NIWA has transformed 1.5 million square kilometres of data into the most accurate and detailed map yet of the land underneath the sea around New Zealand.

In comparison to the vast span of geological time, the estuaries that we see today are very recent coastal features.

How may agricultural activities impact riparian vegetation around a waterway?

PPM and PPB are units used in atmospheric chemistry to describe the concentration of gases.

NIWA's educational resources and scientific data are tools for young people to learn about science.

Data from our research which we make publicly available.

To get the most benefit from a fish stock in the long term, we need to maximise our yield without damaging the fish population we rely on.

This system combines daily sea-level data from NIWA, regional councils, port companies, Antarctica NZ, Bureau of Meteorology and territorial authorities.

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.