Solomon, Susan

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NASA Technical Reports Server

1-71517
Two-dimensional perspective on ozone depletion
Susan Solomon, NOAA Aeronomy Laboratory, Boulder, CO
NASA trends workshop, Boulder, CO, March 5-7,1986
Quantitative estimates of the effect of increasing chlorine abundances
on stratospheric ozone have largely been performed with one-dimensional
models. Current one-dimensional models predict a rather small steady
state ozone column reduction of about 4-6%. These small values result
from a balance between large depletions in the upper stratosphere and
increases in the lower stratosphere (the chemicarself-healing" effect),
so that the total column change is a small difference between the two. It
is however, well established that lower stratospheric ozone is largely
dynamically (not chemically) dominated, particularly at middle and high
latitudes in winter. In particular, the chemical self-healing is likely to be
much less important at high latitudes than one-dimensional model
projections indicate, leading to greater total ozone column changes there.
Further, latitudinal variations in long-lived species such as CH4 are
expected to produce latitudinal gradients in CIO and HC1, with associated
effects on the ozone changes near 40 km. These and other
two-dimensional variations in trace species related to ozone depletion
projections will be explored.
Reference. Solomon, S., R. R. Garcia, and F. Stordal, J. Geophys. Res., 90,
12981-12989, 1985.
https://ntrs.nasa.gov/search.jsp?R=19910073962 2020-03-17T14:53:02+00:00Z


Two-dimensional perspective on ozone depletion

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