complete version
૨ એપ્રિલ ૨૦૦૫, ૨૧:૧૬ en:User:SEWilco link to 3rd reference
૨ એપ્રિલ ૨૦૦૫, ૧૫:૩૪ en:User:Mozzerati /* References */ make into numbered list, but what's the last reference? It's not used? See [[Wikipedia:Footnote3]]
૨ એપ્રિલ ૨૦૦૫, ૧૫:૩૩ en:User:Mozzerati update {{endnote| template to be {{note| according to recent consensus. See [[Wikipedia:Footnote3]] and talk page.
૧૮ માર્ચ ૨૦૦૫, ૦૬:૩૨ en:User:SEWilco updates
૧૮ માર્ચ ૩૦૦૫, ૦૫:૩૩ en:User:SEWilco updates
૧૮ માર્ચ ૨૦૦૫, ૦૫:૧૧ en:User:SEWilco CFC gas trends. ==Related images== <gallery> Image:Major greenhouse gas trends.png|Greenhouse gas trends </gallery> ==Source== {{PD-USGov-DOC-NOAA}} Source: http://www.cmdl.noaa.gov/hats/graphs/graphs.html or ftp://ftp.cmdl.noaa.gov/hats/graphs/

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વર્તમાન૦૩:૩૦, ૩ ઓક્ટોબર ૨૦૧૬૦૩:૩૦, ૩ ઓક્ટોબર ૨૦૧૬નું લઘુચિત્ર સંસ્કરણ૧,૦૯૬ × ૧,૨૭૧ (૧૨૩ KB)CmdrjamesonCompressed with pngout. Reduced by 46kB (27% decrease).
૦૯:૪૧, ૬ ઓક્ટોબર ૨૦૦૯૦૯:૪૧, ૬ ઓક્ટોબર ૨૦૦૯નું લઘુચિત્ર સંસ્કરણ૧,૦૯૬ × ૧,૨૭૧ (૧૬૯ KB)Robert SkyhawkUpdated information current to 2008. Upload requested by English Wikipedia user Tobus2 via Images for Upload.
૦૧:૦૮, ૧૬ જાન્યુઆરી ૨૦૦૬૦૧:૦૮, ૧૬ જાન્યુઆરી ૨૦૦૬નું લઘુચિત્ર સંસ્કરણ૧,૧૩૯ × ૧,૫૭૭ (૨૪ KB)MaksimLa bildo estas kopiita de wikipedia:en. La originala priskribo estas: CFC gas trends and equivalent chlorine effect. Combined chlorine and bromine in the lower stratosphere (10-25 km), where most ozone loss occurs, leveled off around [

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