Scientific Assessment of Ozone Depletion: 1994

Executive Summary

1994 Ozone Assessment Executive Summary cover

Recent Major Scientific Findings and Observations

The laboratory investigations, atmospheric observations, and theoretical and modeling studies of the past few years have provided a deeper understanding of the human-influenced and natural chemical changes in the atmosphere and their relation to the Earth's stratospheric ozone layer and radiative balance of the climate system. Since the last international scientific assessment of the state of understanding, there have been several key ozone-related findings, observations, and conclusions:

Supporting Scientific Evidence and Related Issues

Ozone Changes in the Tropics and Midlatitudes and Their Interpretation

Polar Ozone Depletion

Coupling Between Polar Regions and Midlatitudes

Tropospheric Ozone

Trends in Source Gases Relating to Ozone Changes

Consequences of Ozone Changes

Related Phenomena and Issues

Methyl Bromide
Ozone Depletion Potentials (ODPs)
Global Warming Potentials (GWPs)

Implications for Policy Formulation

The research findings of the past few years that are summarized above have several major implications as scientific input to governmental, industrial, and other policy decisions regarding human-influenced substances that lead to depletion of the stratospheric ozone layer and to changes of the radiative forcing of the climate system: