Articles | Volume 19, issue 6
Research article
20 Jun 2023
Research article |  | 20 Jun 2023

Effects of ozone levels on climate through Earth history

Russell Deitrick and Colin Goldblatt

Data sets

Climate model output for Earth with Pre-Cambrian ozone levels R. Deitrick and C. Goldblatt

Model code and software

deitrr/DG_Pre-Cambrian_Ozone: Final version (v1.0) R. Deitrick and C. Goldblatt

CliMT/climt: Update Github actions runners (v0.17.12) J. Monteiro, J. McGibbon, S. D. Abel, monalivadje, S. Kosukhin, L. Kluft, and D. L. Suhas

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.