Portal de Periódicos da CAPES

Antarctic ozone depletion: 2-D model studies

1986; American Geophysical Union; Volume: 13; Issue: 12 Linguagem: Inglês

10.1029/gl013i012p01327

1944-8007

Ivar S. A. Isaksen, Frøde Stordal,

Atmospheric and Environmental Gas Dynamics

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.