Articles | Volume 19, issue 6
https://doi.org/10.5194/cp-19-1201-2023
https://doi.org/10.5194/cp-19-1201-2023
Research article
 | 
20 Jun 2023
Research article |  | 20 Jun 2023

Effects of ozone levels on climate through Earth history

Russell Deitrick and Colin Goldblatt

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Short summary
Prior to 2.5 billion years ago, ozone was present in our atmosphere only in trace amounts. To understand how climate has changed in response to ozone build-up, we have run 3-D climate simulations with different amounts of ozone. We find that Earth's surface is about 3 to 4 °C degrees cooler with low ozone. This is caused by cooling of the upper atmosphere, where ozone is a warming agent. Its removal causes the upper atmosphere to become drier, weakening the greenhouse warming by water vapor.