The great debate: when does summer begin?

The great debate: when does summer begin?

While both the astronomical and meteorological definitions are valid, NIWA forecasters have turned to Mother Nature’s weather patterns, looking at the warmest 90-day period of the year to provide another perspective on when summer in Aotearoa New Zealand begins.

Opening windows and doors “one of the best ways” to remove Covid-19 from classroom air

Opening windows and doors “one of the best ways” to remove Covid-19 from classroom air

One of the best ways to reduce the likelihood of Covid-19 being transmitted in Aotearoa New Zealand classrooms is simply by opening doors and windows to create natural ventilation, say NIWA air quality experts.

Coastal flooding likely to be main driver for adaptation

Coastal flooding likely to be main driver for adaptation

New NIWA-led research shows increasing flood risk is going to be what leads people to make changes to adapt to sea-level rise.“Rising seas are slowly causing a trifecta of impacts along coastlines in Aotearoa: increasingly frequent flooding, coastal erosion and even permanent inundation,” says Dr Scott Stephens, NIWA Chief Scientist for Coasts & Estuaries.

The largest flood flow ever measured

The largest flood flow ever measured

Flood flows on the Buller River this month were the largest of any river in Aotearoa New Zealand in almost 100 years, NIWA measurements show.Meanwhile, a NIWA monitoring station on the Buller River at Te Kuha, about 10km upstream, was continuously recording water levels throughout the flood.

Climate change content for school kids gets revamp

Climate change content for school kids gets revamp

Young New Zealanders can now access the most up-to-date educational material about the science of climate change and its impacts on Aotearoa thanks to NIWA’s new web section: .

The heatwave in numbers

The heatwave in numbers

NIWA has crunched the data on this week’s heatwave and come up with the following record breakers: Highest temperature: Hanmer Forest 38.4˚C Warmest temperature in Aotearoa so far this summer was recorded at Hanmer Forest on 31st January.