This is a sub-tropical climate zone, with warm humid summers and mild winters.

The current method for calculating wind speed-up is inadequate, and can grossly under-predict correct design wind speeds in NZ's complex terrain.

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

Drought is a common feature of New Zealand's climate. On average, every year or two somewhere in New Zealand experiences a drought.

Post-Doctoral Fellowship positions at NIWA.

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.

How do agricultural activities potentially influence water flows?

Māori have an extensive knowledge of the ecology of freshwater eels, and have maintained their customary fisheries for several centuries.

Hydrocarbons, although requiring increasingly responsible use, are still an essential part of our modern economy. NIWA has provided survey and consultancy services related to the exploration of offshore mineral resources for thirty years.

The condition of many NZ lakes is under threat from land-use changes and the invasion of alien aquatic plants.