On 1 July 2025, NIWA merged with GNS Science to become Earth Sciences New Zealand.

Surface ozone: June-August mean increase in 2100 relative to 2000

June-July-August mean increase in surface ozone in 2100, relative to 2000 (in parts per billion by volume, from Zeng et al., Geophys. Res. Lett., 2010). Click to enlarge