Three-dimensional model evaluation of the Ozone Depletion Potentials for n-propyl bromide, trichloroethylene and perchloroethylene
Other literature type
Wuebbles, D. J.
Patten, K. O.
Francisco, J. S.
The existing solvents trichloroethylene (TCE) and perchloroethylene (PCE)
and proposed solvent n-propyl bromide (nPB) have atmospheric lifetimes from
days to a few months, but contain chlorine or bromine that could affect
stratospheric ozone. Several previous studies estimated the Ozone Depletion
Potentials (ODPs) for various assumptions of nPB emissions location, but
these studies used simplified modeling treatments. The primary purpose of
this study is to reevaluate the ODP for n-propyl bromide (nPB) using a
current-generation chemistry-transport model of the troposphere and
stratosphere. For the first time, ODPs for TCE and PCE are also evaluated in
a three-dimensional, global atmospheric chemistry-transport model. Emissions
representing industrial use of each compound are incorporated on land
surfaces from 30° N to 60° N. The atmospheric chemical lifetime
obtained for nPB is 24.7 days, similar to past literature, but the ODP is
0.0049, lower than in our past study of nPB. The derived atmospheric
lifetime for TCE is 13.0 days and for PCE is 111 days. The corresponding
ODPs are 0.00037 and 0.0050, respectively.