Atmospheric analysis

Blooms of hazardous cyanobacteria (blue-green algae) in rivers, lakes and reservoirs can cause problems for both animal and human health.

The greenhouse effect is a warming of the earth's surface and lower atmosphere caused by substances which let the sun's energy through to the ground but impede the passage of energy from the earth back into space.

This weekly update helps assess likelihood of extremely dry weather preceding a drought.

New Zealand rushes (Juncus): species-level factsheets.

New Zealand’s coast is sculpted by ocean waves. Some wave conditions bring joy to surfers and beachgoers, but, at other times, waves can cause major hazards at sea or along the shore.

What are the sources of chemical contamination from wood processing?

A collection of ID guides to algae. Groups include major freshwater algal groups, diatoms and blue-green (cyanobacteria), red and green algae.

NIWA run a computer model which simulates wave heights across the Canterbury continental shelf and along the coast.

The topography of the North Island has a profound effect on the weather of the Bay of Plenty region.

NIWA makes available and regularly updates results from several greenhouse gas measurement projects.

The seafood counter at your local supermarket has changed.

Dataset available for download