1,721,276 research outputs found
Contribution to the Ozone Trend of Heterogeneous Reactions of ClONO2 on the Sulfate Aerosol Layer
No full textA photochemical two-dimensional model
including a grid-point temperature distribution calculated
from long-term circulation statistics has been used
to assessth e relative role of heterogeneousre actions of
chlorine nitrate on background sulfate aerosols. The sulfuric
acid weight percentage is calculated explicitly as
a function of temperature and water vapor content. It
is shown that the contribution of these reactions to the
ozone trend in the 1980's accounts for about only 10%
the ozone loss due to N205+ H20 during the Northern
Hemisphere winter months at mid-latitude and between
50-200 mb. The weight of these reactions, however, may
substantially increase in the presence of larger aerosol
loading. The reaction ClON02 +HCl on sulfate aerosols
is found to be of comparable importance with respect to
ClON02+H20, and it is found to represent a significant
source of active chlorine in the Antarctic spring
A Numerical Study of the Possible Perturbation of Stratospheric Dynamics due to Pinatubo Aerosols: Implications for Tracer Transport
No full text
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