Credit: Becky Alexander/University of Washington
Air temperature (black) and the relative abundance of ozone (red) compared to other oxidants. The top panel shows the full, 100,000-year ice core record. As Earth warms up after the last ice age (top panel, far left), the relative abundance of ozone drops. The bottom panel is a close-up of a Dansgaard-Oeschger event, a quicker temperature swing. Here the temperature drops suddenly while the relative abundance of ozone rises.