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Evaluating ozone depletion from very short‐lived halocarbons
Author(s) -
Olsen Seth C.,
Hannegan Bryan J.,
Zhu Xin,
Prather Michael J.
Publication year - 2000
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 - 10.1029/1999gl011040
Subject(s) - stratosphere , ozone , ozone depletion , atmospheric sciences , tropopause , troposphere , environmental science , ozone layer , climatology , latitude , meteorology , geology , physics , geodesy
A new approach is needed for calculating the ozone depletion potential (ODP) of short‐lived gases with mean lifetimes less than 100 days. Clearly, the ozone loss from such gases depends strongly on the location and season of emissions. It is proposed that delivery to the tropical tropopause is a surrogate for the amount of halogen entering the stratosphere. Thus 3‐D global models, with accurate simulation of tropospheric chemistry and transport, can calculate the ODP specific to tropical sources (high) and high‐latitude sources (low). The ODP of CH 2 BrCH 2 CH 3 from this analysis ranges from 0.0002 to 0.06 depending on the location and season of emissions.