Atmospheric analysis

Aotearoa’s main urban areas cover approximately 2% of total available land.

The need to provide upstream passage facilities for ensuring the long term sustainability of migratory freshwater fish populations is now well recognised.

Explore our education and information section to find out about climate and climate change, weather, our atmosphere, estuaries and more.

Here is our complete range of products.

Stormwater poses risks to NZ’s urban streams & coastal waters, affecting ecological health & the cultural, social, & economic value of these environments.

Trees are grown and converted into a range of useful timber and paper products.

CASAL is an advanced software package developed by NIWA for fish stock assessment.

All species of freshwater tuna spawn at sea, although the spawning grounds of only four species are known with certainty worldwide.

NIWA's mission is to conduct leading environmental science to enable the sustainable management of natural resources for New Zealand and the planet.

These datasets are available in a range of formats.