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Datum
2012Typ
- Journal Article
ETH Bibliographie
yes
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Abstract
Ozone depletion is caused by the anthropogenic increase of halogen containingspecies in the atmosphere, which results in the enhancement of the concentrationof reactive chlorine and bromine in the stratosphere. To reduce the influence of an-thropogenic ozone-depleting substances (ODS), the Montreal Protocol was agreed by5Governments in 1987, with several Amendments adopted later. In order to assess thebenefits of the Montreal Protocol and its Amendments (MPA) on ozone and UV radia-tion, two different runs of the chemistry-climate model (CCM) SOCOL have been car-ried out. The first run was driven by the emission of ozone depleting substances (ODS)prescribed according to the restrictions of the Montreal Protocol and all its Amend-10ments. For the second run we allow the ODS to grow by 3 % annually. We find thatthe MPA would have saved up to 80 % of the global annual total ozone by the end ofthe 21st century. Our calculations also show substantial changes in surface tempera-ture and precipitations that could occur in the world without MPA implementations. Toillustrate the changes in UV radiation at the surface and to emphasize certain features15which can only be seen for some particular regions if the influence of the cloud coverchanges is accounted for, we calculate geographical distribution of the erythemallyweighted irradiance (Eery). For the no Montreal Protocol simulationEeryincreases byfactor of 4 to 16 between the 1970s and 2100. For the scenario including the MontrealProtocol it is found that UV radiation starts to decrease in 2000, with continuous decline20of 5 % to 10% at middle latitudes in the Northern and Southern hemispheres. Mehr anzeigen
Persistenter Link
https://doi.org/10.3929/ethz-b-000061575Publikationsstatus
publishedExterne Links
Zeitschrift / Serie
Atmospheric Chemistry and PhysicsBand
Seiten / Artikelnummer
Verlag
CopernicusOrganisationseinheit
03517 - Peter, Thomas (emeritus) / Peter, Thomas (emeritus)
ETH Bibliographie
yes
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