What is it about?
Radiative forcing is a key concept used in climate science to ascertain the strength of different agents, such as greenhouse gases or aerosols among others, in driving climate change. In this context, ozone is recognized as one of the main contributors to radiative forcing according to recent assessments of the Intergovernmental Panel on Climate Change. However, the relative uncertainty remains higher than for other greenhouse gases.
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Why is it important?
Our results indicate that the CMIP ozone radiative forcing is 80% larger in the current phase 6 than a similar estimation based on data used in CMIP phase 5. We also present new insights into how ozone changes have led to stratospheric temperature changes, as well as the geographical distribution of ozone radiative forcing.
Perspectives
In general, human activity has led to an increase in ozone concentrations in the lower atmosphere (the troposphere) and decreases in the upper atmosphere (the stratosphere); our paper investigates the effect of both these changes.
Ramiro Checa-Garcia
University of Reading
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This page is a summary of: Historical Tropospheric and Stratospheric Ozone Radiative Forcing Using the CMIP6 Database, Geophysical Research Letters, April 2018, American Geophysical Union (AGU),
DOI: 10.1002/2017gl076770.
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