AI shows NZ's worst downpours will intensify with warming
Researchers used AI to show extreme rainfall in New Zealand will intensify by about 9% per degree of warming.
Scientists trained artificial intelligence on 140 years of regional climate data to simulate hundreds of possible futures for New Zealand. The AI found that as the planet warms, the rarest downpours become much more intense, increasing by about 9% per degree of warming averaged across the country.
Heavy rainfall we experience often increases only 5.6% per degree, so extreme events worsen faster. A warmer atmosphere holds more water vapour, allowing storms to dump heavier rain.
The AI also found that warming widens the gap between milder and severe possible futures, meaning extreme outcomes become even more variable. The tool generated over 15,000 simulated years in six hours using four specialised computer chips, work that would take conventional climate models years to complete.
- 140 years
- Climate data span
- 9%
- Extreme rain increase per degree
- 15,000+
- Simulated years generated
- 4 specialised
- Computer chips used
Why it mattersExtreme downpours cause the worst flooding and damage. Knowing how severe they could become helps communities prepare for what lies ahead.
AustraliaNew Zealand faces intensifying extreme rainfall as climate warms, raising risks of severe flooding and infrastructure damage that could affect neighbouring Australia through regional weather patterns and shared emergency response lessons.
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