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Antarctic ozone depletion: 2‐D model studies
Author(s) -
Isaksen Ivar S. A.,
Stordal Frode
Publication year - 1986
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/gl013i012p01327
Subject(s) - ozone depletion , bromine , ozone , chlorine , atmospheric sciences , ozone layer , environmental chemistry , environmental science , stratosphere , chemistry , geology , organic chemistry
Antarctic ozone depletion is estimated in a 2‐D global model as a result of increase in chlorine levels from 1 ppb to 2.7 ppb and an increase in bromine levels from 15 ppt to 30 ppt. The adopted increase is assumed to be the anthropogenic influence on the stratospheric concentrations of chlorine and bromine species in 1985. Heterogeneous formation of ClO from the reaction between ClONO 2 and HCl is included in the calculations, hypothesizing this is the dominant reaction path for chlorinated species on particle surfaces. A total ozone depletion as high as 14‐20% may have occurred during the month of October at 80°S when maximum depletion is obtained. Both the magnitude and the time period when the maximum depletion occurs, agree with observed depletion over the last 8 years.