Atmospheric analysis

Of the more than 70 aquatic plant species naturalised in New Zealand, more than 75% have become problem weeds or have been assessed as having the potential to become future problem weeds. Most of our lakes, rivers and streams are affected by at least one of these species.

RV Tangaroa Summary Voyages 2018 -2019

The first month of data from NIWA’s air quality monitoring project in Arrowtown reveals that air quality has already breached the national standard eight times this winter, including six times in the week from 19 to 26 June – in fact every time the air temperature dropped below freezing.

Impacts of catchment characteristics on the timing of sediment delivery during runoff events.

Braided rivers are an arena where woody weeds and floods are in constant competition with each other.
Braided rivers naturally flood frequently, repeatedly mobilising their bed sediments and shifting their multiple channels.

We’re now halfway through 2019 and NIWA climate data from the first six months tell a dramatic story of weather and climate extremes.

Read NIWA's 2018 Half Year Report.

We’re here already – the shortest day is tomorrow (Saturday) and after this, it gets progressively lighter out to the longest day of the year in December.

Understanding how the Antarctic oceans work is vital to predicting the world’s future climate and the implications of climate change for humankind and the planet.

An introduction to NIWA scientists and the wide range of work they do. Our staff work across freshwater, climate and ocean research platforms throughout New Zealand and the wider Pacific region.

New Zealanders are fast becoming aware that our changing climate matters a great deal. NIWA Chief Executive John Morgan explains.

While most New Zealanders were settling into their summer break, some scientists were double-checking their survival gear before heading to work deep in the Southern Ocean.